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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, 2023   $ 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 (loss) $ 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 - share repurchase authorization             0
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          
Preferred stock, shares outstanding:              
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        
Common stock, shares outstanding:              
Dividend reinvestment plan (in shares)     4,806        
Stock purchase and compensation plan (in shares)     219,264        
Acquisition of treasury stock - share repurchase authorization (in shares)     0        
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        
Beginning of period at Dec. 31, 2024 $ 3,120,076 $ 200,000 $ 211,219 557,042 3,139,489 (336,845) (650,829)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of preferred stock   0          
Dividend reinvestment plan     12 508      
Stock purchase and compensation plans     442 13,739      
Net income (loss) 109,896       109,896    
Dividends to preferred stockholders         (2,300)    
Dividends to common stockholders         (23,354)    
Other comprehensive income (loss) 64,777         64,777  
Acquisition of treasury stock - share repurchase authorization (19,400)           (19,421)
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans             (5,835)
End of period at Mar. 31, 2025 $ 3,258,540 $ 200,000 $ 211,673 $ 571,289 $ 3,223,731 $ (272,068) $ (676,085)
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) $ 0.38            
Preferred stock, shares outstanding, beginning balance (in shares) at Dec. 31, 2024   8,000          
Preferred stock, shares outstanding:              
Issuance of preferred stock (in shares)   0          
Preferred stock, shares outstanding, ending balance (in shares) at Mar. 31, 2025   8,000          
Common stock, shares outstanding, beginning of period (in shares) at Dec. 31, 2024     60,847,896        
Common stock, shares outstanding:              
Dividend reinvestment plan (in shares)     6,207        
Stock purchase and compensation plan (in shares)     220,856        
Acquisition of treasury stock - share repurchase authorization (in shares) (233,611)   (233,611)        
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans (in shares)     (68,360)        
Common stock, shares outstanding, end of period (in shares) at Mar. 31, 2025     60,772,988