<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.1.u1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>520</ContextCount>
  <ElementCount>358</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>73</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFINCOME</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000007 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000008 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - ACQUISITIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/ACQUISITIONS</Role>
      <ShortName>ACQUISITIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - FAIR VALUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUE</Role>
      <ShortName>FAIR VALUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - AVAILABLE-FOR-SALE SECURITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIES</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSES</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - DERIVATIVES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/DERIVATIVES</Role>
      <ShortName>DERIVATIVES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATION</Role>
      <ShortName>STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - EARNINGS PER COMMON SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/EARNINGSPERCOMMONSHARE</Role>
      <ShortName>EARNINGS PER COMMON SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - SEGMENT REPORTING AND REVENUE INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SEGMENTREPORTINGANDREVENUEINFORMATION</Role>
      <ShortName>SEGMENT REPORTING AND REVENUE INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - BORROWINGS, SUBORDINATED NOTES AND DEBENTURES</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://axosfinancial.com/role/BORROWINGSSUBORDINATEDNOTESANDDEBENTURES</Role>
      <ShortName>BORROWINGS, SUBORDINATED NOTES AND DEBENTURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9954471 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9954472 - Disclosure - ACQUISITIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/ACQUISITIONSTables</Role>
      <ShortName>ACQUISITIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/ACQUISITIONS</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9954473 - Disclosure - FAIR VALUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUETables</Role>
      <ShortName>FAIR VALUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/FAIRVALUE</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9954474 - Disclosure - AVAILABLE-FOR-SALE SECURITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESTables</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIES</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9954475 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESTables</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSES</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9954476 - Disclosure - DERIVATIVES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/DERIVATIVESTables</Role>
      <ShortName>DERIVATIVES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/DERIVATIVES</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9954477 - Disclosure - STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATIONTables</Role>
      <ShortName>STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATION</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9954478 - Disclosure - EARNINGS PER COMMON SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/EARNINGSPERCOMMONSHARETables</Role>
      <ShortName>EARNINGS PER COMMON SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/EARNINGSPERCOMMONSHARE</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9954479 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/COMMITMENTSANDCONTINGENCIESTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/COMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9954480 - Disclosure - SEGMENT REPORTING AND REVENUE INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SEGMENTREPORTINGANDREVENUEINFORMATIONTables</Role>
      <ShortName>SEGMENT REPORTING AND REVENUE INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/SEGMENTREPORTINGANDREVENUEINFORMATION</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9954481 - Disclosure - ACQUISITIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/ACQUISITIONSDetails</Role>
      <ShortName>ACQUISITIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/ACQUISITIONSTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9954482 - Disclosure - ACQUISITIONS - Schedule of Asset Acquisition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/ACQUISITIONSScheduleofAssetAcquisitionDetails</Role>
      <ShortName>ACQUISITIONS - Schedule of Asset Acquisition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9954483 - Disclosure - FAIR VALUE - ASSETS AND LIABILITIES MEASURED ON RECURRING BASIS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUEASSETSANDLIABILITIESMEASUREDONRECURRINGBASISDetails</Role>
      <ShortName>FAIR VALUE - ASSETS AND LIABILITIES MEASURED ON RECURRING BASIS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9954484 - Disclosure - FAIR VALUE - LEVEL 3 ASSETS MEASURED ON RECURRING BASIS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUELEVEL3ASSETSMEASUREDONRECURRINGBASISDetails</Role>
