Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 36,290	$ 60,360	$ 45,270
Other comprehensive income
Defined pension and postretirement pension plans, net of tax	(2,570)	(3,120)	(720)
Foreign currency translation	3,930	(3,590)	1,690
Net changes in unrealized loss on derivative instruments, net of tax	(1,680)	230	1,430
Total other comprehensive income (loss)	(320)	(6,480)	2,400
Total comprehensive income	35,970	53,880	47,670
Net income attributable to noncontrolling interest	2,410	0	0
Total comprehensive income attributable to TriMas Corporation	$ 33,560	$ 53,880	$ 47,670