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LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	$ 110,273	$ 273,487
Financing receivable, year two	269,402	2,520,561
Financing receivable, year three	2,482,584	1,781,268
Financing receivable, year four	1,755,439	767,209
Financing receivable, year five	752,838	465,962
Financing receivable, prior to year five	1,318,615	924,665
Revolving	684,733	681,941
Revolving-term	6,166	7,811
Total	7,380,050	7,422,904
Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	1,286	1,280
Level 3 | Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	1,286	1,280
30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	3,824	6,148
60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	2,691	4,133
90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	5,459	4,261
Commercial loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	108,650	244,302
Financing receivable, year two	228,508	2,163,372
Financing receivable, year three	2,102,525	1,467,091
Financing receivable, year four	1,440,584	619,905
Financing receivable, year five	611,241	416,790
Financing receivable, prior to year five	1,039,090	674,608
Revolving	295,917	310,096
Revolving-term	1,188	2,160
Total	5,827,703	5,898,324
Commercial loans | Non-owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	1,499
Financing receivable, year two	1,471	70,388
Financing receivable, year three	70,220	71,217
Financing receivable, year four	71,824	41,235
Financing receivable, year five	40,563	135,816
Financing receivable, prior to year five	428,252	320,556
Revolving	607	1,174
Revolving-term	0	0
Total	612,937	641,885
Commercial loans | Non-owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	1,499
Financing receivable, year two	1,471	70,388
Financing receivable, year three	70,220	71,217
Financing receivable, year four	71,824	41,235
Financing receivable, year five	40,563	118,900
Financing receivable, prior to year five	382,326	286,379
Revolving	607	601
Revolving-term	0	0
Total	567,011	590,219
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	686
Financing receivable, prior to year five	29,508	34,177
Revolving	0	0
Revolving-term	0	0
Total	29,508	34,863
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	16,230
Financing receivable, prior to year five	16,418	0
Revolving	0	573
Revolving-term	0	0
Total	16,418	16,803
Commercial loans | Multifamily
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,736	108,274
Financing receivable, year two	106,487	1,813,647
Financing receivable, year three	1,807,719	1,155,619
Financing receivable, year four	1,168,918	488,595
Financing receivable, year five	484,035	191,935
Financing receivable, prior to year five	366,263	182,119
Revolving	0	0
Revolving-term	0	0
Total	3,935,158	3,940,189
Commercial loans | Multifamily | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,736	108,274
Financing receivable, year two	106,487	1,813,647
Financing receivable, year three	1,733,374	1,151,677
Financing receivable, year four	1,164,983	475,708
Financing receivable, year five	459,782	189,567
Financing receivable, prior to year five	348,952	177,712
Revolving	0	0
Revolving-term	0	0
Total	3,815,314	3,916,585
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	74,345	3,942
Financing receivable, year four	3,935	12,887
Financing receivable, year five	24,253	2,368
Financing receivable, prior to year five	11,046	1,344
Revolving	0	0
Revolving-term	0	0
Total	113,579	20,541
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	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	6,265	3,063
Revolving	0	0
Revolving-term	0	0
Total	6,265	3,063
Commercial loans | Multifamily construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	(198)
Financing receivable, year two	20,284	56,013
Financing receivable, year three	61,854	112,234
Financing receivable, year four	109,041	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	191,179	168,049
Commercial loans | Multifamily construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	(198)
Financing receivable, year two	20,284	56,013
Financing receivable, year three	61,854	112,234
Financing receivable, year four	109,041	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	191,179	168,049
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	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 | 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 | CRE construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	7
Financing receivable, year two	2,790	0
Financing receivable, year three	0	14,685
Financing receivable, year four	0	3,821
Financing receivable, year five	3,821	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	6,611	18,513
Commercial loans | CRE construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	7
Financing receivable, year two	2,790	0
Financing receivable, year three	0	14,685
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	2,790	14,692
Commercial loans | CRE 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 | CRE 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	3,821
Financing receivable, year five	3,821	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	3,821	3,821
Commercial loans | Single family construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	63,668	75,305
Financing receivable, year two	45,726	39,621
Financing receivable, year three	15,814	12,294
Financing receivable, year four	11,119	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	70	72
Revolving	132,224	146,758
Revolving-term	0	0
Total	268,621	274,050
Commercial loans | Single family construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	63,668	75,305
Financing receivable, year two	45,726	39,621
Financing receivable, year three	15,814	12,294
Financing receivable, year four	11,119	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	70	72
Revolving	132,224	146,758
Revolving-term	0	0
Total	268,621	274,050
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	2,784	27,114
Financing receivable, year two	22,405	56,469
Financing receivable, year three	28,862	19,871
Financing receivable, year four	8,393	1,850
Financing receivable, year five	1,590	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	64,034	105,304
Commercial loans | Single family construction to permanent | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	2,784	27,114
Financing receivable, year two	22,405	56,469
Financing receivable, year three	28,862	19,871
Financing receivable, year four	8,393	1,850
Financing receivable, year five	1,590	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	64,034	105,304
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	1,438	14,331
Financing receivable, year two	12,661	69,877
