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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
AOCI Roll Forward    
Balance $ (2,175) $ (1,980)
Change during the period ended September 30, 2019:    
Adoption of account standard (Note 2) (414)  
Before-tax amount 13 (15)
Tax provision (3) 3
Reclassification adjustment, net of taxes    
Amortization of net loss 50 51
Net realized loss (gain) (3) 28
Total activity for the period 47 67
Balance (2,532) (1,913)
Pension adjustment    
AOCI Roll Forward    
Balance (2,178) (1,936)
Change during the period ended September 30, 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 50 51
Net realized loss (gain) 0 0
Total activity for the period 50 51
Balance (2,532) (1,885)
Unrealized Loss on Securities    
AOCI Roll Forward    
Balance 3 (44)
Change during the period ended September 30, 2019:    
Adoption of account standard (Note 2) (10)  
Before-tax amount 13 (15)
Tax provision (3) 3
Reclassification adjustment, net of taxes    
Amortization of net loss 0 0
Net realized loss (gain) (3) 28
Total activity for the period (3) 16
Balance $ 0 $ (28)