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EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Numerator (basic and diluted):    
Net income $ 481,880 $ 501,609
Denominator:    
Denominator for basic earnings per share - weighted-average shares 66,572 70,383
Effect of stock options 618 632
Denominator for diluted earnings per share - weighted-average shares and assumed conversion 67,190 71,015
Earnings per share - basic $ 7.24 $ 7.13
Earnings per share - assuming dilution $ 7.17 $ 7.06
Antidilutive stock options 115 211
Weighted-average exercise price per share of antidilutive stock options $ 657.14 $ 437.90