Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 584,937	$ 404,933	$ 1,663,960	$ 1,179,763
Cost of goods sold	502,282	344,790	1,427,999	1,018,549
Gross profit	82,655	60,143	235,961	161,214
Selling, general and administrative expenses	71,955	59,187	210,377	164,615
Operating profit (loss)	10,700	956	25,584	(3,401)
Interest expense, net	1,598	1,018	4,533	2,661
Income (loss) from continuing operations before income taxes	9,102	(62)	21,051	(6,062)
Income tax expense (benefit)	3,781	421	8,168	(2,230)
Income (loss) from continuing operations	5,321	(483)	12,883	(3,832)
Loss from discontinued operations, net of taxes		(302)		(259)
Net income (loss)	$ 5,321	$ (785)	$ 12,883	$ (4,091)
Basic EPS:
Income (loss) from continuing operations	$ 0.45	$ (0.04)	$ 1.09	$ (0.32)
Loss from discontinued operations, net of taxes		(0.03)		(0.02)
Net income (loss)	0.45	(0.07)	1.09	(0.34)
Diluted EPS:
Income (loss) from continuing operations	0.43	(0.04)	1.04	(0.32)
Loss from discontinued operations, net of taxes		(0.03)		(0.02)
Net income (loss)	$ 0.43	$ (0.07)	$ 1.04	$ (0.34)
Weighted average number of common shares outstanding:
Basic	11,722,000	11,976,000	11,807,000	12,101,000
Diluted	12,503,000	11,976,000	12,398,000	12,101,000