Interim Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 731,366	$ 721,996	$ 1,410,818	$ 1,382,817
Gross profit	419,538	412,625	807,857	787,558
Research and development	36,582	35,315	72,635	70,028
Selling, general and administrative	205,215	208,024	409,640	408,698
Amortization	12,326	11,970	24,548	23,705
Interest expense	8,882	8,309	17,976	16,668
Restructuring Charges	2,891	7,321	4,414	11,734
Other charges (income), net	(1,574)	(1,916)	(2,248)	(4,316)
Earnings before taxes	155,216	143,602	280,892	261,041
Provision for taxes	28,056	32,134	41,927	56,269
Net earnings	$ 127,160	$ 111,468	$ 238,965	$ 204,772
Basic earnings per common share:
Net earnings	$ 5.15	$ 4.41	$ 9.65	$ 8.07
Weighted average number of common shares	24,698,032	25,299,414	24,774,262	25,383,402
Diluted earnings per common share:
Net earnings	$ 5.06	$ 4.31	$ 9.48	$ 7.88
Weighted average number of common and common equivalent shares	25,118,352	25,867,383	25,217,359	25,979,508
Comprehensive Income, Net of Tax (Note 10)	$ 115,481	$ 82,263	$ 239,946	$ 204,457
Product [Member]
Revenues	565,927	562,476	1,090,274	1,073,422
Cost of Goods and Services Sold	226,816	221,729	437,032	424,316
Service [Member]
Revenues	165,439	159,520	320,544	309,395
Cost of Goods and Services Sold	$ 85,012	$ 87,642	$ 165,929	$ 170,943