CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 514,881	$ 546,693	$ 1,017,079	$ 1,090,689
Cost of sales	283,266	305,561	559,423	605,137
Gross profit	231,615	241,132	457,656	485,552
Selling, general and administrative expenses	121,706	129,044	245,990	259,629
Operating income	109,909	112,088	211,666	225,923
Other (income) expense — net	827	137	(896)	(707)
Interest expense	10,584	10,405	21,181	20,862
Income before income taxes	98,498	101,546	191,381	205,768
Provision for income taxes	28,913	29,769	55,842	59,443
Net income	$ 69,585	$ 71,777	$ 135,539	$ 146,325
Basic earnings per common share (in dollars per share)	$ 0.89	$ 0.89	$ 1.74	$ 1.81
Diluted earnings per common share (in dollars per share)	$ 0.89	$ 0.88	$ 1.72	$ 1.79
Share data:
Basic weighted average common shares outstanding (in shares)	77,466	80,106	77,731	80,317
Diluted weighted average common shares outstanding (in shares)	78,297	81,149	78,576	81,362