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Capital Stock (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jan. 07, 2021
USD ($)
$ / shares
shares
Jun. 30, 2022
USD ($)
director
classOfCommonShare
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
director
classOfCommonShare
Jun. 30, 2021
USD ($)
May 14, 2021
USD ($)
Class of Stock [Line Items]            
Classes of common shares | classOfCommonShare   2   2    
Minimum number of directors up for election to entitle shareholders to vote | director   3   3    
Percentage of directors up for election if more than minimum number   33.33%   33.33%    
Preferred stock dividends   $ 12,000 $ 12,000 $ 24,000 $ 23,067  
ION Media            
Class of Stock [Line Items]            
Exercise right of warrants ( in dollars per share) | $ / shares $ 13          
Berkshire Hathaway | Fair Value, Inputs, Level 3            
Class of Stock [Line Items]            
Fair value of warrants, with option to settle for cash, for Class A common stock $ 181,000         $ 280,000
Preferred Stock | Berkshire Hathaway | ION Media            
Class of Stock [Line Items]            
Financing provided for business acquisition $ 600,000          
Preferred shares issued | shares 6,000          
Face value of preferred shares (in dollars per share) | $ / shares $ 100,000          
Preferred shares redemption price, as a percent 105.00%          
Preferred stock dividend rate 8.00%          
Preferred stock dividend rate if dividends not paid in cash 9.00%          
Preferred stock dividends   $ 24,000 $ 21,100      
Common stock, Class A | Berkshire Hathaway            
Class of Stock [Line Items]            
Number of shares purchasable by warrant (up to) | shares 23,100,000          
Exercise right of warrants ( in dollars per share) | $ / shares $ 13          
Common stock, Class A | Berkshire Hathaway | ION Media            
Class of Stock [Line Items]            
Number of shares purchasable by warrant (up to) | shares 23,100,000