Net Income Per Share Attributable to Cooper-Standard Holdings Inc. - Basic and Diluted Net Income Per Share Attributable (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to Cooper-Standard Holdings Inc.	$ 28,501	$ 24,640	$ 40,456	$ 41,706	$ 31,114	$ 36,362	$ 40,189	$ 31,323	$ 135,303	$ 138,988	$ 111,880
Increase in fair value of share-based awards									0	63	48
Diluted net income available to Cooper-Standard Holdings Inc. common stockholders									$ 135,303	$ 139,051	$ 111,928
Basic weighted average shares of common stock outstanding									17,781,272	17,459,710	17,212,607
Dilutive effect of:
Weighted Average Number Diluted Shares Outstanding Adjustment									995,381	1,270,668	1,202,387
Diluted weighted average shares of common stock outstanding									18,776,653	18,730,378	18,414,994
Basic net income per share attributable to Cooper-Standard Holdings Inc. (in dollars per share)	$ 1.60	$ 1.39	$ 2.26	$ 2.35	$ 1.76	$ 2.08	$ 2.33	$ 1.80	$ 7.61	$ 7.96	$ 6.50
Diluted net income per share attributable to Cooper-Standard Holdings Inc. (in dollars per share)	$ 1.53	$ 1.32	$ 2.14	$ 2.20	$ 1.65	$ 1.94	$ 2.16	$ 1.67	$ 7.21	$ 7.42	$ 6.08