Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2018	Oct. 10, 2017
Operating Loss Carryforwards [Line Items]
Provisional tax benefit		$ 700
Common stock, shares issued (in shares)				1
Common stock, par value (in dollars per share)				$ 0.001
Deferred tax asset, investment in partnership		$ 22,601	$ 93,089
Liabilities under tax receivable agreement	$ 162,076		$ 52,535
Percent of tax benefits realized that the company must make payments to holders for	85.00%
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 100,500
Operating loss carryforwards expiring in 2037	1,900
Operating loss carryforwards expiring in 2038	98,600
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	5,300
Operating loss carryforwards expiring in 2028	200
Operating loss carryforwards expiring in 2029	$ 5,100