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Other Intangible Assets, net and Goodwill - Other Intangibles Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Jun. 30, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jan. 01, 2020
Goodwill [Line Items]          
Amortization of intangible assets   $ 128,321 $ 49,112    
Customer First Now          
Goodwill [Line Items]          
Increase in intangible assets $ 6,446        
Asset acquisition, consideration transferred $ 6,446        
Remaining Range of Years 4 years 8 months 12 days        
Discontinued Operations, Disposed of by Sale | Brand Protection, AntiPiracy, and AntiFraud Solutions          
Goodwill [Line Items]          
Purchase price         $ 3,751
Impairment of intangible assets     $ 17,967    
Computer software | Customer First Now          
Goodwill [Line Items]          
Increase in intangible assets $ 1,000        
Remaining Range of Years 3 years        
Database Rights | Customer First Now          
Goodwill [Line Items]          
Increase in intangible assets $ 5,446        
Remaining Range of Years 5 years        
Trade names          
Goodwill [Line Items]          
Indefinite-lived intangible assets   $ 162,961   $ 161,245