COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE-SHEET ACTIVITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risk, ratio of commitments to originate loans to commitments to sell	10.60%	42.30%
Margin deposits available as collateral	$ 260,100
Securities borrowed, financial collateral	134,339	$ 338,980
Securities loaned, financial collateral	159,832	474,400
Available securities used as collateral	114,200
Available securities used as collateral for OCC margin requirements	23,400
MUFG Union Bank v. Axos Bank
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Accrued litigation expense	16,000
Low income housing project partnerships
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to contribute capital	19,100	28,100
Loan origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan purchase commitment	2,917,600
Loan origination commitments \| Sales commitment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan origination commitment	24,900
Loan purchase and origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan origination commitment		$ 3,504,300
Fixed Interest Rate \| Loan origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan purchase commitment	$ 85,100
Off-balance sheet, fixed rate commitments to originate weighted-average rate	9.14%	5.75%
Fixed Interest Rate \| Loan origination commitments \| Sales commitment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan origination commitment		$ 8,400
Fixed Interest Rate \| Loan purchase and origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan purchase commitment		184,500
Adjustable Interest Rate \| Loan origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan purchase commitment	$ 2,832,500
Adjustable Interest Rate \| Loan purchase and origination commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet, loan purchase commitment		$ 3,319,800

Commitment to Extend Credit, Weighted Average Interest Rate

No definition available.

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- Definition

Off-balance Sheet Risk, Ratio of Commitments to Originate Loans to Commitments to Sell

+ References

No definition available.

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- Definition

Securities Loaned, Available Securities Used As Collateral, Right To Reclaim Securities

+ References

No definition available.

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- Definition

Securities Loaned, Collateral, OCC Margin Requirements

+ References

No definition available.

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- Definition

The face amount of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

No definition available.

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- Definition

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

No definition available.

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- 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

No definition available.

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- Definition

Amount of right to receive cash and securities on deposit with broker-dealers to demonstrate an intention to complete a purchase (good faith deposit) and collateral deposited by counterparty to cover the credit risk assumed (margin deposit).

+ References

No definition available.

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- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

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- Definition

Amount of obligation to return securities collateral under master netting arrangements that have not been offset against securities borrowed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 13
-SubTopic 20
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

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- Definition

Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities loaned.

+ References

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