CREDIT QUALITY ASSESSMENT (Credit Quality of Loan Portfolio by Segment) (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	$ 26,588	$ 26,336
Loans 90 days past due	126	225
Restructured loans	2,678	2,788
Total non-performing loans	29,392	29,349
Other real estate owned	2,761	2,253
Total non-performing assets	32,153	31,602
Commercial
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	6,634	6,703
Loans 90 days past due	0	0
Restructured loans	1,310	1,402
Total non-performing loans	7,944	8,105
Other real estate owned	0	39
Total non-performing assets	7,944	8,144
Consumer
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	3,244	2,967
Loans 90 days past due	126	0
Restructured loans	0	0
Total non-performing loans	3,370	2,967
Other real estate owned	0	0
Total non-performing assets	3,370	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	0	0
Restructured loans	0	0
Total non-performing loans	136	136
Other real estate owned	365	365
Total non-performing assets	501	501
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	5,813	5,575
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	5,813	5,575
Other real estate owned	497	0
Total non-performing assets	6,310	5,575
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	3,524	3,582
Loans 90 days past due	0	0
Restructured loans	485	496
Total non-performing loans	4,009	4,078
Other real estate owned	400	400
Total non-performing assets	4,409	4,478
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	7,063	7,196
Loans 90 days past due	0	225
Restructured loans	883	890
Total non-performing loans	7,946	8,311
Other real estate owned	1,499	1,449
Total non-performing assets	9,445	9,760
Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans	174	177
Loans 90 days past due	0	0
Restructured loans	0	0
Total non-performing loans	174	177
Other real estate owned	0	0
Total non-performing assets	$ 174	$ 177