Commitments and Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) item	Feb. 10, 2023 USD ($)
Commitments and Contingencies:
Monetary component of settlement, payment by insurance carriers | $	$ 13.0
Letters of credit outstanding | $	$ 33.3
California Wage And Hour Class Action Litigation
Commitments and Contingencies:
Amount agreed to settle the case, exclusive of employer-side taxes | $		$ 4.7
Estimated employer's side FICA tax | $		$ 0.1
Stockholder Claims
Commitments and Contingencies:
Number of proposed classes filing claims	8
Tennessee State Court Cases
Commitments and Contingencies:
Number of claims	5
Number of claims dismissed	2
Number of claims consolidated	3
Number of officers	5
Number of underwriters	7
Number of remaining claims	1
Federal Court Cases
Commitments and Contingencies:
Number of claims	2
Number of remaining claims	2
New York State Court Case
Commitments and Contingencies:
Number of claims	1
Stockholder Derivative Action Filed In Nevada
Commitments and Contingencies:
Number of officers	5
Number of board members	5
Revenue and other equipment, terminal improvements
Commitments and Contingencies:
2023 | $	$ 132.0
Software licenses
Commitments and Contingencies:
2023 | $	2.5
2024 | $	2.5
2025 | $	2.5
2026 | $	$ 2.5