CREDIT QUALITY ASSESSMENT (Credit Quality of Loan Portfolio) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	$ 14,762	$ 11,787
Non-accrual loans and leases	29,211	30,031
Current loans	3,883,835	3,453,552
Total loans and leases	3,927,808	3,495,370
Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,335	523
Non-accrual loans and leases	5,833	3,696
Current loans	460,118	461,546
Total loans and leases	467,286	465,765
Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases		0
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,912	2,192
Non-accrual loans and leases	2,859	2,193
Current loans	451,886	446,490
Total loans and leases	456,657	450,875
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	896	0
Non-accrual loans and leases	137	194
Current loans	307,246	255,786
Total loans and leases	308,279	255,980
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	2,056	2,816
Non-accrual loans and leases	8,107	8,368
Current loans	917,950	707,900
Total loans and leases	928,113	719,084
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	2,223	2,668
Non-accrual loans and leases	4,823	6,340
Current loans	768,506	669,019
Total loans and leases	775,552	678,027
Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	6,340	3,588
Non-accrual loans and leases	7,257	8,822
Current loans	828,095	783,948
Total loans and leases	841,692	796,358
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	195	418
Current loans	150,034	128,863
Total loans and leases	150,229	129,281
31-60 days
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	8,665	6,798
31-60 days | Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	663	119
31-60 days | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	808	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	896	0
31-60 days | Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	850	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	1,479	1,819
31-60 days | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	3,969	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	5,865	4,989
61-90 days | Commercial
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	672	404
61-90 days | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	1,104	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	1,206	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	744	849
61-90 days | Residential Real Estate Portfolio Segment | Residential Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	2,139	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	232	0
> 90 days | Commercial
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	0	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	232	0
> 90 days | Residential Real Estate Portfolio Segment | Residential Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Total past due	$ 0	$ 0