Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Uvest Financial Services Group [Member] Uvest Financial Services Group [Member] UVEST Financial Services Group. Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Total Expected Restructuring Costs Restructuring and Related Cost, Expected Cost Fair Value Disclosures [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] National Retirement Partners [Member] National Retirement Partners [Member] National retirement partners. Concord Capital Partners [Member] Concord Capital Partners [Member] Concord capital partners. Veritat [Member] [Domain] Veritat [Member] [Domain] Veritat Advisors, Inc. Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate Fair Value Measurements, Valuation Techniques Fair Value Measurements, Valuation Techniques Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair value, beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Issuances of contingent consideration Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issues Change in estimated fair value of contingent consideration obligations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Fair value, end of period (Parentheticals) [Abstract] (Parentheticals) [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Allowances on receivable from client Allowance for Doubtful Accounts Receivable Allowances on receivables from others Allowance for Doubtful Other Receivables, Current Accumulated depreciation and amortization, Fixed assets Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated amortization, Debt issuance costs Accumulated Amortization, Deferred Finance Costs Accumulated amortization, Intangible assets Finite-Lived Intangible Assets, Accumulated Amortization Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury stock, shares Treasury Stock, Shares Stockholders' Equity Attributable to Parent [Abstract] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] May 2011 [Member] May 2011 [Member] May 2011 [Member] August 2011 [Member] August 2011 [Member] August 2011 [Member] May 2012 [Member] May 2012 [Member] May 2012 [Member] September 2012 [Member] [Member] September 2012 [Member] [Member] September 2012 [Member] [Member] Commission Fee Paid Per Repurchased Share Commission Fee Paid Per Repurchased Share Commission Fee Paid Per Repurchased Share Stock repurchase program, authorized dollar amount Stock Repurchase Program, Authorized Amount Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Repurchase of common stock, shares Stock Repurchased During Period, Shares Treasury stock acquired, weighted-average price per share Treasury Stock Acquired, Average Cost Per Share Repurchase of common stock Stock Repurchased During Period, Value Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Intangible Assets by Major Class [Table] Schedule of Intangible Assets by Major Class [Table] Schedule of Intangible Assets by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Advisor and financial institution relationships [Member] Advisor And Financial Institution Relationships [Member] Advisor and financial institution relationships. Product sponsor relationships [Member] Product Sponsor Relationships [Member] Product sponsor relationships. Client relationships [Member] Customer Relationships [Member] Trade names [Member] Trade Names [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trademark and trade name [Member] Trademark And Trade Name [Member] Trademark and trade name. Intangible Assets [Line Items] Intangible Assets [Line Items] Intangible Assets [Line Items] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Definite-lived intangible assets: Finite-Lived Intangible Assets, Net [Abstract] Gross Carrying Value Finite-Lived Intangible Assets, Gross Accumulated Amortization Net Carrying Value Finite-Lived Intangible Assets, Net Indefinite-lived intangible assets: Intangible Assets, Net (Excluding Goodwill) [Abstract] Net Carrying Value Indefinite-Lived Intangible Assets (Excluding Goodwill) The components of intangible assets Schedule Of Intangible Asset [Abstract] Schedule of intangible asset. Total intangible assets Intangible Assets, Net (Excluding Goodwill) Investments, Debt and Equity Securities [Abstract] Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] US Government Agencies Debt Securities [Member] US Government Agencies Debt Securities [Member] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Maturities of securities held-to-maturity Held-to-maturity Securities, Debt Maturities [Abstract] U.S. government notes - at amortized cost, Within 1 Year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount U.S. government notes - at amortized cost, 1-3 Years Held To Maturity Securities Debt Maturities After One Through Three Years Net Carrying Amount This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after one year and through three years from the balance sheet date and which are categorized as held-to-maturity. U.S. government notes - at amortized cost, Total Held-to-maturity Securities, Debt Maturities, Net Carrying Amount U.S. government notes - at fair value, Within 1 Year Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value U.S. government notes - at fair value, 1-3 Years Held To Maturity Securities Debt Maturities After One Through Three Years Fair Value This item represents the fair value of debt securities which are expected to mature after one year and through three years from the balance sheet date and which are categorized as held-to-maturity. U.S. government notes - at fair value, Total Held-to-maturity Securities, Debt Maturities, Fair Value Revenue Recognition [Abstract] Interest Expense [Member] Interest Expense [Member] Other cost and expense, operating Other Cost and Expense, Operating Commitments and Contingencies Disclosure [Abstract] 2013 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2014 Operating Leases, Future Minimum Payments, Due in Two Years 2015 Operating Leases, Future Minimum Payments, Due in Three Years 2016 Operating Leases, Future Minimum Payments, Due in Four Years 2017 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Hedged with interest rate swaps [Member] Debt Hedged With Interest Rate Swaps [Member] Debt hedged with interest rate swaps. 2013 Term Loans [Member] Two Thousand Thirteen Term Loans [Member] Two thousand thirteen term loans. 2015 Term Loans [Member] Two Thousand Fifteen Term Loans [Member] Two thousand fifteen term loans. 2017 Term Loans [Member] Two Thousand Seventeen Term Loans [Member] Two thousand seventeen term loans. Term Loan A [Member] Term Loan A [Member] Term Loan A of Credit Agreement entered into on March 29, 2012 [Member] Term Loan B [Member] Term Loan B [Member] Term Loan B of Credit Agreement entered into on March 29, 2012 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Outstanding borrowings Long-term Debt, by Current and Noncurrent [Abstract] Senior secured term loan: Senior Secured Term Loan [Abstract] Senior secured term loan abstract. Balance Secured Debt Rate Debt Instrument, Interest Rate, Stated Percentage Less current borrowings (maturities within 12 months) Long-term Debt, Current Maturities Long-term borrowings - net of current portion Long-term Debt, Excluding Current Maturities Accounting Policies [Abstract] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Due to and from Broker-Dealers and Clearing Organizations [Abstract] Receivables from Product Sponsors, Broker-Dealers and Clearing Organizations and Payables to Broker-Dealers and Clearing Organizations Schedule Of Due To From Broker Dealers And Clearing Organizations [Abstract] Schedule of due to from broker dealers and clearing organizations. Receivables: Receivables from Brokers-Dealers and Clearing Organizations [Abstract] Commissions receivable from product sponsors and others Commissions and Floor Brokerage Receivables Receivable from clearing organizations Receivables from Clearing Organizations Securities failed-to-deliver Securities Failed-to-Deliver Receivable from broker-dealers Receivable From Broker Dealers Receivable from broker-dealers. Total receivables Receivables from Brokers-Dealers and Clearing Organizations Payables: Payables to Broker-Dealers and Clearing Organizations [Abstract] Securities loaned Deposits Received for Securities Loaned, at Carrying Value Payable to clearing organizations Payable To Clearing Organizations Payable to clearing organizations. Securities failed-to-receive Securities Failed-to-Receive Payable to broker-dealers Payable To Broker Dealers Payable to broker-dealers. Total payables Payables to Broker-Dealers and Clearing Organizations Equity method investment ownership exceeding limit Equity Method Investment, Ownership Percentage Finite-lived intangible assets, minimum useful lives Finite-lived intangible assets, minimum useful lives The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intanbile assets that cna be grouped together becasue they are similar either by their nature or by their use in the operations of a company. Finite-lived intangible assets, maximum useful lives Finite-lived intangible assets, maximum useful lives The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. Impairment charges of advisor and financial institution relationships Impairment of Intangible Assets, Finite-lived Impairment charges of trademarks and trade names Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Asset impairment charges Asset Impairment Charges Likelihood of realization of tax position upon