Income Taxes (Details) $ in Thousands		3 Months Ended
	Jan. 17, 2018 agreement	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Effective combined income tax rate		9.70%	15.20%
Income tax expense		$ 261	$ 6,060
NOL carryback refund		9,300
Number of tax receivable agreements | agreement	2
Taxes payable		48,300		$ 50,300
Deferred tax asset		49,900
Taxes payable, current		5,700		1,800
Taxes payable, noncurrent		42,586		48,481
Deferred tax liabilty				$ 49,900
Tax Receivable Agreement
Operating Loss Carryforwards [Line Items]
Tax benefit payment		$ 2,000
Shares of Class B Common Stock | Tax Receivable Agreement | Common Stock
Operating Loss Carryforwards [Line Items]
Taxes payable			5,100
Deferred tax asset			$ 6,000