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Condensed Consolidated Statements of Financial Condition (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Investment Securities and Certificates of Deposit, amortized cost $ 716,614 $ 813,507
Accounts Receivable, allowances 2,164 2,253
Furniture, Equipment and Leasehold Improvements, accumulated depreciation and amortization $ 166,598 $ 151,455
Treasury Stock, Common, Shares (in shares) 48,563,741 46,651,572
Class A    
Common Stock, Par Value (in dollars per share) $ 0.01 $ 0.01
Common Stock, Shares Authorized (in shares) 1,000,000,000 1,000,000,000
Common Stock, Shares, Issued (in shares) 87,122,217 84,767,922
Common Stock, Shares, Outstanding (in shares) 38,558,476 38,116,350
Class B    
Common Stock, Par Value (in dollars per share) $ 0.01 $ 0.01
Common Stock, Shares Authorized (in shares) 1,000,000 1,000,000
Common Stock, Shares, Issued (in shares) 46 45
Common Stock, Shares, Outstanding (in shares) 46 45