Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
ASSETS
Cash and cash equivalents	$ 486,224	$ 544,478
Cash segregated under federal regulations	47,514	47,107
Investments, at fair value	166,113	165,260
Accounts receivable, net of allowance of $658 and $982 as of March 31, 2025 and December 31, 2024, respectively	109,171	91,845
Receivables from broker-dealers, clearing organizations and customers	493,613	357,728
Goodwill	236,706	236,706
Intangible assets, net of accumulated amortization	94,430	98,078
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	107,858	107,298
Operating lease right-of-use assets	56,624	58,132
Prepaid expenses and other assets	79,843	82,584
Total assets	1,878,096	1,789,216
Liabilities
Accrued employee compensation	30,912	68,054
Payables to broker-dealers, clearing organizations and customers	318,866	218,845
Income and other tax liabilities	80,987	3,683
Accounts payable, accrued expenses and other liabilities	29,215	37,320
Operating lease liabilities	70,803	72,654
Total liabilities	530,783	400,556
Commitments and Contingencies (Note 13)
Stockholders' equity
Preferred stock	0	0
Common stock	123	123
Additional paid-in capital	348,708	350,701
Treasury stock - Common stock voting, at cost, 3,556,254 shares and 3,374,047 shares as of March 31, 2025 and December 31, 2024, respectively	(370,342)	(333,369)
Retained earnings	1,392,279	1,405,904
Accumulated other comprehensive loss	(23,455)	(34,699)
Total stockholders' equity	1,347,313	1,388,660
Total liabilities and stockholders' equity	1,878,096	1,789,216
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock	$ 0	$ 0