Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net income (loss)	$ 21,170	$ 30,701
Adjustments to reconcile consolidated net income (loss) to net cash provided by (used in) operating activities:
Fixed asset depreciation and intangible asset amortization	19,059	18,399
Employee loan amortization and reserves on employee loans	13,900	9,894
Equity-based compensation and allocations of net income to limited partnership units and FPUs	81,373	57,876
Deferred compensation expense	11	30
Losses (gains) on equity method investments	(2,062)	(2,803)
Unrealized/realized losses (gains) on financial instruments owned, at fair value and other investments	1,325	(136)
Amortization of discount (premium) on notes payable	855	700
Impairment of fixed assets, intangible assets and investments	1,770	2,120
Deferred tax provision (benefit)	1,128	1,509
Change in estimated acquisition earn-out payables	674	224
Forfeitures of Class A common stock	(49)	0
Other	0	780
Consolidated net income (loss), adjusted for non-cash and non-operating items	139,154	119,294
Decrease (increase) in operating assets:
Financial instruments owned, at fair value	(1,563)	5,041
Receivables from broker-dealers, clearing organizations, customers and related broker-dealers	(1,291,324)	(1,592,749)
Accrued commissions receivable, net	(36,347)	(45,382)
Loans, forgivable loans and other receivables from employees and partners, net	(44,604)	(16,600)
Receivables from related parties	(2,617)	(2,174)
Other assets	(2,091)	(5,292)
Increase (decrease) in operating liabilities:
Repurchase agreements	0	7,511
Accrued compensation	(5,297)	(8,364)
Payables to broker-dealers, clearing organizations, customers and related broker-dealers	1,270,560	1,546,421
Payables to related parties	(7,220)	23,952
Accounts payable, accrued and other liabilities	5,836	(41,541)
Net cash provided by (used in) operating activities	24,487	(9,883)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of fixed assets	(2,327)	(1,030)
Capitalization of software development costs	(12,210)	(11,042)
Purchase of equity method investments	0	(343)
Proceeds from equity method investments	1,828	77
Payments for acquisitions, net of cash and restricted cash acquired	(26,177)	0
Purchase of assets	(110)	0
Net cash provided by (used in) investing activities	(38,996)	(12,338)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt and collateralized borrowings	(61,621)	(1,584)
Issuance of long-term debt and collateralized borrowings, net of deferred issuance costs	135,000	(6)
Earnings distributions to limited partnership interests and other noncontrolling interests	(14,263)	(6,868)
Redemption and repurchase of limited partnership interests	(34,454)	(11,794)
Dividends to stockholders	(3,739)	(3,710)
Repurchase of Class A common stock	(4,208)	0
Net cash provided by (used in) financing activities	16,715	(23,962)
Effect of exchange rate changes on Cash and cash equivalents and Cash segregated under regulatory requirements	5,704	2,970
Net increase (decrease) in Cash and cash equivalents, and Cash segregated under regulatory requirements	7,910	(43,213)
Cash and cash equivalents and Cash segregated under regulatory requirements at beginning of period	502,010	566,799
Cash and cash equivalents and Cash segregated under regulatory requirements at end of period	509,920	523,586
Supplemental cash information:
Cash paid during the period for taxes	9,593	4,353
Cash paid during the period for interest	14,615	13,283
Supplemental non-cash information:
Issuance of Class A common stock upon exchange of limited partnership interests	31,179	14,809
Issuance of Class A and contingent Class A common stock and limited partnership interests for acquisitions	2,761	1,976
ROU assets and liabilities	$ 1,625	$ 1,686