Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Short-term deferred tax liability	$ 5,937		$ 5,937
Income tax rate	13.40%	17.80%
NuDevco Retail Holdings and NuDevco Retail
Related Party Transaction [Line Items]
Net deferred tax asset	$ 15,600
NuDevco Retail Holdings and NuDevco Retail | Tax Receivable Agreement
Related Party Transaction [Line Items]
Deferred tax liabilities	32,300
Deferred tax assets	8,200
NuDevco Retail Holdings and NuDevco Retail | Tax Receivable Agreement | Taxes Payable, Current, Related Parties
Related Party Transaction [Line Items]
Deferred tax liabilities	5,900		$ 5,900
Short-term deferred tax liability	$ 5,900