Financing receivable, year three	67,116	48,919
Financing receivable, year four	45,078	43,399
Financing receivable, year five	42,677	68,601
Financing receivable, prior to year five	203,340	145,034
Revolving	5	2
Revolving-term	137	1,122
Total	372,452	391,285
Commercial loans | Owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,438	12,459
Financing receivable, year two	10,830	68,399
Financing receivable, year three	60,914	39,629
Financing receivable, year four	37,059	43,399
Financing receivable, year five	42,677	65,392
Financing receivable, prior to year five	172,188	111,199
Revolving	5	2
Revolving-term	137	1,122
Total	325,248	341,601
Commercial loans | Owner occupied CRE | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	1,871
Financing receivable, year two	1,831	1,478
Financing receivable, year three	6,202	9,290
Financing receivable, year four	8,019	0
Financing receivable, year five	0	2,956
Financing receivable, prior to year five	28,029	28,784
Revolving	0	0
Revolving-term	0	0
Total	44,081	44,379
Commercial loans | Owner occupied CRE | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	1
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	253
Financing receivable, prior to year five	3,123	5,051
Revolving	0	0
Revolving-term	0	0
Total	3,123	5,305
Commercial loans | Commercial business
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	39,024	17,970
Financing receivable, year two	16,684	57,357
Financing receivable, year three	50,940	32,252
Financing receivable, year four	26,211	41,005
Financing receivable, year five	38,555	20,438
Financing receivable, prior to year five	41,165	26,827
Revolving	163,081	162,162
Revolving-term	1,051	1,038
Total	376,711	359,049
Commercial loans | Commercial business | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	39,024	17,970
Financing receivable, year two	16,245	45,892
Financing receivable, year three	39,856	27,227
Financing receivable, year four	22,461	33,404
Financing receivable, year five	31,225	16,198
Financing receivable, prior to year five	36,168	24,903
Revolving	158,855	157,656
Revolving-term	1,006	973
Total	344,840	324,223
Commercial loans | Commercial business | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	11,465
Financing receivable, year three	10,815	2,891
Financing receivable, year four	3,251	0
Financing receivable, year five	0	452
Financing receivable, prior to year five	302	38
Revolving	2,731	3,485
Revolving-term	0	0
Total	17,099	18,331
Commercial loans | Commercial business | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	439	0
Financing receivable, year three	269	2,134
Financing receivable, year four	499	7,601
Financing receivable, year five	7,330	3,788
Financing receivable, prior to year five	4,695	1,886
Revolving	1,495	1,021
Revolving-term	45	65
Total	14,772	16,495
Consumer loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,623	29,185
Financing receivable, year two	40,894	357,189
Financing receivable, year three	380,059	314,177
Financing receivable, year four	314,855	147,304
Financing receivable, year five	141,597	49,172
Financing receivable, prior to year five	279,525	250,057
Revolving	388,816	371,845
Revolving-term	4,978	5,651
Total	1,552,347	1,524,580
Consumer loans | Single family
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	516	27,011
Financing receivable, year two	39,381	354,691
Financing receivable, year three	377,987	313,866
Financing receivable, year four	314,657	147,183
Financing receivable, year five	141,490	49,126
Financing receivable, prior to year five	277,973	248,402
Revolving	0	0
Revolving-term	0	0
Total	1,152,004	1,140,279
Consumer loans | Single family | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	516	27,011
Financing receivable, year two	39,381	354,691
Financing receivable, year three	377,987	313,866
Financing receivable, year four	314,657	147,183
Financing receivable, year five	141,490	49,126
Financing receivable, prior to year five	276,411	245,574
Revolving	0	0
Revolving-term	0	0
Total	1,150,442	1,137,451
Consumer loans | Single family | 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	1,030	781
Revolving	0	0
Revolving-term	0	0
Total	1,030	781
Consumer loans | Single family | 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	1,374
Revolving	0	0
Revolving-term	0	0
Total	0	1,374
Consumer loans | Single family | 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	532	673
Revolving	0	0
Revolving-term	0	0
Total	532	673
Consumer loans | Home equity and other
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,107	2,174
Financing receivable, year two	1,513	2,498
Financing receivable, year three	2,072	311
Financing receivable, year four	198	121
Financing receivable, year five	107	46
Financing receivable, prior to year five	1,552	1,655
Revolving	388,816	371,845
Revolving-term	4,978	5,651
Total	400,343	384,301
Consumer loans | Home equity and other | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,107	2,165
Financing receivable, year two	1,502	2,493
Financing receivable, year three	2,064	311
Financing receivable, year four	197	121
Financing receivable, year five	107	46
Financing receivable, prior to year five	1,528	1,631
Revolving	386,895	370,462
Revolving-term	4,761	5,483
Total	398,161	382,712
Consumer loans | Home equity and other | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	8
Financing receivable, year two	2	2
Financing receivable, year three	5	0
Financing receivable, year four	1	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	531	802
Revolving-term	151	162
Total	690	974
Consumer loans | Home equity and other | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	1
Financing receivable, year two	9	3
Financing receivable, year three	2	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	681	419
Revolving-term	5	0
Total	697	423
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	0	0
Financing receivable, year three	1	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	24	24
Revolving	709	162
Revolving-term	61	6
Total	$ 795	$ 192

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No definition available.

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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
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-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
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
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+ 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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-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: 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

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