CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 624,246	$ 622,888	$ 1,888,576	$ 1,869,572
Cost of sales	342,268	342,655	1,030,427	1,025,320
Gross profit	281,978	280,233	858,149	844,252
Selling, general and administrative expenses	128,257	130,479	399,237	406,354
Restructuring expenses	11,956	4,621	14,082	8,251
Operating income	141,765	145,133	444,830	429,647
Other (income) expense - net	1,219	934	701	(3,565)
Interest expense	11,330	10,958	33,262	33,098
Income before income taxes	129,216	133,241	410,867	400,114
Provision for income taxes	24,022	26,889	82,196	87,678
Net income	$ 105,194	$ 106,352	$ 328,671	$ 312,436
Basic earnings per common share (in dollars per share)	$ 1.39	$ 1.39	$ 4.34	$ 4.07
Diluted earnings per common share (in dollars per share)	$ 1.37	$ 1.37	$ 4.30	$ 4.02
Share data:
Basic weighted average common shares outstanding (in shares)	75,698	76,562	75,532	76,507
Diluted weighted average common shares outstanding (in shares)	76,577	77,709	76,415	77,717