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Common and Preferred Stock - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Aug. 05, 2020
Sep. 30, 2021
Mar. 31, 2021
Jun. 30, 2021
Sep. 30, 2021
Feb. 07, 2019
Common Stock Repurchases (Textual) [Abstract]            
Authorized repurchase of additional shares           500,000
Repurchased shares         53,784  
Shares remain available for repurchase   546,283     546,283  
Common stock purchased for treasury         $ 2.8  
Convertible Preferred Stock (as if Converted to Common Stock)            
Class Of Stock [Line Items]            
Preferred stock dividend rate percentage 5.50%          
Frequency of periodic payment of cumulative dividend quarterly          
Convertible preferred stock conversion price per share $ 21.25          
Dividends paid in kind     $ 3.8 $ 3.8 $ 5.8  
Dividends paid in cash   $ 2.0        
Crestview Partners | Convertible Preferred Stock (as if Converted to Common Stock)            
Class Of Stock [Line Items]            
Convertible Preferred Stock, Shares Issued upon Conversion 135,000          
Preferred Stock, Par value $ 0.01          
Purchase price $ 135.0          
Shares issued, price per share $ 1.000          
Capital raising expense $ 9.2