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Unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Paid-in Capital
Retained Earnings Substantially Restricted
Accumulated Other Compre- hensive Income (loss)
Balance, beginning (in shares) at Dec. 31, 2020   95,426,364      
Balance, beginning at Dec. 31, 2020 $ 2,307,041 $ 954 $ 1,495,053 $ 667,944 $ 143,090
Increase (Decrease) in Stockholders' Equity          
Net income 80,802     80,802  
Other comprehensive loss (63,170)       (63,170)
Cash dividends declared (29,674)     (29,674)  
Stock issuances under stock incentive plans (in shares)   75,455      
Stock issuances under stock incentive plans 0 $ 1 (1)    
Stock-based compensation and related taxes 386   386    
Balance, ending (in shares) at Mar. 31, 2021   95,501,819      
Balance, ending at Mar. 31, 2021 $ 2,295,385 $ 955 1,495,438 719,072 79,920
Balance, beginning (in shares) at Dec. 31, 2021 110,687,533 110,687,533      
Balance, beginning at Dec. 31, 2021 $ 3,177,622 $ 1,107 2,338,814 810,342 27,359
Increase (Decrease) in Stockholders' Equity          
Net income 67,795     67,795  
Other comprehensive loss (275,168)       (275,168)
Cash dividends declared (36,648)     (36,648)  
Stock issuances under stock incentive plans (in shares)   75,783      
Stock issuances under stock incentive plans 0 $ 1 (1)    
Stock-based compensation and related taxes $ 592   592    
Balance, ending (in shares) at Mar. 31, 2022 110,763,316 110,763,316      
Balance, ending at Mar. 31, 2022 $ 2,934,193 $ 1,108 $ 2,339,405 $ 841,489 $ (247,809)