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SECURITIES - Schedule of Securities Available (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Securities AFS |  |
Amortized Cost | $ 1,518,129 | $ 1,944,298
Fair Value | 1,327,843 | 1,741,221
Amortized Cost |  |
Due in one year or less | 755 | 1,826
Due after one year through five years | 1,332 | 14,772
Due after five years through ten years | 27,688 | 70,894
Due after ten years | 358,948 | 463,257
Total Amortized Cost | 388,723 | 550,749
Mortgage-backed securities | 1,129,406 | 1,393,549
Amortized Cost | 1,518,129 | 1,944,298
Fair Value |  |
Due in one year or less | 760 | 1,796
Due after one year through five years | 1,352 | 14,211
Due after five years through ten years | 23,947 | 63,636
Due after ten years | 329,534 | 430,210
Total Fair Value | 355,593 | 509,853
Mortgage-backed securities | 972,250 | 1,231,368
Total debt securities AFS | 1,327,843 | 1,741,221
Securities HTM |  |
Amortized Cost | 29,308 | 33,092
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (3,655) | (2,856)
Fair Value | 25,653 | 30,236
Held-to-maturity 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, Fair Value | 25,653 | 30,236
OVER 12 MONTHS, Gross Unrealized (Losses) | (3,655) | (2,856)
TOTAL, Fair Value | 25,653 | 30,236
TOTAL, Gross Unrealized (Losses) | (3,655) | (2,856)
Amortized Cost |  |
Due after ten years | 27,373 | 31,060
Total | 27,373 | 31,060
Mortgage-backed securities | 1,935 | 2,032
Total debt securities HTM | 29,308 | 33,092
Fair Value |  |
Due after ten years | 23,943 | 28,392
Total | 23,943 | 28,392
Mortgage-backed securities | 1,710 | 1,844
Fair Value | 25,653 | 30,236
Corporate securities |  |
Securities AFS |  |
Amortized Cost | 25,000 | 25,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (3,750) | (5,250)
Fair Value | 21,250 | 19,750
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 0 | 0
Unrealized (Losses), Less than 12 months | 0 | 0
Fair Value, 12 Months or Longer | 21,250 | 19,750
Unrealized (Losses), 12 Months or Longer | (3,750) | (5,250)
Fair Value, Total | 21,250 | 19,750
Unrealized (Losses), Total | (3,750) | (5,250)
Amortized Cost |  |
Amortized Cost | 25,000 | 25,000
Fair Value |  |
Total debt securities AFS | 21,250 | 19,750
SBA securities |  |
Securities AFS |  |
Amortized Cost | 11,791 | 86,036
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (1,022) | (4,101)
Fair Value | 10,769 | 81,935
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 0 | 0
Unrealized (Losses), Less than 12 months | 0 | 0
Fair Value, 12 Months or Longer | 10,769 | 81,935
Unrealized (Losses), 12 Months or Longer | (1,022) | (4,101)
Fair Value, Total | 10,769 | 81,935
Unrealized (Losses), Total | (1,022) | (4,101)
Amortized Cost |  |
Amortized Cost | 11,791 | 86,036
Fair Value |  |
Total debt securities AFS | 10,769 | 81,935
Obligations of states and political subdivisions |  |
Securities AFS |  |
Amortized Cost | 162 | 501
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | 0 | (21)
Fair Value | 162 | 480
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months |  | 0
Unrealized (Losses), Less than 12 months |  | 0
Fair Value, 12 Months or Longer |  | 280
Unrealized (Losses), 12 Months or Longer |  | (21)
Fair Value, Total |  | 280
Unrealized (Losses), Total |  | (21)
Amortized Cost |  |
Amortized Cost | 162 | 501
Fair Value |  |
Total debt securities AFS | 162 | 480
Non-bank qualified obligations of states and political subdivisions |  |
Securities AFS |  |
Amortized Cost | 213,072 | 246,233
Gross Unrealized Gains | 25 | 44
Gross Unrealized (Losses) | (26,057) | (28,287)
