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LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | $ 254,942 | $ 2,544,193
Financing receivable, year two | 2,525,766 | 1,797,256
Financing receivable, year three | 1,781,690 | 875,008
Financing receivable, year four | 779,505 | 533,369
Financing receivable, year five | 470,070 | 255,162
Financing receivable, prior to year five | 977,921 | 814,005
Revolving | 641,952 | 599,278
Revolving-term | 8,655 | 8,049
Total | 7,440,501 | 7,426,320
Recurring |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Single family LHFI | 1,225 | 5,868
Level 3 | Recurring |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Single family LHFI | 1,225 | 5,868
30-59 days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 4,081 | 4,823
60-89 days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 1,613 | 2,020
90+ days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Total | 3,337 | 4,372
Commercial loans |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 237,287 | 2,266,245
Financing receivable, year two | 2,200,543 | 1,542,597
Financing receivable, year three | 1,476,462 | 722,015
Financing receivable, year four | 630,723 | 483,627
Financing receivable, year five | 420,571 | 210,966
Financing receivable, prior to year five | 717,946 | 577,415
Revolving | 284,117 | 257,715
Revolving-term | 2,333 | 4,032
Total | 5,969,982 | 6,064,612
Commercial loans | Non-owner occupied CRE |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,514 | 68,301
Financing receivable, year two | 70,440 | 68,356
Financing receivable, year three | 68,131 | 42,181
Financing receivable, year four | 41,245 | 139,760
Financing receivable, year five | 136,433 | 89,899
Financing receivable, prior to year five | 314,560 | 246,786
Revolving | 760 | 2,016
Revolving-term | 0 | 786
Total | 633,083 | 658,085
Commercial loans | Non-owner occupied CRE | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,514 | 68,301
Financing receivable, year two | 70,440 | 68,356
Financing receivable, year three | 68,131 | 42,181
Financing receivable, year four | 41,245 | 139,760
Financing receivable, year five | 119,562 | 87,197
Financing receivable, prior to year five | 280,125 | 242,544
Revolving | 599 | 2,016
Revolving-term | 0 | 786
Total | 581,616 | 651,141
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 | 2,702
Financing receivable, prior to year five | 34,435 | 4,242
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 34,435 | 6,944
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 | 16,871 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 161 | 0
Revolving-term | 0 | 0
Total | 17,032 | 0
Commercial loans | Multifamily |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 108,330 | 1,828,568
Financing receivable, year two | 1,815,620 | 1,165,434
Financing receivable, year three | 1,157,091 | 532,970
Financing receivable, year four | 496,707 | 241,808
Financing receivable, year five | 192,749 | 59,340
Financing receivable, prior to year five | 186,712 | 147,634
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,957,209 | 3,975,754
Commercial loans | Multifamily | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 108,330 | 1,828,568
Financing receivable, year two | 1,815,620 | 1,165,434
Financing receivable, year three | 1,153,149 | 528,077
Financing receivable, year four | 483,726 | 221,974
Financing receivable, year five | 190,380 | 59,340
Financing receivable, prior to year five | 179,339 | 140,126
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,930,544 | 3,943,519
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 | 3,942 | 4,893
Financing receivable, year four | 12,981 | 19,834
Financing receivable, year five | 2,369 | 0
Financing receivable, prior to year five | 4,290 | 7,508
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 23,582 | 32,235
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 | 3,083 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,083 | 0
Commercial loans | Multifamily construction |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | (206) | 18,110
Financing receivable, year two | 41,430 | 63,394
Financing receivable, year three | 100,778 | 13,613
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 | 142,002 | 95,117
Commercial loans | Multifamily construction | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | (206) | 18,110
Financing receivable, year two | 41,430 | 63,394
Financing receivable, year three | 100,778 | 13,613
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 | 142,002 | 95,117
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 | 7 | 341
Financing receivable, year two | 0 | 14,348
Financing receivable, year three | 14,459 | 3,960
