v3.26.1
Securities (Tables)
 6 Months Ended
Mar. 31, 2026
Marketable Securities [Abstract]  
Amortized Cost, Estimated Fair Value, and Gross Unrealized Gains and Losses Of AFS Securities
The following tables reflect the amortized cost, estimated fair value, and gross unrealized gains and losses of AFS securities at the dates presented. The Company did not hold any tax-exempt securities during the six months ended March 31, 2026 or 2025.
March 31, 2026
GrossGrossEstimated
AmortizedUnrealizedUnrealizedFair
CostGainsLossesValue
 (Dollars in thousands)
MBS$791,659 $14,642 $550 $805,751 
Corporate bonds4,000 — 185 3,815 
$795,659 $14,642 $735 $809,566 

September 30, 2025
GrossGrossEstimated
AmortizedUnrealizedUnrealizedFair
CostGainsLossesValue
(Dollars in thousands)
MBS$843,369 $20,303 $172 $863,500 
Corporate bonds4,000 — 284 3,716 
$847,369 $20,303 $456 $867,216 
Schedule Of Estimated Fair Value And Gross Unrealized Losses Of Securities In Continuous Unrealized Loss Position
The following tables summarize the estimated fair value and gross unrealized losses of those AFS securities on which an unrealized loss at the dates presented was reported and the continuous unrealized loss position for less than 12 months and equal to or greater than 12 months as of the dates presented.
March 31, 2026
Less Than 12 MonthsEqual to or Greater Than 12 Months
EstimatedUnrealizedEstimatedUnrealized
Fair ValueLossesFair ValueLosses
 (Dollars in thousands)
MBS$54,007 $480 $5,199 $70 
Corporate bonds— — 3,815 185 
$54,007 $480 $9,014 $255 

September 30, 2025
Less Than 12 MonthsEqual to or Greater Than 12 Months
EstimatedUnrealizedEstimatedUnrealized
Fair ValueLossesFair ValueLosses
 (Dollars in thousands)
MBS$13,946 $55 $26,144 $117 
Corporate bonds— — 3,716 284 
$13,946 $55 $29,860 $401 
Schedule Of Contractual Maturities
The amortized cost and estimated fair value of AFS debt securities as of March 31, 2026, by contractual maturity, are shown below.  Actual principal repayments may differ from contractual maturities due to prepayment or early call privileges by the issuer. In the case of MBS, borrowers on the underlying loans generally have the right to prepay their loans without penalty. For this reason, MBS are not included in the maturity categories in the table below.
AmortizedEstimated
CostFair Value
(Dollars in thousands)
Five years through ten years$4,000 $3,815 
4,000 3,815 
MBS791,659 805,751 
$795,659 $809,566 
Schedule Of Carrying Value Of Securities Pledged As Collateral
The following table summarizes the carrying value of securities pledged as collateral for the obligations indicated below as of the dates presented.
March 31, 2026September 30, 2025
(Dollars in thousands)
Federal Reserve Bank of Kansas City ("FRB of Kansas City") borrowings$103,752 $91,130 
Public unit deposits99,018 150,916 
$202,770 $242,046