LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred interest on loans, allowance for credit losses	$ 0		$ 214,000
Interest income on nonaccrual loans	0	$ 0
Loans modified that are not troubled debt restructurings	214,800	$ 220,800
Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring	41,800		76,600
Previous charge-offs	698		654
Allowance for loan losses allocated to troubled debt restructuring	2,500		10,500
Loan Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 53,100		$ 54,800