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Shareholders' Equity (Narrative) (Details) - USD ($)
$ in Thousands, shares in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]      
Dividends declared $ (148,133) $ (135,138) $ (124,356)
Stock repurchases $ 897,303 $ 170,676 $ 274,333
Share repurchase plan [Member]      
Class of Stock [Line Items]      
Shares repurchased under authorized repurchase programs 17.7 4.5 8.4
Stock repurchases $ 897,300 $ 170,700 $ 274,300
Remaining value of stock repurchase programs authorization 457,600    
Shares withheld to pay taxes [Member]      
Class of Stock [Line Items]      
Stock repurchases $ 10,800 $ 14,900 $ 11,500