Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investment Securities and Certificates of Deposit, amortized cost	$ 877,606	$ 813,507
Accounts Receivable, allowances	2,983	2,253	$ 5,603
Furniture, Equipment and Leasehold Improvements, accumulated depreciation and amortization	170,272	$ 151,455
Intangible Assets, Accumulated Amortization	$ 3,727
Treasury Stock, Common, Shares (in shares)	49,050,030	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)	87,572,820	84,767,922
Common Stock, Shares, Outstanding (in shares)	38,522,790	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)	45	45
Common Stock, Shares, Outstanding (in shares)	45	45