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LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	$ 68,477	$ 163,704
Financing receivable, year two	126,888	238,834
Financing receivable, year three	212,591	2,275,837
Financing receivable, year four	2,203,796	1,102,301
Financing receivable, year five	1,080,046	591,778
Financing receivable, prior to year five	1,499,031	1,161,583
Revolving	736,839	692,476
Revolving-term	5,471	5,283
Total	5,933,139	6,231,796
Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	959	1,287
Level 3 | Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	959	1,287
30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	4,600	4,945
60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	2,114	1,727
90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	3,737	4,354
Commercial loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	66,939	161,507
Financing receivable, year two	125,936	206,951
Financing receivable, year three	181,888	1,895,239
Financing receivable, year four	1,830,609	798,255
Financing receivable, year five	783,395	452,534
Financing receivable, prior to year five	1,135,891	904,196
Revolving	314,297	290,718
Revolving-term	797	766
Total	4,439,752	4,710,166
Commercial loans | Non-owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	3,958	0
Financing receivable, year two	0	1,441
Financing receivable, year three	1,411	70,128
Financing receivable, year four	69,104	71,493
Financing receivable, year five	70,716	39,885
Financing receivable, prior to year five	363,622	387,839
Revolving	(30)	(36)
Revolving-term	0	0
Total	508,781	570,750
Commercial loans | Non-owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	3,958	0
Financing receivable, year two	0	1,441
Financing receivable, year three	1,411	70,128
Financing receivable, year four	69,104	71,493
Financing receivable, year five	70,716	39,885
Financing receivable, prior to year five	325,125	347,058
Revolving	(30)	(36)
Revolving-term	0	0
Total	470,284	529,969
Commercial loans | Non-owner occupied CRE | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	22,483	24,551
Revolving	0	0
Revolving-term	0	0
Total	22,483	24,551
Commercial loans | Non-owner occupied CRE | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	16,014	16,230
Revolving	0	0
Revolving-term	0	0
Total	16,014	16,230
Commercial loans | Multifamily
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	6,748	1,650
Financing receivable, year two	0	106,415
Financing receivable, year three	106,340	1,620,674
Financing receivable, year four	1,632,389	647,833
Financing receivable, year five	644,424	330,418
Financing receivable, prior to year five	505,441	285,685
Revolving	0	0
Revolving-term	0	0
Total	2,895,342	2,992,675
Commercial loans | Multifamily | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	6,748	1,650
Financing receivable, year two	0	106,415
Financing receivable, year three	76,265	1,538,855
Financing receivable, year four	1,506,962	643,044
Financing receivable, year five	614,383	257,110
Financing receivable, prior to year five	417,712	255,643
Revolving	0	0
Revolving-term	0	0
Total	2,622,070	2,802,717
Commercial loans | Multifamily | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	15,571	66,217
Financing receivable, year four	50,387	4,789
Financing receivable, year five	28,052	73,308
Financing receivable, prior to year five	61,785	23,835
Revolving	0	0
Revolving-term	0	0
Total	155,795	168,149
Commercial loans | Multifamily | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	14,504	15,602
Financing receivable, year four	75,040	0
Financing receivable, year five	1,989	0
Financing receivable, prior to year five	25,944	6,207
Revolving	0	0
Revolving-term	0	0
Total	117,477	21,809
Commercial loans | Multifamily construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	31,349
Financing receivable, year three	34,709	67,557
Financing receivable, year four	10,460	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	45,169	98,906
Commercial loans | Multifamily construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	31,349
Financing receivable, year three	34,709	67,557
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	34,709	98,906
Commercial loans | Multifamily construction | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	10,460	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	10,460	0
Commercial loans | Multifamily construction | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Construction/land development
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	19
Financing receivable, year two	737	7,198
Financing receivable, year three	7,465	0
Financing receivable, year four	0	0
Financing receivable, year five	0	3,821
Financing receivable, prior to year five	3,771	0
Revolving	0	0
Revolving-term	0	0
Total	11,973	11,038
Commercial loans | Construction/land development | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	19
Financing receivable, year two	737	7,198
Financing receivable, year three	7,465	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	8,202	7,217
Commercial loans | Construction/land development | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Construction/land development | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	3,821
Financing receivable, prior to year five	3,771	0
Revolving	0	0
Revolving-term	0	0
Total	3,771	3,821
Commercial loans | Single family construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	52,198	121,305
Financing receivable, year two	86,539	22,412
Financing receivable, year three	4,487	5,346
Financing receivable, year four	253	7,252
Financing receivable, year five	1,489	0
Financing receivable, prior to year five	67	69
Revolving	189,625	164,442
Revolving-term	0	0
Total	334,658	320,826
Commercial loans | Single family construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	52,198	121,305
Financing receivable, year two	86,539	22,412
Financing receivable, year three	4,487	5,346
Financing receivable, year four	253	7,252
Financing receivable, year five	1,489	0
Financing receivable, prior to year five	67	69
Revolving	189,625	164,442
Revolving-term	0	0
Total	334,658	320,826
Commercial loans | Single family construction | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,805	6,153
Financing receivable, year two	8,318	9,719
Financing receivable, year three	3,835	17,598
Financing receivable, year four	12,694	7,977
Financing receivable, year five	6,667	523
Financing receivable, prior to year five	599	0
Revolving	0	0
Revolving-term	0	0
Total	33,918	41,970
Commercial loans | Single family construction to permanent | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,805	6,153
Financing receivable, year two	8,318	9,719
Financing receivable, year three	3,835	17,598
Financing receivable, year four	12,694	7,977
Financing receivable, year five	6,667	523
Financing receivable, prior to year five	599	0
Revolving	0	0
Revolving-term	0	0
Total	33,918	41,970
