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Acquisitions - Acquisition of Catalyst Repository Systems Inc. Preliminary Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Jan. 31, 2019
Business Acquisition [Line Items]      
Goodwill $ 3,765,898 $ 3,769,908  
Catalyst Repository Systems Inc      
Business Acquisition [Line Items]      
Current assets     $ 9,699
Non-current tangible assets     5,754
Liabilities assumed     (17,891)
Total identifiable net assets     39,827
Goodwill     30,973
Net assets acquired     70,800
Catalyst Repository Systems Inc | Customer assets      
Business Acquisition [Line Items]      
Acquired intangible assets     30,607
Catalyst Repository Systems Inc | Technology assets      
Business Acquisition [Line Items]      
Acquired intangible assets     $ 11,658