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Goodwill and Other Intangible Assets - Changes in Net Carrying Amount of Contracts and Related Customer Relationships (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Feb. 28, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Finite-lived Intangible Assets [Roll Forward]        
Beginning balance   $ 4,573,690    
Amortization   1,209,966 $ 1,222,398 $ 1,238,064
Ending balance   4,080,351 4,573,690  
Contracts and related customer relationships        
Finite-lived Intangible Assets [Roll Forward]        
Beginning balance   3,374,156 4,091,545  
Amortization   (1,109,787) (1,134,271)  
Other adjustments   0 200  
Ending balance   2,966,018 3,374,156 $ 4,091,545
Customer Relationships        
Finite-lived Intangible Assets [Roll Forward]        
Acquisition of customer relationships and contract additions   5,333 29,986  
Customer Contracts        
Finite-lived Intangible Assets [Roll Forward]        
Acquisition of customer relationships and contract additions $ 163,000 $ 696,316 $ 386,696