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Supplemental Information	3 Months Ended
Supplemental Information	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Information	Supplemental Information Accrued Liabilities Accrued liabilities were $18,032 and $17,507 at March 31, 2020 and December 31, 2019, respectively. Accrued interest, accrued taxes, accrued maintenance, commodity derivative related accrual, and accrued capital expenditures, which are components of accrued liabilities, were $3,950, $3,536, $3,769, $1,708 and $1,630, respectively, at March 31, 2020 and $4,187, $2,611, $3,225, $1,959 and $2,375, respectively, at December 31, 2019. No other component of accrued liabilities was more than five percent of total current liabilities. Non-cash Investing Activity The non-cash investing activities related to accruals for capital expenditures were $20 and $52 for the three months ended March 31, 2020 and 2019, respectively.