CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Sales
Sales	$ 621,495	$ 550,047	$ 1,218,554	$ 1,151,278
Cost of sales
Total cost of sales	396,776	364,021	784,078	764,673
Gross profit	224,719	186,026	434,476	386,605
Research and development expenses	23,194	18,269	45,057	36,576
Selling expenses	29,564	25,193	59,160	56,781
General and administrative expenses	77,378	76,606	150,610	153,264
Restructuring Charges	0	10,609	0	12,189
Operating income	94,583	55,349	179,649	127,795
Interest expense	(10,180)	(8,515)	(20,139)	(16,004)
Other income (expense), net	440	(4,105)	5,283	1,427
Earnings before income taxes	84,843	42,729	164,793	113,218
Provision for income taxes	(23,435)	(11,711)	(43,916)	(30,439)
Net earnings	$ 61,408	$ 31,018	$ 120,877	$ 82,779
Basic earnings per share
Basic earnings per share (usd per share)	$ 1.50	$ 0.75	$ 2.95	$ 1.97
Diluted earnings per share
Diluted earnings per share (usd per share)	1.49	0.74	2.94	1.95
Dividends per share	$ 0.18	$ 0.17	$ 0.35	$ 0.34
Weighted average shares outstanding:
Basic (shares)	40,915	41,629	40,921	42,092
Diluted (shares)	41,088	41,855	41,092	42,362
Product [Member]
Net Sales
Sales	$ 515,392	$ 466,445	$ 1,024,367	$ 964,374
Cost of sales
Cost of Goods and Services Sold	331,881	309,152	661,335	639,965
Service [Member]
Net Sales
Sales	106,103	83,602	194,187	186,904
Cost of sales
Cost of Goods and Services Sold	$ 64,895	$ 54,869	$ 122,743	$ 124,708