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	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	$ 14,189	$ 13,563
Impaired loans without a specific allowance	9,689	10,529
Impaired loans	23,878	24,092
Impaired Financing Receivable, Related Allowance	5,318	4,825
Unpaid principal balance in total impaired loans	36,697	39,016
Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,053
Impaired loans	1,053
Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	11,664	11,720
Impaired loans without a specific allowance	3,099	3,207
Impaired loans	14,763	14,927
Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	825	1,140
Impaired loans without a specific allowance	1,584	1,349
Impaired loans	2,409	2,489
Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	647	703
Impaired loans without a specific allowance	5,006	5,973
Impaired loans	5,653	6,676
Commercial
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	4,356	4,011
Impaired loans without a specific allowance	2,656	3,007
Impaired loans	7,012	7,018
Impaired Financing Receivable, Related Allowance	3,014	2,604
Unpaid principal balance in total impaired loans	7,863	10,082
Commercial | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,053
Impaired loans	1,053
Commercial | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,470	2,807
Impaired loans without a specific allowance	1,552	1,562
Impaired loans	4,022	4,369
Commercial | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	825	1,140
Impaired loans without a specific allowance	285	45
Impaired loans	1,110	1,185
Commercial | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	8	64
Impaired loans without a specific allowance	819	1,400
Impaired loans	827	1,464
All Other
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	2,910	3,263
Impaired loans	2,910	3,263
Impaired Financing Receivable, Related Allowance	0	0
Unpaid principal balance in total impaired loans	3,721	3,971
All Other | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans	0
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	0
Impaired loans	0	0
All Other | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	556	560
Impaired loans	556	560
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	2,354	2,703
Impaired loans	2,354	2,703
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	137	137
Impaired loans	137	137
Impaired Financing Receivable, Related Allowance	0	0
Unpaid principal balance in total impaired loans	4,398	4,398
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans	0
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	0
Impaired loans without a specific allowance	0	0
Impaired loans	0	0
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	137
Impaired loans	137	137
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	7,030	7,029
Impaired loans without a specific allowance	940	1,078
Impaired loans	7,970	8,107
Impaired Financing Receivable, Related Allowance	1,736	1,736
Unpaid principal balance in total impaired loans	12,661	12,805
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans	0
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	7,030	7,029
Impaired loans without a specific allowance	430	562
Impaired loans	7,460	7,591
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	0
Impaired loans	0	0
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	510	516
Impaired loans	510	516
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,803	2,523
Impaired loans without a specific allowance	3,046	3,044
Impaired loans	5,849	5,567
Impaired Financing Receivable, Related Allowance	568	485
Unpaid principal balance in total impaired loans	8,054	7,760
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0
Impaired loans	0
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,164	1,884
Impaired loans without a specific allowance	1,117	1,083
Impaired loans	3,281	2,967
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	743	744
Impaired loans	743	744
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	639
Impaired loans without a specific allowance	1,186	1,217
Impaired loans	$ 1,825	$ 1,856