Commitments and Contingencies - Self-Insurance (Details) $ in Millions	Jun. 30, 2020 USD ($)
Loss Contingencies [Line Items]
Self insurance workers' compensation coverage ceiling per accident	$ 4.0
Self Insurance General Liability Claims Coverage Ceiling per Occurrence	4.0
Self Insurance, Medical Coverage for Employees Per Claim	0.3
Self Insurance Auto Liability Coverage Ceiling per accident	$ 4.0