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	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	$ 14,193	$ 13,563
Impaired loans without a specific allowance	10,410	10,529
Impaired loans	24,603	24,092
Impaired Financing Receivable, Related Allowance	5,772	4,825
Unpaid principal balance in total impaired loans	38,370	39,016
Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	896
Impaired loans	896
Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	11,658	11,720
Impaired loans without a specific allowance	3,930	3,207
Impaired loans	15,588	14,927
Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	992	1,140
Impaired loans without a specific allowance	1,577	1,349
Impaired loans	2,569	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	4,903	5,973
Impaired loans	5,550	6,676
Commercial
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	6,301	4,011
Impaired loans without a specific allowance	2,676	3,007
Impaired loans	8,977	7,018
Impaired Financing Receivable, Related Allowance	4,740	2,604
Unpaid principal balance in total impaired loans	10,926	10,082
Commercial | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	896
Impaired loans	896
Commercial | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	4,405	2,807
Impaired loans without a specific allowance	1,597	1,562
Impaired loans	6,002	4,369
Commercial | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	992	1,140
Impaired loans without a specific allowance	282	45
Impaired loans	1,274	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	797	1,400
Impaired loans	805	1,464
All Other
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Impaired loans without a specific allowance	2,888	3,263
Impaired loans	2,888	3,263
Impaired Financing Receivable, Related Allowance	0	0
Unpaid principal balance in total impaired loans	3,710	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	554	560
Impaired loans	554	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	2,334	2,703
Impaired loans	2,334	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	6,029	7,029
Impaired loans without a specific allowance	905	1,078
Impaired loans	6,934	8,107
Impaired Financing Receivable, Related Allowance	736	1,736
Unpaid principal balance in total impaired loans	11,514	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	6,029	7,029
Impaired loans without a specific allowance	426	562
Impaired loans	6,455	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	479	516
Impaired loans	479	516
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,863	2,523
Impaired loans without a specific allowance	3,804	3,044
Impaired loans	5,667	5,567
Impaired Financing Receivable, Related Allowance	296	485
Unpaid principal balance in total impaired loans	7,822	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	1,224	1,884
Impaired loans without a specific allowance	1,907	1,083
Impaired loans	3,131	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	741	744
Impaired loans	741	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	1,156	1,217
Impaired loans	$ 1,795	$ 1,856