CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 2,351,646	$ 2,494,573	$ 2,483,666
Cost of sales	1,324,222	1,369,539	1,365,771
Gross profit	1,027,424	1,125,034	1,117,895
Selling, general and administrative expenses	494,935	524,987	536,724
Restructuring expenses and asset impairments	11,776	21,044	12,083
Operating income	520,713	579,003	569,088
Other (income) expense - net	5,627	1,759	(3,985)
Interest expense	44,746	44,341	44,134
Income before income taxes	470,340	532,903	528,939
Provision for income taxes	92,562	107,382	118,366
Net income	$ 377,778	$ 425,521	$ 410,573
Earnings per common share:
Basic earnings per common share (in dollar per share)	$ 4.98	$ 5.62	$ 5.36
Diluted earnings per common share (in dollar per share)	$ 4.94	$ 5.56	$ 5.29
Share data:
Basic weighted average common shares outstanding (in shares)	75,741	75,594	76,412
Diluted weighted average common shares outstanding (in shares)	76,400	76,454	77,563