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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 30, 2020
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Accounting policy disclosures        
Redeemable noncontrolling interests   $ 484,764   $ 464,359
Capitalized Contract Cost   84,000 $ 88,000  
Amortization expense related to the programs   97,000 112,000  
Total costs capitalized   368,000   381,000
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]        
Accounts Receivable, Net, Current   916,899   953,812
Allowance for Doubtful Accounts Receivable, Current   44,602   $ 44,431
Advertising expenses   129,000 150,000  
Research and Development        
Research and development cost   11,000 $ 10,000  
Class B common stock | Northstar Manager LLC        
Variable Interest Entity        
Equity Method Investment, Ownership Percentage 3.00%      
SNR HoldCo        
Accounting policy disclosures        
Value of ownership interest accrued   385,000    
Northstar Manager LLC        
Redeemable Noncontrolling Interest        
Accrued redeemable non-controlling interest   $ 100,000    
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%