FAIR VALUE - SCHEDULE OF QUANTITATIVE INFORMATION ABOUT LEVEL 3 FAIR VALUE MEASURMENTS (RECURRING) (Details) $ in Thousands	Mar. 31, 2025 USD ($) year	Jun. 30, 2024 USD ($) year
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	$ 79,958	$ 141,611
Available-for-sale Securities: Non-Agency MBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	29,301	110,928
Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	29,301	110,928
Servicing rights	27,585	28,924
Recurring
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	79,958	141,611
Servicing rights	27,585	28,924
Recurring \| Available-for-sale Securities: Non-Agency MBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	29,301	110,928
Recurring \| Level 3
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	29,301	110,928
Servicing rights	27,585	28,924
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS
Fair Value, Option, Quantitative Disclosures [Line Items]
Available-for-sale securities: Non-Agency MBS	$ 29,301	$ 110,928
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Prepayment Rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Prepayment Rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.300	0.721
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Prepayment Rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.153	0.380
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Default Rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Default Rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.030	0.137
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Constant Default Rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.018	0.028
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Loss Severity \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Loss Severity \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.689	0.689
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Projected Loss Severity \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.272	0.329
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Discount Rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.025	0.025
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Discount Rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.049	0.049
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Discount Rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.026	0.025
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Credit Enhancement \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.000	0.000
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Credit Enhancement \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.973	0.649
Recurring \| Level 3 \| Available-for-sale Securities: Non-Agency MBS \| Credit Enhancement \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available-for-sale, measurement input	0.237	0.228
Recurring \| Level 3 \| Servicing Rights
Fair Value, Option, Quantitative Disclosures [Line Items]
Servicing rights	$ 27,585	$ 28,924
Recurring \| Level 3 \| Servicing Rights \| Projected Constant Prepayment Rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.035	0.055
Recurring \| Level 3 \| Servicing Rights \| Projected Constant Prepayment Rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.262	0.952
Recurring \| Level 3 \| Servicing Rights \| Projected Constant Prepayment Rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.106	0.118
Recurring \| Level 3 \| Servicing Rights \| Discount Rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.095	0.095
Recurring \| Level 3 \| Servicing Rights \| Discount Rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.112	0.112
Recurring \| Level 3 \| Servicing Rights \| Discount Rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input	0.098	0.098
Recurring \| Level 3 \| Servicing Rights \| Life (in years) \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input \| year	2.3	0.4
Recurring \| Level 3 \| Servicing Rights \| Life (in years) \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input \| year	11.6	14.9
Recurring \| Level 3 \| Servicing Rights \| Life (in years) \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage servicing right, measurement input \| year	8.6	7.9

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 103
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-103

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-30

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-31

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-32

+ Details

Name:	us-gaap_FairValueOptionQuantitativeDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481229/860-50-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481260/860-50-45-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481260/860-50-45-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481260/860-50-45-2

+ Details

Name:	us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of input used to measure servicing asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_ServicingAssetMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_FinancialInstrumentAxis=ax_NonAgencyResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputConstantPrepaymentRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputLossSeverityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputEntityCreditRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=ax_MortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: