Quarterly Unaudited Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 231,838	$ 272,734	$ 265,738	$ 237,671	$ 282,093	$ 304,994	$ 253,171	$ 200,615	$ 1,007,981	$ 1,040,873	$ 862,087
Gross profit	53,882	67,887	68,843	54,150	51,546	61,396	44,119	29,915	244,762	186,976	140,045
Income (loss) from operations:	584	26,363	28,416	17,601	4,520	23,394	11,201	8,970	72,964	48,085	(70,417)
Interest expense	3,595	3,625	3,666	3,691	3,614	3,878	3,811	3,700	14,577	15,003	14,421
Income (loss) from continuing operations	(7,708)	13,786	18,612	9,029	220	13,632	4,087	5,537	33,719	23,476	(81,792)
Loss from discontinued operations	(44)	0	0	0	0	0	0	(28)	(44)	(28)	(32)
Net income (loss)	$ (7,752)	$ 13,786	$ 18,612	$ 9,029	$ 220	$ 13,632	$ 4,087	$ 5,509	$ 33,675	$ 23,448	$ (81,824)
(Loss) income per share from continuing operations:
Basic (in dollars per share)	$ (0.24)	$ 0.44	$ 0.59	$ 0.29	$ 0.01	$ 0.44	$ 0.13	$ 0.18	$ 1.07	$ 0.75	$ (2.63)
Diluted (in dollars per share)	(0.24)	0.43	0.58	0.28	0.01	0.43	0.13	0.18	1.05	0.74	(2.63)
Loss per share from discontinued operations:
Basic (in dollars per share)	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Diluted (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Discrete tax benefit									$ (16,264)	$ (13,624)	$ 2,958
Disposal Group, Not Discontinued Operations
Loss per share from discontinued operations:
Discrete tax benefit			$ 4,800