CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 553,552	$ 502,572
Cost of sales	302,611	279,237
Gross profit	250,941	223,335
Selling, general and administrative expenses	130,473	119,990
Restructuring expenses	4,797	0
Operating income	115,671	103,345
Other (income) expense - net	(308)	44
Interest expense	11,552	10,489
Income before income taxes	104,427	92,812
Provision for income taxes	28,528	24,682
Net income	$ 75,899	$ 68,130
Basic earnings per common share (in dollars per share)	$ 0.99	$ 0.90
Diluted earnings per common share (in dollars per share)	$ 0.99	$ 0.89
Share data:
Basic weighted average common shares outstanding (in shares)	76,115	75,749
Diluted weighted average common shares outstanding (in shares)	76,894	76,699