CREDIT QUALITY ASSESSMENT (Recorded Investment with Respect to Impaired loans, Associated Allowance by Applicable Portfolio Segment and Principal Balance of Impaired Loans prior to Amounts Charged-off) (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	$ 12,116	$ 14,208
Impaired loans without a specific allowance	12,181	14,719
Impaired loans	24,297	28,927
Impaired Financing Receivable, Related Allowance	3,652	3,375
Unpaid principal balance in total impaired loans	38,259	42,461
Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	10,560	12,536
Impaired loans without a specific allowance	3,427	5,035
Impaired loans	13,987	17,571
Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	833	876
Impaired loans without a specific allowance	1,679	3,591
Impaired loans	2,512	4,467
Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	723	796
Impaired loans without a specific allowance	7,075	6,093
Impaired loans	7,798	6,889
Commercial
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,424	2,200
Impaired loans without a specific allowance	2,919	3,073
Impaired loans	5,343	5,273
Impaired Financing Receivable, Related Allowance	1,884	1,318
Unpaid principal balance in total impaired loans	7,262	7,158
Commercial | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,507	1,168
Impaired loans without a specific allowance	1,148	974
Impaired loans	2,655	2,142
Commercial | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	833	876
Impaired loans without a specific allowance	370	701
Impaired loans	1,203	1,577
Commercial | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	84	156
Impaired loans without a specific allowance	1,401	1,398
Impaired loans	1,485	1,554
All Other
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	3,292	6,439
Impaired loans	3,292	6,439
Impaired Financing Receivable, Related Allowance	0	0
Unpaid principal balance in total impaired loans	3,984	7,154
All Other | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	0	2,750
Impaired loans	0	2,750
All Other | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	564	577
Impaired loans	564	577
All Other | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	2,728	3,112
Impaired loans	2,728	3,112
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	58
Impaired loans without a specific allowance	137	136
Impaired loans	137	194
Impaired Financing Receivable, Related Allowance	0	58
Unpaid principal balance in total impaired loans	4,398	4,456
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	58
Impaired loans without a specific allowance	0	0
Impaired loans	0	58
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	0	0
Impaired loans	0	0
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	137	136
Impaired loans	137	136
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	7,142	7,791
Impaired loans without a specific allowance	2,047	2,650
Impaired loans	9,189	10,441
Impaired Financing Receivable, Related Allowance	1,256	1,489
Unpaid principal balance in total impaired loans	13,864	15,138
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	7,142	7,791
Impaired loans without a specific allowance	525	518
Impaired loans	7,667	8,309
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	0	2,073
Impaired loans	0	2,073
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	1,522	59
Impaired loans	1,522	59
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,550	4,159
Impaired loans without a specific allowance	3,786	2,421
Impaired loans	6,336	6,580
Impaired Financing Receivable, Related Allowance	512	510
Unpaid principal balance in total impaired loans	8,751	8,555
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,911	3,519
Impaired loans without a specific allowance	1,754	793
Impaired loans	3,665	4,312
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	745	240
Impaired loans	745	240
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	639	640
Impaired loans without a specific allowance	1,287	1,388
Impaired loans	$ 1,926	$ 2,028