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Earnings per Share link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - Net Capital and Regulatory Requirements link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - Financial Instruments with Off-Balance-Sheet Credit Risk and Concentrations of Credit Risk link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - Subsequent Event link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - 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Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - Stockholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Earnings per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Financial Services, Brokers and Dealers (Tables) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Organization and Description of the Company (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Summary of Significant Accounting Policies Related Party (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Summary of Significant Accounting Policies Reportable Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Summary of Significant Accounting Policies Share-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Summary of Significant Accounting Policies Cash and Cash Equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Summary of Significant Accounting Policies Cash Segregated Under Federal and Other Regulations (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Summary of Significant Accounting Policies Receivables From and Payables to Clients (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Summary of Significant Accounting Policies Receivables from Advisor (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Summary of Significant Accounting Policies Receivables From Others (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Summary of Significant Accounting Policies Securities Borrowed (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - Summary of Significant Accounting Policies Fixed Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - Summary of Significant Accounting Policies Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - Summary of Significant Accounting Policies Goodwill and Other Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - Summary of Significant Accounting Policies - Captive (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - Revenue Commission Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - Revenue Asset-Based Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - Revenue Transaction and Fee Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - Revenue Unearned Revenue (Details Texturals) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - Fair Value Measurements (Contingent Consideration) (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - Fair Value Measurements - Measured on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - Fair Value Measurements - Not Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - Investment Securities - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - Investment Securities - Held to Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - Investment Securities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - Receivables from Product Sponsors, Broker-Dealers and Clearing Organizations and Payables to Broker-Dealers and Clearing Organizations (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Fixed Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - Fixed Assets (Details Textuals) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - Goodwill and Other Intangible Assets (Details Textuals) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - Goodwill and Other Intangible Assets Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - Intangible Assets (Components) (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - Intangible Assets (Future Amortization Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - Other Assert and Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - Corporate Debt and Other Borrowings, Net - Credit Agreement Outstanding Balance (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - Corporate Debt and Other Borrowings, Net (Other Borrowings Outstanding) (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - Corporate Debt and Other Borrowings, Net - Credit Agreement Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - Corporate Debt and Other Borrowings, Net - Senior Notes Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - Corporate Debt and Other Borrowings, Net - 2028 Senior Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - Corporate Debt and Other Borrowings, Net - Broker-Dealer Revolving Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - Corporate Debt and Other Borrowings, Net - Bank Loans Payable Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - Corporate Debt and Other Borrowings, Net - Letters of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - Corporate Debt and Other Borrowings, Net - Future Payments and Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Leases - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - Leases - Supplemental Weighted-Average Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - Leases - Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - Income Taxes (Provision for Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9954537 - Disclosure - Income Taxes (Reconciliation to Effective Rate) (Details) link:presentationLink link:calculationLink link:definitionLink 9954538 - Disclosure - Income Taxes (Deferred Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 9954539 - Disclosure - Income Taxes (Gross Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 9954540 - 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Stockholders' Equity - Share Repurchases (Details) link:presentationLink link:calculationLink link:definitionLink 9954548 - Disclosure - Share-Based Compensation Stock Option and Warrant Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954549 - Disclosure - Share-Based Compensation Stock Option and Warrant Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9954550 - Disclosure - Share-Based Compensation Outstanding Stock Options and Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 9954551 - Disclosure - Share-Based Compensation Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9954552 - Disclosure - Share-Based Compensation (Details Textuals) link:presentationLink link:calculationLink link:definitionLink 9954553 - Disclosure - Share-Based Compensation - Employee Incentive and Benefit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9954554 - Disclosure - Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9954555 - Disclosure - Earnings per Share (Details Textuals) link:presentationLink link:calculationLink link:definitionLink 9954556 - Disclosure - Net Capital and Regulatory Requirements (Details) link:presentationLink link:calculationLink link:definitionLink 9954557 - Disclosure - Subsequent Event (Details) link:presentationLink link:calculationLink link:definitionLink