Net Income Per Share Attributable to Cooper-Standard Holdings Inc -Common stock equivalents (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock Option [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	161,000	131,000	464,504	131,000
Stock Option [Member] | Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price	$ 64.74	$ 52.25	$ 25.52	$ 52.25
Stock Option [Member] | Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price	$ 70.20	$ 52.50	$ 70.20	$ 52.50
Restricted Stock [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	42,717	0
Convertible Preferred Stock [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	3,479,719	0	3,751,800
7% Preferred dividends, undistributed earnings and premium allocated to participating securities that would be added back in the diluted calculation	$ 0	$ 5,460	$ 0	$ 17,670