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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Non Accrual Loans and Loans Past Due 90 Days Still on Accrual (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans past due 90 days or more and still accruing $ 0 $ 0
The Company maintains specific allowances for these loans of $80 in 2014 and $95 in 2013 44,216 45,129
Specific allowance on non accrual loans 11 0
Non-Traditional Mortgages (NTM)    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans past due 90 days or more and still accruing 0 0
The Company maintains specific allowances for these loans of $80 in 2014 and $95 in 2013 13,456 14,703
Traditional Loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Loans past due 90 days or more and still accruing 0 0
The Company maintains specific allowances for these loans of $80 in 2014 and $95 in 2013 $ 30,760 $ 30,426