CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 524,258	$ 514,872
Cost of goods sold	362,100	361,912
Gross profit	162,158	152,960
Operating expenses:
Selling, general and administrative expenses	123,097	117,230
Depreciation and amortization	19,219	20,342
Total operating expenses	142,316	137,572
Income from operations	19,842	15,388
Interest expense	(7,733)	(8,556)
Gain on legal settlement	8,556	0
Other (expense) income, net	(1,022)	41
Income before income taxes	19,643	6,873
Income tax expense	5,267	2,045
Net income from continuing operations	14,376	4,828
Loss on sale of discontinued operations, net of tax	0	(1,346)
Net income	$ 14,376	$ 3,482
Earnings Per Share, Basic and Diluted [Abstract]
Earnings from continuing operations per share - basic	$ 0.33	$ 0.11
Earnings from continuing operations per share - diluted	0.33	0.11
Loss from discontinued operations per share - basic (in dollars per share)	0	(0.03)
Loss from discontinued operations per share - diluted (in dollars per share)	0	(0.03)
Earnings per share - basic (in dollars per share)	0.33	0.08
Earnings per share - diluted (in dollars per share)	$ 0.33	$ 0.08
Weighted average shares outstanding:
Basic (in shares)	43,045,692	42,932,024
Diluted (in shares)	43,542,819	42,944,829
Comprehensive income:
Net income	$ 14,376	$ 3,482
Foreign currency translation adjustment	(7,043)	1,570
Unrealized loss on derivatives, net of taxes of $0.2 million and $1.3 million, respectively	(499)
Unrealized loss on derivatives, net of taxes of $0.2 million and $1.3 million, respectively		(3,496)
Total other comprehensive loss	(7,542)	(1,926)
Total comprehensive income	$ 6,834	$ 1,556