CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Sales
Net sales	$ 571,614	$ 614,880	$ 1,722,892	$ 1,832,190
Total net sales	571,614	614,880	1,722,892	1,832,190
Cost of sales
Total cost of sales	358,793	388,804	1,123,466	1,179,197
Gross profit	212,821	226,076	599,426	652,993
Research and development expenses	17,587	18,362	54,163	54,503
Selling expenses	24,869	28,133	81,650	90,303
General and administrative expenses	77,251	74,012	230,515	224,888
Restructuring Charges	8,541	0	20,730	0
Operating income	84,573	105,569	212,368	283,299
Interest expense	(9,055)	(7,951)	(25,059)	(23,183)
Other income, net	5,417	6,355	6,844	17,704
Earnings from continuing operations before income taxes	80,935	103,973	194,153	277,820
Provision for income taxes	(16,315)	(21,463)	(46,754)	(59,645)
Net earnings	$ 64,620	$ 82,510	$ 147,399	$ 218,175
Basic earnings per share
Basic earnings per share (usd per share)	$ 1.56	$ 1.93	$ 3.52	$ 5.10
Diluted earnings per share
Diluted earnings per share (usd per share)	1.55	1.92	3.49	5.07
Dividends per share	$ 0.17	$ 0.17	$ 0.51	$ 0.49
Weighted average shares outstanding:
Basic (shares)	41,545	42,709	41,926	42,755
Diluted (shares)	41,797	42,995	42,190	43,025
Product [Member]
Product sales	$ 493,398	$ 516,760	$ 1,457,772	$ 1,520,612
Cost of sales
Cost of Goods and Services Sold	305,921	331,793	945,886	986,475
Service [Member]
Net Sales
Net sales	78,216	98,120	265,120	311,578
Cost of sales
Cost of Goods and Services Sold	$ 52,872	$ 57,011	$ 177,580	$ 192,722