Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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OTHER BORROWINGS, FHLB Advances (Details) - USD ($)	Sep. 30, 2022	Sep. 30, 2021
FHLB advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Aggregate principal amount of the notes		$ 850,000,000
Weighted Average
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances weighted average interest rate	3.29%	0.26%
FHLB Advance Maturing December 2023
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances	$ 850,000,000
FHLB Advance Maturing May 2023
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances	140,000,000
FHLB Advance Maturing December 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances	$ 200,000,000
FHLB advances weighted average interest rate	3.45%