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, 2019	Dec. 31, 2018
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	$ 14,498	$ 12,876
Allowance	4,777	4,924
Impaired loans without a specific allowance	7,159	9,334
Impaired loans	21,657	22,210
Unpaid principal balance in total impaired loans	31,897	35,121
Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	11,530	10,010
Impaired loans without a specific allowance	2,110	4,844
Impaired loans	13,640	14,854
Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	102	328
Impaired loans without a specific allowance	2,031	1,614
Impaired loans	2,133	1,942
Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	2,866	2,538
Impaired loans without a specific allowance	3,018	2,876
Impaired loans	5,884	5,414
Commercial
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	6,093	6,220
Allowance	2,945	3,594
Impaired loans without a specific allowance	1,254	1,366
Impaired loans	7,347	7,586
Unpaid principal balance in total impaired loans	9,840	11,056
Commercial | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	4,034	4,126
Impaired loans without a specific allowance	169	220
Impaired loans	4,203	4,346
Commercial | Restructuring | Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	102	328
Impaired loans without a specific allowance	162	172
Impaired loans	264	500
Commercial | Restructuring | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,957	1,766
Impaired loans without a specific allowance	923	974
Impaired loans	2,880	2,740
All Other
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	0	0
Allowance	0	0
Impaired loans without a specific allowance	1,370	1,729
Impaired loans	1,370	1,729
Unpaid principal balance in total impaired loans	2,725	3,081
All Other | Non Accrual Loans
Financing Receivable Impaired [Line Items]
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	1,094	1,442
Impaired loans	1,094	1,442
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	276	287
Impaired loans	276	287
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,261	0
Allowance	393	0
Impaired loans without a specific allowance	729	3,306
Impaired loans	1,990	3,306
Unpaid principal balance in total impaired loans	1,990	4,419
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	1,261	0
Impaired loans without a specific allowance	729	3,170
Impaired loans	1,990	3,170
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	0	136
Impaired loans	0	136
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	6,250	5,117
Allowance	1,413	1,207
Impaired loans without a specific allowance	934	238
Impaired loans	7,184	5,355
Unpaid principal balance in total impaired loans	11,744	9,909
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	5,468	5,117
Impaired loans without a specific allowance	159	238
Impaired loans	5,627	5,355
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	775	0
Impaired loans	775	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	782	0
Impaired loans without a specific allowance	0	0
Impaired loans	782	0
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	894	1,539
Allowance	26	123
Impaired loans without a specific allowance	2,872	2,695
Impaired loans	3,766	4,234
Unpaid principal balance in total impaired loans	5,598	6,656
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Non Accrual Loans
Financing Receivable Impaired [Line Items]
Impaired loans with a specific allowance	767	767
Impaired loans without a specific allowance	1,053	1,216
Impaired loans	1,820	1,983
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	0	0
Impaired loans	0	0
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	127	772
Impaired loans without a specific allowance	1,819	1,479
Impaired loans	$ 1,946	$ 2,251