Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net income (loss)	$ 47,044	$ 78,636
Adjustments to reconcile consolidated net income (loss) to net cash provided by (used in) operating activities:
Fixed asset depreciation and intangible asset amortization	37,154	43,327
Employee loan amortization and reserves on employee loans	24,387	34,687
Equity-based compensation and allocations of net income to limited partnership units and FPUs	104,009	91,785
Deferred compensation expense	62	289
Losses (gains) on equity method investments	(5,532)	(2,855)
Losses (gains) on marketable securities and other investments	(1,810)	77
Amortization of discount (premium) on notes payable	1,396	1,967
Impairment of fixed assets, intangible assets and investments	5,226	3,272
Deferred tax provision (benefit)	653	(4,401)
Change in estimated acquisition earn-out payables	(454)	1,940
Forfeitures of Class A common stock	(17)	(330)
Other	823	(1,934)
Consolidated net income (loss), adjusted for non-cash and non-operating items	212,941	246,460
Decrease (increase) in operating assets:
Securities owned	2,319	9,730
Receivables from broker-dealers, clearing organizations, customers and related broker-dealers	(1,576,645)	(1,151,410)
Accrued commissions receivable, net	(14,362)	(160,613)
Loans, forgivable loans and other receivables from employees and partners, net	(34,701)	(12,400)
Receivables from related parties	(3,652)	3,162
Other assets	(9,878)	(9,955)
Increase (decrease) in operating liabilities:
Repurchase agreements	900	0
Accrued compensation	(21,387)	(16,973)
Payables to broker-dealers, clearing organizations, customers and related broker-dealers	1,516,012	1,126,168
Payables to related parties	36,331	43,480
Accounts payable, accrued and other liabilities	(53,910)	120,697
Net cash provided by (used in) operating activities	53,968	198,346
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of fixed assets	(3,444)	(5,912)
Capitalization of software development costs	(22,445)	(23,895)
Purchase of equity method investments	(466)	(625)
Proceeds from equity method investments	1,534	5,318
Net cash provided by (used in) investing activities	(24,821)	(25,114)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt and collateralized borrowings	(3,177)	(263,102)
Issuance of long-term debt and collateralized borrowings, net of deferred issuance costs	(33)	188,449
Earnings distributions to limited partnership interests and other noncontrolling interests	(16,629)	(34,714)
Redemption and repurchase of limited partnership interests	(26,758)	(39,240)
Dividends to stockholders	(7,443)	(7,626)
Repurchase of Class A common stock	(26,408)	(107,783)
Proceeds from sale of Cantor Units in BGC Holdings	947	5,145
Short term borrowings, net of repayments	0	1,999
Acquisition of Futures Exchange Group	0	3,845
Payments on acquisition earn-outs	(4,384)	(8,139)
Net cash provided by (used in) financing activities	(83,885)	(261,166)
Effect of exchange rate changes on Cash and cash equivalents and Cash segregated under regulatory requirements	(2,920)	478
Net increase (decrease) in Cash and cash equivalents, and Cash segregated under regulatory requirements	(57,658)	(390,134)
Cash and cash equivalents and Cash segregated under regulatory requirements at beginning of period	566,799	853,406
Cash and cash equivalents and Cash segregated under regulatory requirements at end of period	509,141	463,272
Supplemental cash information:
Cash paid during the period for taxes	23,089	21,334
Cash paid during the period for interest	26,419	35,352
Supplemental non-cash information:
Issuance of Class A common stock upon exchange of limited partnership interests	12,779	132,907
Issuance of Class A and contingent Class A common stock and limited partnership interests for acquisitions	2,710	513
ROU assets and liabilities	$ 15,693	$ 0