Financing receivable, year four | 3,871 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 305
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 18,337 | 18,954
Commercial loans | CRE construction | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 7 | 341
Financing receivable, year two | 0 | 14,348
Financing receivable, year three | 14,459 | 3,960
Financing receivable, year four | 0 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 305
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 14,466 | 18,954
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 | 3,871 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 3,871 | 0
Commercial loans | Single family construction |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 62,297 | 149,133
Financing receivable, year two | 60,609 | 57,718
Financing receivable, year three | 18,552 | 24,807
Financing receivable, year four | 0 | 519
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 72 | 74
Revolving | 126,829 | 123,303
Revolving-term | 0 | 0
Total | 268,359 | 355,554
Commercial loans | Single family construction | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 62,297 | 149,133
Financing receivable, year two | 56,402 | 50,936
Financing receivable, year three | 17,502 | 24,807
Financing receivable, year four | 0 | 519
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 72 | 74
Revolving | 126,829 | 123,303
Revolving-term | 0 | 0
Total | 263,102 | 348,772
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 | 4,207 | 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 | 4,207 | 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 | 6,782
Financing receivable, year three | 1,050 | 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 | 1,050 | 6,782
Commercial loans | Single family construction to permanent |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 23,201 | 66,034
Financing receivable, year two | 82,282 | 76,814
Financing receivable, year three | 30,299 | 11,128
Financing receivable, year four | 1,809 | 3,268
Financing receivable, year five | 0 | 794
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 137,591 | 158,038
Commercial loans | Single family construction to permanent | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 23,201 | 66,034
Financing receivable, year two | 82,282 | 76,814
Financing receivable, year three | 30,299 | 11,128
Financing receivable, year four | 1,809 | 3,268
Financing receivable, year five | 0 | 794
Financing receivable, prior to year five | 0 | 0
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 137,591 | 158,038
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 | 12,638 | 70,192
Financing receivable, year two | 71,137 | 52,662
Financing receivable, year three | 48,241 | 44,778
Financing receivable, year four | 41,918 | 71,652
Financing receivable, year five | 68,744 | 44,785
Financing receivable, prior to year five | 184,669 | 158,187
Revolving | 1 | 3
Revolving-term | 905 | 1,104
Total | 428,253 | 443,363
Commercial loans | Owner occupied CRE | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 10,747 | 70,192
Financing receivable, year two | 69,650 | 51,919
Financing receivable, year three | 40,278 | 44,778
Financing receivable, year four | 41,918 | 71,652
Financing receivable, year five | 66,055 | 36,457
Financing receivable, prior to year five | 143,484 | 139,691
Revolving | 1 | 3
Revolving-term | 905 | 1,104
Total | 373,038 | 415,796
Commercial loans | Owner occupied CRE | Special Mention |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,891 | 0
Financing receivable, year two | 1,487 | 743
Financing receivable, year three | 7,963 | 0
Financing receivable, year four | 0 | 0
Financing receivable, year five | 2,689 | 6,179
Financing receivable, prior to year five | 34,784 | 13,485
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 48,814 | 20,407
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 | 0
Financing receivable, year four | 0 | 0
Financing receivable, year five | 0 | 2,149
Financing receivable, prior to year five | 6,401 | 5,011
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 6,401 | 7,160
Commercial loans | Commercial business |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 29,506 | 65,566
Financing receivable, year two | 59,025 | 43,871
Financing receivable, year three | 38,911 | 48,578
Financing receivable, year four | 45,173 | 26,620
Financing receivable, year five | 22,645 | 16,148
Financing receivable, prior to year five | 31,933 | 24,429
Revolving | 156,527 | 132,393
Revolving-term | 1,428 | 2,142
Total | 385,148 | 359,747
Commercial loans | Commercial business | Pass |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 29,506 | 65,566
Financing receivable, year two | 47,718 | 42,921