      <ShortName>FAIR VALUE - LEVEL 3 ASSETS MEASURED ON RECURRING BASIS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9954485 - Disclosure - FAIR VALUE - QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (RECURRING) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUEQUANTITATIVEINFORMATIONABOUTLEVEL3FAIRVALUEMEASURMENTSRECURRINGDetails</Role>
      <ShortName>FAIR VALUE - QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (RECURRING) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9954486 - Disclosure - FAIR VALUE - LOANS HELD-FOR-SALE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUELOANSHELDFORSALEDetails</Role>
      <ShortName>FAIR VALUE - LOANS HELD-FOR-SALE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9954487 - Disclosure - FAIR VALUE - ASSETS MEASURED FOR IMPAIRMENT ON NONRECURRING BASIS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUEASSETSMEASUREDFORIMPAIRMENTONNONRECURRINGBASISDetails</Role>
      <ShortName>FAIR VALUE - ASSETS MEASURED FOR IMPAIRMENT ON NONRECURRING BASIS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9954488 - Disclosure - FAIR VALUE - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUENARRATIVEDetails</Role>
      <ShortName>FAIR VALUE - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9954489 - Disclosure - FAIR VALUE - QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (NONRECURRING) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUEQUANTITATIVEINFORMATIONABOUTLEVEL3FAIRVALUEMEASURMENTSNONRECURRINGDetails</Role>
      <ShortName>FAIR VALUE - QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (NONRECURRING) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9954490 - Disclosure - FAIR VALUE - ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS AT PERIOD-END (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/FAIRVALUEESTIMATEDFAIRVALUESOFFINANCIALINSTRUMENTSATPERIODENDDetails</Role>
      <ShortName>FAIR VALUE - ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS AT PERIOD-END (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9954491 - Disclosure - AVAILABLE-FOR-SALE SECURITIES - AMORTIZED COST, CARRYING AMOUNT AND FAIR VALUE DISCLOSURES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESAMORTIZEDCOSTCARRYINGAMOUNTANDFAIRVALUEDISCLOSURESDetails</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES - AMORTIZED COST, CARRYING AMOUNT AND FAIR VALUE DISCLOSURES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9954492 - Disclosure - AVAILABLE-FOR-SALE SECURITIES - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESNARRATIVEDetails</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9954493 - Disclosure - AVAILABLE-FOR-SALE SECURITIES - SCHEDULE OF UNREALIZED LOSS ON INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESSCHEDULEOFUNREALIZEDLOSSONINVESTMENTSDetails</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES - SCHEDULE OF UNREALIZED LOSS ON INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9954494 - Disclosure - AVAILABLE-FOR-SALE SECURITIES - UNREALIZED GAIN (LOSS) ON INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESUNREALIZEDGAINLOSSONINVESTMENTSDetails</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES - UNREALIZED GAIN (LOSS) ON INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9954495 - Disclosure - AVAILABLE-FOR-SALE SECURITIES - INVESTMENTS CLASSIFIED BY CONTRACTUAL MATURITY DATE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/AVAILABLEFORSALESECURITIESINVESTMENTSCLASSIFIEDBYCONTRACTUALMATURITYDATEDetails</Role>
      <ShortName>AVAILABLE-FOR-SALE SECURITIES - INVESTMENTS CLASSIFIED BY CONTRACTUAL MATURITY DATE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9954496 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESNARRATIVEDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9954497 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - LOAN PORTFOLIO COMPOSITION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESLOANPORTFOLIOCOMPOSITIONDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - LOAN PORTFOLIO COMPOSITION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9954498 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - COMPONENTS OF THE PROVISION FOR CREDIT LOSSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESCOMPONENTSOFTHEPROVISIONFORCREDITLOSSESDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - COMPONENTS OF THE PROVISION FOR CREDIT LOSSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9954499 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE FOR LOAN LOSS BY PORTFOLIO CLASS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESALLOWANCEFORLOANLOSSBYPORTFOLIOCLASSDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE FOR LOAN LOSS BY PORTFOLIO CLASS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9954500 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE FOR LOAN LOSS AND RESERVE FOR UNFUNDED LOAN COMMITMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESALLOWANCEFORLOANLOSSANDRESERVEFORUNFUNDEDLOANCOMMITMENTSDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE FOR LOAN LOSS AND RESERVE FOR UNFUNDED LOAN COMMITMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9954501 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - REAL ESTATE LOANS, LTV RATIO (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESREALESTATELOANSLTVRATIODetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - REAL ESTATE LOANS, LTV RATIO (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9954502 