CREDIT QUALITY ASSESSMENT (Credit Quality of Loan Portfolio by Segment) (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	$ 27,508	$ 29,211
Loans 90 days past due	226	232
Restructured loans	2,471	2,489
Total non-performing loans	30,205	31,932
Other real estate owned	1,448	1,911
Total non-performing assets	31,653	33,843
Commercial
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	6,091	5,833
Loans 90 days past due	0	0
Restructured loans	1,416	1,185
Total non-performing loans	7,507	7,018
Other real estate owned	39	39
Total non-performing assets	7,546	7,057
Consumer
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	3,152	2,859
Loans 90 days past due	1	0
Restructured loans	0	0
Total non-performing loans	3,153	2,859
Other real estate owned	0	0
Total non-performing assets	3,153	2,859
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	137	137
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	137	137
Other real estate owned	365	365
Total non-performing assets	502	502
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	5,589	8,107
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	5,589	8,107
Other real estate owned	0	395
Total non-performing assets	5,589	8,502
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	5,012	4,823
Loans 90 days past due	0	0
Restructured loans	505	744
Total non-performing loans	5,517	5,567
Other real estate owned	0	637
Total non-performing assets	5,517	6,204
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	7,345	7,257
Loans 90 days past due	225	232
Restructured loans	550	560
Total non-performing loans	8,120	8,049
Other real estate owned	1,044	475
Total non-performing assets	9,164	8,524
Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	182	195
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	182	195
Other real estate owned	0	0
Total non-performing assets	$ 182	$ 195