settlement, minimum Likelihood of Realization of Tax Position Upon Settlement, Minimum Likelihood of Realization of Tax Position Upon Settlement, Minimum Income Tax Disclosure [Abstract] Summary of provision for income taxes Income Tax Expense (Benefit), Continuing Operations [Abstract] Current provision (benefit): Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Total current provision (benefit) Current Income Tax Expense (Benefit) Deferred benefit: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Total deferred benefit Deferred Income Tax Expense (Benefit) Provision for (Benefit from) income taxes Income Tax Expense (Benefit) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained Earnings Retained Earnings [Member] Net income (loss) Net Income (Loss) Attributable to Parent Adjustment for items reclassified to earnings, net of tax expense of $527 at December 31, 2012, $2,258 at December 31, 2011 and $3,235 at December 31, 2010 (Note 13) Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Total other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Total Comprehensive Income (Loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Fair Value Inputs, Liabilities, Quantitative Information [Table] Fair Value Inputs, Liabilities, Quantitative Information [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block] Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block] Financial assets and financial liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Reconciliation of contingent consideration classified as a liability using significant unobservable inputs (Level 3) Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule for uncollectible amounts due from others [Table] Schedule for uncollectible amounts due from others [Table] Rollforward schedule for uncollectible amounts due from others [Table] Receivables [Axis] Receivables [Axis] Receivables [Axis] Receivables [Domain] Receivables [Domain] Receivables [Domain] Receivables from others [Member] Receivables from others [Member] Receivables from others consisting primarily of other accrued fees from product sponsors and advisors [Member] Valuation Allowance [Line Items] Movement in Valuation of Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Beginning balance - January 1 Provision for bad debts Provision for Doubtful Accounts Charge-offs - net of recoveries Write Off Of Allowances For Other Receivables Write off of allowances for other receivables. Ending balance - December 31 Payables and Accruals [Abstract] Summary of accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities [Abstract] Accounts payable accruals Accounts Payable Accrued net payroll Accrued Salaries Contingent consideration obligations Business Acquisition, Contingent Consideration, Potential Cash Payment Advisor deferred compensation plan liability Deferred Compensation Arrangement with Individual, Recorded Liability Deferred rent Accrued Rent Other accrued liabilities Other Accrued Liabilities Total accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities Indebtedness Debt Disclosure [Text Block] Earnings Per Share [Abstract] Basic earnings per share: Earnings Per Share, Basic [Abstract] Net income (loss), as reported Allocation of undistributed earnings to stock units Undistributed Earnings Allocated to Participating Securities Net income (loss), for computing basic earnings per share Net Income (Loss) Available to Common Stockholders, Basic Diluted earnings per share: Earnings Per Share, Diluted [Abstract] Allocation of undistributed earnings to stock units Undistributed Earnings Allocated To Participating Securities Diluted Diluted earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. Net income (loss), for computing diluted earnings per share Net Income (Loss) Available to Common Stockholders, Diluted Reconciliation of weighted average shares for the basic and diluted shares computations Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Basic Dilutive common share equivalents Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted average number of shares outstanding Weighted Average Number of Shares Outstanding, Diluted Basic and diluted (loss) earnings per share Earnings Per Share, Basic and Diluted [Abstract] Basic earnings (loss) per share Earnings Per Share, Basic Diluted earnings (loss) per share Earnings Per Share, Diluted Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock [Member] Restricted Stock [Member] Restricted stock awards [Member] Restricted stock awards [Member] Share awards for directors that an entity has not yet issued because the agreed-upon consideration, such as employee services, has not yet been received. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Summary of the status of the Company's restricted stock awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Number of Shares, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of Shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of Shares, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of Shares, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Shares, Ending Balance Weighted-Average Grant-Date Fair Value, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted-Average Grant-Date Fair Value, Ending Balance Schedule of Restricted Cash and Cash Equivalents [Table] Schedule of Restricted Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Cash Equivalents, Days to Maturity, Maximum Cash Equivalents, Days to Maturity, Maximum Cash Equivalents, Days to Maturity, Maximum Quarterly Financial Information Disclosure [Abstract] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Summary of borrowing activity in the revolving and uncommitted line of credit facilities Line of Credit Facility [Abstract] Average balance outstanding Line of Credit Facility, Average Outstanding Amount Weighted-average interest rate Long-term Debt, Weighted Average Interest Rate Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair value of interest rate swap Interest Rate Cash Flow Hedge Derivative at Fair Value, Net Interest rate swap, fixed pay rate Derivative, Fixed Interest Rate Interest rate swap, variable receive rate Derivative, Variable Interest Rate Notional Amount of Interest Rate Cash Flow Hedge Derivatives Which Matured Notional Amount of Interest Rate Cash Flow Hedge Derivatives Which Matured Notional Amount of Interest Rate Cash Flow Hedge Derivatives Which Matured Reclassified gains related to interest rate swap agreements Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) Interest rate cash flow hedge gain (loss) reclassified Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Net revenues Revenues Dividends declared per share Common Stock, Dividends, Per Share, Declared Securities Borrowed and Loaned [Table] Securities Borrowed and Loaned [Table] Securities Borrowed and Loaned [Axis] Securities Borrowed and Loaned [Axis] Axis for table of carrying values as of the balance sheet date of securities borrowed from broker-dealers or institutions (a) to deliver them in place of securities not available because of short-sales or late or ineffective deliveries; (b) to lend them in connection with finder or conduit transactions; and (c) to be used for other purposes permitted under federal regulations and for securities loaned, which represents the amount of cash received as security in return for loaning securities to another party. Securities Borrowed and Loaned [Domain] Securities Borrowed and Loaned [Domain] Domain for the carrying values as of the balance sheet date of securities borrowed from broker-dealers or institutions (a) to deliver them in place of securities not available because of short-sales or late or ineffective deliveries; (b) to lend them in connection with finder or conduit transactions; and (c) to be used for other purposes permitted under federal regulations and of securities loaned, which represents the amount of cash received as security in return for loaning securities to another party. [Domain] Securities borrowed and loaned [Line Items] Securities borrowed and loaned [Line Items] Securities borrowed and loaned [Line Items] Securities borrowed, contract value Securities Borrowed Securities loaned, contract value Securities Loaned Securities borrowed, collateral market value Securities Borrowed, Fair Value Disclosure Securities loaned, collateral market value Securities loaned, fair value The fair value of securities loaned to broker-dealers or other financial institutions. Future minimum payments under leases, lease commitments and other non cancellable contractual obligations Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Summary of accounts payable and accrued liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Interest Rate Swaps Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Fortigent [Member] Fortigent [Member] Fortigent Holdings Company, Inc. and its wholly owned subsidiaries Fortigent, LLC, Fortigent Reporting Company, LLC, and Fortigent Strategies Company, LLC. Goodwill [Line Items] Goodwill [Line Items] Goodwill Goodwill Goodwill, Acquired During Period Business Acquisition, Purchase Price Allocation, Goodwill Amount Consolidated Financial Statements Schedule of Quarterly Financial Information [Table Text Block] Goodwill and Intangible Asset Impairment [Abstract] Components of the net deferred tax liabilities Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax assets: Deferred Tax Assets, Net [Abstract] Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Severance