Income Taxes - Tax Receivable Agreement (Details) - USD ($) $ in Thousands		12 Months Ended
	May 29, 2014	Dec. 31, 2018	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Payable pursuant to tax receivable agreement		$ 68,110	$ 70,529
Valuation allowance		(13,862)	(20,382)
Deferred tax assets, net of valuation allowance		301,479	203,065
Tax Receivable Agreement | IPO
Operating Loss Carryforwards [Line Items]
Payment of net cash savings from tax, percent	85.00%
Payable pursuant to tax receivable agreement		68,100	70,500
Deferred tax assets, net of valuation allowance		80,100	$ 83,000
TRA Liability [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset valuation increase (decrease)		35,800
TRA Liability, Corporate Rate Reduction [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset valuation increase (decrease)		55,900
TRA Liability, Change In Valuation [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax asset valuation increase (decrease)		$ 20,100