Financing receivable, year three | 33,317 | 45,940
Financing receivable, year four | 38,177 | 18,594
Financing receivable, year five | 18,217 | 13,548
Financing receivable, prior to year five | 27,702 | 18,779
Revolving | 152,176 | 130,427
Revolving-term | 1,354 | 2,041
Total | 348,167 | 337,816
Commercial loans | Commercial business | Special Mention |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 0 | 0
Financing receivable, year two | 11,307 | 612
Financing receivable, year three | 3,270 | 0
Financing receivable, year four | 0 | 3,577
Financing receivable, year five | 953 | 9
Financing receivable, prior to year five | 164 | 3,444
Revolving | 4,091 | 403
Revolving-term | 0 | 0
Total | 19,785 | 8,045
Commercial loans | Commercial business | Substandard |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 0 | 0
Financing receivable, year two | 0 | 338
Financing receivable, year three | 2,324 | 2,638
Financing receivable, year four | 6,996 | 4,449
Financing receivable, year five | 3,475 | 2,591
Financing receivable, prior to year five | 4,067 | 2,206
Revolving | 260 | 1,563
Revolving-term | 74 | 101
Total | 17,196 | 13,886
Consumer loans |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 17,655 | 277,948
Financing receivable, year two | 325,223 | 254,659
Financing receivable, year three | 305,228 | 152,993
Financing receivable, year four | 148,782 | 49,742
Financing receivable, year five | 49,499 | 44,196
Financing receivable, prior to year five | 259,975 | 236,590
Revolving | 357,835 | 341,563
Revolving-term | 6,322 | 4,017
Total | 1,470,519 | 1,361,708
Consumer loans | Single family |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 16,110 | 273,786
Financing receivable, year two | 322,349 | 253,937
Financing receivable, year three | 304,831 | 152,773
Financing receivable, year four | 148,640 | 49,592
Financing receivable, year five | 49,434 | 44,124
Financing receivable, prior to year five | 258,280 | 234,789
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 1,099,644 | 1,009,001
Consumer loans | Single family | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 16,110 | 273,786
Financing receivable, year two | 322,349 | 253,937
Financing receivable, year three | 304,831 | 152,773
Financing receivable, year four | 148,640 | 49,302
Financing receivable, year five | 49,434 | 43,511
Financing receivable, prior to year five | 254,394 | 231,277
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 1,095,758 | 1,004,586
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 | 340
Financing receivable, prior to year five | 525 | 2,113
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 525 | 2,453
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 | 461 | 258
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 461 | 258
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 | 290
Financing receivable, year five | 0 | 273
Financing receivable, prior to year five | 2,900 | 1,141
Revolving | 0 | 0
Revolving-term | 0 | 0
Total | 2,900 | 1,704
Consumer loans | Home equity and other |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,545 | 4,162
Financing receivable, year two | 2,874 | 722
Financing receivable, year three | 397 | 220
Financing receivable, year four | 142 | 150
Financing receivable, year five | 65 | 72
Financing receivable, prior to year five | 1,695 | 1,801
Revolving | 357,835 | 341,563
Revolving-term | 6,322 | 4,017
Total | 370,875 | 352,707
Consumer loans | Home equity and other | Current |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 1,542 | 4,156
Financing receivable, year two | 2,839 | 692
Financing receivable, year three | 393 | 220
Financing receivable, year four | 142 | 150
Financing receivable, year five | 65 | 72
Financing receivable, prior to year five | 1,670 | 1,593
Revolving | 356,808 | 340,567
Revolving-term | 6,223 | 4,017
Total | 369,682 | 351,467
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 | 4 | 6
Financing receivable, year three | 4 | 0
Financing receivable, year four | 0 | 0
Financing receivable, year five | 0 | 0
Financing receivable, prior to year five | 0 | 9
Revolving | 557 | 446
Revolving-term | 26 | 0
Total | 594 | 461
Consumer loans | Home equity and other | 60-89 days |  |
Financing Receivable, before Allowance for Credit Loss [Abstract] |  |
Financing receivable, year one | 0 | 6
Financing receivable, year two | 1 | 24
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 | 48
Revolving | 68 | 517
Revolving-term | 73 | 0
Total | 142 | 595
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 | 30 | 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 | 25 | 151
Revolving | 402 | 33
Revolving-term | 0 | 0
Total | $ 457 | $ 184

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