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LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | $ 58,735 | $ 273,487
Financing receivable, year two | 283,551 | 2,520,561
Financing receivable, year three | 2,503,834 | 1,781,268
Financing receivable, year four | 1,773,306 | 767,209
Financing receivable, year five | 761,780 | 465,962
Financing receivable, prior to year five | 1,359,987 | 924,665
Revolving | 696,949 | 681,941
Revolving-term | 6,587 | 7,811
Total | 7,444,729 | 7,422,904
Recurring |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Single family LHFI | 1,285 | 1,280
Level 3 | Recurring |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Single family LHFI | 1,285 | 1,280
30-59 days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 5,349 | 6,148
60-89 days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 2,630 | 4,133
90+ days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 3,794 | 4,261
Commercial loans |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 57,629 | 244,302
Financing receivable, year two | 250,390 | 2,163,372
Financing receivable, year three | 2,130,782 | 1,467,091
Financing receivable, year four | 1,458,645 | 619,905
Financing receivable, year five | 615,558 | 416,790
Financing receivable, prior to year five | 1,071,677 | 674,608
Revolving | 321,792 | 310,096
Revolving-term | 1,166 | 2,160
Total | 5,907,639 | 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 | 1,485 | 70,388
Financing receivable, year three | 70,344 | 71,217
Financing receivable, year four | 71,952 | 41,235
Financing receivable, year five | 40,897 | 135,816
Financing receivable, prior to year five | 447,558 | 320,556
Revolving | 1,165 | 1,174
Revolving-term | 0 | 0
Total | 633,401 | 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 | 1,485 | 70,388
Financing receivable, year three | 70,344 | 71,217
Financing receivable, year four | 71,952 | 41,235
Financing receivable, year five | 40,897 | 118,900
Financing receivable, prior to year five | 396,782 | 286,379
Revolving | 605 | 601
Revolving-term | 0 | 0
Total | 582,065 | 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 | 34,341 | 34,177
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 34,341 | 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 | 16,435 | 0
Revolving | 560 | 573
Revolving-term | 0 | 0
Total | 16,995 | 16,803
Commercial loans | Multifamily |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,749 | 108,274
Financing receivable, year two | 106,521 | 1,813,647
Financing receivable, year three | 1,810,939 | 1,155,619
Financing receivable, year four | 1,153,636 | 488,595
Financing receivable, year five | 486,327 | 191,935
Financing receivable, prior to year five | 370,507 | 182,119
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,929,679 | 3,940,189
Commercial loans | Multifamily | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,749 | 108,274
Financing receivable, year two | 106,521 | 1,813,647
Financing receivable, year three | 1,810,939 | 1,151,677
Financing receivable, year four | 1,149,694 | 475,708
Financing receivable, year five | 473,507 | 189,567
Financing receivable, prior to year five | 355,554 | 177,712
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,897,964 | 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 | 0 | 3,942
Financing receivable, year four | 3,942 | 12,887
Financing receivable, year five | 12,820 | 2,368
Financing receivable, prior to year five | 8,660 | 1,344
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 25,422 | 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 | 6,293 | 3,063
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 6,293 | 3,063
Commercial loans | Multifamily construction |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 0 | (198)
Financing receivable, year two | 9,013 | 56,013
Financing receivable, year three | 64,508 | 112,234
Financing receivable, year four | 119,609 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 193,130 | 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 | 9,013 | 56,013
Financing receivable, year three | 54,134 | 112,234
Financing receivable, year four | 119,609 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 182,756 | 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 | 10,374 | 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 | 10,374 | 0
Commercial loans | CRE construction |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 0 | 7
Financing receivable, year two | 6 | 0
Financing receivable, year three | 0 | 14,685
Financing receivable, year four | 14,686 | 3,821
Financing receivable, year five | 3,824 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 18,516 | 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 | 6 | 0
Financing receivable, year three | 0 | 14,685
Financing receivable, year four | 14,686 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 14,692 | 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 | 3,824 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,824 | 3,821
Commercial loans | Single family construction |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 28,174 | 75,305
Financing receivable, year two | 72,899 | 39,621
Financing receivable, year three | 21,050 | 12,294
Financing receivable, year four | 10,036 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 71 | 72
Revolving | 146,445 | 146,758
Revolving-term | 0 | 0
Total | 278,675 | 274,050
Commercial loans | Single family construction | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 28,174 | 75,305
Financing receivable, year two | 72,899 | 39,621
Financing receivable, year three | 21,050 | 12,294
Financing receivable, year four | 10,036 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 71 | 72
Revolving | 146,445 | 146,758
Revolving-term | 0 | 0
Total | 278,675 | 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 | 781 | 27,114
Financing receivable, year two | 29,592 | 56,469
Financing receivable, year three | 40,126 | 19,871
Financing receivable, year four | 12,223 | 1,850
Financing receivable, year five | 2,109 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 84,831 | 105,304
Commercial loans | Single family construction to permanent | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 781 | 27,114
Financing receivable, year two | 29,592 | 56,469
