Commitments and Contingencies - Summary of Balance Sheet Classification of Environmental Liabilities and Indemnification Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Current portion of environmental remediation obligations	$ 400		$ 600
Long-term portion of environmental remediation obligations	3,200		3,100
Total	3,600		3,700
Current portion of indemnification assets	400		600
Non-current portion of indemnification assets	3,200		3,100
Total	3,600		$ 3,700
Site Contingency [Line Items]
Proceeds from Insurance Settlement, Investing Activities	$ 1,300	$ 0