LOANS & ALLOWANCE FOR CREDIT LOSSES - LOANS BY AMORTIZED COST BASIS BY YEAR OF ORIGINATION AND CREDIT QUALITY INDICATOR (Details) - USD ($) $ in Thousands	9 Months Ended
Mar. 31, 2024	Jun. 30, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 3,036,168	$ 3,842,206
2023	3,500,589	5,386,784
2022	4,589,565	1,816,171
2021	1,519,199	867,067
2020	961,708	665,377
Prior	1,808,264	1,156,389
Revolving Loans	3,901,469	2,918,032
Total	19,316,962	$ 16,652,026
Gross charge-offs
2024	50
2023	2,664
2022	3,969
2021	1,294
2020	307
Prior	489
Revolving Loans	0
Total	$ 8,773
As a % of total gross loans
2024	15.72%	23.07%
2023	18.12%	32.35%
2022	23.76%	10.91%
2021	7.86%	5.21%
2020	4.98%	4.00%
Prior	9.36%	6.94%
Revolving Loans	20.20%	17.52%
Total	100.00%	100.00%
Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 405,277	$ 730,498
2023	629,957	1,359,272
2022	1,274,691	534,585
2021	497,858	347,145
2020	324,660	270,513
Prior	831,174	682,031
Revolving Loans	159,109	249,789
Total	4,122,726	4,173,833
Gross charge-offs
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	170
Revolving Loans	0
Total	170
Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2024	33,500	558,787
2023	771,243	988,022
2022	1,098,533	509,066
2021	655,391	354,600
2020	582,477	238,478
Prior	859,912	433,272
Revolving Loans	0	0
Total	4,001,056	3,082,225
Gross charge-offs
2024	0
2023	0
2022	0
2021	0
2020	139
Prior	0
Revolving Loans	0
Total	139
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1,599,913	1,896,476
2023	1,468,905	2,395,722
2022	1,651,051	669,451
2021	268,071	114,016
2020	22,741	134,215
Prior	83,339	29,914
Revolving Loans	818,968	960,024
Total	5,912,988	6,199,818
Gross charge-offs
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	0
Revolving Loans	0
Total	0
Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2024	953,015	488,120
2023	504,717	384,197
2022	367,210	30,809
2021	47,348	26,207
2020	15,835	2,098
Prior	16,014	0
Revolving Loans	2,923,392	1,708,219
Total	4,827,531	2,639,650
Gross charge-offs
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	86
Revolving Loans	0
Total	86
Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	44,442	162,604
2023	125,767	257,571
2022	198,080	70,909
2021	49,546	25,099
2020	15,995	20,073
Prior	16,935	10,008
Revolving Loans	0	0
Total	450,765	546,264
Gross charge-offs
2024	50
2023	2,664
2022	3,969
2021	1,294
2020	168
Prior	233
Revolving Loans	0
Total	8,378
Other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	21	5,721
2023	0	2,000
2022	0	1,351
2021	985	0
2020	0	0
Prior	890	1,164
Revolving Loans	0	0
Total	1,896	10,236
Gross charge-offs
2024	0
2023	0
2022	0
2021	0
2020	0
Prior	0
Revolving Loans	0
Total	0
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	3,005,016	3,812,433
2023	3,434,231	5,259,453
2022	4,430,576	1,754,423
2021	1,463,515	765,600
2020	877,922	620,062
Prior	1,680,382	1,054,716
Revolving Loans	3,852,256	2,910,818
Total	18,743,898	16,177,505
Pass \| Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2024	374,277	730,498
2023	629,673	1,346,804
2022	1,267,368	522,873
2021	497,858	324,458
2020	301,300	255,547
Prior	759,811	639,401
Revolving Loans	159,109	243,175
Total	3,989,396	4,062,756
Pass \| Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2024	33,500	558,787
2023	755,904	975,186
2022	1,091,283	498,744
2021	643,742	314,383
2020	547,393	224,592
Prior	836,844	404,222
Revolving Loans	0	0
Total	3,908,666	2,975,914
Pass \| Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1,599,913	1,867,476
2023	1,450,248	2,323,095
2022	1,593,594	631,500
2021	227,171	87,059
2020	7,741	117,928
Prior	53,000	0
Revolving Loans	818,968	960,024
Total	5,750,635	5,987,082
Pass \| Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2024	953,015	488,120
2023	473,483	358,214
2022	281,867	29,777
2021	44,634	14,794
2020	5,719	2,098
Prior	13,025	0
Revolving Loans	2,874,179	1,707,619
Total	4,645,922	2,600,622
Pass \| Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	44,290	161,831
2023	124,923	256,154
2022	196,464	70,223
2021	49,125	24,906
2020	15,769	19,897
Prior	16,812	9,929
Revolving Loans	0	0
Total	447,383	542,940
Pass \| Other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	21	5,721
2023	0	0
2022	0	1,306
2021	985	0
2020	0	0
Prior	890	1,164
Revolving Loans	0	0
Total	1,896	8,191
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024	31,009	29,423
