CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Sales
Net Sales	$ 2,487,961,000	$ 2,411,835,000	$ 2,271,026,000
Total net sales	2,487,961,000	2,411,835,000	2,271,026,000
Cost of Revenue [Abstract]
Total cost of sales	1,589,216,000	1,540,574,000	1,470,241,000
Gross profit	898,745,000	871,261,000	800,785,000
Research and development expenses	(72,520,000)	(64,525,000)	(61,393,000)
Selling expenses	(120,861,000)	(126,641,000)	(121,873,000)
General and administrative expenses	(301,411,000)	(306,469,000)	(292,399,000)
Operating income	403,953,000	373,626,000	325,120,000
Interest expense	(31,347,000)	(33,983,000)	(41,471,000)
Other income, net	23,856,000	16,596,000	15,970,000
Earnings before income taxes	396,462,000	356,239,000	299,619,000
Provision for income taxes	(88,879,000)	(80,490,000)	(84,728,000)
Net earnings	$ 307,583,000	$ 275,749,000	$ 214,891,000
Basic earnings per share
Basic earnings per share	$ 7.20	$ 6.28	$ 4.86
Diluted earnings per share
Diluted earnings per share	7.15	6.22	4.80
Dividends per share	$ 0.66	$ 0.60	$ 0.56
Weighted average shares outstanding:
Basic	42,739	43,892	44,182
Diluted	43,016	44,316	44,761
Product [Member]
Net Sales
Net Sales	$ 2,073,530,000	$ 1,993,249,000	$ 1,854,216,000
Cost of Revenue [Abstract]
Cost of Goods and Services Sold	1,329,761,000	1,272,599,000	1,198,881,000
Service [Member]
Net Sales
Net Sales	414,431,000	418,586,000	416,810,000
Cost of Revenue [Abstract]
Cost of Goods and Services Sold	$ 259,455,000	$ 267,975,000	$ 271,360,000