LOANS (Narrative) (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 65,400,000	$ 49,100,000
Unfunded commitments	$ 43,000
Number of loans classified as doubtful | loan	0	0
Number of loans classified as loss | loan	0	0
Total loans receivable held to maturity	$ 12,068,645,000	$ 11,428,352,000
Increase in allowance	122,566,000	$ 109,483,000
Loans secured by real estate property in process of foreclosure	$ 127,000
Loans delinquent 30-89 days as a percentage of total loans	0.09%	0.04%
Interest income on nonaccrual loans	$ 0	$ 0
Nonaccrual loans with no related allowance	52,500,000	26,700,000
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable held to maturity	254,052,000	277,975,000
PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in allowance	0
PPP | Nonpass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable held to maturity	$ 136,000	$ 2,700,000