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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Troubled Debt Restructurings Additional Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
Loan
Sep. 30, 2016
USD ($)
Loan
Sep. 30, 2017
USD ($)
Loan
Sep. 30, 2016
USD ($)
Loan
Receivables [Abstract]        
Number of loans modified that had payments default during the period | Loan 0 3 1 5
Aggregate principal, loans modified that had payments default during the period | $ $ 0 $ 789 $ 124 $ 1,100