Commitments and Contingencies - Schedule of Loss Contingencies by Contingency (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Current Portion of Environmental Liabilities	$ 6,933,000	$ 3,431,000
Environmental liabilities	29,424,000	5,600,000
Total environmental liabilities	$ 36,357,000	$ 9,031,000