LOANS (Loan Portfolio Segment Balances) (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 10,343,043	$ 6,705,232
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,222,810	801,019
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	558,434	466,764
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied RE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,601,803	1,288,677
Commercial Real Estate Portfolio Segment [Member] | Commercial Investor RE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,581,778	2,169,156
Commercial Real Estate Portfolio Segment [Member] | Commercial AD&C [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	997,423	684,010
Residential Portfolio Segment [Member] | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,211,745	1,149,327
Residential Portfolio Segment [Member] | Residential Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 169,050	$ 146,279