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Earnings Per Common Share and Stockholders' Equity (Stockholders' Equity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 10, 2020
Nov. 21, 2019
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Class of Stock [Line Items]              
Dividends paid on preferred stock     $ 10,918 $ 10,918 $ 32,756 $ 32,756  
Preferred Stock, Series B              
Class of Stock [Line Items]              
Preferred stock, shares issued 12,000   12,000   12,000   12,000
Preferred stock, dividend rate, percentage 6.625%            
Preferred stock, par value per share $ 1.00   $ 1   $ 1   $ 1
Preferred stock, liquidation preference, per share $ 25,000            
Proceeds from issuance of preferred stock, net $ 290,300            
Dividends paid on preferred stock     $ 5,000 5,000 $ 14,900 14,900  
Preferred Stock, Series A              
Class of Stock [Line Items]              
Preferred stock, shares issued   16,000 16,000   16,000   16,000
Preferred stock, dividend rate, percentage   5.95%          
Preferred stock, par value per share   $ 1.00 $ 1   $ 1   $ 1
Preferred stock, liquidation preference, per share   $ 25,000          
Proceeds from issuance of preferred stock, net   $ 388,900          
Dividends paid on preferred stock     $ 5,900 $ 5,900 $ 17,800 $ 17,800