Segment Reporting - Identifiable Assets by Industry Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total assets	$ 384,159	$ 374,703
Operating Segments
Segment Reporting Information [Line Items]
Total assets	384,159	374,703	$ 296,187
Operating Segments | Marketing
Segment Reporting Information [Line Items]
Total assets	215,813	162,770	128,441
Operating Segments | Trans-portation
Segment Reporting Information [Line Items]
Total assets	60,405	67,167	72,247
Operating Segments | Pipeline and storage
Segment Reporting Information [Line Items]
Total assets	25,815	25,569	24,541
Operating Segments | Logistics and repurposing
Segment Reporting Information [Line Items]
Total assets	45,307	0	0
Cash and other
Segment Reporting Information [Line Items]
Total assets	$ 36,819	$ 119,197	$ 70,958