Unaudited Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 301,951	$ 279,836
Cost of sales	163,276	156,604
Gross profit	138,675	123,232
Selling, general and administrative expenses	66,311	59,756
Operating income	72,364	63,476
Interest expense, net	3,066	3,637
Income before income taxes	69,298	59,839
Provision for income taxes	25,208	22,506
Net income	$ 44,090	$ 37,333
Basic net income per common share (in usd per share)	$ 0.22	$ 0.19
Diluted net income per common share (in usd per share)	$ 0.22	$ 0.19
Basic weighted average shares	196,621,906	196,217,311
Diluted weighted average shares	199,524,913	198,160,465