CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 542,273	$ 467,891	$ 1,528,153	$ 1,346,441
Cost of goods sold	388,236	332,008	1,093,412	957,404
Gross profit	154,037	135,883	434,741	389,037
Operating expenses:
Selling, general and administrative	113,279	102,259	328,088	299,298
Depreciation and amortization	19,771	18,234	56,922	52,662
Total operating expenses	133,050	120,493	385,010	351,960
Income from operations	20,987	15,390	49,731	37,077
Loss on extinguishment of debt	(58,475)		(58,475)
Interest expense	(12,576)	(15,054)	(43,028)	(45,147)
Other (expense) income, net	(8)	25	126	13,424
(Loss) income before income taxes	(50,072)	361	(51,646)	5,354
Income tax (benefit) expense	(12,519)	239	(13,299)	2,205
(Loss) income from continuing operations	(37,553)	122	(38,347)	3,149
Income from discontinued operations, net of tax	2,772	1,277	7,913	3,439
Net (loss) income	$ (34,781)	$ 1,399	$ (30,434)	$ 6,588
(Loss) earnings per share data:
(Loss) earnings from continuing operations per share - basic	$ (0.88)	$ 0.00	$ (0.89)	$ 0.08
(Loss) earnings from continuing operations per share - diluted	(0.88)	0.00	(0.89)	0.08
Earnings from discontinued operations per share - basic	0.07	0.03	0.18	0.08
Earnings from discontinued operations per share - diluted	0.07	0.03	0.18	0.08
(Loss) earnings per share - basic	(0.81)	0.03	(0.71)	0.16
(Loss) earnings per share - diluted	$ (0.81)	$ 0.03	$ (0.71)	$ 0.16
Weighted average shares outstanding:
Basic (in shares)	42,894,474	42,865,407	42,889,430	41,021,808
Diluted (in shares)	42,917,230	42,870,391	42,905,273	41,023,935
Comprehensive (loss) income:
Net (loss) income	$ (34,781)	$ 1,399	$ (30,434)	$ 6,588
Foreign currency translation adjustment	1,481	3,037	(2,724)	5,695
Unrealized (loss) gain on derivative, net of taxes of $0.5 million and $1.0 million, respectively and $0.5 million and $1.9 million, respectively	(1,420)	(1,647)	839	(3,047)
Total other comprehensive income (loss)	61	1,390	(1,885)	2,648
Total comprehensive (loss) income	$ (34,720)	$ 2,789	$ (32,319)	$ 9,236