CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 281,160	$ 295,949
Cost of sales	146,998	158,334
Gross profit	134,162	137,615
Selling, general and administrative expenses	113,350	105,037
Income from operations	20,812	32,578
Foreign currency losses, net	(231)	(1,217)
Interest income	97	195
Interest expense	(1,921)	(1,817)
Other income, net	21	590
Income before income taxes	18,778	30,329
Income tax expense	7,687	5,619
Net income	$ 11,091	$ 24,710
Net income per common share:
Basic (in dollars per share)	$ 0.16	$ 0.34
Diluted (in dollars per share)	$ 0.16	$ 0.33
Weighted average common shares outstanding:
Basic (in shares)	67,931	73,009
Diluted (in shares)	69,218	74,875