LOANS (Loan Portfolio Segment Balances) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 6,596,548	$ 6,571,634
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	772,619	796,264
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	480,530	517,839
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,278,505	1,202,903
Commercial Real Estate Portfolio Segment [Member] | Commercial Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,036,021	1,958,395
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition, Development and Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	678,906	681,201
Residential Portfolio Segment [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,199,275	1,228,247
Residential Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 150,692	$ 186,785