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Leases - Land Lease Obligations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lease costs      
Land lease expense $ 1,242 $ 645 $ 653
Operating Lease Costs (1,131)    
Total (1,131)    
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)    
Right-of-use assets net change 16,647    
Operating cash outflows from operating leases $ 1,073    
Weighted average remaining lease term (in years) 38 years 2 months 12 days    
Weighted-average discount rate - operating leases 4.13%    
Maturity Analysis of Lease Liabilities      
Lease Payment 2020 $ 1,069    
Lease Payment 2021 1,015    
Lease Payment 2022 789    
Lease Payment 2023 789    
Lease Payment 2024 789    
Lease Payment Thereafter 30,584    
Lease Payments Total 35,035    
Imputed Interest 2020 (662)    
Imputed Interest 2021 (645)    
Imputed Interest 2022 (634)    
Imputed Interest 2023 (628)    
Imputed Interest 2024 (621)    
Imputed Interest Thereafter (15,634)    
Imputed Interest Total (18,824)    
Total Lease Liabilities 2020 407    
Total Lease Liabilities 2021 370    
Total Lease Liabilities 2022 155    
Total Lease Liabilities 2023 161    
Total Lease Liabilities 2024 168    
Total Lease Liabilities Thereafter 14,950    
Total Lease Liabilities $ 16,211