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Unaudited Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred stock:
Common stock:
Additional paid-in capital:
Retained earnings:
Accumulated other comprehensive income (loss):
Treasury stock:
Beginning of period at Dec. 31, 2022   $ 200,000 $ 209,694 $ 493,488 $ 2,749,703 $ (498,042) $ (627,279)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of preferred stock   0          
Dividend reinvestment plan     9 459      
Stock purchase and compensation plans     446 8,766      
Net income $ 92,574       92,574    
Dividends to preferred stockholders         (2,300)    
Dividends to common stockholders         (18,364)    
Other comprehensive income (loss) 67,693         67,693  
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans             (7,443)
End of period at Mar. 31, 2023 $ 2,669,404 $ 200,000 210,149 502,713 2,821,613 (430,349) (634,722)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per preferred share (in dollars per share) $ 287.50            
Dividends declared per common share (in dollars per share) $ 0.30            
Preferred stock, shares outstanding, beginning balance (in shares) at Dec. 31, 2022 8,000            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of preferred stock (in shares)   0          
Preferred stock, shares outstanding, ending balance (in shares) at Mar. 31, 2023 8,000            
Common stock, shares outstanding, beginning of period (in shares) at Dec. 31, 2022 60,338,900            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividend reinvestment plan (in shares) 4,650            
Stock purchase and compensation plan (in shares) 222,816            
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans (in shares) (73,780)            
Common stock, shares outstanding, end of period (in shares) at Mar. 31, 2023 60,492,586            
Beginning of period at Dec. 31, 2023 $ 2,954,381 $ 200,000 210,447 522,748 3,029,396 (373,001) (635,209)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of preferred stock   0          
Dividend reinvestment plan     10 488      
Stock purchase and compensation plans     438 11,091      
Net income 82,518       82,518    
Dividends to preferred stockholders         (2,300)    
Dividends to common stockholders         (21,464)    
Other comprehensive income (loss) (11,971)         (11,971)  
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans             (6,697)
End of period at Mar. 31, 2024 $ 3,006,494 $ 200,000 $ 210,895 $ 534,327 $ 3,088,150 $ (384,972) $ (641,906)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per preferred share (in dollars per share) $ 287.50            
Dividends declared per common share (in dollars per share) $ 0.35            
Preferred stock, shares outstanding, beginning balance (in shares) at Dec. 31, 2023 8,000            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of preferred stock (in shares)   0          
Preferred stock, shares outstanding, ending balance (in shares) at Mar. 31, 2024 8,000            
Common stock, shares outstanding, beginning of period (in shares) at Dec. 31, 2023 60,636,437            
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividend reinvestment plan (in shares) 4,806            
Stock purchase and compensation plan (in shares) 219,264            
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans (in shares) (69,068)            
Common stock, shares outstanding, end of period (in shares) at Mar. 31, 2024 60,791,439