Payments Share-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost State taxes Deferred Tax Assets, Operating Loss Carryforwards, State and Local Deferred rent Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent Provision for bad debts Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Net operating losses Deferred Tax Assets, Operating Loss Carryforwards Unrealized gain on interest rate swaps Deferred Tax Assets, Derivative Instruments Other Deferred Tax Assets, Other Subtotal Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Amortization of intangible assets and trademarks and trade names Deferred Tax Liabilities, Intangible Assets Depreciation of fixed assets Deferred Tax Liabilities, Property, Plant and Equipment Total deferred tax liabilities Deferred Tax Liabilities, Net Deferred income taxes - net Deferred Tax Assets, Net Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transactions, by Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Artisan Partners Limited Partnership [Member] Artisan Partners Limited Partnership [Member] Artisan partners limited partnership. American Beacon Advisor [Member] American Beacon Advisor [Member] American Beacon Advisor XOJET [Member] XOJET [Member] XOJET, Inc. SunGard Data Systems [Member] SunGard Data Systems [Member] SunGard Data Systems Inc. Aplifi, Inc. [Member] Aplifi, Inc. [Member] Aplifi, Inc. TPG Capital [Member] TPG Capital [Member] TPG Capital UVEST Financial Services Group, Inc. [Member] UVEST Financial Services Group, Inc. [Member] UVEST Financial Services Group, Inc. [Member] Cresa Partners [Member] Cresa Partners [Member] Cresa Partners LLC. Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related party transactions expenses Related Party Transaction, Expenses from Transactions with Related Party Revenue from related party transactions Revenue from Related Parties Related party transactions due amounts including transactions in consolidated financial statements Due from Related Parties Related party transactions payable amounts including transactions in consolidated financial statements Due to Related Parties Forgave loans to stockholders Stockholders Loans Forgiven portion of previously issued loans to certain shareholders, net of interest incurred. Compensation and Retirement Disclosure [Abstract] Employee and Advisor Benefit Plans Compensation and Employee Benefit Plans [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and securities segregated under federal and other regulations Cash and Securities Segregated under Federal and Other Regulations Receivables from: Receivables [Abstract] Clients, net of allowance of $587 at December 31, 2012 and $716 December 31, 2011 Receivables from Customers Product sponsors, broker-dealers and clearing organizations Others, net of allowances of $6,675 at December 31, 2012 and $8,833 at December 31, 2011 Other Receivables, Net, Current Securities owned: Securities Owned Abstract Securities owned: Trading — at fair value Trading Securities Held-to-maturity Held-to-maturity Securities Securities borrowed Income taxes receivable Income Taxes Receivable Fixed assets, net of accumulated depreciation and amortization of $324,684 at December 31, 2012 and $305,143 at December 31, 2011 Property, Plant and Equipment, Net Debt issuance costs, net of accumulated amortization of $4,903 at December 31, 2012 and $19,197 at December 31, 2011 Deferred Finance Costs, Net Intangible assets, net of accumulated amortization of $237,681 at December 31, 2012 and $198,139 at December 31, 2011 Other assets Other Assets Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] LIABILITIES: Liabilities [Abstract] Drafts payable Drafts Payable Payables to clients Payables to Customers Payables to broker-dealers and clearing organizations Accrued commission and advisory expenses payable Accrued Commissions And Advisory Fees Payable Balance of accrued commissions, recruiting bonus accruals, and other commissions payable. Accounts payable and accrued liabilities Income taxes payable Taxes Payable Unearned revenue Deferred Revenue, Current Interest rate swaps Interest rate swaps Derivative Liabilities Securities sold, but not yet purchased — at fair value Financial Instruments Sold, Not yet Purchased, at Fair Value Senior secured credit facilities Long-term Debt Deferred income taxes — net Total liabilities Liabilities STOCKHOLDERS' EQUITY: Common stock, $.001 par value; 600,000,000 shares authorized; 115,713,741 shares issued at December 31, 2012 and 110,531,939 shares issued at December 31, 2011 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost — 9,421,800 shares at December 31, 2012 and 2,617,629 shares at December 31, 2011 Treasury Stock, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Statement of Stockholders' Equity [Abstract] Common Stock [Member] Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Treasury Stock Treasury Stock [Member] Stockholder Loans Stockholder Loans [Member] Stockholder Loans Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings BEGINNING BALANCE BEGINNING BALANCE, shares Shares, Issued Comprehensive income: Stockholder loans Revocation of restricted stock awards, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Issuance of common stock to settle restricted stock units Stock Issued During Period, Value, Restricted Stock Award Released Value of stock related to Restricted Stock Awards released during the period. Issuance of common stock to settle restricted stock units, shares Stock Issued During Period, Shares, Restricted Stock Award Released Shares of stock related to Restricted Stock Awards released during the period. Treasury stock purchases Treasury Stock, Value, Acquired, Cost Method Treasury stock purchases, shares Treasury Stock, Shares, Acquired Cash dividends on common stock Dividends, Common Stock, Cash Stock options exercises and other Stock Issued During Period, Value, Stock Options Exercised Stock options exercises and other, shares Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Excess tax benefits from share-based compensation Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Share-based Compensation, Shares Stock Issued During Period, Shares, Share-based Compensation, Gross Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Common Stock, Shares, Issued Stock Issued During Period, Shares, New Issues Issuance of common stock Stock Issued During Period, Value, New Issues ENDING BALANCE ENDING BALANCE, shares Concentration Risk Credit Risk Financial Instruments Off Balance Sheet Risk [Abstract] Concentration risk credit risk financial instruments off balance sheet risk. Financial Instruments with Off-Balance-Sheet Credit Risk and Concentrations of Credit Risk Concentration Risk Credit Risk Financial Instruments Off Balance Sheet Risk [Text Block] Description of financial instruments, excluding certain derivatives, with off-balance sheet credit risk (for example, standby letters of credit or financial guarantees), including (1) information about the (shared) activity, region or economic characteristic that identifies the concentration, (2) the face or contract amount of the instrument, (3) the nature and terms of the instrument, including the market risk, cash requirements and accounting policies for it, (4) the maximum amount of loss due to credit risk that would be incurred if the counterparties failed completely to perform according to the terms of the contracts, and any security or collateral that proved to be of no value, (5) the entity's policy of requiring collateral or other security to support financial instruments subject to credit risk, information about access to collateral or other security, and a brief description of the security supporting those financial instruments, and (6) the policy of entering into and a brief description of master netting arrangements to mitigate the credit risk, and the extent to which such arrangements would reduce the maximum amount of loss due to credit risk. Schedule of Business Acquisitions, by Acquisition [Table] NRP [Member] CCP [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Acquisitions (Textuals) [Abstract] Business Combinations [Abstract] Cash paid to acquire certain assets Business Acquisition, Cost of Acquired Entity, Cash Paid Cash paid to escrow Business Acquisition Cost Of Acquired Entity Cash Placed In Escrow Business acquisition cost of acquired entity cash placed in escrow. Business Acquisition Cost of Acquired Entity Cash Remaining in Escrow Business Acquisition Cost of Acquired Entity Cash Remaining in Escrow Cash remaining in escrow that was placed there as a cost for a business acquisition. Business acquisition, cost of acquired entity, additional consideration Business Acquisition Cost of Acquired Entity Additional Consideration Business acquisition cost of acquired entity additional cash consideration. Business acquisition, cost of acquired entity, additional consideration and escrow payment Business Acquisition cost of acquired entity additional consideration and escrow payment Business Acquisition cost of acquired entity additional consideration and escrow payment Business Acquisition Cost Of Acquired Entity Cash Paid Out of Escrow Business Acquisition Cost Of Acquired Entity Cash Paid Out of Escrow Cash Paid Out of Escrow for Business Acquisition. Estimate of future contingent consideration Estimate of future contingent consideration Estimate of future contingent consideration Contingent consideration Business