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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Adjusted Balance
Common Stock (Par Value: $0.01)
Preferred Stock (Par Value: $0.01)
Paid-in Capital in Excess of Par
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings
Adjusted Balance
Treasury Stock, at Cost
Accumulated Other Comprehensive Loss, Net of Tax
Accumulated Other Comprehensive Loss, Net of Tax
Cumulative Effect, Period of Adoption, Adjustment
Balance at Dec. 31, 2017 $ 6,795,376     $ 4,891 $ 502,840 $ 6,072,559 $ 237,868     $ (7,615) $ (15,167)  
Balance (ASU No. 2016-01) at Dec. 31, 2017   $ 260           $ 260        
Balance (ASU No. 2018-02) at Dec. 31, 2017               2,546       $ (2,546)
Balance, shares at Dec. 31, 2017       488,490,352                
Shares issued for restricted stock, net of forfeitures       $ 13   (8,879)       8,866    
Shares issued for restricted stock, net of forfeitures, shares       2,039,603                
Compensation expense related to restricted stock awards 36,260         36,260            
Net income 422,417           422,417          
Dividends paid on common stock ($0.68) (333,061)           (333,061)          
Dividends paid on preferred stock ($63.76) (32,828)           (32,828)          
Purchase of common stock (163,249)                 (163,249)    
Purchase of common stock, shares       (16,993,351)                
Other comprehensive income (loss), net of tax (69,940)                   (69,940)  
Balance at Dec. 31, 2018 6,655,235     $ 4,904 502,840 6,099,940 297,202     (161,998) (87,653)  
Balance, shares at Dec. 31, 2018       473,536,604                
Shares issued for restricted stock, net of forfeitures           (16,501)       16,501    
Shares issued for restricted stock, net of forfeitures, shares       1,665,028                
Compensation expense related to restricted stock awards 32,048         32,048            
Net income 395,043           395,043          
Dividends paid on common stock ($0.68) (317,394)           (317,394)          
Dividends paid on preferred stock ($63.76) (32,828)           (32,828)          
Purchase of common stock (75,220)                 (75,220)    
Purchase of common stock, shares       (7,854,851)                
Other comprehensive income (loss), net of tax 54,810                   54,810  
Balance at Dec. 31, 2019 $ 6,711,694 $ (10,468) [1] $ 6,701,226 $ 4,904 502,840 6,115,487 342,023 $ (10,468) [1] $ 331,555 (220,717) (32,843)  
Balance, shares at Dec. 31, 2019       467,346,781                
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201613Member us-gaap:AccountingStandardsUpdate201613Member           us-gaap:AccountingStandardsUpdate201613Member        
Shares issued for restricted stock, net of forfeitures           (22,198)       22,198    
Shares issued for restricted stock, net of forfeitures, shares       2,321,105                
Compensation expense related to restricted stock awards $ 29,401         29,401            
Net income 511,109           511,109          
Dividends paid on common stock ($0.68) (315,607)           (315,607)          
Dividends paid on preferred stock ($63.76) (32,828)           (32,828)          
Purchase of common stock (59,022)                 (59,022)    
Purchase of common stock, shares       (5,766,078)                
Other comprehensive income (loss), net of tax 7,365                   7,365  
Balance at Dec. 31, 2020 $ 6,841,644     $ 4,904 $ 502,840 $ 6,122,690 $ 494,229     $ (257,541) $ (25,478)  
Balance, shares at Dec. 31, 2020       463,901,808                
[1] Amount represents a $10.5 million cumulative adjustment, net of tax, to retained earnings as of January 1, 2020, as a result of the adoption of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which became effective January 1, 2020.