CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive loss [Member]	Accumulated other comprehensive loss [Member] Cumulative Effect, Period of Adoption, Adjustment	Cooper Standard Holdings Inc Equity Deficit [Member]	Cooper Standard Holdings Inc Equity Deficit [Member] Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest [Member]	Cooper Standard Holdings Inc Equity [Member]	LS Mtron Member [Member]	LS Mtron Member [Member] Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2017	$ 852,101		$ 18	$ 512,815	$ 508,722	$ 8,639	$ (197,974)	$ (8,639)	$ 823,581		$ 28,520
Beginning Balance (in shares) at Dec. 31, 2017			17,914,599
Treasury Stock, Shares, Acquired			(549,019)
Treasury Stock, Value, Acquired, Cost Method	(60,566)		$ (1)	(14,259)	(46,306)				(60,566)
Share-based compensation, net (in shares)			189,157
Share-based compensation, net	196		$ 0	5,637	(5,441)				196
Purchase of noncontrolling interest	(2,370)			2,682					2,682		(312)
Contribution from noncontrolling interests	1,377										1,377		$ 6,246	$ 6,246
Dividends paid to noncontrolling interests	(3,614)										(3,614)
Net income (loss)	99,055				103,601				103,601		(4,546)
Other Comprehensive Income (Loss), Net of Tax	(40,950)						(39,324)		(39,324)		(1,626)
Ending Balance at Dec. 31, 2018	851,475	$ (2,607)	$ 17	501,511	569,215	(2,607)	(245,937)		824,806	$ (2,607)	26,669
Ending Balance (in shares) at Dec. 31, 2018			17,554,737
Treasury Stock, Shares, Acquired			(817,954)
Treasury Stock, Value, Acquired, Cost Method	(35,937)		$ 0	(21,459)	(14,478)				(35,937)
Share-based compensation, net (in shares)			105,974
Share-based compensation, net	8,890			9,101	(211)				8,890
Purchase of noncontrolling interest	(4,759)			(1,298)					(1,298)		6,057
Contribution from noncontrolling interests	6,048										6,048
Dividends paid to noncontrolling interests	(1,058)										(1,058)
Net income (loss)	62,213				67,529				67,529		(5,316)
Other Comprehensive Income (Loss), Net of Tax	(8,283)						(7,804)		(7,804)		(479)
Ending Balance at Dec. 31, 2019	$ 875,982	$ (1,573)	$ 17	490,451	619,448	$ (1,573)	(253,741)		856,175	$ (1,573)	19,807
Ending Balance (in shares) at Dec. 31, 2019	16,842,757		16,842,757
Share-based compensation, net (in shares)			54,328
Share-based compensation, net	$ 8,268		$ 0	8,268	0				8,268
Purchase of noncontrolling interest	(2,112)										2,112	$ 0
Net income (loss)	(269,374)				(267,605)				(267,605)		(1,769)
Other Comprehensive Income (Loss), Net of Tax	12,920						11,845		11,845		1,075
Ending Balance at Dec. 31, 2020	$ 624,111		$ 17	$ 498,719	$ 350,270		$ (241,896)		$ 607,110		$ 17,001
Ending Balance (in shares) at Dec. 31, 2020	16,897,085		16,897,085