Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
ASSETS
Cash and cash equivalents	$ 396,487	$ 430,746
Cash segregated under federal regulations	52,015	50,947
Investments, at fair value	109,037	83,792
Accounts receivable, net of allowance of $421 and $590 as of June 30, 2023 and December 31, 2022, respectively	92,969	78,450
Receivables from broker-dealers, clearing organizations and customers	479,741	476,335
Goodwill	154,789	154,789
Intangible assets, net of accumulated amortization	89,812	98,065
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	99,022	100,256
Operating lease right-of-use assets	63,674	66,106
Prepaid expenses and other assets	81,645	68,289
Total assets	1,619,191	1,607,775
Liabilities
Accrued employee compensation	35,877	56,302
Payables to broker-dealers, clearing organizations and customers	287,360	303,993
Income and other tax liabilities	18,518	28,448
Accounts payable, accrued expenses and other liabilities	32,422	55,263
Operating lease liabilities	79,922	82,676
Total liabilities	454,099	526,682
Commitments and Contingencies (Note 13)
Stockholders' equity
Preferred stock	0	0
Common stock	123	123
Additional paid-in capital	339,867	345,468
Treasury stock - Common stock voting, at cost, 3,268,584 shares and 3,270,512 shares as of June 30, 2023 and December 31, 2022 respectively	(327,815)	(328,326)
Retained earnings	1,180,820	1,101,525
Accumulated other comprehensive loss	(27,903)	(37,697)
Total stockholders' equity	1,165,092	1,081,093
Total liabilities and stockholders' equity	1,619,191	1,607,775
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock	$ 0	$ 0