Acquisition, Contingent Consideration, at Fair Value Advance payments for contingent consideration Advance Payments for Contingent Consideration Advance payments for contingent consideration. Total purchase price Business Acquisition, Cost of Acquired Entity, Purchase Price Business acquisition, cost of acquired entity, transaction cost Business Acquisition Cost Of Acquired Entity Transaction Cost - Current Period Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition in the current period. Maximum amount of contingent consideration Maximum amount of contingent consideration Maximum amount of contingent consideration. Total consideration for the acquisition Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net Business Acquisition Cost Of Acquired Entity Total Transaction Cost over Transaction Period Business Acquisition Cost Of Acquired Entity Total Transaction Cost over Transaction Period Total amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition over the transaction period. Document and Entity Information [Abstract] Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Amendment Flag Amendment Flag Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Measurements Fair Value Disclosures [Text Block] Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Employee and Advisor Benefit Plans (Textuals) [Abstract] Employee and Advisor Benefit Plans (Textuals) [Abstract] Employee and Advisor Benefit Plans. Contribution made to plan Percentage of amount designated by the employee for withholding Percentage of amount designated by the employee for withholding Percentage of employees eligible compensation Percentage Of Employees Eligible Compensation Percentage of employees eligible compensation. Percentage of Amount Designated by Employee Additional Match Percentage of Amount Designated by Employee Additional Match Percentage of Amount Designated by Employee for the Company to make an additional match. Percentage Of Employees Eligible Compensation Additional Match Percentage Of Employees Eligible Compensation Additional Match Percentage Of Employees Eligible Compensation Additional Match Total contribution cost recognized Defined Contribution Plan, Cost Recognized Employee stock purchase plan purchase price discount Employee Stock Purchase Plan Purchase Price Discount Discount percentage on purchase price per share of common stock at market value of the shares at the lower of the grant date price (first day of the offering period) and the purchase date price (last day of the offering period). Deferred Compensation Arrangements [Abstract] Deferred Compensation Arrangements [Abstract] Deferred Compensation Arrangement with Individual, Recorded Liability Deferred Compensation Arrangement with Individual, Employer Contribution Deferred Compensation Arrangement with Individual, Employer Contribution Deferred Compensation Arrangement with Individual, Compensation Expense Deferred Compensation Arrangement, Rabbi Trust, Employer Contribution The amount of payment into the fund established for purposes of making future disbursements to the individuals in accordance with the terms and understanding of the deferred compensation arrangement. Deferred Compensation Arrangement, Rabbi Trust, Recorded Liability Deferred Compensation Arrangement, Rabbi Trust, Recorded Liability The carrying amount of the liability as of the balance sheet date to individuals under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. Component of Other Operating Cost and Expense [Table] Component of Other Operating Cost and Expense [Table] Component of Other Operating Cost and Expense [Axis] Component of Other Operating Cost and Expense [Axis] Component of Other Operating Cost and Expense, Name [Domain] Component of Other Operating Cost and Expense, Name [Domain] Temporary Employee and Contractor Services [Member] Other Operating Expense [Member] Component of Operating Other Cost and Expense [Line Items] Component of Operating Other Cost and Expense [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Shares Outstanding, Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of Shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Number of Shares, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Shares, Forfeited Stock Issued During Period, Shares, Share-based Compensation, Forfeited Number of Shares Outstanding, Ending Balance Number of Shares, Exercisable, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price, Beginning Balance Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Weighted-Average Exercise Price, Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Ending Balance Weighted-Average Exercise Price, Outstanding, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term for Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term for Options Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Exercisable, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Income Taxes Income Tax Disclosure [Text Block] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Affiliated Entity [Member] Affiliated Entity [Member] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Benefit from newly enacted change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate Income Taxes (Textuals) [Abstract] Income Taxes (Textuals) [Abstract] Income taxes. Transaction expenses Effective Income Tax Rate Reconciliation Transaction Costs Effective income tax rate reconciliation transaction costs. Transaction expenses not deductible for tax purposes Income Tax Reconciliation Nondeductible Expense Transaction Costs Income tax reconciliation nondeductible expense transaction costs. Increase to additional paid-in capital Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Gross unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits, net of the federal benefit on state issues, favorable income tax rate effect Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits, interest accrued Unrecognized Tax Benefits, Interest on Income Taxes Accrued Unrecognized tax benefits, penalties accrued Unrecognized Tax Benefits, Income Tax Penalties Accrued Unrecognized tax benefits, interest expense included in tax expense Unrecognized Tax Benefits, Interest on Income Taxes Expense Reduction in unrecognized tax benefits related to the statute of limitations Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Commitments and Contingencies [Table] Commitments and Contingencies [Table] Commitments and Contingencies [Table] Collateral Received from Client by Third Party Pledge Recipient [Axis] Collateral Received from Client by Third Party Pledge Recipient [Axis] Collateral Received from Client by Third Party Pledge Recipient [Axis] Pledge Recipient [Domain] Pledge Recipient [Domain] Pledge Recipient [Domain] Options Clearing Corporation [Member] Options Clearing Corporation [Member] Options Clearing Corporation [Member] National Securities Clearing Corporation [Member] National Securities Clearing Corporation [Member] National Securities Clearing Corporation [Member] Commitments and Contingencies [Line Items] Commitments and Contingencies [Line Items] Commitments and Contingencies [Line Items] Receivables from Clearing Organizations Trading Securities Pledged as Collateral Minimum sublease rental income Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Operating Leases Future Minimum Payments Due In Two Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due In Three Years, Future San Diego Office Lease For the future San Diego Office Lease having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating. Operating Leases Future Minimum Payments Due In Three Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due In Four Years, Future San Diego Office Lease For the future San Diego Office Lease having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating. Operating Leases Future Minimum Payments Due In Four Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due In Five Years, Future San Diego Office Lease For the future San Diego Office Lease having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating. Operating Leases Future Minimum Payments Due In Five Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due In Six Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due In Six Years, Future San Diego Office Lease Operating Leases Future Minimum Payments Due Thereafter, Future San Diego Office Lease Operating Leases Future Minimum Payments Due Thereafter, Future San Diego Office Lease For the future San Diego Office Lease having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date relating to leases defined as operating. Operating leases rental expense Operating Leases, Rent Expense, Net Legal expenses related to third-party indemnification agreement Litigation Settlement, Expense Gross receivable for amounts due from the indemnifying party Loss Contingency, Related Receivable Carrying Value Amount received from third-party indemnitor Loss Contingency, Related Receivable Carrying Value, Receipts Legal expenses Legal Fees Other Commitments [Abstract] Other Commitments [Abstract] Other Commitments [Abstract] Collateral security Customer Securities for which Entity has Right to Sell or Repledge, Fair Value Fair value of securities received as collateral that can be resold or repledged Customer Securities for which Entity has Right to Sell or Repledge, Fair Value of Securities Sold or Repledged Collateral security pledged in bank Collateral Security Pledged In Bank Collateral security pledged to bank in