CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Loans to Parent	Accumulated Other Comprehensive Income (Loss)	Advantage Solutions Inc. Stockholders' Equity	Nonredeemable noncontrolling Interests
Balance at Dec. 31, 2020	$ 2,518,789	$ 32		$ 3,348,546	$ (921,101)	$ (6,316)	$ 674	$ 2,421,835	$ 96,954
Balance, Shares at Dec. 31, 2020		318,425,182
Net income (loss)	5,222				6,005			6,005	(783)
Foreign currency translation adjustments	(2,287)						(1,796)	(1,796)	(491)
Total comprehensive income (loss)	2,935							4,209	(1,274)
Loans to Karman Topco L.P.	(12)					(12)		(12)
Redemption of noncontrolling interest	(200)			(436)				(436)	236
Equity-based compensation of Karman Topco L.P.	(7,110)			(7,110)				(7,110)
Shares issued upon vesting of restricted stock units, Shares		41,424
Shares issued upon exercise of warrants	58			58				58
Shares issued upon exercise of warrants, Shares		5,000
Shares issued under 2020 Incentive Award Plan, Shares		24,784
Stock-based compensation expense	20,204			20,204				20,204
Balance at Jun. 30, 2021	2,534,664	$ 32		3,361,262	(915,096)	(6,328)	(1,122)	2,438,748	95,916
Balance, Shares at Jun. 30, 2021		318,496,390
Balance at Mar. 31, 2021	2,520,944	$ 32		3,354,383	(921,217)	(6,322)	(1,746)	2,425,130	95,814
Balance, Shares at Mar. 31, 2021		318,449,966
Net income (loss)	5,768				6,121			6,121	(353)
Foreign currency translation adjustments	843						624	624	219
Total comprehensive income (loss)	6,611							6,745	(134)
Loans to Karman Topco L.P.	(6)					(6)		(6)
Redemption of noncontrolling interest	(200)			(436)				(436)	236
Equity-based compensation of Karman Topco L.P.	(3,061)			(3,061)				(3,061)
Shares issued upon vesting of restricted stock units, Shares		41,424
Shares issued upon exercise of warrants	58			58				58
Shares issued upon exercise of warrants, Shares		5,000
Stock-based compensation expense	10,318			10,318				10,318
Balance at Jun. 30, 2021	2,534,664	$ 32		3,361,262	(915,096)	(6,328)	(1,122)	2,438,748	95,916
Balance, Shares at Jun. 30, 2021		318,496,390
Balance at Dec. 31, 2021	2,580,401	$ 32	$ (12,567)	3,373,278	(866,607)	(6,340)	(4,479)	2,483,317	97,084
Balance, Shares at Dec. 31, 2021		316,963,552	1,610,014
Net income (loss)	21,162				22,336			22,336	(1,174)
Foreign currency translation adjustments	(17,684)						(11,883)	(11,883)	(5,801)
Total comprehensive income (loss)	3,478							10,453	(6,975)
Loans to Karman Topco L.P.	(11)					(11)		(11)
Equity-based compensation of Karman Topco L.P.	(6,314)			(6,314)				(6,314)
Shares issued under Employee Stock Purchase Plan	1,653			1,653				1,653
Shares issued under Employee Stock Purchase Plan, Shares		242,427
Shares issued under 2020 Incentive Award Plan, Shares		1,259,470
Stock-based compensation expense	22,282			22,282				22,282
Balance at Jun. 30, 2022	2,601,489	$ 32	$ (12,567)	3,390,899	(844,271)	(6,351)	(16,362)	2,511,380	90,109
Balance, Shares at Jun. 30, 2022		318,465,449	1,610,014
Balance at Mar. 31, 2022	2,602,770	$ 32	$ (12,567)	3,379,350	(847,642)	(6,345)	(3,090)	2,509,738	93,032
Balance, Shares at Mar. 31, 2022		318,393,829	1,610,014
Net income (loss)	3,638				3,371			3,371	267
Foreign currency translation adjustments	(16,462)						(13,272)	(13,272)	(3,190)
Total comprehensive income (loss)	(12,824)							(9,901)	(2,923)
Loans to Karman Topco L.P.	(6)					(6)		(6)
Equity-based compensation of Karman Topco L.P.	(3,519)			(3,519)				(3,519)
Shares issued under 2020 Incentive Award Plan, Shares		71,620
Stock-based compensation expense	15,068			15,068				15,068
Balance at Jun. 30, 2022	$ 2,601,489	$ 32	$ (12,567)	$ 3,390,899	$ (844,271)	$ (6,351)	$ (16,362)	$ 2,511,380	$ 90,109
Balance, Shares at Jun. 30, 2022		318,465,449	1,610,014