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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]
Accumulated other comprehensive income (loss) [Member]
Treasury stock [Member]
Preferred Stock, Shares Outstanding (share amounts not in thousands) 8,000            
Beginning of period at Dec. 31, 2021   $ 200,000 $ 208,902 $ 464,347 $ 2,603,472 $ 115,099 $ (608,935)
Issuance of preferred stock   0          
Dividend reinvestment plan     11 443      
Stock purchase and compensation plans     423 8,000      
Net income $ 56,330       56,330    
Dividends to preferred stockholders         (2,300)    
Dividends to common stockholders         (17,065)    
Other comprehensive income (loss) (244,894)         (244,894)  
Acquisition of treasury stock - share repurchase authorization             (76)
Acquisition of treasury stock - shares acquired related to employee-share based compensation plans             (5,516)
End of period at Mar. 31, 2022 $ 2,778,241 $ 200,000 209,336 472,790 2,640,437 (129,795) (614,527)
Dividends declared per share to preferred stockholders (Per share $ not in thousands) $ 287.50            
Dividends declared per share to common stockholders (Per share $ not in thousands) $ 0.28            
Issuance of preferred stock, shares (share amounts not in thousands)   0          
Common stock, shares outstanding, beginning of period (share amounts not in thousands) at Dec. 31, 2021 60,184,382            
Dividend reinvestment plan, shares (share amounts not in thousands) 5,641            
Stock purchase and compensation plan, shares (share amounts not in thousands) 218,442            
Acquisition of treasury stock, share repurchase authorization, shares (share amounts not in thousands) (1,000)            
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans, shares (share amounts not in thousands) (71,993)            
Common stock, shares outstanding, end of period (share amounts not in thousands) at Mar. 31, 2022 60,335,472            
Preferred Stock, Shares Outstanding (share amounts not in thousands) 8,000            
Preferred Stock, Shares Outstanding (share amounts not in thousands) 8,000            
Beginning of period at Dec. 31, 2022 $ 2,527,564 $ 200,000 209,694 493,488 2,749,703 (498,042) (627,279)
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 - share repurchase authorization             0
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)
Dividends declared per share to preferred stockholders (Per share $ not in thousands) $ 287.50            
Dividends declared per share to common stockholders (Per share $ not in thousands) $ 0.30            
Issuance of preferred stock, shares (share amounts not in thousands)   0          
Common stock, shares outstanding, beginning of period (share amounts not in thousands) at Dec. 31, 2022 60,338,900            
Dividend reinvestment plan, shares (share amounts not in thousands) 4,650            
Stock purchase and compensation plan, shares (share amounts not in thousands) 222,816            
Acquisition of treasury stock, share repurchase authorization, shares (share amounts not in thousands) 0            
Acquisition of treasury stock - shares acquired related to employee share-based compensation plans, shares (share amounts not in thousands) (73,780)            
Common stock, shares outstanding, end of period (share amounts not in thousands) at Mar. 31, 2023 60,492,586            
Preferred Stock, Shares Outstanding (share amounts not in thousands) 8,000