Quarterly Unaudited Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 282,093	$ 304,994	$ 253,171	$ 200,615	$ 201,994	$ 234,101	$ 234,960	$ 191,032	$ 1,040,873	$ 862,087	$ 827,567
Gross profit	51,546	61,396	44,119	29,915	28,480	41,578	40,123	29,864	186,976	140,045	158,097
Income (loss) from operations:	4,520	23,394	11,201	8,970	(103,872)	18,392	14,730	333	48,085	(70,417)	21,480
Interest expense	3,614	3,878	3,811	3,700	3,433	3,657	3,691	3,640	15,003	14,421	22,489
Income (loss) from continuing operations	220	13,632	4,087	5,537	(95,708)	9,571	6,431	(2,086)	23,476	(81,792)	(5,629)
Loss from discontinued operations	0	0	0	(28)	(1)	(31)	0	0	(28)	(32)	(4)
Net income (loss)	$ 220	$ 13,632	$ 4,087	$ 5,509	$ (95,709)	$ 9,540	$ 6,431	$ (2,086)	$ 23,448	$ (81,824)	$ (5,633)
(Loss) income per share from continuing operations:
Basic (in dollars per share)	$ 0.01	$ 0.44	$ 0.13	$ 0.18	$ (3.08)	$ 0.31	$ 0.21	$ (0.07)	$ 0.75	$ (2.63)	$ (0.18)
Diluted (in dollars per share)	0.01	0.43	0.13	0.18	(3.08)	0.31	0.21	(0.07)	0.74	(2.63)	(0.18)
Loss per share from discontinued operations:
Basic (in dollars per share)	0.00	0.00	0.00	0.00	0.00	(0.01)	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	$ (0.01)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00