Contingencies (Details) - USD ($)		1 Months Ended		3 Months Ended
	May 03, 2019	Apr. 30, 2020	Feb. 29, 2020	Jul. 23, 2020	Mar. 31, 2020	Jun. 30, 2019	Dec. 31, 2019	Mar. 31, 2019
Loss Contingencies [Line Items]
Amount awarded to plaintiff	$ 3,200,000					$ 3,200,000
Increase (decrease) in selling, general, and administrative expenses					$ (900,000)
Amount of final judgment			$ 8,100,000
Accrual for environmental investigation and remediation activities					4,200,000		$ 4,400,000	$ 8,400,000
Loss contingency receivable							$ 1,500,000
Amount of loss contingency receivable collected during the period					1,000,000
Portion of loss contingency proceeds representing restricted cash					600,000
Minimum
Loss Contingencies [Line Items]
Estimate of additional expenses					0
Maximum
Loss Contingencies [Line Items]
Estimate of additional expenses					$ 3,800,000
Subsequent Event
Loss Contingencies [Line Items]
Amount awarded to plaintiff		$ 300,000
Reduction in amount awarded to plaintiff				$ 900,000