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Interest Rate Swap Derivatives (Details 1) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Interest Rate Swap 1 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   $ 18 $ (197)
Effective portion reclassified from AOCI into income   (112) (628)
Interest Rate Swap 2 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   (138) (514)
Effective portion reclassified from AOCI into income   (172) (880)
Interest Rate Swap 3 [Member]      
Amount of pre-tax gain (loss) recognized in OCI   19 19
Effective portion reclassified from AOCI into income   (152) (747)
Ineffective portion recognized in income on Derivatives     1
Interest Rate Swap [Member]      
Amount of pre-tax gain (loss) recognized in OCI   (101) (692)
Effective portion reclassified from AOCI into income $ 439 $ (436) (2,255)
Ineffective portion recognized in income on Derivatives     $ 1