LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 70,578	$ 101,735	$ 121,222	$ 750,400
Sales	$ 53,021	$ 12,396	$ 76,729	$ 535,832
Purchase price as a percentage of loans outstanding	95.90%	100.00%	97.50%	87.70%
Gain (loss) on sale of consumer loans	$ 0	$ 200	$ (200)	$ 200
Loss on sale of capital call lines of credit	0	0	0	5,037
Specialized lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	631,252
Sales	0	0	0	287,185
Capital calls lines of credit				670,000
Specialized lending | Loans Held-for-Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit				280,700
Specialized lending | Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit				389,300
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	602	4,977	8,005	15,285
Sales	0	6,725	23,708	54,083
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	2,867
Sales	0	5,671	0	24,522
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	4,238
Personal installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	69,976	0	113,217	0
Sales	53,021	0	53,021	0
Other installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	96,758	0	96,758
Sales	0	0	0	154,042
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 0	$ 0	$ 0	$ 16,000