Other Non-Current Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Land lease and purchase options	$ 4,882	$ 4,320
Permitting costs	13,092	12,838
Right of use asset — operating leases (Note 13)	15,272	15,832
Other	3,437	3,765
Total other non-current assets	$ 36,683	$ 36,755
Maximum terms (in years)	50 years