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Basis of Presentation (Earnings per share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Numerator:        
Net income $ 627,928 $ 475,549 $ 1,735,086 $ 1,283,055
Less: earnings distributed to participating securities (202) (296) (635) (887)
Less: undistributed earnings allocated to participating securities (3,534) (3,546) (10,288) (9,559)
Numerator for basic earnings per share 624,192 471,707 1,724,163 1,272,609
Add back: undistributed earnings allocated to participating securities 3,534 3,546 10,288 9,559
Less: undistributed earnings reallocated to participating securities (3,508) (3,536) (10,218) (9,535)
Numerator for diluted earnings per share $ 624,218 $ 471,717 $ 1,724,233 $ 1,272,633
Denominator:        
Basic shares outstanding (shares) 230,967 258,147 237,639 261,854
Effect of dilutive securities (shares) 1,333 752 1,240 668
Diluted shares outstanding (shares) 232,300 258,899 238,879 262,522
Earnings per share:        
Basic earnings (usd per share) $ 2.70 $ 1.83 $ 7.26 $ 4.86
Diluted earnings (usd per share) $ 2.69 $ 1.82 $ 7.22 $ 4.85