Commercial loans | Single family construction to permanent | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,746	5,431
Financing receivable, year two	3,938	12,290
Financing receivable, year three	8,882	64,883
Financing receivable, year four	63,108	40,973
Financing receivable, year five	39,773	41,850
Financing receivable, prior to year five	206,852	196,524
Revolving	0	3
Revolving-term	0	43
Total	324,299	361,997
Commercial loans | Owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,746	5,431
Financing receivable, year two	3,938	10,501
Financing receivable, year three	8,882	58,423
Financing receivable, year four	56,735	33,371
Financing receivable, year five	33,754	41,533
Financing receivable, prior to year five	177,364	168,082
Revolving	0	3
Revolving-term	0	43
Total	282,419	317,387
Commercial loans | Owner occupied CRE | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	1,789
Financing receivable, year three	0	6,129
Financing receivable, year four	6,053	7,602
Financing receivable, year five	4,442	317
Financing receivable, prior to year five	28,230	26,203
Revolving	0	0
Revolving-term	0	0
Total	38,725	42,040
Commercial loans | Owner occupied CRE | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	331
Financing receivable, year four	320	0
Financing receivable, year five	1,577	0
Financing receivable, prior to year five	1,258	2,239
Revolving	0	0
Revolving-term	0	0
Total	3,155	2,570
Commercial loans | Commercial business
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	484	26,949
Financing receivable, year two	26,404	16,127
Financing receivable, year three	14,759	49,053
Financing receivable, year four	42,601	22,727
Financing receivable, year five	20,326	36,037
Financing receivable, prior to year five	55,539	34,079
Revolving	124,702	126,309
Revolving-term	797	723
Total	285,612	312,004
Commercial loans | Commercial business | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	484	26,706
Financing receivable, year two	25,311	15,721
Financing receivable, year three	14,305	36,209
Financing receivable, year four	18,507	20,347
Financing receivable, year five	18,593	28,207
Financing receivable, prior to year five	41,806	28,836
Revolving	120,928	123,003
Revolving-term	797	700
Total	240,731	279,729
Commercial loans | Commercial business | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	364	0
Financing receivable, year three	93	959
Financing receivable, year four	1,035	2,380
Financing receivable, year five	1,733	638
Financing receivable, prior to year five	2,359	615
Revolving	996	386
Revolving-term	0	0
Total	6,580	4,978
Commercial loans | Commercial business | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	243
Financing receivable, year two	729	406
Financing receivable, year three	361	11,885
Financing receivable, year four	23,059	0
Financing receivable, year five	0	7,192
Financing receivable, prior to year five	11,374	4,628
Revolving	2,778	2,920
Revolving-term	0	23
Total	38,301	27,297
Consumer loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		2,197
Financing receivable, year one, net	1,538
Financing receivable, year two	952	31,883
Financing receivable, year three	30,703	380,598
Financing receivable, year four	373,187	304,046
Financing receivable, year five	296,651	139,244
Financing receivable, prior to year five	363,140	257,387
Revolving	422,542	401,758
Revolving-term	4,674	4,517
Total	1,493,387	1,521,630
Consumer loans | Single family
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		566
Financing receivable, year one, net	571
Financing receivable, year two	91	30,940
Financing receivable, year three	29,967	379,065
Financing receivable, year four	372,054	303,920
Financing receivable, year five	296,567	139,159
Financing receivable, prior to year five	361,316	255,445
Revolving	0	0
Revolving-term	0	0
Total	1,060,566	1,109,095
Consumer loans | Single family | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		566
Financing receivable, year one, net	571
Financing receivable, year two	91	30,940
Financing receivable, year three	29,553	378,613
Financing receivable, year four	370,811	303,920
Financing receivable, year five	296,464	139,159
Financing receivable, prior to year five	357,673	251,322
Revolving	0	0
Revolving-term	0	0
Total	1,055,163	1,104,520
Consumer loans | Single family | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	414	452
Financing receivable, year four	791	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	1,266	1,673
Revolving	0	0
Revolving-term	0	0
Total	2,471	2,125
Consumer loans | Single family | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	440
Revolving	0	0
Revolving-term	0	0
Total	0	440
Consumer loans | Single family | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	452	0
Financing receivable, year five	103	0
Financing receivable, prior to year five	2,377	2,010
Revolving	0	0
Revolving-term	0	0
Total	2,932	2,010
Consumer loans | Home equity and other
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	967	1,631
Financing receivable, year two	861	943
Financing receivable, year three	736	1,533
Financing receivable, year four	1,133	126
Financing receivable, year five	84	85
Financing receivable, prior to year five	1,824	1,942
Revolving	422,542	401,758
Revolving-term	4,674	4,517
Total	432,821	412,535
Consumer loans | Home equity and other | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	967	1,606
Financing receivable, year two	851	936
Financing receivable, year three	735	1,528
Financing receivable, year four	1,133	126
Financing receivable, year five	84	85
Financing receivable, prior to year five	1,781	1,932
Revolving	420,778	399,531
Revolving-term	4,614	4,449
Total	430,943	410,193
Consumer loans | Home equity and other | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	25
Financing receivable, year two	3	4
Financing receivable, year three	1	1
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	38	0
Revolving	418	474
Revolving-term	60	62
Total	520	566
Consumer loans | Home equity and other | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	5	3
Financing receivable, year three	0	4
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	305	626
Revolving-term	0	0
Total	310	633
Consumer loans | Home equity and other | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	2	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	5	10
Revolving	1,041	1,127
Revolving-term	0	6
Total	$ 1,048	$ 1,143

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Financing Receivable, Excluding Accrued Interest, Revolving, Net

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Financing Receivable, Excluding Accrued Interest, Revolving, Term

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Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Net

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
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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
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