CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 514,872	$ 463,661
Cost of goods sold	361,912	329,224
Gross profit	152,960	134,437
Operating expenses:
Selling, general and administrative expenses	117,230	104,657
Depreciation and amortization	20,342	18,397
Total operating expenses	137,572	123,054
Income from operations	15,388	11,383
Interest expense	(8,556)	(15,119)
Other income, net	41	74
Income (loss) before income taxes	6,873	(3,662)
Income tax expense (benefit)	2,045	(1,398)
Income (loss) from continuing operations	4,828	(2,264)
Income from discontinued operations, net of tax	0	1,211
Loss on sale of discontinued operations, net of tax	(1,346)	0
Net income (loss)	$ 3,482	$ (1,053)
Earnings (loss) per share data:
Earnings (Loss) from continuing operations per share - basic (in dollars per share)	$ 0.11	$ (0.05)
Earnings (Loss) from continuing operations per share - diluted (in dollars per share)	0.11	(0.05)
(Loss) earnings from discontinued operations per share - basic (in dollars per share)	(0.03)	0.03
(Loss) earnings from discontinued operations per share - diluted (in dollars per share)	(0.03)	0.03
Earnings (loss) per share - basic (in dollars per share)	0.08	(0.02)
Earnings (loss) per share - diluted (in dollars per share)	$ 0.08	$ (0.02)
Weighted average shares outstanding:
Basic (in shares)	42,932,024	42,879,874
Diluted (in shares)	42,944,829	42,879,874
Comprehensive income (loss):
Net income (loss)	$ 3,482	$ (1,053)
Foreign currency translation adjustment	1,570	(2,371)
Unrealized (loss) income on derivatives, net of taxes of $1.3 million and $0.5 million, respectively	(3,496)	1,163
Total other comprehensive (loss)	(1,926)	(1,208)
Total comprehensive income (loss)	$ 1,556	$ (2,261)