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Equity, Stock Repurchase Program, Dividends, and Shelf Registration (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jun. 14, 2021
Mar. 11, 2020
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Aug. 04, 2020
Mar. 18, 2020
Apr. 23, 2018
Dividends [Abstract]                              
Dividends declared (in dollars per share)     $ 0.04 $ 0.02 $ 2.02 $ 0.02 $ 0.92 $ 0.02 $ 0.02 $ 0.02 $ 0.10 $ 0.98      
Dividend cost                     $ 2,700 $ 26,800      
Dividends paid                     $ 4,338 $ 25,906      
Shelf Registration [Abstract]                              
Maximum amount of debt and equity to be issued under Shelf Registration                             $ 500,000
Subordinated Notes [Member]                              
Dividends [Abstract]                              
Dividends declared related to issuance of debt (in dollars per share)     $ 2.00               $ 2.00        
Principal amount $ 52,200   $ 52,700               $ 52,700        
Dividends paid 400                   400        
Subordinated Notes [Member] | Computershare Trust Company, N.A. [Member]                              
Dividends [Abstract]                              
Principal amount     $ 54,500               $ 54,500        
Subordinated Notes [Member] | Computershare Trust Company, N.A. [Member] | Maximum [Member]                              
Dividends [Abstract]                              
Principal amount $ 54,000                            
Common Class A [Member]                              
Stock Repurchase Program [Abstract]                              
Number of shares authorized to be repurchased (in shares)                         3,000,000    
Common Class A [Member] | Stock Repurchase Program [Member]                              
Stock Repurchase Program [Abstract]                              
Stock repurchase authorized, amount                           $ 30,000  
Shares repurchased (in shares)                     700,722 296,296      
Average price per share of repurchased shares (in dollars per share)                     $ 23.54 $ 13.16      
Share available under program to repurchase (in shares)   2,000,000 2,173,937               2,173,937        
Aggregate purchase price   $ 30,000                          
Common Class A [Member] | Stock Repurchase Program [Member] | Minimum [Member]                              
Stock Repurchase Program [Abstract]                              
Average price per share of repurchased shares (in dollars per share)   $ 15.00                          
Common Class A [Member] | Stock Repurchase Program [Member] | Maximum [Member]                              
Stock Repurchase Program [Abstract]                              
Average price per share of repurchased shares (in dollars per share)   $ 17.00                          
Common Class A [Member] | Subordinated Notes [Member] | Computershare Trust Company, N.A. [Member]                              
Dividends [Abstract]                              
Dividends declared related to issuance of debt (in dollars per share) $ 2.00