Inventory - Components of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Inventory
Equipment and materials	$ 12,035	$ 12,175
Crude oil inventory	16,276	16,781
Total inventory	28,311	28,956
Long-term inventory
Linefill in third party pipelines	17,510	17,510
Total long-term inventory	17,510	17,510
Total	$ 45,821	$ 46,466