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LOANS - Components of impaired loans (Details) - Impaired Loans - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Non-accrual loans, excluding troubled debt restructured loans $ 4,430 $ 5,450
Non-accrual troubled debt restructured loans 1,289 1,154
Accruing troubled debt restructured loans 6,801 7,482
Total impaired loans 12,520 14,086
Commitments to lend additional amounts to impaired borrowers