Summary of Significant Accounting Policies - Total Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Accrued capital expenditures	$ 2,019	$ 32,945
Accrued incentive compensation	9,057	16,109
Accrued property taxes	8,131	5,822
Accrued other	3,495	5,213
Total accrued liabilities	$ 22,702	$ 60,089