Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income	$ 14,040	$ 12,250
Other comprehensive income
Amortization of defined benefit plan deferred losses, net of tax	200	120
Foreign currency translation	(2,140)	4,510
Net changes in unrealized loss on derivative instruments, net of tax	680	(410)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	770
Total other comprehensive income (loss)	(1,260)	4,220
Total comprehensive income	12,780	16,470
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	860	(240)
Total comprehensive income attributable to TriMas Corporation	$ 11,920	$ 16,710