Segment Reporting - Identifiable Assets by Industry Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Segment Reconciliation [Abstract]
Total assets	$ 462,123	$ 374,703
Operating segments
Segment Reconciliation [Abstract]
Total assets	462,123	374,703
Operating segments | Crude oil marketing
Segment Reconciliation [Abstract]
Total assets	231,014	162,770
Operating segments | Trans-portation
Segment Reconciliation [Abstract]
Total assets	61,429	67,167
Operating segments | Pipeline and storage
Segment Reconciliation [Abstract]
Total assets	25,742	25,569
Operating segments | Logistics and repurposing
Segment Reconciliation [Abstract]
Total assets	45,404	0
Cash and other
Segment Reconciliation [Abstract]
Total assets	$ 98,534	$ 119,197