Consolidated Statement of Shareholders' Equity Statement - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balances at Dec. 31, 2014	$ 590,630	$ 450	$ 806,810	$ (226,850)	$ 10,220
Net income attributable to TriMas Corporation	27,400			27,400
Other comprehensive income (loss)	(11,380)				(11,380)
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(2,620)		(2,620)
Stock option exercises and restricted stock vesting	430	0	430
Excess tax benefits from stock based compensation	300		300
Non-cash compensation expense	5,280		5,280
Distribution of the Cequent businesses	(2,180)			6,130	(8,310)
Balances at Sep. 30, 2015	$ 607,860	$ 450	$ 810,200	$ (193,320)	$ (9,470)