Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net (loss) income	$ (156,594)	$ 450,802	$ 204,017
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	39,969	25,871	19,369
Provision for doubtful accounts	4,214	1,453	3,385
Share-based compensation	61,140	36,011	18,588
Fair value adjustments	34,871	(7,562)	21,954
Non-cash interest and other	(3,204)	(22,322)	(16,810)
Effect of foreign currency on operations	754	127	(460)
(Income) loss from equity method investments	(3,570)	(2,801)	623
Dividends from equity method investments	4,038	2,136	1,343
Deferred income taxes	(80,431)	61,770	61,619
Impairment of leaseholds and intangibles, lease loss accrual, and gain (loss) on disposal of fixed assets	4,922	(137)	14,107
Change in fair value of financial instruments and other	0	(6,509)	0
(Gain) loss on extinguishment of debt	(1,102)	6,131	(1,556)
Gain on equity method investment	(6,790)	(3,544)	0
De-consolidation of BRPM 150	(8,294)	0	0
Income allocated and fair value adjustment for mandatorily redeemable noncontrolling interests	1,119	857	1,230
Change in operating assets and liabilities:
Amounts due to/from clearing brokers	(69,172)	40,628	30,401
Securities and other investments owned	390,635	(581,785)	(331,759)
Securities borrowed	(252,361)	(1,325,509)	48,873
Accounts receivable and advances against customer contracts	6,599	(715)	18,776
Prepaid expenses and other assets	(54,273)	(3,737)	10,135
Accounts payable, accrued payroll and related expenses, accrued expenses and other liabilities	(141,328)	37,798	31,301
Amounts due to/from related parties and partners	3,925	(1,415)	3,423
Securities sold, not yet purchased	(22,726)	18,011	(31,715)
Deferred revenue	8,966	(3,540)	1,530
Securities loaned	245,346	1,328,875	(50,685)
Net cash provided by operating activities	6,653	50,894	57,689
Cash flows from investing activities:
Purchases of loans receivable	(503,146)	(738,909)	(207,466)
Repayments of loans receivable	574,854	172,119	90,083
Sale of loan receivable to related party	0	0	1,800
Proceeds from loan participations sold	0	0	6,900
Repayment of loan participations sold	0	(15,216)	(2,233)
Acquisition of businesses, net of $50,733 and $34,942 cash acquired in 2022 and 2021, respectfully	(261,693)	(28,254)	(1,500)
Purchases of property, equipment and intangible assets	(3,918)	(676)	(2,045)
Proceeds from sale of property, equipment and intangible assets	2	14	1
Funds received from trust account of subsidiary	172,584	0	320,500
Investment of subsidiaries initial public offering proceeds into trust account	0	(345,000)	(176,750)
Purchases of equity method investments	(10,974)	(612)	(7,500)
Net cash (used in) provided by investing activities	(32,291)	(956,534)	21,790
Cash flows from financing activities:
Proceeds from revolving line of credit, net	64,878	80,000	0
Repayment of asset based credit facility	(17,200)		(37,096)
Repayment of notes payable	(530)	(37,610)	(357)
Payment of participating note payable and contingent consideration	(1,776)	(3,714)	(4,250)
Proceeds from term loan	324,200	300,000	75,000
Repayment of term loan	(96,228)	(20,684)	(67,266)
Proceeds from issuance of senior notes	51,601	1,249,083	186,796
Redemption of senior notes	0	(507,348)	(1,829)
Payment of debt issuance and offering costs	(8,222)	(33,377)	(9,845)
Payment for contingent consideration	1,776	3,714	4,250
ESPP and payment of employment taxes on vesting of restricted stock	(10,286)	(9,620)	(22,578)
Common dividends paid	(119,454)	(347,135)	(38,792)
Preferred dividends paid	(8,008)	(7,457)	(4,710)
Repurchase of common stock	(6,516)	(2,656)	(48,248)
Distribution to noncontrolling interests	(4,208)	(16,542)	(3,826)
Contributions from noncontrolling interests	21,096	13,680	604
Redemption of subsidiary temporary equity and distributions	(172,584)		(318,750)
Contributions from noncontrolling interests	0	345,000	175,000
Proceeds from offering common stock	0	64,713	0
Proceeds from offering preferred stock	874	14,712	39,455
Net cash provided by (used in) financing activities	17,637	1,081,045	(80,692)
(Decrease) increase in cash, cash equivalents and restricted cash	(8,001)	175,405	(1,213)
Effect of foreign currency on cash, cash equivalents and restricted cash	(933)	(382)	1,311
Net (decrease) increase in cash, cash equivalents and restricted cash	(8,934)	175,023	98
Cash, cash equivalents and restricted cash, beginning of year	279,860	104,837	104,739
Cash, cash equivalents and restricted cash, end of year	270,926	279,860	104,837
Supplemental disclosures:
Interest paid	193,387	138,369	98,595
Taxes paid	$ 49,357	$ 88,153	$ 2,368