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Statement of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net earnings $ 768,985 $ 602,739 $ 561,109
Foreign currency translation adjustment 11,535 29,914 2,898
Unrealized gains (losses) on cash flow hedging arrangements:      
Unrealized gains (losses) 4,394 (11,323) (1,063)
Effective portion of (gains) losses included in net earnings (2,913) 11,066 (861)
Defined benefit pension and post-retirement plans:      
Net actuarial gains (losses) 19,293 (35,662) (32,699)
Plan amendments and prior service cost 18,831 (93) 430
Amortization of actuarial (gains) losses and plan amendments and prior service cost 19,326 14,547 12,144
Impact of foreign currency 9,235 (19,701) (2,108)
Total other comprehensive income (loss), net of tax 79,701 (11,252) (21,259)
Total other comprehensive income (loss), net of tax $ 848,686 $ 591,487 $ 539,850