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SECURITIES - Available for Sale (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025
--- | --- | ---
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | $ 1,455,355 | $ 1,518,129
Fair Value | 1,271,353 | 1,327,843
Amortized Cost |  |
Due in one year or less | 1,295 | 755
Due after one year through five years | 392 | 1,332
Due after five years through ten years | 27,332 | 27,688
Due after ten years | 339,944 | 358,948
Total | 368,963 | 388,723
Mortgage-backed securities | 1,086,392 | 1,129,406
Fair Value |  |
Due in one year or less | 1,305 | 760
Due after one year through five years | 399 | 1,352
Due after five years through ten years | 23,834 | 23,947
Due after ten years | 310,256 | 329,534
Total | 335,794 | 355,593
Mortgage-backed securities | 935,559 | 972,250
Corporate securities |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 25,000 | 25,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (3,500) | (3,750)
Fair Value | 21,500 | 21,250
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 0 | 0
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | 0 | 0
OVER 12 MONTHS, Gross Unrealized (Losses) | 21,500 | 21,250
OVER 12 MONTHS, Gross Unrealized (Losses) | (3,500) | (3,750)
TOTAL, Gross Unrealized (Losses) | 21,500 | 21,250
Unrealized (Losses), Total | (3,500) | (3,750)
SBA securities |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 11,425 | 11,791
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (1,092) | (1,022)
Fair Value | 10,333 | 10,769
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 0 | 0
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | 0 | 0
OVER 12 MONTHS, Gross Unrealized (Losses) | 10,332 | 10,769
OVER 12 MONTHS, Gross Unrealized (Losses) | (1,092) | (1,022)
TOTAL, Gross Unrealized (Losses) | 10,332 | 10,769
Unrealized (Losses), Total | (1,092) | (1,022)
Obligations of states and political subdivisions |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 162 | 162
Gross Unrealized Gains | 3 | 0
Gross Unrealized (Losses) | 0 | 0
Fair Value | 165 | 162
Non-bank qualified obligations of states and political subdivisions |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 202,501 | 213,072
Gross Unrealized Gains | 14 | 25
Gross Unrealized (Losses) | (26,718) | (26,057)
Fair Value | 175,797 | 187,040
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 0 | 0
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | 0 | 0
OVER 12 MONTHS, Gross Unrealized (Losses) | 174,258 | 185,089
OVER 12 MONTHS, Gross Unrealized (Losses) | (26,718) | (26,057)
TOTAL, Gross Unrealized (Losses) | 174,258 | 185,089
Unrealized (Losses), Total | (26,718) | (26,057)
Asset-backed securities |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 129,875 | 138,698
Gross Unrealized Gains | 10 | 21
Gross Unrealized (Losses) | (1,886) | (2,347)
Fair Value | 127,999 | 136,372
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 60,121 | 64,995
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | (1,234) | (556)
OVER 12 MONTHS, Gross Unrealized (Losses) | 63,297 | 66,263
OVER 12 MONTHS, Gross Unrealized (Losses) | (652) | (1,791)
TOTAL, Gross Unrealized (Losses) | 123,418 | 131,258
Unrealized (Losses), Total | (1,886) | (2,347)
Mortgage-backed securities |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 1,086,392 | 1,129,406
Gross Unrealized Gains | 82 | 57
Gross Unrealized (Losses) | (150,915) | (157,213)
Fair Value | 935,559 | 972,250
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 1,501 | 1,102
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | 0 | (2)
OVER 12 MONTHS, Gross Unrealized (Losses) | 923,813 | 965,549
OVER 12 MONTHS, Gross Unrealized (Losses) | (150,915) | (157,211)
TOTAL, Gross Unrealized (Losses) | 925,314 | 966,651
Unrealized (Losses), Total | (150,915) | (157,213)
Total debt securities AFS |  |
Available-for-sale debt securities [Abstract] |  |
Amortized Cost | 1,455,355 | 1,518,129
Gross Unrealized Gains | 109 | 103
Gross Unrealized (Losses) | (184,111) | (190,389)
Fair Value | 1,271,353 | 1,327,843
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
LESS THAN 12 MONTHS, Fair Value | 61,622 | 66,097
LESS THAN 12 MONTHS, Gross Unrealized (Losses) | (1,234) | (558)
OVER 12 MONTHS, Gross Unrealized (Losses) | 1,193,200 | 1,248,920
OVER 12 MONTHS, Gross Unrealized (Losses) | (182,877) | (189,831)
TOTAL, Gross Unrealized (Losses) | 1,254,822 | 1,315,017
Unrealized (Losses), Total | $ (184,111) | $ (190,389)

X
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