CREDIT QUALITY ASSESSMENT (Credit Quality of Loan Portfolio by Segment) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	$ 29,096	$ 26,336
Loans 90 days past due	1,987	225
Restructured loans	2,224	2,788
Total non-performing loans	33,307	29,349
Other real estate owned	2,118	2,253
Total non-performing assets	35,425	31,602
Commercial
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	6,352	6,703
Loans 90 days past due	150	0
Restructured loans	771	1,402
Total non-performing loans	7,273	8,105
Other real estate owned	39	39
Total non-performing assets	7,312	8,144
Consumer
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	4,098	2,967
Loans 90 days past due	563	0
Restructured loans	0	0
Total non-performing loans	4,661	2,967
Other real estate owned	0	0
Total non-performing assets	4,661	2,967
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	136	136
Loans 90 days past due	1,261	0
Restructured loans	0	0
Total non-performing loans	1,397	136
Other real estate owned	365	365
Total non-performing assets	1,762	501
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	5,861	5,575
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	5,861	5,575
Other real estate owned	497	0
Total non-performing assets	6,358	5,575
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	3,352	3,582
Loans 90 days past due	13	0
Restructured loans	0	496
Total non-performing loans	3,365	4,078
Other real estate owned	0	400
Total non-performing assets	3,365	4,478
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	9,134	7,196
Loans 90 days past due	0	225
Restructured loans	1,453	890
Total non-performing loans	10,587	8,311
Other real estate owned	1,217	1,449
Total non-performing assets	11,804	9,760
Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	163	177
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	163	177
Other real estate owned	0	0
Total non-performing assets	$ 163	$ 177