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ALLOWANCE FOR LOAN AND LEASE LOSSES (Impaired Loans) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Changes in the allowance for loan and lease losses for impaired loans      
Balance, beginning of year $ 0 $ 51 $ 1,533
Provision for loan and lease losses 0 0 51
Other changes 0 (51) (1,533)
Balance, end of year $ 0 $ 0 $ 51