Income Taxes - Additional information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) agreement shares	Mar. 31, 2019	Dec. 31, 2019 USD ($)
Tax Credit Carryforward [Line Items]
Effective income tax rate	32.00%	14.30%
U.S. federal statutory rate	21.00%	21.00%
Net deferred tax assets	$ 455,183		$ 411,177
Federal net operating loss	20,313
Total liability related to uncertain tax positions	$ 420		420
Number of tax receivable agreements | agreement	2
Percentage of remaining tax savings	15.00%
Tax benefit obligation	$ 468,711		$ 427,216
TRA Holders
Tax Credit Carryforward [Line Items]
Applicable tax savings	85.00%
Decrease in deferred tax assets	$ 1,331
Deferred tax asset	49,518
Deferred tax liability	$ 41,997
Class A Common Stock
Tax Credit Carryforward [Line Items]
Number of shares exchanged | shares	2,060,443
Class A Common Stock | TRA Holders
Tax Credit Carryforward [Line Items]
Number of shares exchanged | shares	2,060,443