Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives (Detail)	Dec. 31, 2023
Buildings
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	30 years
Furniture, fixtures & equipment | Minimum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	3 years
Furniture, fixtures & equipment | Maximum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	10 years
Capitalized software | Minimum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	3 years
Capitalized software | Maximum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	7 years
Buses and support vehicles | Minimum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	4 years
Buses and support vehicles | Maximum
Property And Equipment, Net [Line Items]
Property, plant and equipment, useful life	15 years