LOANS AND LEASES - Loan Portfolio by Category (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 195,281	$ 186,126	$ 151,861	$ 94,507
Net loans and leases	12,996,218	12,583,202
Reverse mortgage, fair value	3,600	2,800	2,400
Financing Receivable Portfolio Segment, Including Reverse Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	13,191,499	12,769,328
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	965,051	870,705
Allowance for credit losses	5,566	5,483	4,668	3,352
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,086,393	2,012,134
Allowance for credit losses	49,333	58,543	53,320	23,088
Commercial and industrial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,656,174	2,540,070
Allowance for credit losses	57,131	49,394	49,526	43,987
Owner-occupied commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,973,645	1,886,087
Allowance for credit losses	9,139	10,719	6,019	4,574
Commercial mortgages | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4,030,627	3,801,180
Allowance for credit losses	48,962	36,055	21,473	11,623
Construction | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	832,093	1,035,530
Allowance for credit losses	9,185	10,762	6,987	1,903
Commercial small business leases | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	647,516	623,622
Allowance for credit losses	$ 15,965	$ 15,170	$ 9,868	$ 5,980