CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 612,324	$ 553,552
Cost of sales	335,672	302,611
Gross profit	276,652	250,941
Selling, general and administrative expenses	138,327	130,473
Restructuring expenses	1,642	4,797
Operating income	136,683	115,671
Other (income) expense - net	(4,449)	(308)
Interest expense	11,000	11,552
Income before income taxes	130,132	104,427
Provision for income taxes	31,174	28,528
Net income	$ 98,958	$ 75,899
Basic earnings per common share (in dollars per share)	$ 1.29	$ 0.99
Diluted earnings per common share (in dollars per share)	$ 1.27	$ 0.99
Share data:
Basic weighted average common shares outstanding (in shares)	76,419	76,115
Diluted weighted average common shares outstanding (in shares)	77,739	76,894