CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 502,572	$ 502,198
Cost of sales	279,237	276,157
Gross profit	223,335	226,041
Selling, general and administrative expenses	120,778	124,284
Operating income	102,557	101,757
Other (income) expense — net	(744)	(1,723)
Interest expense	10,489	10,597
Income before income taxes	92,812	92,883
Provision for income taxes	24,682	26,929
Net income	$ 68,130	$ 65,954
Basic earnings per common share (in dollars per share)	$ 0.90	$ 0.84
Diluted earnings per common share (in dollars per share)	$ 0.89	$ 0.84
Share data:
Basic weighted average common shares outstanding (in shares)	75,749	77,996
Diluted weighted average common shares outstanding (in shares)	76,699	78,856