connection with unutilized secured margin lines of credit. Collateral security remaining unpledged Customer Securities for which Entity has Right to Sell or Repledge, Remaining Unpledged Amount Customer Securities for which Entity has Right to Sell or Repledge, Remaining Unpledged Amount Fair Value of Securities Received as Collateral that Can be Resold or Repledged Fair Value of Securities Received as Collateral that Can be Resold or Repledged Schedule For Uncollectable Amounts Due From Clients [Table Text Block] Schedule For Uncollectable Amounts Due From Clients [Table Text Block] Schedule for uncollectable amounts due from clients. Schedule for uncollectible amounts due from others Schedule for uncollectible amounts due from others [Table Text Block] Schedule for uncollectible amounts due from others [Table Text Block] Securities borrowed and loaned Securities borrowed and loaned [Table Text Block] Securities borrowed and loaned [Table Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Noncash items: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Amortization of debt issuance costs Amortization of Financing Costs Impairment of fixed assets Impairment of Long-Lived Assets Held-for-use Loss on disposal of fixed assets Gain (Loss) on Disposition of Assets Share-based compensation Share-based Compensation Excess tax benefits related to share-based compensation Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities Deferred income tax provision Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt Impairment of intangible assets Impairment of Intangible Assets (Excluding Goodwill) Lease abandonment Lease Abandonment Non-cash expenses incurred due to early abandonment of facilities leased under non-cancellable lease agreements. Change in estimated fair value of contingent consideration obligations Loan forgiveness Loan Forgiveness Forgiven portion of previously issued loans to certain shareholders, net of interest incurred. Other Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Cash and securities segregated under federal and other regulations Cash And Securities Segregated Under Federal And Other Regulations Changes In Operating Assets And Liabilities The net change during the reporting period in the amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers pursuant). Receivables from clients Increase Decrease Receivables From Clients The net change during the reporting period in receivables from brokerage clients. Brokerage client balances include margin loans to clients stated, net of allowance for doubtful accounts. Receivables from product sponsors, broker-dealers and clearing organizations Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations Receivables from others Increase (Decrease) in Other Receivables Securities owned Increase (Decrease) in Trading Securities Securities borrowed Increase (Decrease) in Securities Borrowed Other assets Increase (Decrease) in Other Operating Assets Drafts payable Drafts Payable Changes In Operating Assets And Liabilities The net change during the reporting period in the amounts due on drafts payable during the reporting period. Payables to clients Increase Decrease Payables To Clients The net change during the reporting period in payables to clients, includes amounts payable on cash and margin transactions, including interest on certain client balances. Payables to broker-dealers and clearing organizations Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations Accrued commissions and advisory expenses payable Changes In Accrued Commissions And Advisory Fees Payable The net change in the balance of accrued commissions, recruiting bonus accruals, and other commissions payable over the reporting period. Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income taxes receivable/payable Increase (Decrease) in Income Taxes Unearned revenue Increase (Decrease) in Deferred Revenue Securities sold, but not yet purchased Increase (Decrease) in Financial Instruments Sold, Not yet Purchased Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Proceeds from disposal of fixed assets Proceeds from Sale of Productive Assets Purchase of securities classified as held-to-maturity Payments to Acquire Held-to-maturity Securities Proceeds from maturity of securities classified as held-to-maturity Proceeds from Sale and Maturity of Held-to-maturity Securities Proceeds from the sale of equity investment Proceeds from Sale of Equity Method Investments Deposits of restricted cash Deposits Of Restricted Cash Deposits made during the period into an escrow account whose use is restricted. Release of restricted cash Release Of Restricted Cash Releases of cash during the period from an escrow account whose use is restricted. Acquisitions, net of cash acquired (Note 3) Payments to Acquire Businesses, Net of Cash Acquired Purchase of minority interest investments Payments to Acquire Additional Interest in Subsidiaries Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Repayment of senior credit facilities Repayments of Long-term Lines of Credit Proceeds from senior credit facilities Proceeds from Long-term Lines of Credit Redemption of subordinated notes Repayments of Subordinated Debt Payment of debt amendment costs Payments of Debt Issuance Costs Repurchase of common stock Payments for Repurchase of Common Stock Dividends on common stock Payments of Dividends Excess tax benefits related to share-based compensation Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Proceeds from stock options and warrants exercised Proceeds from Stock Options Exercised Issuance of common stock Proceeds from Issuance of Common Stock Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities NET INCREASE IN CASH AND CASH EQUIVALENTS Cash and Cash Equivalents, Period Increase (Decrease) CASH AND CASH EQUIVALENTS - Beginning of year CASH AND CASH EQUIVALENTS - End of year SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income taxes paid Income Taxes Paid NONCASH DISCLOSURES: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Capital expenditures purchased through short-term credit Capital Expenditures Incurred but Not yet Paid Fixed assets acquired under built-to-suit lease Fixed assets acquired under built-to-suit lease Fixed assets resulting from a built-to-suit lease. Gain on interest rate swaps, net of tax expense Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Discount on proceeds from senior credit facilities recorded as debt issuance costs Discount On Proceeds From Senior Credit Facilities Recorded As Debt Issuance Costs Discount on proceeds from senior credit facilities recorded as debt issuance costs Pending settlement of treasury stock purchases Settlement of Purchases of Treasury Stock Pending settlement of treasury stock purchases Property, Plant and Equipment [Abstract] The components of fixed assets Property, Plant and Equipment [Table Text Block] Share Repurchase Program by Authorization Date [Axis] Share Repurchase Program by Authorization Date [Axis] Share Repurchase Program by Authorization Date [Axis] Share Repurchase Program, Authorization Date [Domain] Share Repurchase Program, Authorization Date [Domain] Share Repurchase Program, Authorization Date [Domain] Antidilutive securities excluded from computation of Earnings per Share amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Stock Repurchase Program [Abstract] Equity [Abstract] Treasury stock purchases Summary of company's effective income tax rate reconciliation Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] Federal statutory income tax rates Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate State income taxes - net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense Share-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost Uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingencies Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance Transaction costs Research and development credits Effective Income Tax Rate Reconciliation, Tax Credits, Research Contingent consideration obligations Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other Other Effective Income Tax Rate Reconciliation, Other Adjustments Effective income tax rates Effective Income Tax Rate, Continuing Operations Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Total amortization expense of intangible assets Amortization of Intangible Assets Consolidation, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Compensation Related Costs, Policy [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Health Care Costs, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Receivables From and Payables To Clients [Policy Text Block] Receivables from and payables to clients. Receivables From Product Sponsors Broker Dealers and Clearing Organizations [Policy Text Block] Receivables from product sponsors, broker dealers and clearing organizations. Other Receivables [Policy Text Block] Other receivables. Investment, Policy [Policy Text Block] Securities Owned And Sold But Not Yet Purchased [Policy Text Block] Securities owned and sold but not yet purchased. Securities Borrowed and Loaned Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Research, Development, and Computer Software, Policy [Policy Text Block] Business Combinations Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Goodwill and Intangible Assets, Policy [Policy Text Block] Deferred Loan Issuance And Amendment Costs [Policy Text Block] Deferred loan issuance and amendment costs. Equity