Commitments and Contingencies - Estimated Potential Payments Under Tax Receivable Agreement (Detail) $ in Thousands	Jun. 30, 2020 USD ($)
Tax Receivable Agreement [Abstract]
Tax Receivable Agreement Future Maximum Payments Due Remainder Of The Year	$ 11,796
Tax Receivable Agreement Future Maximum Payments, Due Year Two	1,539
Tax Receivable Agreement Future Maximum Payments, Due Year Three	26,069
Tax Receivable Agreement Future Maximum Payments, Due Year Four	41,769
Tax Receivable Agreement Future Maximum Payments, Due Year Five	40,774
Tax Receivable Agreement Future Maximum Payments, Due After Year Five	65,514
Estimated future payments under tax receivable agreement	$ 187,461