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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
AOCI Roll Forward    
Balance $ (2,175) $ (1,980)
Change during period:    
Adoption of accounting standard (Note 1) (414)  
Before-tax amount (287) (410)
Tax benefit (expense) 63 89
Reclassification adjustment, net of taxes    
Amortization of net loss 68 63
Net realized gain (loss) (3) 63
Total activity for the period (573) (195)
Balance (2,748) (2,175)
Pension adjustment    
AOCI Roll Forward    
Balance (2,178) (1,936)
Change during period:    
Adoption of accounting standard (Note 1) (404)  
Before-tax amount (300) (390)
Tax benefit (expense) 66 85
Reclassification adjustment, net of taxes    
Amortization of net loss 68 63
Total activity for the period (570) (242)
Balance (2,748) (2,178)
Unrealized Gain (Loss) on Securities    
AOCI Roll Forward    
Balance 3 (44)
Change during period:    
Adoption of accounting standard (Note 1) (10)  
Before-tax amount 13 (20)
Tax benefit (expense) (3) 4
Reclassification adjustment, net of taxes    
Net realized gain (loss) (3) 63
Total activity for the period $ (3) 47
Balance   $ 3