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Document and Entity Information
Financial Statements
Consolidated Statements of Financial Condition
Consolidated Statements of Financial Condition (Parenthetical)
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income (Loss)
Consolidated Statements of Changes in Equity
Consolidated Statements of Cash Flows
Notes to Financial Statements
Organization and Business
Acquisition
Significant Accounting Policies
Cash Collateral Pledged
Segregated Cash
Investments of Operating Entities and Consolidated Funds
Fair Value Measurements for Operating Entities and Consolidated Funds
Deposits with Clearing Organizations, Brokers and Banks
Receivables from and payables to brokers, dealers and clearing organizations
Receivable from and Payable to Customers
Fixed Assets
Goodwill and Intangibles
Other Assets
Accounts Payable Accrued Expenses and Other Liabilities
Commission Management Payable
Redeemable Non-Controlling Interests in Consolidated Subsidiaries and Funds
Reinsurance
Other Revenues and Expenses
Share-Based Compensation and Employee Ownership Plans
Defined Contribution Plans
Income Taxes
Commitments and Contingencies
Convertible Debt and Notes Payable
Stockholder's Equity
Accumulated Other Comprehensive Income (Loss)
Earnings Per Share
Segment Reporting
Regulatory Requirements
Related Party Transactions
Guarantees and Off-Balance Sheet Arrangements
Subsequent Events
Supplemental Financial Information
Accounting Policies
Significant Accounting Policies - Annual (Policies)
Notes Tables
Acquisition (Tables)
Significant Accounting Policies (Tables)
Investments of Operating Entities and Consolidated Funds - (Tables)
Fair Value Measurements for Operating Entities and Consolidated Funds (Tables)
Receivables from and payables to brokers, dealers and clearing organizations receivables from brokers, dealers, and clearing organization (Tables)
Fixed Assets (Tables)
Goodwill and Intangibles (Tables)
Other Assets (Tables)
Accounts Payable Accrued Expenses and Other Liabilities (Tables)
Redeemable Non-Controlling Interests in Consolidated Subsidiaries and Funds (Tables)
Share-Based Compensation and Employee Ownership Plans (Tables)
Income Taxes (Tables)
Commitments and Contingencies (Tables)
Convertible Debt and Notes Payable (Tables)
Stockholder's Equity (Tables)
Accumulated Other Comprehensive Income (Loss) (Tables)
Earnings Per Share (Tables)
Segment Reporting (Tables)
Regulatory Requirements Regulatory (Tables)
Guarantees and Off-Balance Sheet Arrangements Details (Tables)
Supplemental Financial Information (Tables)
Notes Details
Organization and Business (Details)
Acquisition (Narrative) (Details)
Acquisition (Net assets acquired) (Details)
Acquisition (Intangible Assets) (Details)
Acquisition (Amortization Expense) (Details)
Acquisition (Pro Forma) (Details)
Significant Accounting Policies - Annual (Details)
Cash Collateral Pledged (Details)
Segregated Cash (Details)
Investments of Operating Entities and Consolidated Funds - Securities Owned at Fair Value (Details)
Investments of Operating Entities and Consolidated Funds - Derivatives (Details)
Investments of Operating Entities and Consolidated Funds - Other Investments (Details)
Investments of Operating Entities and Consolidated Funds - Portfolio Funds - (Details)
Investments of Operating Entities and Consolidated Funds - Equity Method Investments - (Details)
Investments of Operating Entities and Consolidated Funds - Securities Sold, Not Yet Purchased (Details)
Investments of Operating Entities and Consolidated Funds - Securities borrowed and securities loaned (Details)
Investments of Operating Entities and Consolidated Funds - Securities loaned transactions by remaining contractual maturity and class of collateral pledged (Details)
Investments of Operating Entities and Consolidated Funds - Variable Interest Entities (Details)
Investments of Operating Entities and Consolidated Funds - Indirect Concentration of the Underlying Investments Held by Consolidated Funds (Details)
Investments of Operating Entities and Consolidated Funds - Merger Master Narrative (Details)
Investments of Operating Entities and Consolidated Funds - Merger Master Derivatives (Details)
Investments of Operating Entities and Consolidated Funds - Caerus Master Narrative (Details)
Fair Value Measurements for Operating Entities and Consolidated Funds Assets and Liabilities at Fair Value on a Recurring Basis (Details)
Fair Value Measurements for Operating Entities and Consolidated Funds Unobservable Input Roll Forward (Details)
Fair Value Measurements for Operating Entities and Consolidated Funds Fair Value Inputs, Unobservable Inputs, Quantitative Information (Details)
Fair Value Measurements for Operating Entities and Consolidated Funds Carrying Value Disclosures (Details)
Deposits with Clearing Organizations, Brokers and Banks (Details)
Receivables from and payables to brokers, dealers and clearing organizations (Details)
Receivable from and Payable to Customers (Details)
Fixed Assets (Details)
Goodwill and Intangibles Schedule of Goodwill by Segment (Details) (Annual)
Goodwill and Intangibles Schedule of Intangible Assets (Details) (Annual)
Goodwill and Intangibles Amortization of Intangible Assets (Details) (Annual)
Goodwill and Intangibles Qtlry (Details)
Other Assets (Details)
Accounts Payable Accrued Expenses and Other Liabilities (Details)
Commission Management Payable (Details)
Redeemable Non-Controlling Interests in Consolidated Subsidiaries and Funds (Details)
Reinsurance (Details)
Share-Based Compensation and Employee Ownership Plans Narrative (Details)
Share-Based Compensation and Employee Ownership Plans Deferred Cash (Details)
Share-Based Compensation and Employee Ownership Plans Stock Options (Details)
Share-Based Compensation and Employee Ownership Plans SARs (Details)
Share-Based Compensation and Employee Ownership Plans Restricted Shares and Restricted Stock Units (Details)
Defined Contribution Plans (Details)
Income Taxes Income Tax Expense (Details)
Income Taxes Income Tax Rate Reconciliation (Details)
Income Taxes Deferred Tax Assets and Liabilities (Details)
Income Taxes Summary of Operating Loss Carryforwards (Details)
Income Taxes Unrecognized Tax Benefits - Annual (Details)
Income Taxes - Tax Cuts and Jobs Act (Details)
Commitments and Contingencies (Details)
Commitments and Contingencies Schedules of Unfunded Commitments (Details)
Convertible Debt and Notes Payable (Details)
Stockholders Equity - Annual (Details)
Accumulated Other Comprehensive Income (Loss) (Details)
Earnings Per Share (Details)
Segment Reporting (Details)
Regulatory Requirements (Details)
Related Party Transactions (Details)
Guarantees and Off-Balance Sheet Arrangements (Details)
Subsequent Events - Narrative (Details)
Supplemental Financial Information (Details)
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Uncategorized Items - cown-20171231.xml
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