Interim Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 690,673	$ 731,366	$ 1,339,835	$ 1,410,818
Gross profit	397,970	419,538	772,379	807,857
Research and development	31,193	36,582	65,580	72,635
Selling, general and administrative	190,134	205,215	388,878	409,640
Amortization	13,889	12,326	27,887	24,548
Interest expense	9,582	8,882	19,801	17,976
Restructuring Charges	860	2,891	2,765	4,414
Other charges (income), net	(2,943)	(1,574)	(6,286)	(2,248)
Earnings before taxes	155,255	155,216	273,754	280,892
Provision for taxes	28,693	28,056	49,077	41,927
Net earnings	$ 126,562	$ 127,160	$ 224,677	$ 238,965
Basic earnings per common share:
Net earnings	$ 5.29	$ 5.15	$ 9.37	$ 9.65
Weighted average number of common shares	23,940,278	24,698,032	23,984,055	24,774,262
Diluted earnings per common share:
Net earnings	$ 5.22	$ 5.06	$ 9.25	$ 9.48
Weighted average number of common and common equivalent shares	24,228,989	25,118,352	24,291,321	25,217,359
Comprehensive Income, Net of Tax (Note 9)	$ 128,658	$ 115,481	$ 202,745	$ 239,946
Product [Member]
Revenues	537,113	565,927	1,026,447	1,090,274
Cost of Goods and Services Sold	217,008	226,816	408,631	437,032
Service [Member]
Revenues	153,560	165,439	313,388	320,544
Cost of Goods and Services Sold	$ 75,695	$ 85,012	$ 158,825	$ 165,929