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LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	$ 1,573,916	$ 1,983,151
Financing receivable, year two	1,932,738	976,561
Financing receivable, year three	901,603	685,228
Financing receivable, year four	567,734	343,695
Financing receivable, year five	299,005	324,120
Financing receivable, prior to year five	904,702	704,248
Revolving	571,105	514,380
Revolving-term	8,934	11,466
Total	6,759,737	5,542,849
Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	6,508	7,287
Level 3 | Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	6,508	7,287
30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	3,292	1,208
60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	1,709	894
90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	7,010	6,717
Commercial loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,449,048	1,805,033
Financing receivable, year two	1,737,223	819,724
Financing receivable, year three	752,187	621,614
Financing receivable, year four	519,320	276,648
Financing receivable, year five	249,856	227,302
Financing receivable, prior to year five	644,225	496,716
Revolving	264,357	223,272
Revolving-term	4,477	6,131
Total	5,620,693	4,476,440
Commercial loans | Non-owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	60,429	68,647
Financing receivable, year two	68,503	50,571
Financing receivable, year three	49,985	169,711
Financing receivable, year four	142,238	130,877
Financing receivable, year five	121,467	100,674
Financing receivable, prior to year five	264,425	183,024
Revolving	3,187	963
Revolving-term	843	892
Total	711,077	705,359
Commercial loans | Non-owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	60,429	68,647
Financing receivable, year two	68,503	50,571
Financing receivable, year three	49,985	169,711
Financing receivable, year four	142,238	130,877
Financing receivable, year five	121,467	100,674
Financing receivable, prior to year five	264,425	183,024
Revolving	3,187	963
Revolving-term	843	892
Total	711,077	705,359
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	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
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	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Multifamily
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,183,994	1,315,204
Financing receivable, year two	1,294,761	561,666
Financing receivable, year three	532,434	286,826
Financing receivable, year four	243,089	60,372
Financing receivable, year five	59,858	26,065
Financing receivable, prior to year five	161,060	165,225
Revolving	501	1
Revolving-term	0	0
Total	3,475,697	2,415,359
Commercial loans | Multifamily | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,183,994	1,315,204
Financing receivable, year two	1,294,761	561,666
Financing receivable, year three	523,758	286,826
Financing receivable, year four	223,254	60,372
Financing receivable, year five	59,858	26,065
Financing receivable, prior to year five	161,060	165,225
Revolving	501	1
Revolving-term	0	0
Total	3,447,186	2,415,359
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	8,676	0
Financing receivable, year four	19,835	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	28,511	0
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	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Multifamily construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	(179)	7,825
Financing receivable, year two	17,954	22,863
Financing receivable, year three	25,601	7,173
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	43,376	37,861
Commercial loans | Multifamily construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	(179)	7,825
Financing receivable, year two	17,954	22,863
Financing receivable, year three	25,601	7,173
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	43,376	37,861
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	7,694
Financing receivable, year two	14,146	3,960
Financing receivable, year three	3,957	0
Financing receivable, year four	0	1,962
Financing receivable, year five	1,887	0
Financing receivable, prior to year five	534	556
Revolving	0	0
Revolving-term	0	0
Total	20,524	14,172
Commercial loans | CRE construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	7,694
Financing receivable, year two	14,146	3,960
Financing receivable, year three	3,957	0
Financing receivable, year four	0	1,962
Financing receivable, year five	1,887	0
Financing receivable, prior to year five	534	556
Revolving	0	0
Revolving-term	0	0
Total	20,524	14,172
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	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
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	89,586	146,595
Financing receivable, year two	108,460	35,640
Financing receivable, year three	22,717	14,509
Financing receivable, year four	12,438	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	76	77
Revolving	113,846	99,206
Revolving-term	0	0
Total	347,123	296,027
Commercial loans | Single family construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	89,586	146,595
Financing receivable, year two	108,460	35,640
Financing receivable, year three	22,717	14,509
Financing receivable, year four	12,438	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	76	77
Revolving	113,846	99,206
Revolving-term	0	0
Total	347,123	296,027
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	21,192	90,311
Financing receivable, year two	107,448	42,636
Financing receivable, year three	19,654	13,362
Financing receivable, year four	9,856	1,775
Financing receivable, year five	723	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	158,873	148,084
Commercial loans | Single family construction to permanent | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	21,192	90,311
Financing receivable, year two	107,448	42,636
Financing receivable, year three	19,654	13,362
Financing receivable, year four	9,856	1,775
Financing receivable, year five	723	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	158,873	148,084
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	41,637	70,902
Financing receivable, year two	70,204	47,536
Financing receivable, year three	46,819	76,088
Financing receivable, year four	74,726	51,023
Financing receivable, year five	45,988	83,212
