CREDIT QUALITY ASSESSMENT (Credit Quality of Loan Portfolio) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	$ 17,136	$ 11,787
Non-accrual loans and leases	31,378	30,031
Current loans	3,511,345	3,452,701
Total loans and leases	3,560,688	3,495,370
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	829	851
Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,113	523
Non-accrual loans and leases	3,741	3,696
Current loans	445,841	461,002
Total loans and leases	451,239	465,765
Commercial | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	544	544
Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
Non-accrual loans and leases	0	0
Current loans	0	0
Total loans and leases	0	0
Leases | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	2,278	2,192
Non-accrual loans and leases	2,715	2,193
Current loans	442,205	446,490
Total loans and leases	447,198	450,875
Consumer | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
Non-accrual loans and leases	147	194
Current loans	261,057	255,786
Total loans and leases	261,204	255,980
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,302	2,816
Non-accrual loans and leases	7,885	8,368
Current loans	773,974	707,900
Total loans and leases	783,161	719,084
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,068	2,668
Non-accrual loans and leases	7,149	6,340
Current loans	667,058	668,712
Total loans and leases	675,560	678,027
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	285	307
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	11,375	3,588
Non-accrual loans and leases	9,329	8,822
Current loans	783,401	783,948
Total loans and leases	804,105	796,358
Residential Real Estate Portfolio Segment | Residential Mortgage | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
Non-accrual loans and leases	412	418
Current loans	137,809	128,863
Total loans and leases	138,221	129,281
Residential Real Estate Portfolio Segment | Residential Construction | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans aquired with deteriorated credit quality	0	0
31-60 days
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	15,383	6,798
31-60 days | Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	603	119
31-60 days | Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
31-60 days | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,644	1,642
31-60 days | Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
31-60 days | Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,302	616
31-60 days | Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,068	1,819
31-60 days | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	10,766	2,602
31-60 days | Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
61-90 days
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,752	4,989
61-90 days | Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	510	404
61-90 days | Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
61-90 days | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	633	550
61-90 days | Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
61-90 days | Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	2,200
61-90 days | Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	849
61-90 days | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	609	986
61-90 days | Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1	0
> 90 days | Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1	0
> 90 days | Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	0	0
> 90 days | Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	$ 0	$ 0