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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 43,241	$ 636,115	$ 50,644	$ 648,665
Sales	$ 23,708	$ 523,436	$ 23,708	$ 523,436
Purchase price as a percentage of loans outstanding	99.50%	85.10%	99.60%	85.50%
Gain (loss) on sale of consumer loans	$ 200	$ (400)	$ 200	$ (400)
Loss on sale of capital call lines of credit	0	5,037	0	5,037
Specialized lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	631,252	0	631,252
Sales	0	287,185	0	287,185
Capital calls lines of credit		670,000		670,000
Specialized lending | Loans Held-for-Investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit		280,700		280,700
Specialized lending | Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Capital calls lines of credit		389,300		389,300
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	4,863	7,403	10,308
Sales	23,708	47,358	23,708	47,358
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	2,867
Sales	0	18,851	0	18,851
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	0	0	4,238
Personal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	43,241	0	43,241	0
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	0	16,000	0	16,000
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales	$ 0	$ 154,042	$ 0	$ 154,042