Borrowings (Tables)

12 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Maturity dates of Outstanding FHLB Advances

The table below shows the contractual maturity dates of outstanding FHLB advances. 

	September 30, 2023		September 30, 2022
	(In thousands)
Within 1 year	$	2,900,000	$	2,025,000
1 to 3 years	—		100,000
	$	2,900,000	$	2,125,000

Schedule of Weighted Average Cost and Amount of Advances

Financial information pertaining to the weighted-average cost and the amount of FHLB advances were as follows.

 

	2023			2022			2021
	($ in thousands)
Weighted average interest rate, including cash flow hedges, at end of year	3.83		%	2.02		%	1.51		%
Weighted daily average interest rate, including cash flow hedges, during the year	3.42		%	1.66		%	1.98		%
Daily average of FHLB advances during the year	$	2,916,849		$	1,731,110		$	2,234,027
Maximum amount of FHLB advances at any month end	$	3,425,000		$	2,125,000		$	2,700,000
Interest expense during the year (including swap interest income and expense)	$	99,631		$	28,729		$	44,188