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Stockholders' Equity (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]      
Preferred stock $ 92,000,000 $ 92,000,000  
Common stock 59,885,000 59,885,000  
Legal surplus 103,300,000 $ 95,800,000  
Stock Repurchase Program Remaining Authorized Repurchase Amount $ 5,500,000    
Stock repurchase program remaining number of shares authorized to be repurchased 297,219    
Stock Repurchase Program Authorized Amount $ 70,000,000    
Share price $ 18.54    
Shares repurchased during period, shares 175,000 0 0
Common shares repurchased as part of the stock repurchase program (Value) $ 2,226,000 $ 0 $ 0
Share repurchased, average price per share $ 12.69    
Preferred Stock [Member]      
Equity, Class of Treasury Stock [Line Items]      
Preferred Stock Issue Costs $ 10,100,000 10,100,000  
Common Stock [Member]      
Equity, Class of Treasury Stock [Line Items]      
Common Stock Issuance Cost $ 13,600,000 $ 13,600,000  
Shares repurchased during period, shares 0 0 0