CREDIT QUALITY ASSESSMENT (Troubled Debt Restructured Loans for Specific Segments of the Loan Portfolio) (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Modifications [Line Items]
Restructured accruing	$ 500,000	$ 1,900,000
Troubled Debt Restructuring
Financing Receivable Modifications [Line Items]
Restructured accruing	508,000	1,243,000
Restructured non-accruing	22,000	639,000
Balance	530,000	1,882,000
Specific allowance	22,000	452,000
Restructured and subsequently defaulted	0	0
Troubled Debt Restructuring | Commercial
Financing Receivable Modifications [Line Items]
Restructured accruing	0	1,003,000
Restructured non-accruing	22,000	0
Balance	22,000	1,003,000
Specific allowance	22,000	303,000
Restructured and subsequently defaulted	0	0
Troubled Debt Restructuring | All Other
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	0	0
Balance	0	0
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment | Troubled Debt Restructuring | Commercial Acquisition, Development and Construction
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	0	0
Balance	0	0
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment | Troubled Debt Restructuring | Commercial Investor Real Estate
Financing Receivable Modifications [Line Items]
Restructured accruing	0	0
Restructured non-accruing	0	0
Balance	0	0
Specific allowance	0	0
Restructured and subsequently defaulted	0	0
Commercial Portfolio Segment | Troubled Debt Restructuring | Commercial Owner Occupied Real Estate
Financing Receivable Modifications [Line Items]
Restructured accruing	508,000	240,000
Restructured non-accruing	0	639,000
Balance	508,000	879,000
Specific allowance	0	149,000
Restructured and subsequently defaulted	$ 0	$ 0