Property and Equipment - Schedule of Property and equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Less accumulated depreciation	$ (955,672)	$ (932,614)
Property and equipment, net	1,412,474	1,433,169
Vessels [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,715,688	1,705,719
Vessel Related Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	396,936	391,985
Buoy and Pipeline [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	11,493	11,553
Finance Lease Right-of-Use Assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	219,435	219,435
Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,079	16,068
Assets in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,515	$ 21,023