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Interest Rate Swap Derivatives (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Dec. 31, 2016
Interest Rate Swap 1 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   $ 116 $ (197)
Effective portion reclassified from AOCI into income   (338) (628)
Interest Rate Swap 2 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   (24) (514)
Effective portion reclassified from AOCI into income   (525) (880)
Interest Rate Swap 3 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   75 19
Effective portion reclassified from AOCI into income   (458) (747)
Ineffective portion recognized in income on Derivatives   (1) 1
Interest Rate Swap [Member]      
Amount of pre-tax gain (loss) recognized in OCI   167 (692)
Effective portion reclassified from AOCI into income $ 307 (1,321) (2,255)
Ineffective portion recognized in income on Derivatives   $ (1) $ 1