Commitments and Contingencies - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Increase in workers' compensation collateral requirements	$ 5.2
Purchase obligation, 2021	14.9
Payments for purchase obligation	3.2
Intermountain West
Commitments And Contingencies Disclosure [Line Items]
Reduced purchase obligation	3.3
Payments for purchase obligation	$ 0.3