Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 1,007,981	$ 1,040,873	$ 862,087
Cost of sales	763,219	853,897	722,042
Gross profit	244,762	186,976	140,045
Selling, general, and administrative expense	161,623	134,028	102,492
Intangible asset impairment	10,175	4,863	107,970
Income (loss) from operations	72,964	48,085	(70,417)
Interest expense	14,577	15,003	14,421
Other expense (income)	8,404	(4,018)	(88)
Income (loss) before taxes	49,983	37,100	(84,750)
Provision for (benefit of) income taxes	16,264	13,624	(2,958)
Income (loss) from continuing operations	33,719	23,476	(81,792)
Discontinued operations:
Loss before taxes	(70)	(44)	(51)
Benefit of income taxes	(26)	(16)	(19)
Loss from discontinued operations	(44)	(28)	(32)
Net income (loss)	$ 33,675	$ 23,448	$ (81,824)
Net earnings per share – Basic:
(Loss) income from continuing operations (in dollars per share)	$ 1.07	$ 0.75	$ (2.63)
Loss from discontinued operations (in dollars per share)	0.00	0.00	0.00
Net (loss) income (in dollars per share)	$ 1.07	$ 0.75	$ (2.63)
Weighted average shares outstanding – Basic (in shares)	31,536	31,233	31,066
Net earnings per share – Diluted:
Income (Loss) from Continuing Operations, Per Diluted Share	$ 1.05	$ 0.74	$ (2.63)
Loss from discontinued operations (in dollars per share)	0.00	0.00	0.00
Net (loss) income (in dollars per share)	$ 1.05	$ 0.74	$ (2.63)
Weighted average shares outstanding – Diluted (in shares)	32,069	31,545	31,066