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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	71,000	0	1,000
Net income attributable to Cooper-Standard Holdings Inc.	$ (267,605)	$ 67,529	$ 103,601
Diluted net income available to Cooper-Standard Holdings Inc. common stockholders	$ (267,605)	$ 67,529	$ 103,601
Basic weighted average shares of common stock outstanding	16,913,850	17,146,124	17,894,718
Dilutive effect of:
Weighted Average Number Diluted Shares Outstanding Adjustment	0	62,644	395,484
Diluted weighted average shares of common stock outstanding	16,913,850	17,208,768	18,290,202
Basic net income per share attributable to Cooper-Standard Holdings Inc. (in dollars per share)	$ (15.82)	$ 3.94	$ 5.79
Diluted net income per share attributable to Cooper-Standard Holdings Inc. (in dollars per share)	$ (15.82)	$ 3.92	$ 5.66