Summary Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	As of December 31, 2014
	First Quarter		Second Quarter			Third Quarter		Fourth Quarter
	(unaudited, dollars in thousands, except for per share data)
Net sales	$	365,390	$	403,000		$	380,120	$	350,570
Gross profit	95,940		109,420			98,050		81,530
Income from continuing operations	19,230		26,430			18,390		2,680
Income (loss) from discontinued operations, net of income taxes	150		(230		)	3,840		(1,210		)
Net income	19,380		26,200			22,230		1,470
Less: Net income attributable to noncontrolling interests	810		—			—		—
Net income attributable to TriMas Corporation	18,570		26,200			22,230		1,470
Earnings (loss) per share attributable to TriMas Corporation—basic:
Continuing operations	$	0.41	$	0.59		$	0.41	$	0.06
Discontinued operations	—		(0.01		)	0.08		(0.03		)
Net income per share	$	0.41	$	0.58		$	0.49	$	0.03
Weighted average shares—basic	44,768,594		44,901,090			44,919,340		44,938,675
Earnings (loss) per share attributable to TriMas Corporation—diluted:
Continuing operations	$	0.41	$	0.59		$	0.41	$	0.06
Discontinued operations	—		(0.01		)	0.08		(0.03		)
Net income per share	$	0.41	$	0.58		$	0.49	$	0.03
Weighted average shares—diluted	45,186,114		45,230,862			45,276,199		45,384,460

	As of December 31, 2013
	First Quarter		Second Quarter		Third Quarter			Fourth Quarter
	(unaudited, dollars in thousands, except for per share data)
Net sales	$	335,750	$	377,750	$	354,910		$	320,190
Gross profit	82,930		103,250		94,110			70,770
Income from continuing operations	13,970		27,290		30,250			7,440
Income (loss) from discontinued operations, net of income taxes	70		510		(300		)	840
Net Income	14,040		27,800		29,950			8,280
Less: Net income (loss) attributable to noncontrolling interests	860		910		1,320			1,430
Net income attributable to TriMas Corporation	13,180		26,890		28,630			6,850
Earnings (loss) per share attributable to TriMas Corporation—basic:
Continuing Operations	$	0.34	$	0.67	$	0.72		$	0.13
Discontinued Operations	$	—	$	0.01	$	(0.01	)	$	0.02
Net income per share	$	0.34	$	0.68	$	0.71		$	0.15
Weighted average shares—basic	39,234,780		39,425,471		40,345,828			44,698,948
Earnings (loss) per share attributable to TriMas Corporation—diluted:
Continuing Operations	$	0.33	$	0.66	$	0.71		$	0.13
Discontinued Operations	$	—	$	0.01	$	(0.01	)	$	0.02
Net income per share	$	0.33	$	0.67	$	0.70		$	0.15
Weighted average shares—diluted	39,790,524		39,886,593		40,746,503			45,159,205