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SECURITIES (Tables)

6 Months Ended

Mar. 31, 2026

Investments, Debt and Equity Securities [Abstract]

Securities Available for Sale

The amortized cost, gross unrealized gains and losses and estimated fair values of debt securities available for sale ("AFS") and held to maturity ("HTM") are presented below.

(Dollars in thousands)			Amortized Cost			Gross Unrealized Gains			Gross Unrealized (Losses)			Fair Value
Debt Securities AFS
March 31, 2026
Corporate securities			$	25,000		$	—		$	(3,500)		$	21,500
SBA securities			11,425			—			(1,092)			10,333
Obligations of states and political subdivisions			162			3			—			165
Non-bank qualified obligations of states and political subdivisions			202,501			14			(26,718)			175,797
Asset-backed securities			129,875			10			(1,886)			127,999
Mortgage-backed securities			1,086,392			82			(150,915)			935,559
Total debt securities AFS			$	1,455,355		$	109		$	(184,111)		$	1,271,353
September 30, 2025
Corporate securities			$	25,000		$	—		$	(3,750)		$	21,250
SBA securities			11,791			—			(1,022)			10,769
Obligations of states and political subdivisions			162			—			—			162
Non-bank qualified obligations of states and political subdivisions			213,072			25			(26,057)			187,040
Asset-backed securities			138,698			21			(2,347)			136,372
Mortgage-backed securities			1,129,406			57			(157,213)			972,250
Total debt securities AFS			$	1,518,129		$	103		$	(190,389)		$	1,327,843
Debt Securities HTM
March 31, 2026
Non-bank qualified obligations of states and political subdivisions			$	26,264		$	—		$	(3,906)		$	22,358
Mortgage-backed securities			1,804			—			(201)			1,603
Total debt securities HTM			$	28,068		$	—		$	(4,107)		$	23,961
September 30, 2025
Non-bank qualified obligations of states and political subdivisions			$	27,373		$	—		$	(3,430)		$	23,943
Mortgage-backed securities			1,935			—			(225)			1,710
Total debt securities HTM			$	29,308		$	—		$	(3,655)		$	25,653

Schedule of Unrealized Loss on Investments, AFS

Gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous loss position, were as follows:

			LESS THAN 12 MONTHS									OVER 12 MONTHS									TOTAL
(Dollars in thousands)			Fair Value			Gross Unrealized (Losses)						Fair Value			Gross Unrealized (Losses)						Fair Value			Gross Unrealized (Losses)
Debt Securities AFS
March 31, 2026
Corporate securities			$	—		$	—					$	21,500		$	(3,500)					$	21,500		$	(3,500)
SBA securities			—			—						10,332			(1,092)						10,332			(1,092)
Non-bank qualified obligations of states and political subdivisions			—			—						174,258			(26,718)						174,258			(26,718)
Asset-backed securities			60,121			(1,234)						63,297			(652)						123,418			(1,886)
Mortgage-backed securities			1,501			—						923,813			(150,915)						925,314			(150,915)
Total debt securities AFS			$	61,622		$	(1,234)					$	1,193,200		$	(182,877)					$	1,254,822		$	(184,111)
September 30, 2025
Corporate securities			$	—		$	—					$	21,250		$	(3,750)					$	21,250		$	(3,750)
SBA securities			—			—						10,769			(1,022)						10,769			(1,022)
Non-bank qualified obligations of states and political subdivisions			—			—						185,089			(26,057)						185,089			(26,057)
Asset-backed securities			64,995			(556)						66,263			(1,791)						131,258			(2,347)
Mortgage-backed securities			1,102			(2)						965,549			(157,211)						966,651			(157,213)
Total debt securities AFS			$	66,097		$	(558)					$	1,248,920		$	(189,831)					$	1,315,017		$	(190,389)
Debt Securities HTM
March 31, 2026
Non-bank qualified obligations of states and political subdivisions			$	—		$	—					$	22,358		$	(3,906)					$	22,358		$	(3,906)
Mortgage-backed securities			—			—						1,603			(201)						1,603			(201)
Total debt securities HTM			$	—		$	—					$	23,961		$	(4,107)					$	23,961		$	(4,107)
September 30, 2025
Non-bank qualified obligations of states and political subdivisions			$	—		$	—					$	23,943		$	(3,430)					$	23,943		$	(3,430)
Mortgage-backed securities			—			—						1,710			(225)						1,710			(225)
Total debt securities HTM			$	—		$	—					$	25,653		$	(3,655)					$	25,653		$	(3,655)

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

The amortized cost and fair value of debt securities by contractual maturity are shown below. Certain securities have call features which allow the issuer to call the security prior to maturity. Expected maturities may differ from contractual maturities in MBS because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Therefore, MBS are not included in the maturity categories in the following maturity summary. The expected maturities of certain SBA securities may differ from contractual maturities because the borrowers may have the right to prepay the obligation. However, certain prepayment penalties may apply.

(Dollars in thousands)			March 31, 2026									September 30, 2025
Debt Securities AFS			Amortized Cost			Fair Value						Amortized Cost			Fair Value
Due in one year or less			$	1,295		$	1,305					$	755		$	760
Due after one year through five years			392			399						1,332			1,352
Due after five years through ten years			27,332			23,834						27,688			23,947
Due after ten years			339,944			310,256						358,948			329,534
			368,963			335,794						388,723			355,593
Mortgage-backed securities			1,086,392			935,559						1,129,406			972,250
Total debt securities AFS			$	1,455,355		$	1,271,353					$	1,518,129		$	1,327,843
Debt Securities HTM
Due after ten years			$	26,264		$	22,358					$	27,373		$	23,943
			26,264			22,358						27,373			23,943
Mortgage-backed securities			1,804			1,603						1,935			1,710
Total debt securities HTM			$	28,068		$	23,961					$	29,308		$	25,653

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-6

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-4

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Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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