LOANS & ALLOWANCE FOR CREDIT LOSSES - SCHEDULE OF COMPOSITION OF LOAN PORTFOLIO (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 21,551,697	$ 19,802,811
Allowance for credit losses - loans	(290,049)	(260,542)	$ (166,680)	$ (148,617)
Unaccreted premiums (discounts) and loan fees	(212,038)	(310,884)
Total net loans	21,049,610	19,231,385
Single Family - Mortgage & Warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,395,278	4,178,832
Allowance for credit losses - loans	(12,111)	(16,943)	(17,503)	(19,670)
Multifamily and Commercial Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,940,739	3,861,931
Allowance for credit losses - loans	(26,240)	(70,771)	(16,848)	(14,655)
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,937,187	6,088,622
Allowance for credit losses - loans	(113,804)	(87,780)	(72,755)	(69,339)
Commercial & Industrial - Non-RE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,795,497	5,241,766
Allowance for credit losses - loans	(121,639)	(76,032)	(46,347)	(30,808)
Auto & Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	482,996	431,660
Allowance for credit losses - loans	$ (16,255)	$ (9,016)	$ (13,227)	$ (14,145)

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
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-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147481598/310-20-45-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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