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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance $ (2,175) $ (1,980)
Change during the period ended March 31, 2019:    
Adoption of account standard (Note 2) (414)  
Before-tax amount 13 (3)
Tax provision (3) 1
Reclassification adjustment, net of taxes    
Amortization of net loss 34 34
Net realized loss (gain) (3) 18
Total activity in period 31 50
Balance (2,548) (1,930)
Pension adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance (2,178) (1,936)
Change during the period ended March 31, 2019:    
Adoption of account standard (Note 2) (404)  
Before-tax amount 0 0
Tax provision 0 0
Reclassification adjustment, net of taxes    
Amortization of net loss 34 34
Net realized loss (gain) 0 0
Total activity in period 34 34
Balance (2,548) (1,902)
Unrealized Loss on Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance 3 (44)
Change during the period ended March 31, 2019:    
Adoption of account standard (Note 2) (10)  
Before-tax amount 13 (3)
Tax provision (3) 1
Reclassification adjustment, net of taxes    
Amortization of net loss 0 0
Net realized loss (gain) (3) 18
Total activity in period (3) 16
Balance $ 0 $ (28)