LOANS & ALLOWANCE FOR CREDIT LOSSES - SCHEDULE OF LOANS BY AMORTIZED COST BASIS BY YEAR OF ORIGINATION AND CREDIT QUALITY INDICATOR (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2025	Jun. 30, 2025
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	$ 1,546,496	$ 5,412,403
2025 - 2024	5,578,123	2,547,925
2024 - 2023	2,812,160	2,175,575
2023 - 2022	2,211,952	2,911,537
2022 - 2021	2,687,112	1,098,514
Prior	2,696,961	1,782,450
Revolving Loans	5,609,444	5,623,293
Total	23,142,248	21,551,697
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	589
Gross charge-offs 2025 - 2024	474	1,528
Gross charge-offs 2024 - 2023	153	3,332
Gross charge-offs 2023 - 2022	450	3,910
Gross charge-offs 2022 - 2021	701	6,739
Prior	4,580	12,208
Revolving Loans	0	2,000
Total	$ 6,358	$ 30,306
As a % of total gross loans
2026 - 2025	6.70%	25.10%
2025 - 2024	24.10%	11.80%
2024 - 2023	12.20%	10.10%
2023 - 2022	9.60%	13.50%
2022 - 2021	11.60%	5.10%
Prior	11.70%	8.30%
Revolving Loans	24.20%	26.10%
Total	100.00%	100.00%
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	$ 1,546,159	$ 5,406,078
2025 - 2024	5,547,463	2,490,906
2024 - 2023	2,672,892	2,148,488
2023 - 2022	2,171,871	2,731,588
2022 - 2021	2,481,364	1,071,097
Prior	2,587,145	1,645,380
Revolving Loans	5,573,555	5,489,416
Total	22,580,449	20,982,953
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	256	2,424
2025 - 2024	13,896	46,252
2024 - 2023	60,212	8,948
2023 - 2022	7,758	3,410
2022 - 2021	12,389	12,662
Prior	20,758	44,886
Revolving Loans	0	19,990
Total	115,269	138,572
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	81	3,901
2025 - 2024	16,165	10,767
2024 - 2023	79,052	18,139
2023 - 2022	32,320	166,539
2022 - 2021	183,359	14,755
Prior	89,052	92,184
Revolving Loans	35,889	113,887
Total	435,918	420,172
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	599	0
2024 - 2023	4	0
2023 - 2022	3	10,000
2022 - 2021	10,000	0
Prior	6	0
Revolving Loans	0	0
Total	10,612	10,000
Single Family - Mortgage & Warehouse
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	197,266	752,486
2025 - 2024	652,424	270,245
2024 - 2023	235,052	456,692
2023 - 2022	431,261	1,077,539
2022 - 2021	1,055,748	446,326
Prior	1,181,261	782,617
Revolving Loans	787,877	609,373
Total	4,540,889	4,395,278
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	0
Gross charge-offs 2025 - 2024	0	340
Gross charge-offs 2024 - 2023	0	0
Gross charge-offs 2023 - 2022	0	400
Gross charge-offs 2022 - 2021	48	0
Prior	347	2,296
Revolving Loans	0	0
Total	395	3,036
Single Family - Mortgage & Warehouse \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	197,266	750,357
2025 - 2024	652,424	269,165
2024 - 2023	233,972	451,330
2023 - 2022	426,758	1,067,144
2022 - 2021	1,033,680	434,352
Prior	1,108,076	715,620
Revolving Loans	787,877	599,406
Total	4,440,053	4,287,374
Single Family - Mortgage & Warehouse \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	2,129
2025 - 2024	0	1,080
2024 - 2023	1,080	5,362
2023 - 2022	0	3,140
2022 - 2021	10,689	5,254
Prior	19,087	26,604
Revolving Loans	0	9,967
Total	30,856	53,536
Single Family - Mortgage & Warehouse \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	4,503	7,255
2022 - 2021	11,379	6,720
Prior	54,098	40,393
Revolving Loans	0	0
Total	69,980	54,368
Single Family - Mortgage & Warehouse \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	0	0
2022 - 2021	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Multifamily and Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	28,237	75,755
2025 - 2024	75,585	22,435
2024 - 2023	21,577	644,050
2023 - 2022	643,486	872,388
2022 - 2021	818,455	429,938
Prior	1,206,422	894,723
Revolving Loans	0	1,450
Total	2,793,762	2,940,739
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	0
Gross charge-offs 2025 - 2024	0	375
Gross charge-offs 2024 - 2023	0	86
Gross charge-offs 2023 - 2022	0	5
Gross charge-offs 2022 - 2021	0	0
Prior	3,918	8,099
Revolving Loans	0	0
Total	3,918	8,565
Multifamily and Commercial Mortgage \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	28,237	75,755
2025 - 2024	75,585	22,435
2024 - 2023	21,577	632,120
2023 - 2022	631,556	859,189
2022 - 2021	801,448	422,683
Prior	1,191,542	842,787
Revolving Loans		1,450
Total	2,749,945	2,856,419
Multifamily and Commercial Mortgage \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	3,400
2023 - 2022	3,400	0
2022 - 2021	0	7,255
Prior	1,547	18,272
Revolving Loans	0	0
Total	4,947	28,927
Multifamily and Commercial Mortgage \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	8,530
