CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 479,457	$ 244,605
Cost of goods sold (exclusive of amortization and depreciation)	339,546	172,360
Gross profit	139,911	72,245
Operating expenses:
Selling, general and administrative expenses	113,062	56,771
Depreciation and amortization	18,396	9,613
Total operating expenses	131,458	66,384
Income from operations	8,453	5,861
Interest expense	(15,249)	(8,036)
Other income, net	13,289	10
Income (loss) before income taxes	6,493	(2,165)
Income tax expense (benefit)	2,564	(904)
Net income (loss)	$ 3,929	$ (1,261)
Earnings (loss) per share data:
Basic (in dollars per share)	$ 0.11	$ (0.04)
Diluted (in dollars per share)	$ 0.11	$ (0.04)
Weighted average shares outstanding:
Basic (in shares)	37,273,156	29,974,239
Diluted (in shares)	37,273,156	29,974,239