LOANS - Loan Portfolio Segment Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 11,483,921	$ 11,366,989
Commercial investor real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,933,329	5,104,425
Commercial owner-occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,747,708	1,755,235
Commercial AD&C
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,184,296	988,967
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,521,890	1,474,521
Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	78,027	121,419
Commercial real estate: | Commercial investor real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,933,329	5,104,425
Commercial real estate: | Commercial owner-occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,747,708	1,755,235
Commercial real estate: | Commercial AD&C
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,184,296	988,967
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,466,843	9,353,507
Commercial business | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,601,510	1,504,880
Residential real estate: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,521,890	1,474,521
Residential real estate: | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	78,027	121,419
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	417,161	417,542
Total residential and consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 2,017,078	$ 2,013,482