LOANS AND LEASES (Loan Portfolio Segment Balances) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 4,314,248	$ 3,927,808
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	497,948	467,286
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	455,829	456,657
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	857,196	775,552
Commercial Real Estate Portfolio Segment [Member] | Commercial Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,112,710	928,113
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition, Development and Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	292,443	308,279
Residential Portfolio Segment [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	921,435	841,692
Residential Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 176,687	$ 150,229