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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 30, 2020
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Accounting policy disclosures        
Redeemable noncontrolling interests   $ 411,258   $ 395,222
Capitalized Contract Cost   88,000 $ 103,000  
Amortization expense related to the programs   112,000 75,000  
Total costs capitalized   434,000   $ 458,000
Advertising expenses   150,000 110,000  
Research and Development        
Research and development cost   10,000 $ 7,000  
Class B common stock | Northstar Manager LLC        
Variable Interest Entity        
Equity Method Investment, Ownership Percentage 3.00%      
Northstar Spectrum        
Accounting policy disclosures        
Value of ownership interest accrued   88,000    
SNR HoldCo        
Accounting policy disclosures        
Value of ownership interest accrued   $ 323,000    
Northstar Manager LLC | Class B common stock        
Variable Interest Entity        
Ownership percentage 97.00%      
Payment For Purchase Agreement $ 312,000      
Northstar Manager LLC | American II | Class B common stock        
Variable Interest Entity        
Ownership percentage owned by other companies 80.00%