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Share Capital - Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2014
May 31, 2014
Dec. 31, 2021
Mar. 31, 2020
Series C Preferred Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock repurchase program, number of shares authorized to be repurchased (in shares)       100,000
Stock repurchased and retired (in shares)     2,496  
Future redeemable securities     $ 58,242  
Series D Preferred Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock repurchase program, number of shares authorized to be repurchased (in shares)       100,000
Stock repurchased and retired (in shares)     4,950  
Future redeemable securities     $ 80,995  
Preferred Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Redemption price (in USD per share)     $ 25.00  
May 2014 Public Offering        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Net proceeds from public offering and private placement   $ 55,504    
Underwriting discount   1,744    
Offering expenses   $ 252    
May 2014 Public Offering | Series C Preferred Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock issued (in shares)   2,300,000    
Share price (in USD per share)   $ 25.00    
Preferred stock, dividend rate   8.00%    
Dividends in arrears (in USD per share)   $ 2.00    
Redemption price (in USD per share)   $ 25.00    
June 2014 Public Offering        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Net proceeds from public offering and private placement $ 77,420      
Underwriting discount 2,369      
Offering expenses $ 211      
June 2014 Public Offering | Series D Preferred Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock issued (in shares) 3,200,000      
Share price (in USD per share) $ 25.00      
Preferred stock, dividend rate 8.00%      
Dividends in arrears (in USD per share) $ 2.00      
Redemption price (in USD per share) $ 25.00