Method Investments, Policy [Policy Text Block] Drafts Payable [Policy Text Block] Drafts Payable. Legal Costs, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Comprehensive Loss Income [Policy Text Block] Comprehensive loss income. Activity in goodwill Schedule of Goodwill [Table Text Block] Description of New Accounting Pronouncements Not yet Adopted [Text Block] Description of New Accounting Pronouncements Not yet Adopted [Text Block] The components of intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Amortization expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] The components of fixed assets Property, Plant and Equipment, Net [Abstract] Internally developed software Capitalized Computer Software, Gross Computers and software Computers and Software Computers and Software Leasehold improvements Leasehold Improvements, Gross Furniture and equipment Furniture and Fixtures, Gross Property Land Total fixed assets Property, Plant and Equipment, Gross Accumulated depreciation and amortization Fixed assets - net Interest Base Rate By Type [Axis] Interest Base Rate By Type [Axis] Interest base rate by type. Interest Base Rate By Type [Domain] Interest Base Rate By Type [Domain] Interest base rate by type. Repricing Transaction [Member] Repricing Transaction [Member] Repricing Transaction [Member] Base Rate [Member] Base Rate [Member] Base rate. Libor Rate [Member] Libor Rate [Member] Libor rate. Libor Rate 3 Month [Member] Libor Rate 3 Month [Member] Libor Rate 3 Month [Member] Libor Rate 1 Month [Member] Libor Rate 1 Month [Member] Libor Rate 1 Month [Member] Alternative Base Rate [Member] Alternative Base Rate [Member] Alternative Base Rate [Member] Eurodollar Rate [Member] Eurodollar Rate [Member] Eurodollar Rate [Member] Minimum alternative base rate [Member] Minimum alternative base rate [Member] Minimum alternative base rate [Member] Revolving Line Of Credit [Member] Revolving Line Of Credit [Member] Revolving line of credit. 2015 Term Loans and 2017 Term Loans [Member] Two Thousand Fifteen Term Loans And Two Thousand Seventeen Term Loans [Member] Two thousand fifteen term loans and two thousand seventeen term loans. Tranche 2013 [Member] Tranche 2013 [Member] Tranche 2013 [Member] Senior Unsecured Subordinated Notes [Member] Senior Subordinated Notes [Member] Bank Loans Payable [Member] Bank Loans Payable [Member] Bank loans payable. Minimum [Member] Maximum [Member] Line of Credit Facility [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Revolving Line Of Credit [Member] Quarterly repayments of debt instrument [Axis] Quarterly repayments of debt instrument [Axis] Quaterly repayments of the principal of debt instrument made over stated period of time [Axis] Quarterly repayments of debt instrument [Domain] Quarterly repayments of debt instrument [Domain] Quaterly repayments of the principal of debt instrument made over stated period of time [Domain] Years one and two [Member] Years one and two [Member] Years one and two [Member] Years three, four and five [Member] Years three, four and five [Member] Years three, four and five [Member] Aggregate principal amount of senior secured credit facilities Debt Instrument, Face Amount Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Deferred Finance Costs Capitalized, Credit Agreement Deferred Finance Costs Capitalized, Credit Agreement The amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments added for the Credit Agreement that will be charged against earnings over the life of the debt instruments to which such costs pertain. Line of credit facility to support related party debt Letter of Credit against Line Of Credit Facility Irrevocable letters of credit held against the revolving credit facility. Matured letter of credit related to subsidiary Letter of Credit Matured Letter of Credit Matured Debt instrument periodic payment principal, percent Debt instrument periodic payment principal, percent Required periodic payment percentage applied to principal. Margin rate for borrowings Debt Instrument, Basis Spread on Variable Rate Benchmark short-term interest rate Benchmark Short-term Interest Rate Benchmark Short-term Interest Rate Percentage of commitment fee Line of Credit Facility, Commitment Fee Percentage Amortization of Financing Costs Repayment of Debt Repayment of Debt Repayment of Outstanding Debt Balance Line of credit facility maximum borrowing capacity before amendment Line Of Credit Facility Maximum Borrowing Capacity Before Amendment Line of credit facility maximum borrowing capacity before amendment. Number of uncommitted lines of credit maintaining the company Number Of Uncommitted Lines Of Credit Number of uncommitted lines of credit mainted by the Company. Uncommitted lines of credit, unspecified limit Uncommitted lines of credit, unspecified limit The number of uncommitted lines of credit with an unspecified limit maintained by the Company. Outstanding revolving facility Line of Credit Facility, Amount Outstanding Maturity date of senior secured term loan Debt Instrument, Maturity Date Description of Variable Rate Debt Instrument, Description of Variable Rate Basis Aggregate cash payment for redemption including accrued and unpaid interest Extinguishment of Debt, Amount Notional Amount of Interest Rate Cash Flow Hedge Derivatives Notional Amount of Interest Rate Cash Flow Hedge Derivatives Debt issuance costs for revolving line of credit Debt issuance costs for term loans Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Description of the Company Nature of Operations [Text Block] Consolidation, Parent Ownership Interest [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] LPL Holdings [Member] Lpl Holdings [Member] LPL Holdings. LPL Financial LLC [Member] Lpl Financial Llc [Member] LPL Financial LLC NestWise [Member] NestWise [Member] NestWise [Member] UVEST [Member] Uvest [Member] UVEST. LPL Independent Advisor [Member] LPL Independent Advisor Services Group LLC [Member] LPL Independent Advisor Services Group LLC Independent Advisors Group Corporation [Member] Independent Advisors Group Corporation [Member] Independent Advisors Group Corporation LPL Insurance Associate [Member] Lpl Insurance Associate [Member] LPL Insurance Associate. PTC Holdings, Inc. [Member] Ptc Holdings Inc [Member] PTC Holdings Inc. Consolidation, Parent Ownership Interest [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Ownership interest percentage in subsidiary Ownership Interest Percentage In Subsidiary Ownership interest percentage in subsidiary. Number of states in which entity operates Number of States in which Entity Operates Investments by Category [Axis] Gain (Loss) on Investments, Including Investments Held at Cost [Domain] Gain (Loss) on Investments, Including Marketable Securities and Investments Held at Cost, Categories of Investments [Domain] Summary of amortized cost, gross unrealized gains and fair value of securities held-to-maturity Held-to-maturity Securities, Classified [Abstract] Amortized Cost Gross Unrealized Gains Held-to-maturity Securities, Unrecognized Holding Gain Fair Value Held-to-maturity Securities, Fair Value Restructuring Charges Restructuring Charges Remaining Expected Restructuring Costs Summary of gross unrecognized tax benefits including interest and penalties reconciliation Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance - Beginning of year Increases related to acquired tax positions Unrecognized Tax Benefits Increases Resulting From Acquired Tax Positions Unrecognized tax benefits increases resulting from acquired tax positions. Increases related to current year tax positions Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Reductions as a result of a lapse of the applicable statute of limitations related to acquired tax positions Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations Related To Acquired Tax Positions Unrecognized tax benefits reductions resulting from lapse of applicable statute of limitations related to acquired tax positions. Reductions as a result of a lapse of the applicable statute of limitations related to prior period tax positions Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations Balance - End of year Acquisitions Business Combination Disclosure [Text Block] Fixed Assets Property, Plant and Equipment Disclosure [Text Block] Outstanding borrowings Schedule of Long-term Debt Instruments [Table Text Block] Summary of borrowing activity in the revolving and uncommitted line of credit facilities Schedule of Line of Credit Facilities [Table Text Block] Summary of minimum calendar year payments and maturities of the senior secured borrowings Schedule of Maturities of Long-term Debt [Table Text Block] Regulatory Capital Requirements [Abstract] Net Capital Net Capital Minimum Net Capital Required for Broker-Dealer Subsidiary Minimum Net Capital Required for Broker-Dealer Subsidiary Excess Net Capital Requirement Alternative Excess Net Capital Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Schedule of Acquired Indefinite-lived Intangible Assets by Major Class [Table] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Amortization expense Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] 2013 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2014 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total Earnings per share reconciliation Schedule of Earnings Per Share Reconciliation [Table Text Block] Weighted average shares outstanding reconciliation Schedule of Weighted