Fair Value | 187,040 | 217,990
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 0 | 0
Unrealized (Losses), Less than 12 months | 0 | 0
Fair Value, 12 Months or Longer | 185,089 | 215,956
Unrealized (Losses), 12 Months or Longer | (26,057) | (28,287)
Fair Value, Total | 185,089 | 215,956
Unrealized (Losses), Total | (26,057) | (28,287)
Amortized Cost |  |
Amortized Cost | 213,072 | 246,233
Fair Value |  |
Total debt securities AFS | 187,040 | 217,990
Securities HTM |  |
Amortized Cost | 27,373 | 31,060
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (3,430) | (2,668)
Fair Value | 23,943 | 28,392
Held-to-maturity 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, Fair Value | 23,943 | 28,392
OVER 12 MONTHS, Gross Unrealized (Losses) | (3,430) | (2,668)
TOTAL, Fair Value | 23,943 | 28,392
TOTAL, Gross Unrealized (Losses) | (3,430) | (2,668)
Amortized Cost |  |
Total debt securities HTM | 27,373 | 31,060
Fair Value |  |
Fair Value | 23,943 | 28,392
Asset-backed securities |  |
Securities AFS |  |
Amortized Cost | 138,698 | 192,979
Gross Unrealized Gains | 21 | 337
Gross Unrealized (Losses) | (2,347) | (3,618)
Fair Value | 136,372 | 189,698
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 64,995 | 52,101
Unrealized (Losses), Less than 12 months | (556) | (176)
Fair Value, 12 Months or Longer | 66,263 | 88,576
Unrealized (Losses), 12 Months or Longer | (1,791) | (3,442)
Fair Value, Total | 131,258 | 140,677
Unrealized (Losses), Total | (2,347) | (3,618)
Amortized Cost |  |
Amortized Cost | 138,698 | 192,979
Fair Value |  |
Total debt securities AFS | 136,372 | 189,698
Mortgage-backed securities |  |
Securities AFS |  |
Amortized Cost | 1,129,406 | 1,393,549
Gross Unrealized Gains | 57 | 84
Gross Unrealized (Losses) | (157,213) | (162,265)
Fair Value | 972,250 | 1,231,368
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 1,102 | 2,377
Unrealized (Losses), Less than 12 months | (2) | (15)
Fair Value, 12 Months or Longer | 965,549 | 1,215,781
Unrealized (Losses), 12 Months or Longer | (157,211) | (162,250)
Fair Value, Total | 966,651 | 1,218,158
Unrealized (Losses), Total | (157,213) | (162,265)
Amortized Cost |  |
Amortized Cost | 1,129,406 | 1,393,549
Fair Value |  |
Total debt securities AFS | 972,250 | 1,231,368
Securities HTM |  |
Amortized Cost | 1,935 | 2,032
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | (225) | (188)
Fair Value | 1,710 | 1,844
Held-to-maturity 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, Fair Value | 1,710 | 1,844
OVER 12 MONTHS, Gross Unrealized (Losses) | (225) | (188)
TOTAL, Fair Value | 1,710 | 1,844
TOTAL, Gross Unrealized (Losses) | (225) | (188)
Amortized Cost |  |
Total debt securities HTM | 1,935 | 2,032
Fair Value |  |
Fair Value | 1,710 | 1,844
Total debt securities AFS |  |
Securities AFS |  |
Amortized Cost | 1,518,129 | 1,944,298
Gross Unrealized Gains | 103 | 465
Gross Unrealized (Losses) | (190,389) | (203,542)
Fair Value | 1,327,843 | 1,741,221
Available-for-sale securities in a continuous unrealized loss position [Abstract] |  |
Fair Value, Less than 12 months | 66,097 | 54,478
Unrealized (Losses), Less than 12 months | (558) | (191)
Fair Value, 12 Months or Longer | 1,248,920 | 1,622,278
Unrealized (Losses), 12 Months or Longer | (189,831) | (203,351)
Fair Value, Total | 1,315,017 | 1,676,756
Unrealized (Losses), Total | (190,389) | (203,542)
Amortized Cost |  |
Amortized Cost | 1,518,129 | 1,944,298
Fair Value |  |
Total debt securities AFS | $ 1,327,843 | $ 1,741,221

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