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v3.20.2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Debt Securities, Available-for-sale, Amortized Cost | $ 0 | $ 114,204
Accounts Receivable, Allowances | 10,833 | 7,881
Furniture, Equipment and Leasehold Improvements, Accumulated Depreciation and Amortization | 136,815 | 117,387
Intangible Assets, Accumulated Amortization | $ 8,793 | $ 7,292
Treasury Stock at Cost, shares | 31,409,356 | 29,522,665
Class A [Member] |  |
Common Stock, Par Value (in dollars per share) | $ 0.01 | $ 0.01
Common Stock, Shares Authorized | 1,000,000,000 | 1,000,000,000
Common Stock, Shares, Issued | 72,014,728 | 68,698,675
Common Stock, Shares, Outstanding | 40,605,372 | 39,176,010
Class B [Member] |  |
Common Stock, Par Value (in dollars per share) | $ 0.01 | $ 0.01
Common Stock, Shares Authorized | 1,000,000 | 1,000,000
Common Stock, Shares, Issued | 53 | 84
Common Stock, Shares, Outstanding | 53 | 84

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