Average Number of Shares [Table Text Block] Basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Restructuring Cost and Reserve [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Impairment in Value of Asset [Member] Impairment of Intangible Assets [Member] Fair Value by Asset Class [Axis] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Fair Value by Asset Class [Domain] Fixed Assets [Member] Fixed Assets [Member] Fixed Assets [Member] Intangible Assets [Member] Intangible Assets [Member] Intangible Assets [Member] Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Trading Securities and Assets [Domain] Major Types of Debt and Equity Securities [Domain] Money Market Funds [Member] Money Market Funds [Member] Mutual Funds [Member] Mutual Funds [Member] An investment vehicle that is made up of a pool of funds collected from many investors for the purpose of investing in securities such as stocks, bonds, money market instruments and similar assets. Mutual funds are operated by money managers, who invest the fund's capital and attempt to produce capital gains and income for the fund's investors. Equity Securities [Member] Equity Securities [Member] Debt Securities [Member] Debt Securities [Member] US Treasury Obligations [Member] US Treasury Securities [Member] Certificates of Deposit [Member] Certificates of Deposit [Member] Security Owned and Sold, Not yet Purchased, at Fair Value [Axis] Security Owned and Sold, Not yet Purchased, at Fair Value [Axis] Security Owned and Sold, Not yet Purchased Fair Value, Security Name [Domain] Security Owned and Sold, Not yet Purchased Fair Value, Security Name [Domain] Securities Sold, Not yet Purchased [Member] Securities Sold, Not yet Purchased [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Restructuring Reserve, Settled without Cash Restructuring Reserve, Settled without Cash Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Securities owned-trading Trading Securities, Fair Value Disclosure Other assets Other Assets, Fair Value Disclosure Total assets at fair value Assets, Fair Value Disclosure, Recurring Securities sold but not yet purchased - at fair value Securities Sold, Not yet Purchased, Fair Value Disclosure Interest rate swaps Interest Rate Derivative Liabilities, at Fair Value Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Total liabilities at fair value Liabilities, Fair Value Disclosure Asset Impairment Charges [Abstract] Asset Impairment Charges [Abstract] Impairment charge for certain fixed assets Tangible Asset Impairment Charges Held-to-Maturity Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Dividends [Axis] Dividends [Axis] Dividends [Domain] Dividends [Domain] August 2012 [Member] August 2012 [Member] August 2012 [Member] November 2012 [Member] November 2012 [Member] November 2012 [Member] Common Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Dividends, Common Stock, Cash Free credit balances held Free credit balances held Represents free credit balances which are held pending re-investment by the clients. Schedule for uncollectible amounts due from clients [Table] Schedule for uncollectable amounts due from clients [Table] Tabular rollforward disclosure of uncollectable amounts due from clients. Receivables from clients [Member] Receivables from clients [Member] Receivables from clients for amounts due on cash and margin transactions [Member] Movement in Valuation Allowances and Reserves [Roll Forward] Beginning balance - January 1 Ending balance - December 31 UVEST Financial Services Group [Member] Restructuring Charges [Member] Conversion and transfer costs [Member] Conversion and Transfer Costs [Member] Expenditures incurred for the conversion and transfer of advisors and their client accounts. Contract penalties [Member] Contract Termination [Member] Advisor retention and related benefits [Member] Advisor Retention and Related Benefits [Member] Advisor Retention and Related Benefits Expenses. Asset impairments [Member] Restructuring Related Costs Excluded from Total Restructuring Cost Estimate [Member] Restructuring Related Costs Excluded from Total Restructuring Cost Estimate [Member] Restructuring Related Costs Excluded from Total Restructuring Cost Estimate [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Accrued Balance, Beginning of Period Restructuring Reserve Costs incurred Restructuring and Related Cost, Incurred Cost Payments Restructuring Reserve, Settled with Cash Non-cash Accrued Balance, End of Period Cumulative costs incurred to date Restructuring and Related Cost, Cost Incurred to Date Internally developed software Capitalized Computer Software Expected Cumulative Cost Capitalized Computer Software, Expected Cumulative Cost Finite-lived intangible assets, minimum useful life Finite-lived intangible assets, maximum useful life Payments for software development activities Payments to Develop Software Capitalized computer software Related Party Transactions Related Party Transactions Disclosure [Text Block] Schedule of Short-term Debt [Table] Debt Instrument [Axis] Debt Instrument, Name [Domain] Client Activities [Member] Client Activities. Corporate Overdrafts [Member] Corporate Overdrafts. Depreciation and amortization expense for fixed assets Depreciation, Depletion and Amortization Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table] Acquired Finite-Lived Intangible Assets by Major Class [Axis] Client relationships [Member] Trade Names [Member] Advisor Relationships [Member] Advisor Relationships [Member] Advisor relationships. Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Amortization Period Amount Assigned Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets Summary of amortized cost, gross unrealized gains and fair value of securities held-to-maturity Held-to-maturity Securities [Table Text Block] Maturities of securities held-to-maturity Investments Classified by Contractual Maturity Date [Table Text Block] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2008 Nonqualified Deferred Compensation Plan [Member] Nonqualified Deferred Compensation Plan [Member] Nonqualified Deferred Compensation Plan. Income Tax Transaction, by Applicable Tax Year [Axis] Income Tax Transaction, by Applicable Tax Year [Axis] Income Tax Transaction, by Applicable Tax Year [Axis] Income Tax Transaction, Applicable Tax Year [Domain] Income Tax Transaction, Applicable Tax Year [Domain] Income Tax Transaction, Applicable Tax Year [Domain] 2010 [Member] Tax Year Prior to Balance Sheet Date [Member] Tax Year Prior to Balance Sheet Date [Member] 2009 [Member] Tax Year 2 Years Prior to Balance Sheet Date [Member] Tax Year 2 Years Prior to Balance Sheet Date [Member] 2008 [Member] Tax Year 3 Years Prior to Balance Sheet Date [Member] Tax Year 3 Years Prior to Balance Sheet Date [Member] Subsidiary, Sale of Stock [Axis] Subsidiary, Sale of Stock [Axis] Sale of Stock, Name of Transaction [Domain] Sale of Stock, Name of Transaction [Domain] IPO [Member] IPO [Member] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Advisors And Financial Institutions [Member] Advisors And Financial Institutions [Member] Advisors and financial institutions. Employee Stock Option [Member] Employee Stock Option Awards [Member] An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Although there are variations, normally, after vesting, when an option is exercised, the employee-holder pays the strike value in cash to the issuing employer-entity and receives equity shares. The equity shares can be sold into the market for cash at the current market price without restriction. Options may be used to attract, retain and incentivize employees, in addition to their regular salary and other benefits. Share-based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation [Abstract] Share-based Compensation [Abstract] Stock Option and Warrants vest period, minimum Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share based compensation charge Allocated Share-based Compensation Expense Share based compensation cost unrecognized Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Non-vested compensation cost weighted-average period Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Restricted stock award issued Share based compensation charge, per share amount Share Based Compensation Arrangement Shares Issued Price Per Share Share based compensation arrangement shares issued price per share. Income tax refund Income Taxes Paid, Net Share based compensation tax deduction expense Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Recognized tax benefits Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Restricted stock award fair value Authorized unissued shares Share Based Compensation Arrangement By Share Based Payment Award Shares Reserved Share based compensation arrangement by share based payment award shares reserved. Shares outstanding Stock Issued During Period, Shares, Share-based Compensation, Gross Stock Issued During Period, Per Share, Share-based Compensation Stock Issued During Period, Per Share, Share-based Compensation Per share amount of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Stock Issued During Period, Value, Share-based Compensation, Gross Stock Issued During Period, Value, Share-based Compensation, Gross 2008 Nonqualified Deferred Compensation Plan Common Stock, Shares, Issued Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Summary of minimum calendar year payments and maturities of the senior secured borrowings Maturities of Long-term