Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 3,008,652	$ 2,935,586	$ 2,725,053
Gross profit	1,741,211	1,684,378	1,575,751
Research and development	143,950	141,071	128,308
Selling, general and administrative	819,183	812,802	794,861
Amortization	49,690	47,524	42,671
Interest Expense	37,411	34,511	32,785
Restructuring Charges	15,760	18,420	12,772
Other Charges (Income), Net	(6,177)	(21,808)	(9,868)
Earnings Before Taxes	681,394	651,858	574,222
Provision for taxes	120,285	139,247	198,250
Net earnings	$ 561,109	$ 512,611	$ 375,972
Basic earnings per common share:
Net earnings	$ 22.84	$ 20.33	$ 14.62
Weighted average number of common shares	24,567,609	25,215,674	25,713,575
Diluted earnings per common share:
Net earnings	$ 22.47	$ 19.88	$ 14.24
Weighted average number of common and common equivalent shares	24,974,457	25,781,324	26,393,783
Product [Member]
Revenues	$ 2,346,845	$ 2,300,075	$ 2,135,051
Cost of Sales	929,669	914,086	831,355
Service [Member]
Revenues	661,807	635,511	590,002
Cost of Sales	$ 337,772	$ 337,122	$ 317,947