CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sales	$ 928,262	$ 909,145	$ 1,895,653	$ 1,811,196
Cost of products sold	776,897	736,957	1,573,408	1,469,006
Gross profit	151,365	172,188	322,245	342,190
Selling, administration & engineering expenses	76,339	85,515	156,779	172,569
Amortization of intangibles	3,399	3,536	6,805	7,131
Impairment charges	0	0	0	4,270
Restructuring charges	10,013	8,323	17,138	18,311
Operating profit	61,614	74,814	141,523	139,909
Interest expense, net of interest income	(9,973)	(10,293)	(19,773)	(21,532)
Equity in earnings of affiliates	1,248	1,400	2,935	3,075
Loss on refinancing and extinguishment of debt	0	(1,020)	(770)	(1,020)
Other expense, net	(557)	(2,721)	(2,276)	(3,858)
Income before income taxes	52,332	62,180	121,639	116,574
Income tax expense	9,130	20,530	21,021	32,420
Net income	43,202	41,650	100,618	84,154
Net income attributable to noncontrolling interests	(1,325)	(1,194)	(1,949)	(1,992)
Net income attributable to Cooper-Standard Holdings Inc.	$ 41,877	$ 40,456	$ 98,669	$ 82,162
Earnings per share
Basic	$ 2.33	$ 2.26	$ 5.48	$ 4.61
Diluted	$ 2.28	$ 2.14	$ 5.36	$ 4.34