Acquisitions - Pro Forma (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Business Combinations [Abstract]
Net sales	$ 323,430	$ 355,620	$ 378,030	$ 337,780	$ 301,040	$ 335,870	$ 338,430	$ 297,570	$ 1,394,860		$ 1,272,910		$ 1,083,960
Business Acquisition, Pro Forma Information
Net Sales									1,280,940	[1]	1,144,020	[1]
Net income attributable to TriMas Corporation									$ 35,850	[1]	$ 54,540	[1]

[1] The supplemental pro forma results reflect certain adjustments, such as adjustments for acquisition costs incurred and purchase accounting adjustments related to step-up in value and subsequent amortization of inventory and intangible assets.