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Acquisition - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 07, 2021
Sep. 30, 2021
Sep. 30, 2021
Jun. 07, 2021
Dec. 31, 2020
Business Acquisition [Line Items]          
Aggregate principal amount of debt issued   $ 1,540,000 $ 1,540,000   $ 1,000,000
Senior Unsecured Notes Due 2029 | Senior Notes          
Business Acquisition [Line Items]          
Aggregate principal amount of debt issued   $ 500,000 $ 500,000   $ 0
Interest rate   4.125% 4.125%    
Data Foundry Acquisition          
Business Acquisition [Line Items]          
Cash consideration paid for acquisition $ 415,600        
Considerations to be paid for acquisition upon finalization of closing conditions $ 6,500        
Cash, cash equivalents and restricted cash acquired       $ 4,600  
Acquisition-related costs   $ 100 $ 4,500    
Acquisition revenue   12,000 15,300    
Acquisition net income   $ 100 $ 300