Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accrued Liabilities
Accrued oil and gas capital expenditures	$ 3,021	$ 1,534
Accrued revenue and royalty distributions	10,363	13,302
Accrued lease operating and workover expense	2,799	2,843
Accrued interest	262	209
Accrued taxes	1,405	1,813
Compensation and benefit related accruals	2,152	2,855
Other	1,971	2,965
Accrued liabilities	$ 21,973	$ 25,521