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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock [Member]
Common Stock [Member]
Additional paid-in capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accounting Standards Update 2016-13 [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment
Accumulated other comprehensive (loss) income [Member]
Treasury stock [Member]
Beginning of year at Dec. 31, 2019   $ 0 $ 206,968 $ 418,521 $ 2,080,529 $ 1,435 $ 2,081,964 $ 81,750 $ (592,832)
Issuance of preferred stock   200,000              
Dividend reinvestment plan     58 1,645          
Preferred stock issuance costs       (5,416)          
Stock purchase and compensation plans     1,040 24,235          
Net income $ 246,355       246,355        
Dividends to preferred stockholders         0        
Dividends to common stockholders         (56,782)        
Other comprehensive (loss) income 138,436             138,436  
Acquisition of Treasury Stock - share repurchase authorization                 0
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans                 (7,053)
End of year at Dec. 31, 2020 $ 2,738,889 $ 200,000 208,066 438,985 2,271,537 0 2,271,537 220,186 (599,885)
Dividends declared per share to preferred stockholders $ 0                
Dividends declared per share to common stockholders $ 0.94                
Preferred stock, shares outstanding, beginning of period at Dec. 31, 2019 0                
Issuance of preferred stock, shares   8,000              
Preferred stock, shares outstanding, end of period at Dec. 31, 2020 8,000                
Common stock, shares outstanding, beginning of period at Dec. 31, 2019 59,461,153                
Dividend reinvestment plan, shares 28,890                
Stock purchase and compensation plan, shares 519,863                
Acquisition of treasury stock, share repurchase authorization, shares 0                
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (104,103)                
Common stock, shares outstanding, end of period at Dec. 31, 2020 59,905,803                
Issuance of preferred stock   $ 0              
Dividend reinvestment plan     46 1,707          
Preferred stock issuance costs       0          
Stock purchase and compensation plans     790 23,655          
Net income $ 403,837       403,837        
Dividends to preferred stockholders         (9,353)        
Dividends to common stockholders         (62,549)        
Other comprehensive (loss) income (105,087)             (105,087)  
Acquisition of Treasury Stock - share repurchase authorization                 (3,404)
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans                 (5,646)
End of year at Dec. 31, 2021 $ 2,982,885 $ 200,000 208,902 464,347 2,603,472 $ 0 $ 2,603,472 115,099 (608,935)
Dividends declared per share to preferred stockholders $ 1,169.17                
Dividends declared per share to common stockholders $ 1.03                
Issuance of preferred stock, shares   0              
Preferred stock, shares outstanding, end of period at Dec. 31, 2021 8,000                
Dividend reinvestment plan, shares 22,986                
Stock purchase and compensation plan, shares 395,018                
Acquisition of treasury stock, share repurchase authorization, shares (52,781)                
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (86,644)                
Common stock, shares outstanding, end of period at Dec. 31, 2021 60,184,382                
Issuance of preferred stock   $ 0              
Dividend reinvestment plan     44 1,784          
Preferred stock issuance costs       0          
Stock purchase and compensation plans     748 27,357          
Net income $ 224,886       224,886        
Dividends to preferred stockholders         (9,200)        
Dividends to common stockholders         (69,455)        
Other comprehensive (loss) income (613,141)             (613,141)  
Acquisition of Treasury Stock - share repurchase authorization (12,400)               (12,424)
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans                 (5,920)
End of year at Dec. 31, 2022 $ 2,527,564 $ 200,000 $ 209,694 $ 493,488 $ 2,749,703     $ (498,042) $ (627,279)
Dividends declared per share to preferred stockholders $ 1,150                
Dividends declared per share to common stockholders $ 1.14                
Issuance of preferred stock, shares   0              
Preferred stock, shares outstanding, end of period at Dec. 31, 2022 8,000                
Dividend reinvestment plan, shares 22,093                
Stock purchase and compensation plan, shares 374,102                
Acquisition of treasury stock, share repurchase authorization, shares (165,159)                
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (76,518)                
Common stock, shares outstanding, end of period at Dec. 31, 2022 60,338,900