Contingencies (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Reserve for environmental matters	$ 17,059
Environmental Issue
Loss Contingencies [Line Items]
Largest range for any one site	11,400
Environmental Issue | Minimum
Loss Contingencies [Line Items]
Estimated total liability for environmental sites	17,100
Environmental Issue | Maximum
Loss Contingencies [Line Items]
Estimated total liability for environmental sites	$ 73,500