Net Income Per Share Attributable to Cooper-Standard Holdings Inc. (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary of Preferred shares (as if converted) and options
Preferred dividends, undistributed earnings and premium allocated to participating securities that would be added back in the diluted calculation	$ 3,587	$ 4,578	$ 26,139	$ 20,300
Maximum [Member]
Summary of Preferred shares (as if converted) and options
Exercise price	$ 46.75		$ 46.75
Minimum [Member]
Summary of Preferred shares (as if converted) and options
Exercise price	$ 43.50		$ 43.50
Exercise Price Upper Range [Member]
Summary of Preferred shares (as if converted) and options
Exercise price		$ 43.50		$ 43.50
Stock Options [Member]
Summary of Preferred shares (as if converted) and options
Antidilutive securities excluded from computation of Earnings Per Share, Amount	272,800	33,700	272,800	33,700
Convertible Preferred Stock [Member]
Summary of Preferred shares (as if converted) and options
Antidilutive securities excluded from computation of Earnings Per Share, Amount	4,099,692	4,381,005	4,076,150	4,381,005