CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 2,494,573	$ 2,483,666	$ 2,287,312
Cost of sales	1,369,539	1,365,771	1,260,634
Gross profit	1,125,034	1,117,895	1,026,678
Selling, general and administrative expenses	524,987	536,724	524,940
Loss (gain) on sale of businesses - net	0	0	(9,273)
Restructuring expenses	21,044	12,083	8,455
Operating income	579,003	569,088	502,556
Other (income) expense - net	1,759	(3,985)	2,394
Interest expense	44,341	44,134	44,889
Income before income taxes	532,903	528,939	455,273
Provision for income taxes	107,382	118,366	118,016
Net income	$ 425,521	$ 410,573	$ 337,257
Earnings per common share:
Basic earnings per common share (in dollar per share)	$ 5.62	$ 5.36	$ 4.41
Diluted earnings per common share (in dollar per share)	$ 5.56	$ 5.29	$ 4.36
Share data:
Basic weighted average common shares outstanding (in shares)	75,594	76,412	76,232
Diluted weighted average common shares outstanding (in shares)	76,454	77,563	77,333