Financing receivable, year three | 40,126 | 19,871
Financing receivable, year four | 12,223 | 1,850
Financing receivable, year five | 2,109 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 84,831 | 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 | 1,002 | 14,331
Financing receivable, year two | 13,249 | 69,877
Financing receivable, year three | 67,757 | 48,919
Financing receivable, year four | 46,872 | 43,399
Financing receivable, year five | 43,039 | 68,601
Financing receivable, prior to year five | 209,837 | 145,034
Revolving | 0 | 2
Revolving-term | 187 | 1,122
Total | 381,943 | 391,285
Commercial loans | Owner occupied CRE | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,002 | 12,459
Financing receivable, year two | 11,398 | 68,399
Financing receivable, year three | 61,519 | 39,629
Financing receivable, year four | 38,795 | 43,399
Financing receivable, year five | 43,039 | 65,392
Financing receivable, prior to year five | 173,406 | 111,199
Revolving | 0 | 2
Revolving-term | 187 | 1,122
Total | 329,346 | 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 | 1,851 | 1,478
Financing receivable, year three | 6,238 | 9,290
Financing receivable, year four | 8,077 | 0
Financing receivable, year five | 0 | 2,956
Financing receivable, prior to year five | 31,735 | 28,784
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 47,901 | 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 | 4,696 | 5,051
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 4,696 | 5,305
Commercial loans | Commercial business |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 25,923 | 17,970
Financing receivable, year two | 17,625 | 57,357
Financing receivable, year three | 56,058 | 32,252
Financing receivable, year four | 29,631 | 41,005
Financing receivable, year five | 39,362 | 20,438
Financing receivable, prior to year five | 43,704 | 26,827
Revolving | 174,182 | 162,162
Revolving-term | 979 | 1,038
Total | 387,464 | 359,049
Commercial loans | Commercial business | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 25,923 | 17,970
Financing receivable, year two | 17,625 | 45,892
Financing receivable, year three | 44,752 | 27,227
Financing receivable, year four | 25,010 | 33,404
Financing receivable, year five | 32,020 | 16,198
Financing receivable, prior to year five | 38,288 | 24,903
Revolving | 170,397 | 157,656
Revolving-term | 924 | 973
Total | 354,939 | 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 | 11,033 | 2,891
Financing receivable, year four | 3,515 | 0
Financing receivable, year five | 0 | 452
Financing receivable, prior to year five | 511 | 38
Revolving | 2,762 | 3,485
Revolving-term | 0 | 0
Total | 17,821 | 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 | 0 | 0
Financing receivable, year three | 273 | 2,134
Financing receivable, year four | 1,106 | 7,601
Financing receivable, year five | 7,342 | 3,788
Financing receivable, prior to year five | 4,905 | 1,886
Revolving | 1,023 | 1,021
Revolving-term | 55 | 65
Total | 14,704 | 16,495
Consumer loans |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,106 | 29,185
Financing receivable, year two | 33,161 | 357,189
Financing receivable, year three | 373,052 | 314,177
Financing receivable, year four | 314,661 | 147,304
Financing receivable, year five | 146,222 | 49,172
Financing receivable, prior to year five | 288,310 | 250,057
Revolving | 375,157 | 371,845
Revolving-term | 5,421 | 5,651
Total | 1,537,090 | 1,524,580
Consumer loans | Single family |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 576 | 27,011
Financing receivable, year two | 31,388 | 354,691
Financing receivable, year three | 370,769 | 313,866
Financing receivable, year four | 314,411 | 147,183
Financing receivable, year five | 146,110 | 49,126
Financing receivable, prior to year five | 286,686 | 248,402
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 1,149,940 | 1,140,279
Consumer loans | Single family | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 576 | 27,011
Financing receivable, year two | 31,388 | 354,691
Financing receivable, year three | 370,769 | 313,866
Financing receivable, year four | 314,411 | 147,183
Financing receivable, year five | 145,739 | 49,126
Financing receivable, prior to year five | 284,386 | 245,574
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 1,147,269 | 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 | 1,298 | 781
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 1,298 | 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 | 371 | 0
Financing receivable, prior to year five | 461 | 1,374
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 832 | 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 | 541 | 673
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 541 | 673
Consumer loans | Home equity and other |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 530 | 2,174
Financing receivable, year two | 1,773 | 2,498
Financing receivable, year three | 2,283 | 311
Financing receivable, year four | 250 | 121
Financing receivable, year five | 112 | 46
Financing receivable, prior to year five | 1,624 | 1,655
Revolving | 375,157 | 371,845
Revolving-term | 5,421 | 5,651
Total | 387,150 | 384,301
Consumer loans | Home equity and other | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 530 | 2,165
Financing receivable, year two | 1,763 | 2,493
Financing receivable, year three | 2,279 | 311
Financing receivable, year four | 248 | 121
Financing receivable, year five | 112 | 46
Financing receivable, prior to year five | 1,600 | 1,631
Revolving | 373,327 | 370,462
Revolving-term | 5,296 | 5,483
Total | 385,155 | 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 | 0 | 0
Financing receivable, year four | 2 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 646 | 802
Revolving-term | 80 | 162
Total | 730 | 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 | 0 | 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 | 68 | 419
Revolving-term | 0 | 0
Total | 70 | 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 | 8 | 0
Financing receivable, year three | 2 | 0
Financing receivable, year four | 0 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 24 | 24
Revolving | 1,116 | 162
Revolving-term | 45 | 6
Total | $ 1,195 | $ 192

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