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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Unrealized (losses) gains on available for sale securities      
Balance at the beginning of the period $ (8,823)    
Other Comprehensive Income (505) $ (4,082) $ (1,434)
Impact of Tax Act [1] (2,009)    
Balance at the end of the period (11,337) (8,823)  
Unrealized (losses) gains on pension benefits      
Balance at the beginning of the period (4,741)    
Other Comprehensive Income 193 (630) 380
Impact of Tax Act [1] (985)    
Balance at the end of the period (5,533) (4,741)  
Unrealized (losses) gains on cash flow hedges      
Balance at the beginning of the period 500    
Other Comprehensive Income 1,089 1,270 (201)
Impact of Tax Act [1] 342    
Balance at the end of the period 1,931 500  
Total      
Balance at the beginning of the period (13,064)    
Other Comprehensive Income 777 (3,442) $ (1,255)
Impact of Tax Act [1] (2,652)    
Balance at the end of the period $ (14,939) $ (13,064)  
[1] Impact of Tax Act related to reclassification to retained earnings.