Debt [Abstract] 2013 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2014 Long-term Debt, Maturities, Repayments of Principal in Year Two 2015 Long-term Debt, Maturities, Repayments of Principal in Year Three 2016 Long-term Debt, Maturities, Repayments of Principal in Year Four 2017 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total Summary of changes in accrued restructuring expense balances Schedule of Restructuring and Related Costs [Table Text Block] Restructuring Restructuring and Related Activities Disclosure [Text Block] Schedule of Share-based Compensation Arrangements for Employees and Non-employees [Table] Advisors And Financial Institutions [Member] Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Domain] Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Domain] [Domain] for Schedule of Share-based Compensation Arrangements for Employees, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, by Recipient Type [Axis] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, Recipient Type [Domain] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, Recipient Type [Domain] Schedule of Share-based Compensation Arrangements for Advisors and Financial Institutions, Recipient Type [Domain] Schedule of Share-based Compensation Arrangements for Employees and Non-employees [Line Items] Schedule of Share-based Compensation Arrangements for Employees and Non-employees [Line Items] Schedule of Share-based Compensation Arrangements for Employees and Non-employees [Line Items] Weighted-average assumptions used for calculating the fair value of its stock options and warrants with the Black-Scholes valuation model Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected stock price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Fair value of options Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Allocated Share-based Compensation Expense Schedule of Business Acquisitions, by Acquisition [Table] Advisor Relationships [Member] Product Sponsor Relationships [Member] Fortigent and Veritat [Member] Fortigent and Veritat [Member] Fortigent and Veritat [Member] Reconciliation of assets acquired and liabilities assumed Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net [Abstract] Goodwill Accounts receivable Business Acquisition, Purchase Price Allocation, Current Assets, Receivables Other assets Business Acquisition Purchase Price Allocation Current Assets Other Assets Business acquisition purchase price allocation current assets other assets. Intangibles Fixed assets Business Acquisition, Purchase Price Allocation, Noncurrent Assets Accounts payable and accrued liabilities Business Acquisition, Purchase Price Allocation, Current Liabilities Deferred income taxes - net Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent Net assets acquired Fixed assets useful life (in years) Property, Plant and Equipment, Useful Life Cash paid to escrow Total purchase price Contingent consideration Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement Location [Domain] Tax expense on adjustment for items reclassified to earnings Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Schedule of Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Measurement Frequency [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Affiliated Entities Discontinued Use [Member] Affiliated Entities Discontinued Use. Abandoned Lease Locations [Member] Abandoned Lease Locations. Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Earnings per Share Earnings Per Share [Text Block] Brokers and Dealers [Abstract] Income Statement [Abstract] REVENUES: Revenues [Abstract] Commission Brokerage Commissions Revenue Advisory Investment Advisory Fees Asset-based Asset Based Fees Revenue recognized in the period for fees from cash sweep programs, sponsorship programs, omnibus processing and networking services. Transaction and other Transaction And Other Fees Revenue recognized in the period from transaction fees and ticket charges, subscription fees, IRA custodian fees, contract and license fees, conference fees and small or inactive account fees. Interest income, net of interest expense Interest Income (Expense), Net Other Other Income Total net revenues EXPENSES: Operating Expenses [Abstract] Commission and advisory Commissions And Advisory Fees Gross commissions and advisory fees that are earned and paid out to customers based on the sale of various products and services, production bonuses for achieving production levels, share-based compensation expense for stock options and warrants granted to customers, and deferred commissions for customers as part of a non-qualified deferred compensation plan. Compensation and benefits Labor and Related Expense Promotional Promotional Expenses The total expense recognized in the period for promotional items and business development costs. Depreciation and amortization Professional services Professional Fees Occupancy and equipment Occupancy, Net Brokerage, clearing and exchange Floor Brokerage, Exchange and Clearance Fees Communications and data processing Communications and Information Technology Regulatory fees and other Regulatory Fees And Expenses Expenses incurred during the period for regulatory memberships to FINRA and SIPC, representative licensing fees, some insurance and other regulatory fees. Restructuring charges Other Other Expenses Total operating expenses Operating Expenses Non-operating interest expense Interest Expense, Subordinated Notes and Debentures Loss on extinguishment of debt Total expenses Expenses Total expenses incurred in the period presented, including both operating and non-operating expenses. Excludes income tax expense. INCOME (LOSS) BEFORE (BENEFIT FROM) PROVISION FOR INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest PROVISION FOR (BENEFIT FROM) INCOME TAXES Net income (loss) EARNINGS (LOSS) PER SHARE (Note 16): Basic Diluted Reconciliation of assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Supplemental cash flow information Schedule of business acquisition cash flow supplemental disclosures [Table Text Block] Schedule of business acquisition cash flow supplemental disclosures. Estimated purchase price to specific amortizable intangible asset Business Acquisition Purchase Price Allocation Amortizable Intangible Assets [Table Text Block] Business acquisition purchase price allocation amortizable intangible assets. Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Restructuring Type [Axis] Service Value Commitment [Member] Service Value Commitment [Member] Service Value Commitment [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividends Payable, Amount Per Share Dividends Payable, Amount Per Share Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Weighted-average assumptions used for calculating the fair value of its stock options and warrants with the Black-Scholes valuation model Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of the Company's activity in its stock option and warrant plans Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of information about outstanding stock options and warrants Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Summary of the status of the Company's restricted stock Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Summary of share repurchase plan activity Schedule of Treasury Stock by Class [Table Text Block] Fair value of indebtedness Debt Instrument, Fair Value Disclosure Net Capital and Regulatory Requirements Regulatory Capital Requirements under Banking Regulations [Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Range $1.35 - $2.38 Range One [Member] Range One. Range $10.30 - $19.74 Range Two [Member] Range Two. Range $21.60 - $22.08 Range Three [Member] Range Three. Range $23.02 - $29.99 Range Four [Member] Range Four. Range $30.00 - $34.79 Range Five [Member] Range Five. Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Summary of information about outstanding stock options and warrants Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract] Total Number of Shares, Outstanding Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Range of Exercise Prices, Minimum Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of Exercise Prices, Maximum Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Weighted-Average Remaining Life, Outstanding Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted-Average Exercise Price, Outstanding Number of Shares, Exercisable Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted-Average Exercise Price, Exercisable Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Receivables from Product Sponsors, Broker-Dealers and Clearing Organizations and Payables to Broker-Dealers and Clearing Organizations Receivables From And Payable To Broker Dealers And Clearing Organizations Disclosure [Text Block] Receivables from and payable to broker dealers and clearing organizations disclosure. Summary of provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Summary of company's effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Components of the net deferred tax liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of gross unrecognized tax benefits including interest and penalties reconciliation Summary of Income Tax Contingencies [Table Text Block] Receivables from Product Sponsors, Broker-Dealers and Clearing Organizations and Payables to Broker-Dealers and Clearing Organizations Schedule of Due to (from) Broker-Dealers and Clearing Organizations [Table Text Block]