PORTFOLIO LOANS - Schedule of Distribution of Portfolio Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	$ 13,567,799	$ 7,697,087
ACL	(174,023)	(83,404)	$ (91,740)	$ (91,608)
Portfolio loans, net	13,393,776	7,613,683
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	10,818,515	5,552,288
Commercial loans | C&I and other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	4,229,208	1,904,515
ACL	(61,370)	(21,589)	(21,256)	(23,860)
Commercial loans | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	5,550,018	3,269,564
ACL	(70,328)	(32,301)	(35,465)	(38,299)
Commercial loans | Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	1,039,289	378,209
ACL	(11,568)	(3,345)	(5,163)	(6,457)
Retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	2,749,284	2,144,799
Retail loans | CRE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	2,154,616	1,696,457
ACL	(29,178)	(23,711)	(26,298)	(18,193)
Retail loans | Retail other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total portfolio loans	594,668	448,342
ACL	$ (1,579)	$ (2,458)	$ (3,558)	$ (4,799)