Consolidated Statement of Shareholders' Equity Statement - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balances at Dec. 31, 2015	$ 547,190	$ 450	$ 812,160	$ (254,120)	$ (11,300)
Net income attributable to TriMas Corporation	18,780			18,780
Other comprehensive income (loss)	(10,730)				(10,730)
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(650)		(650)
Stock option exercises and restricted stock vesting	10	0	10
Tax effect from stock based compensation	(540)		(540)
Non-cash compensation expense	4,140		4,140
Balances at Jun. 30, 2016	$ 558,200	$ 450	$ 815,120	$ (235,340)	$ (22,030)