CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 559,911	$ 522,219	$ 1,074,783	$ 985,880
Cost of goods sold	388,374	375,952	750,286	705,176
Gross profit	171,537	146,267	324,497	280,704
Operating expenses:
Selling, general and administrative expenses	122,735	110,153	239,965	214,810
Depreciation and amortization	20,351	18,751	40,693	37,148
Total operating expenses	143,086	128,904	280,658	251,958
Income from operations	28,451	17,363	43,839	28,746
Interest expense	(8,341)	(15,333)	(16,897)	(30,452)
Other income, net	44	61	85	135
Income (loss) before income taxes	20,154	2,091	27,027	(1,571)
Income tax expense (benefit)	5,433	618	7,478	(780)
Income (loss) from continuing operations	14,721	1,473	19,549	(791)
Income from discontinued operations, net of tax	0	3,927	0	5,138
Loss on sale of discontinued operations, net of tax	(44)	0	(1,390)	0
Net income	$ 14,677	$ 5,400	$ 18,159	$ 4,347
Earnings (loss) per share data:
Earnings (Loss) from continuing operations per share - basic (in dollars per share)	$ 0.34	$ 0.03	$ 0.45	$ (0.02)
Earnings (Loss) from continuing operations per share - diluted (in dollars per share)	0.34	0.03	0.45	(0.02)
(Loss) earnings from discontinued operations per share - basic (in dollars per share)	0.00	0.10	(0.03)	0.12
(Loss) earnings from discontinued operations per share - diluted (in dollars per share)	0.00	0.10	(0.03)	0.12
Earnings per share - basic (in dollars per share)	0.34	0.13	0.42	0.10
Earnings per share - diluted (in dollars per share)	$ 0.34	$ 0.13	$ 0.42	$ 0.10
Weighted average shares outstanding:
Basic (in shares)	42,987,915	42,893,498	42,960,124	42,886,867
Diluted (in shares)	43,245,353	42,910,017	43,064,496	42,903,788
Comprehensive income (loss):
Net income	$ 14,677	$ 5,400	$ 18,159	$ 4,347
Foreign currency translation adjustment	1,731	(1,831)	3,301	(4,202)
Unrealized (loss) gain on derivatives, net of taxes of $1.0 million and $0.4 million, respectively and $2.3 million and $1.0 million, respectively	(3,284)	1,096	(6,780)	2,259
Total other comprehensive (loss)	(1,553)	(735)	(3,479)	(1,943)
Total comprehensive income	$ 13,124	$ 4,665	$ 14,680	$ 2,404