Summary of Significant Accounting Policies - Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2022
Minimum [Member] | Vehicles - Excluding Rail Haul Cars [Member]
Property, Plant and Equipment
Useful Life	3 years
Minimum [Member] | Vehicles - Rail Haul Cars [Member]
Property, Plant and Equipment
Useful Life	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment
Useful Life	3 years
Minimum [Member] | Building and Improvements [Member]
Property, Plant and Equipment
Useful Life	5 years
Minimum [Member] | Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment
Useful Life	3 years
Maximum [Member] | Vehicles - Excluding Rail Haul Cars [Member]
Property, Plant and Equipment
Useful Life	10 years
Maximum [Member] | Vehicles - Rail Haul Cars [Member]
Property, Plant and Equipment
Useful Life	30 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment
Useful Life	30 years
Maximum [Member] | Building and Improvements [Member]
Property, Plant and Equipment
Useful Life	40 years
Maximum [Member] | Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment
Useful Life	10 years