PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,659,378	$ 1,060,916
Less: accumulated depreciation	(131,608)	(96,553)
Property, plant and equipment, net	1,527,770	964,363
Land, site improvements and rights
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	151,185	52,047
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	126,537	425,261
Bridges and tunnels
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	176,310	0
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,826	4,491
Terminal machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	937,319	557,788
Track and track related assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	96,497	2,349
Railroad equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,792	5,560
Railcars and locomotives
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	126,429	0
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,337	5,101
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,113	2,449
Other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,033	$ 5,870