Commitments and Contingencies - Estimated Potential Payments Under Tax Receivable Agreement (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Tax Receivable Agreement [Abstract]
Tax Receivable Agreement Future Maximum Payments, Due in the Next Fiscal Year	$ 30,305
Tax Receivable Agreement Future Maximum Payments, Due Year Two	26,370
Tax Receivable Agreement Future Maximum Payments, Due Year Three	25,447
Tax Receivable Agreement Future Maximum Payments, Due Year Four	32,628
Tax Receivable Agreement Future Maximum Payments, Due Year Five	25,803
Tax Receivable Agreement Future Maximum Payments, Due After Year Five	65,199
Estimated future payments under tax receivable agreement	$ 205,752