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Hedge Accounting (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Derivative Contracts          
Fair value of derivative instruments $ 1,815   $ 1,815   $ 865
Amount of Gain / (Loss) recognized in OCI on derivative (effective portion) (80) $ 322 (950) $ (173) (865)
Movements in other comprehensive income          
Beginning accumulated derivative instrument gain or loss     (865)    
Net change associated with current period hedging transactions (80) $ 322 (950) $ (173) (865)
Closing accumulated derivative instrument gain or loss (1,815)   $ (1,815)   $ (865)
Interest Rate Swap          
Derivative Contracts          
Derivative term of contract     5 years    
Notional amount 33,200   $ 33,200    
Amount of Gain / (Loss) recognized in OCI on derivative (effective portion)     25    
Movements in other comprehensive income          
Net change associated with current period hedging transactions     25    
Cash Flow Hedging | Interest Rate Swap | Other Comprehensive Income          
Derivative Contracts          
Fair value of derivative instruments $ (1,815)   $ (1,815)    
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap          
Derivative Contracts          
Derivative term of contract     5 years    
Percentage of debt outstanding amount covered by hedging 50.00%   50.00%    
Notional amount $ 33,200   $ 33,200    
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap | Derivative liability          
Derivative Contracts          
Fair value of derivative instruments $ 1,815   $ 1,815