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - UNPAID PRINCIPAL BALANCE FOR PERFORMING AND NONACCRUAL (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESUNPAIDPRINCIPALBALANCEFORPERFORMINGANDNONACCRUALDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - UNPAID PRINCIPAL BALANCE FOR PERFORMING AND NONACCRUAL (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9954503 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - LOANS BY AMORTIZED COST BASIS BY YEAR OF ORIGINATION AND CREDIT QUALITY INDICATOR (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESLOANSBYAMORTIZEDCOSTBASISBYYEAROFORIGINATIONANDCREDITQUALITYINDICATORDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - LOANS BY AMORTIZED COST BASIS BY YEAR OF ORIGINATION AND CREDIT QUALITY INDICATOR (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9954504 - Disclosure - LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - PAST DUE LOANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/LOANSALLOWANCEFORCREDITLOSSESPASTDUELOANSDetails</Role>
      <ShortName>LOANS &amp; ALLOWANCE FOR CREDIT LOSSES - PAST DUE LOANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9954505 - Disclosure - DERIVATIVES - Schedule of Fair Values and Notional Amounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/DERIVATIVESScheduleofFairValuesandNotionalAmountsDetails</Role>
      <ShortName>DERIVATIVES - Schedule of Fair Values and Notional Amounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9954506 - Disclosure - DERIVATIVES - Schedule of Gains (Losses) of Derivatives Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/DERIVATIVESScheduleofGainsLossesofDerivativesInstrumentsDetails</Role>
      <ShortName>DERIVATIVES - Schedule of Gains (Losses) of Derivatives Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9954507 - Disclosure - STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATIONNARRATIVEDetails</Role>
      <ShortName>STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATIONTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9954508 - Disclosure - STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - Common Stock Repurchases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATIONCommonStockRepurchasesDetails</Role>
      <ShortName>STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - Common Stock Repurchases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9954509 - Disclosure - STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - CHANGES IN RESTRICTED STOCK UNIT GRANTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/STOCKHOLDERSEQUITYANDSTOCKBASEDCOMPENSATIONCHANGESINRESTRICTEDSTOCKUNITGRANTSDetails</Role>
      <ShortName>STOCKHOLDERS??? EQUITY AND STOCK-BASED COMPENSATION - CHANGES IN RESTRICTED STOCK UNIT GRANTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9954510 - Disclosure - EARNINGS PER COMMON SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/EARNINGSPERCOMMONSHAREDetails</Role>
      <ShortName>EARNINGS PER COMMON SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/EARNINGSPERCOMMONSHARETables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9954511 - Disclosure - COMMITMENTS AND CONTINGENCIES - SCHEDULE OF MATURITIES OF LEASE LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/COMMITMENTSANDCONTINGENCIESSCHEDULEOFMATURITIESOFLEASELIABILITIESDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - SCHEDULE OF MATURITIES OF LEASE LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9954512 - Disclosure - COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/COMMITMENTSANDCONTINGENCIESNARRATIVEDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9954513 - Disclosure - SEGMENT REPORTING AND REVENUE INFORMATION - SEGMENT REPORTING INFORMATION, BY SEGMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SEGMENTREPORTINGANDREVENUEINFORMATIONSEGMENTREPORTINGINFORMATIONBYSEGMENTDetails</Role>
      <ShortName>SEGMENT REPORTING AND REVENUE INFORMATION - SEGMENT REPORTING INFORMATION, BY SEGMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9954514 - Disclosure - SEGMENT REPORTING AND REVENUE INFORMATION - NON-INTEREST INCOME (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://axosfinancial.com/role/SEGMENTREPORTINGANDREVENUEINFORMATIONNONINTERESTINCOMEDetails</Role>
      <ShortName>SEGMENT REPORTING AND REVENUE INFORMATION - NON-INTEREST INCOME (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ax-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9954515 - Disclosure - BORROWINGS, SUBORDINATED NOTES AND DEBENTURES (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://axosfinancial.com/role/BORROWINGSSUBORDINATEDNOTESANDDEBENTURESDetails</Role>
      <ShortName>BORROWINGS, SUBORDINATED NOTES AND DEBENTURES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://axosfinancial.com/role/BORROWINGSSUBORDINATEDNOTESANDDEBENTURES</ParentRole>
      <Position>64</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ax-20240331.htm">ax-20240331.htm</File>
    <File>ax-20240331.xsd</File>
    <File>ax-20240331_cal.xml</File>
    <File>ax-20240331_def.xml</File>
    <File>ax-20240331_lab.xml</File>
    <File>ax-20240331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ax-20240331_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="10">http://fasb.org/srt/2023</BaseTaxonomy>
    <BaseTaxonomy items="2098">http://fasb.org/us-gaap/2023</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
