CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 25,744	$ 14,464
Non-cash items included in net income:
Depreciation and amortization of furniture, equipment and leasehold improvements	2,643	1,875
Deferred income taxes	3,004	4,562
Amortization of intangible assets	76	0
Amortization of notes receivable	4,426	3,612
Amortization of debt issuance costs	55	56
Write-off of debt issuance costs	0	5
Provision for credit losses	4	(4)
Share-based compensation	1,736	2,000
Amortization of right-of-use lease assets	6,478	6,843
Gain on repurchase of senior secured notes	0	(51)
Decrease (increase) in operating assets:
Deposits with clearing organizations	(15,310)	8,386
Receivable from brokers, dealers and clearing organizations	24,225	(154,962)
Receivable from customers	(119,812)	148,452
Income tax receivable	1,444	(5,374)
Securities purchased under agreements to resell	1,752	0
Securities owned	(248,777)	(263,560)
Notes receivable	(8,675)	(9,766)
Corporate-owned life insurance	(6,252)	(3,884)
Other assets	(18,581)	(34)
Increase (decrease) in operating liabilities:
Drafts payable	12,457	18,024
Payable to brokers, dealers and clearing organizations	135,476	85,964
Payable to customers	78,340	2,113
Securities sold under agreements to repurchase	(353,927)	119,427
Securities sold but not yet purchased	489,256	57,889
Accrued compensation	(93,310)	(81,859)
Income tax payable	6,515	102
Accounts payable and other liabilities	(8,035)	(40,403)
Cash used in operating activities	(79,048)	(86,123)
Cash flows from investing activities
Purchase of furniture, equipment and leasehold improvements	(258)	(3,531)
Proceeds from the settlement of Company-owned life insurance	0	555
Cash used in investing activities	(258)	(2,976)
Cash flows from financing activities
Cash dividends paid on Class A non-voting and Class B voting common stock	(1,576)	(1,674)
Repurchase of Class A non-voting common stock for cancellation	(8,384)	(3,687)
Payments for employee taxes withheld related to vested share-based awards	(6,758)	(5,832)
Redemption of redeemable noncontrolling interests	500	(74)
Repurchase of senior secured notes	0	(1,000)
Increase in bank call loans	94,350	19,300
Cash provided by (used in) financing activities	78,132	7,033
Net decrease in cash, cash equivalents and restricted cash	(1,174)	(82,066)
Cash, cash equivalents and restricted cash, beginning of period	28,835	137,967
Cash, cash equivalents and restricted cash, end of period	27,661	55,901
Reconciliation of cash, cash equivalents and restricted cash within the condensed consolidated balance sheets:
Cash and cash equivalents	27,661	30,320
Restricted cash	0	25,581
Total cash and cash equivalents	27,661	55,901
Schedule of non-cash financing activities
Employee share plan issuance	13,368	8,805
Supplemental disclosure of cash flow information
Cash paid during the period for interest	21,399	14,261
Cash paid during the period for income taxes, net	$ 769	$ 4,238