Revenue Recognition (Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total revenues	$ 398,311	$ 434,447
Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	203,036	198,851
Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	174,263	212,709
Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	21,012	22,887
Offshore pipeline transportation
Disaggregation of Revenue [Line Items]
Total revenues	108,887	101,990
Offshore pipeline transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	108,887	101,990
Offshore pipeline transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Offshore pipeline transportation | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Marine transportation
Disaggregation of Revenue [Line Items]
Total revenues	80,644	83,574
Marine transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	80,644	83,574
Marine transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Marine transportation | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Onshore transportation and services
Disaggregation of Revenue [Line Items]
Total revenues	208,780	248,883
Onshore transportation and services | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	13,505	13,287
Onshore transportation and services | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	174,263	212,709
Onshore transportation and services | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 21,012	$ 22,887