Financing receivable, prior to year five	189,312	125,248
Revolving	149	798
Revolving-term	1,424	2,899
Total	470,259	457,706
Commercial loans | Owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	41,637	70,902
Financing receivable, year two	70,204	47,536
Financing receivable, year three	46,819	57,423
Financing receivable, year four	74,726	47,716
Financing receivable, year five	42,438	67,042
Financing receivable, prior to year five	175,013	106,659
Revolving	149	798
Revolving-term	1,368	2,839
Total	452,354	400,915
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	0
Financing receivable, year three	0	0
Financing receivable, year four	0	2,196
Financing receivable, year five	2,439	6,019
Financing receivable, prior to year five	11,916	145
Revolving	0	0
Revolving-term	0	60
Total	14,355	8,420
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	18,665
Financing receivable, year four	0	1,111
Financing receivable, year five	1,111	10,151
Financing receivable, prior to year five	2,383	18,444
Revolving	0	0
Revolving-term	56	0
Total	3,550	48,371
Commercial loans | Commercial business
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	52,389	97,855
Financing receivable, year two	55,747	54,852
Financing receivable, year three	51,020	53,945
Financing receivable, year four	36,973	30,639
Financing receivable, year five	19,933	17,351
Financing receivable, prior to year five	28,818	22,586
Revolving	146,674	122,304
Revolving-term	2,210	2,340
Total	393,764	401,872
Commercial loans | Commercial business | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	52,389	88,139
Financing receivable, year two	48,098	51,453
Financing receivable, year three	48,079	44,882
Financing receivable, year four	34,689	24,711
Financing receivable, year five	17,952	11,859
Financing receivable, prior to year five	23,204	21,258
Revolving	141,298	112,759
Revolving-term	1,999	2,104
Total	367,708	357,165
Commercial loans | Commercial business | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	201	0
Financing receivable, year three	26	7,396
Financing receivable, year four	0	0
Financing receivable, year five	194	4,396
Financing receivable, prior to year five	3,523	0
Revolving	756	5,613
Revolving-term	201	134
Total	4,901	17,539
Commercial loans | Commercial business | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	9,716
Financing receivable, year two	7,448	3,399
Financing receivable, year three	2,915	1,667
Financing receivable, year four	2,284	5,928
Financing receivable, year five	1,787	1,096
Financing receivable, prior to year five	2,091	1,328
Revolving	4,620	3,932
Revolving-term	10	102
Total	21,155	27,168
Consumer loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	124,868	178,118
Financing receivable, year two	195,515	156,837
Financing receivable, year three	149,416	63,614
Financing receivable, year four	48,414	67,047
Financing receivable, year five	49,149	96,818
Financing receivable, prior to year five	260,477	207,532
Revolving	306,748	291,108
Revolving-term	4,457	5,335
Total	1,139,044	1,066,409
Consumer loans | Single family
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	123,677	176,110
Financing receivable, year two	194,198	156,360
Financing receivable, year three	149,161	63,221
Financing receivable, year four	48,176	66,515
Financing receivable, year five	48,974	96,302
Financing receivable, prior to year five	258,203	204,823
Revolving	0	0
Revolving-term	0	0
Total	822,389	763,331
Consumer loans | Single family | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	123,677	176,110
Financing receivable, year two	194,198	156,360
Financing receivable, year three	149,161	62,369
Financing receivable, year four	47,744	66,063
Financing receivable, year five	48,522	95,988
Financing receivable, prior to year five	256,738	204,229
Revolving	0	0
Revolving-term	0	0
Total	820,040	761,119
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	291
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	462	0
Revolving	0	0
Revolving-term	0	0
Total	462	291
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	314
Financing receivable, prior to year five	173	471
Revolving	0	0
Revolving-term	0	0
Total	173	785
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	561
Financing receivable, year four	432	452
Financing receivable, year five	452	0
Financing receivable, prior to year five	830	123
Revolving	0	0
Revolving-term	0	0
Total	1,714	1,136
Consumer loans | Home equity and other
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,191	2,008
Financing receivable, year two	1,317	477
Financing receivable, year three	255	393
Financing receivable, year four	238	532
Financing receivable, year five	175	516
Financing receivable, prior to year five	2,274	2,709
Revolving	306,748	291,108
Revolving-term	4,457	5,335
Total	316,655	303,078
Consumer loans | Home equity and other | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,188	2,005
Financing receivable, year two	1,307	474
Financing receivable, year three	242	393
Financing receivable, year four	238	532
Financing receivable, year five	175	516
Financing receivable, prior to year five	2,085	2,609
Revolving	306,225	290,512
Revolving-term	4,457	5,273
Total	315,917	302,314
Consumer loans | Home equity and other | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	3	0
Financing receivable, year two	3	3
Financing receivable, year three	13	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	94
Revolving	191	40
Revolving-term	0	0
Total	210	137
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	3	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	94	0
Revolving	99	12
Revolving-term	0	62
Total	196	74
Consumer loans | Home equity and other | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	3
Financing receivable, year two	4	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	95	6
Revolving	233	544
Revolving-term	0	0
Total	$ 332	$ 553

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

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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-Publisher FASB
-Name Accounting Standards Codification
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Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn.

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