2023	3,368	69,251
2022	25,244	12,115
2021	1,800	29,593
2020	20,272	21,461
Prior	24,469	33,312
Revolving Loans	33,509	7,214
Total	139,671	202,369
Special Mention \| Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2024	31,000	0
2023	0	7,280
2022	0	7,026
2021	0	8,303
2020	9,015	12,942
Prior	20,706	18,244
Revolving Loans	0	6,614
Total	60,721	60,409
Special Mention \| Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	1,282	9,691
2022	0	4,636
2021	0	1,360
2020	1,131	7,705
Prior	3,738	0
Revolving Loans	0	0
Total	6,151	23,392
Special Mention \| Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	29,000
2023	0	43,427
2022	16,035	0
2021	0	8,457
2020	0	800
Prior	0	15,062
Revolving Loans	0	0
Total	16,035	96,746
Special Mention \| Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	1,763	8,221
2022	8,624	0
2021	1,682	11,413
2020	10,116	0
Prior	0	0
Revolving Loans	33,509	600
Total	55,694	20,234
Special Mention \| Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	9	423
2023	323	632
2022	585	453
2021	118	60
2020	10	14
Prior	25	6
Revolving Loans	0	0
Total	1,070	1,588
Special Mention \| Other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024	143	350
2023	62,990	58,080
2022	133,745	49,633
2021	53,884	71,874
2020	63,514	23,854
Prior	103,413	68,361
Revolving Loans	15,704	0
Total	433,393	272,152
Substandard \| Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	284	5,188
2022	7,323	4,686
2021	0	14,384
2020	14,345	2,024
Prior	50,657	24,386
Revolving Loans	0	0
Total	72,609	50,668
Substandard \| Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	14,057	3,145
2022	7,250	5,686
2021	11,649	38,857
2020	33,953	6,181
Prior	19,330	29,050
Revolving Loans	0	0
Total	86,239	82,919
Substandard \| Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	18,657	29,200
2022	41,422	37,951
2021	40,900	18,500
2020	15,000	15,487
Prior	30,339	14,852
Revolving Loans	0	0
Total	146,318	115,990
Substandard \| Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	29,471	17,762
2022	76,719	1,032
2021	1,032	0
2020	0	0
Prior	2,989	0
Revolving Loans	15,704	0
Total	125,915	18,794
Substandard \| Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	143	350
2023	521	785
2022	1,031	233
2021	303	133
2020	216	162
Prior	98	73
Revolving Loans	0	0
Total	2,312	1,736
Substandard \| Other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	2,000
2022	0	45
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	2,045
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Doubtful \| Other
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans	0	0
Total	$ 0	$ 0

Financing Receivable, Ratio Of Grade Class To Gross Loans

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Financing Receivable, Ratio Of Grade Class To Gross Loans

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Originated, More Than Five Years Before Current Fiscal Year

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Revolving

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Year Five, Originated, Four Years Before Current Fiscal Year

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Year Four, Originated, Three Years Before Current Fiscal Year

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Year One, Originated, Current Fiscal Year

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Year Three, Originated, Two Years Before Current Fiscal Year

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Financing Receivable, Ratio Of Grade Class To Gross Loans, Year Two, Originated, Fiscal Year Before Current Fiscal Year

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- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Topic 326
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-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

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Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

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- Definition

Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn.

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Amount, excluding accrued interest, of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

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Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
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