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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]          
Goodwill $ 213,727   $ 213,727   $ 97,866
Amortization expense $ 3,200 $ 2,100 8,200 $ 5,500  
Capitalized internal-use software costs for works in process     $ 6,000