Fair Value - Unobservable Inputs Related to our Level 3 Liabilities (Details) - Level 3 - Natural Gas $ in Thousands	Mar. 31, 2020 USD ($) usdPerMMBtu	Dec. 31, 2019 USD ($) usdPerMMBtu
Derivatives, Fair Value [Line Items]
Derivative Liabilities | $	$ 6,503	$ 6,968
Valuation Technique, Discounted Cash Flow | Forward basis price | Weighted Average
Derivatives, Fair Value [Line Items]
Derivative, measurement input	2.88	3.23
Valuation Technique, Discounted Cash Flow | Forward basis price | Minimum
Derivatives, Fair Value [Line Items]
Derivative, measurement input	1.69	2.39
Valuation Technique, Discounted Cash Flow | Forward basis price | Maximum
Derivatives, Fair Value [Line Items]
Derivative, measurement input	4.61	5.65