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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Leases [Abstract]        
Operating lease expense [1] $ 212 $ 206 $ 635 $ 627
Operating lease income [2] 206 $ 212 630 633
Operating lease, right-of-use asset 3,109   3,109  
Operating lease, liability $ 3,159   $ 3,159  
Weighted-average remaining lease term (in years) 6 years 26 days   6 years 26 days  
Weighted-average discount rate 3.14%   3.14%  
Operating cash flows from operating leases     $ 552 $ 574
[1] Includes short-term lease costs. For the three- and nine-month periods ended September 30, 2020 and 2019, short-term lease costs were nominal in amount.
[2] Operating lease income includes rental income from owned properties.