Leases - Land Lease Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease costs
Land lease expense	$ 325	$ 354	$ 977	$ 922
Finance lease right-of-use asset amortization and interest expense			0
Operating lease costs	325	354	973	925
Total Non-Variable Lease Costs	325	354	973	925
Right-of-use assets obtained in exchange for new operating lease liabilities				19,672
Right-of-use assets removed in exchange for real property		(3,025)		(3,025)
Right-of-use assets net change		(3,025)		16,647
Operating cash outflows from operating leases	$ 267	$ 297	$ 802	$ 805
Weighted-average remaining lease term - operating leases (years)	38 years 2 months 12 days	38 years 3 months 18 days	38 years 2 months 12 days	38 years 3 months 18 days
Weighted-average discount rate - operating leases	4.13%	4.13%	4.13%	4.13%
Maturity Analysis of Lease Liabilities
Lease payments 2020 (remaining)	$ 267		$ 267
Lease payments 2021	1,015		1,015
Lease payments 2022	789		789
Lease payments 2023	789		789
Lease payments 2024	789		789
Lease payment Thereafter	30,584		30,584
Lease payments Total	34,233		34,233
Imputed interest 2020 (remaining)	(164)		(164)
Imputed interest 2021	(645)		(645)
Imputed interest 2022	(634)		(634)
Imputed interest 2023	(628)		(628)
Imputed interest 2024	(621)		(621)
Imputed interest Thereafter	(15,634)		(15,634)
Imputed interest Total	(18,326)		(18,326)
Total Lease Liabilities 2020 (remaining)	103		103
Total Lease Liabilities 2021	370		370
Total Lease Liabilities 2022	155		155
Total Lease Liabilities 2023	161		161
Total Lease Liabilities 2024	168		168
Total Lease Liabilities Thereafter	14,950		14,950
Total Lease Liabilities	$ 15,907		$ 15,907