Condensed Consolidated Statements of Equity (Deficit) - USD ($) $ in Thousands	Total	Other Noncontrolling Subsidiaries	GCM Holdings	Common Stock Class A Common Stock	Common Stock Class C Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests in Subsidiaries	Noncontrolling Interests in GCMH	Noncontrolling Interests in GCMH GCM Holdings
Beginning balance at Dec. 31, 2020	$ (82,190)			$ 4	$ 14	$ 2,705	$ (29,832)	$ (2,233)	$ 94,013	$ (146,861)
Beginning balance at Dec. 31, 2020	115,121
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from noncontrolling interests in subsidiaries	2,058								2,058
Capital contributions from redeemable noncontrolling interest	11
Capital distributions paid to noncontrolling interests and Partners distributions	(17,661)		$ (38,703)						(17,661)		$ (38,703)
Capital distributions paid to redeemable noncontrolling interest		$ (9,036)
Issuance of Class A common stock due to exercised warrants	23,316					5,252				18,064
Deemed contributions	14,929									14,929
Net change in cash flow hedges	1,344							298		1,046
Translation adjustment	(618)							(139)		(479)
Equity-based compensation	32,269					7,309				24,960
Declared dividends	(6,556)						(6,556)
Deferred tax and other tax adjustments	(18)					117		(135)
Net income (loss)	22,012						3,203		20,297	(1,488)
Net income (loss)	19,827
Ending balance at Jun. 30, 2021	(49,818)			4	14	15,383	(33,185)	(2,209)	98,707	(128,532)
Ending balance at Jun. 30, 2021	125,923
Beginning balance at Mar. 31, 2021	(37,204)			4	14	13,920	(33,833)	(1,570)	96,158	(111,897)
Beginning balance at Mar. 31, 2021	117,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from noncontrolling interests in subsidiaries	975								975
Capital contributions from redeemable noncontrolling interest	11
Capital distributions paid to noncontrolling interests and Partners distributions	(10,134)		(27,016)						(10,134)		$ (27,016)
Capital distributions paid to redeemable noncontrolling interest		(3,286)
Deemed contributions	10,026									10,026
Net change in cash flow hedges	(2,335)							(533)		(1,802)
Translation adjustment	(3)									(3)
Equity-based compensation	5,637					1,286				4,351
Declared dividends	(8)						(8)
Deferred tax and other tax adjustments	71					177		(106)
Net income (loss)	10,173						656		11,708	(2,191)
Net income (loss)	11,738
Ending balance at Jun. 30, 2021	(49,818)			4	14	15,383	(33,185)	(2,209)	98,707	(128,532)
Ending balance at Jun. 30, 2021	125,923
Beginning balance at Dec. 31, 2021	(55,801)			4	14	1,501	(26,222)	(1,007)	96,687	(126,778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from noncontrolling interests in subsidiaries	964								964
Capital distributions paid to noncontrolling interests and Partners distributions		(20,393)	(52,139)						(20,393)	(52,139)
Repurchase of Class A common stock	(12,458)					(2,877)				(9,581)
Settlement of equity-based compensation in satisfaction of withholding tax requirements	(592)					(138)				(454)
Deemed contributions	14,142									14,142
Net change in cash flow hedges	26,514							6,170		20,344
Translation adjustment	(2,359)							(546)		(1,813)
Equity-based compensation	14,407					3,345				11,062
Declared dividends	(9,458)						(9,458)
Deferred tax and other tax adjustments	(1,689)					(56)		(1,633)
Equity reallocation between controlling and non-controlling interests	0						949			(949)
Net income (loss)	53,910						12,331		5,680	35,899
Ending balance at Jun. 30, 2022	(44,952)			4	14	1,775	(22,400)	2,984	82,938	(110,267)
Beginning balance at Mar. 31, 2022	(53,301)			4	14	2,859	(26,093)	3,014	91,491	(124,590)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from noncontrolling interests in subsidiaries	777								777
Capital distributions paid to noncontrolling interests and Partners distributions		$ (10,174)	$ (15,738)						(10,174)	(15,738)
Repurchase of Class A common stock	(10,017)					(2,308)				(7,709)
Deemed contributions	7,027									7,027
Net change in cash flow hedges	8,180							1,894		6,286
Translation adjustment	(1,594)							(368)		(1,226)
Equity-based compensation	5,509					1,271				4,238
Declared dividends	(4,697)						(4,697)
Deferred tax and other tax adjustments	(1,603)					(47)		(1,556)
Equity reallocation between controlling and non-controlling interests	0						785			(785)
Net income (loss)	30,679						7,605		844	22,230
Ending balance at Jun. 30, 2022	$ (44,952)			$ 4	$ 14	$ 1,775	$ (22,400)	$ 2,984	$ 82,938	$ (110,267)