Annual report pursuant to Section 13 and 15(d)

OTHER COMPREHENSIVE INCOME (LOSS) (Details)

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OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Investment Securities Before Tax Amount [Abstract]      
Change in net unrealized gain/loss on securities available for sale before tax $ 409,000 $ 1,459,000 $ 828,000
Amortization of unrealized losses on securities transferred from available for sale to held to maturity before tax 55,000 73,000 82,000
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent (354,000) (1,386,000) (746,000)
Benefit Plans:      
Reclassification adjustment for amortization of prior service cost (199,000) (223,000) (278,000)
Reclassification adjustment for amortization of net loss 5,299,000 4,409,000 3,960,000
Current year actuarial (loss) gain (815,000) (3,470,000) (9,958,000)
Total Benefit Plans (4,683,000) (1,162,000) 5,720,000
Total Other Comprehensive Loss Before Tax 4,329,000 (224,000) (6,466,000)
Investment Securities Tax Expense (Benefit) [Abstract]      
Change in net unrealized gain/loss on securities available for sale tax expense (benefit) 103,000 564,000 322,000
Amortization of unrealized losses on securities transferred from available for sale to held to maturity tax expense (benefit) (14,000) (29,000) (32,000)
Other Comprehensive Income Loss Available For SaleSecurities Tax 89,000 535,000 290,000
Benefit Plans:      
Reclassification adjustment for amortization of prior service cost (50,000) (86,000) (107,000)
Reclassification adjustment for amortization of net loss (1,346,000) (1,622,000) (1,528,000)
Current year actuarial gain (loss) 207,000 1,159,000 3,843,000
Total Benefit Plans (1,189,000) (549,000) 2,208,000
Total Other Comprehensive Loss Tax (1,100,000) (14,000) 2,498,000
Investment Securities Net of Tax Amount [Abstract]      
Change in net unrealized gain/loss on securities available for sale Net of Tax amount (306,000) (895,000) (506,000)
Amortization of unrealized losses on securities transferred from available for sale to held to maturity net of tax 41,000 44,000 50,000
Total other comprehensive income (loss) Net of Tax (265,000) (851,000) (456,000)
Benefit Plans:      
Reclassification adjustment for amortization of prior service cost 149,000 137,000 171,000
Reclassification adjustment for amortization of net loss 3,953,000 2,787,000 2,432,000
Current year actuarial gain (loss) (608,000) (2,311,000) (6,115,000)
Total Benefit Plans 3,494,000 613,000 (3,512,000)
Total Other Comprehensive Loss After Tax $ 3,229,000 $ (238,000) $ (3,968,000)