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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues $ 3,717,930 $ 3,085,177 $ 3,008,652
Gross profit 2,171,553 1,801,031 1,741,211
Research and development 169,766 140,102 143,950
Selling, general and administrative 943,976 820,221 819,183
Amortization 63,075 56,665 49,690
Interest Expense 43,242 38,616 37,411
Restructuring Charges 5,239 10,516 15,760
Other Charges (Income), Net (3,106) (13,832) (6,177)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (949,361) (748,743) (681,394)
Provision for taxes 180,376 146,004 120,285
Net earnings $ 768,985 $ 602,739 $ 561,109
Basic earnings per common share:      
Net earnings $ 33.25 $ 25.24 $ 22.84
Weighted average number of common shares 23,129,862 23,882,648 24,567,609
Diluted earnings per common share:      
Net earnings $ 32.78 $ 24.91 $ 22.47
Weighted average number of common and common equivalent shares 23,457,630 24,199,230 24,974,457
Product [Member]      
Revenues $ 2,960,615 $ 2,405,172 $ 2,346,845
Cost of Sales 1,181,020 954,697 929,669
Service [Member]      
Revenues 757,315 680,005 661,807
Cost of Sales $ 365,357 $ 329,449 $ 337,772