Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Beginning balance	$ 158,706	$ 172,166
Amortization	(13,460)	(13,460)
Ending balance	$ 145,246	$ 158,706
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Agreement term (in years)	15 years
Dedicated acreage | a	35,000
Useful life	15 years