2023 - 2022	8,530	13,199
2022 - 2021	17,007	0
Prior	13,333	33,664
Revolving Loans	0	0
Total	38,870	55,393
Multifamily and Commercial Mortgage \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	0	0
2022 - 2021	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	512,926	3,135,530
2025 - 2024	3,112,458	1,342,372
2024 - 2023	1,372,529	679,875
2023 - 2022	696,274	585,142
2022 - 2021	409,209	157,581
Prior	196,219	61,937
Revolving Loans	995,957	974,750
Total	7,295,572	6,937,187
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	0
Gross charge-offs 2025 - 2024	0	0
Gross charge-offs 2024 - 2023	0	0
Gross charge-offs 2023 - 2022	0	165
Gross charge-offs 2022 - 2021	4	0
Prior	0	0
Revolving Loans	0	0
Total	4	165
Commercial Real Estate \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	512,926	3,135,530
2025 - 2024	3,112,458	1,342,372
2024 - 2023	1,372,529	679,875
2023 - 2022	689,214	575,642
2022 - 2021	409,209	152,581
Prior	181,498	47,214
Revolving Loans	981,352	960,145
Total	7,259,186	6,893,359
Commercial Real Estate \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	0	0
2022 - 2021	0	0
Prior	0	0
Revolving Loans
Total	0	0
Commercial Real Estate \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	7,060	9,500
2022 - 2021	0	5,000
Prior	14,721	14,723
Revolving Loans	14,605	14,605
Total	36,386	43,828
Commercial Real Estate \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	0	0
2022 - 2021	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Commercial & Industrial - Non-RE
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	710,985	1,234,865
2025 - 2024	1,535,297	865,186
2024 - 2023	1,138,591	319,287
2023 - 2022	379,756	266,163
2022 - 2021	307,865	40,976
Prior	82,877	31,300
Revolving Loans	3,825,610	4,037,720
Total	7,980,981	6,795,497
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	0
Gross charge-offs 2025 - 2024	0	0
Gross charge-offs 2024 - 2023	0	883
Gross charge-offs 2023 - 2022	0	0
Gross charge-offs 2022 - 2021	0	5,942
Prior	255	0
Revolving Loans	0	2,000
Total	255	8,825
Commercial & Industrial - Non-RE \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	710,648	1,231,118
2025 - 2024	1,505,243	809,347
2024 - 2023	1,000,419	310,043
2023 - 2022	363,791	120,385
2022 - 2021	142,039	38,397
Prior	76,615	28,311
Revolving Loans	3,804,326	3,928,415
Total	7,603,081	6,466,016
Commercial & Industrial - Non-RE \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	256	0
2025 - 2024	13,606	45,120
2024 - 2023	59,132	0
2023 - 2022	4,026	0
2022 - 2021	1,537	93
Prior	71	0
Revolving Loans	0	10,023
Total	78,628	55,236
Commercial & Industrial - Non-RE \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	81	3,747
2025 - 2024	15,849	10,719
2024 - 2023	79,036	9,244
2023 - 2022	11,936	135,778
2022 - 2021	154,289	2,486
Prior	6,185	2,989
Revolving Loans	21,284	99,282
Total	288,660	264,245
Commercial & Industrial - Non-RE \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	599	0
2024 - 2023	4	0
2023 - 2022	3	10,000
2022 - 2021	10,000	0
Prior	6	0
Revolving Loans	0	0
Total	10,612	10,000
Auto & Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	97,082	213,767
2025 - 2024	202,359	47,687
2024 - 2023	44,411	75,671
2023 - 2022	61,175	110,305
2022 - 2021	95,835	23,693
Prior	30,182	11,873
Revolving Loans	0	0
Total	531,044	482,996
Year-to-date gross charge-offs
Gross charge-offs 2026 - 2025	0	589
Gross charge-offs 2025 - 2024	474	813
Gross charge-offs 2024 - 2023	153	2,363
Gross charge-offs 2023 - 2022	450	3,340
Gross charge-offs 2022 - 2021	649	797
Prior	60	1,813
Revolving Loans	0	0
Total	1,786	9,715
Auto & Consumer \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	97,082	213,318
2025 - 2024	201,753	47,587
2024 - 2023	44,395	75,120
2023 - 2022	60,552	109,228
2022 - 2021	94,988	23,084
Prior	29,414	11,448
Revolving Loans	0	0
Total	528,184	479,785
Auto & Consumer \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	295
2025 - 2024	290	52
2024 - 2023	0	186
2023 - 2022	332	270
2022 - 2021	163	60
Prior	53	10
Revolving Loans	0	0
Total	838	873
Auto & Consumer \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	154
2025 - 2024	316	48
2024 - 2023	16	365
2023 - 2022	291	807
2022 - 2021	684	549
Prior	715	415
Revolving Loans	0	0
Total	2,022	2,338
Auto & Consumer \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2026 - 2025	0	0
2025 - 2024	0	0
2024 - 2023	0	0
2023 - 2022	0	0
2022 - 2021	0	0
Prior	0	0
Revolving Loans	0	0
Total	$ 0	$ 0

Axos Financial, Inc. 10-Q