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Loans Receivable and Allowance for Credit Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | $ 1,527 |  | $ 1,527 |  | $ 114,068
Year two | 114,138 |  | 114,138 |  | 199,200
Year three | 183,953 |  | 183,953 |  | 149,244
Year four | 140,443 |  | 140,443 |  | 23,262
Year five | 20,959 |  | 20,959 |  | 73,662
Prior | 189,464 |  | 189,464 |  | 161,255
Revolving | 105,187 |  | 105,187 |  | 128,168
Loans receivable, gross | 755,671 |  | 755,671 |  | 848,859
Current period gross charge-offs |  |  |  |  |
Year one |  |  | 0 |  | 114
Year two |  |  | 253 |  | 9,195
Year three |  |  | 4,900 |  | 1,515
Year four |  |  | 485 |  | 0
Year five |  |  | 0 |  | 6,863
Prior |  |  | 1,239 |  | 730
Revolving |  |  | 0 |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 1,512 | $ 3,548 | 6,877 | $ 8,016 | 18,417
Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 1,527 |  | 1,527 |  | 113,849
Year two | 112,944 |  | 112,944 |  | 189,926
Year three | 166,303 |  | 166,303 |  | 145,918
Year four | 119,033 |  | 119,033 |  | 22,982
Year five | 13,967 |  | 13,967 |  | 62,770
Prior | 174,473 |  | 174,473 |  | 159,460
Revolving | 103,898 |  | 103,898 |  | 127,990
Loans receivable, gross | 692,145 |  | 692,145 |  | 822,895
Special mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 6
Year two | 5 |  | 5 |  | 6,830
Year three | 12,712 |  | 12,712 |  | 2,464
Year four | 939 |  | 939 |  | 0
Year five | 1,053 |  | 1,053 |  | 37
Prior | 2,721 |  | 2,721 |  | 11
Revolving | 750 |  | 750 |  | 104
Loans receivable, gross | 18,180 |  | 18,180 |  | 9,452
Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 213
Year two | 1,189 |  | 1,189 |  | 2,444
Year three | 4,938 |  | 4,938 |  | 862
Year four | 20,471 |  | 20,471 |  | 280
Year five | 5,939 |  | 5,939 |  | 10,855
Prior | 12,270 |  | 12,270 |  | 1,784
Revolving | 539 |  | 539 |  | 74
Loans receivable, gross | 45,346 |  | 45,346 |  | 16,512
Commercial Real Estate |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 104,683
Year two | 107,779 |  | 107,779 |  | 146,372
Year three | 147,428 |  | 147,428 |  | 111,308
Year four | 107,614 |  | 107,614 |  | 3,681
Year five | 3,564 |  | 3,564 |  | 41,832
Prior | 85,770 |  | 85,770 |  | 64,217
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 452,155 |  | 452,155 |  | 472,093
Current period gross charge-offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 6,341
Prior |  |  | 282 |  | 5
Revolving |  |  | 0 |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 124 | 0 | 282 | 0 | 6,346
Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 104,683
Year two | 106,912 |  | 106,912 |  | 138,091
Year three | 130,761 |  | 130,761 |  | 111,308
Year four | 89,463 |  | 89,463 |  | 3,401
Year five | 3,331 |  | 3,331 |  | 31,832
Prior | 74,427 |  | 74,427 |  | 63,526
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 404,894 |  | 404,894 |  | 452,841
Commercial Real Estate | Special mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 6,482
Year three | 12,693 |  | 12,693 |  | 0
Year four | 899 |  | 899 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 436 |  | 436 |  | 0
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 14,028 |  | 14,028 |  | 6,482
Commercial Real Estate | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 867 |  | 867 |  | 1,799
Year three | 3,974 |  | 3,974 |  | 0
Year four | 17,252 |  | 17,252 |  | 280
Year five | 233 |  | 233 |  | 10,000
Prior | 10,907 |  | 10,907 |  | 691
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 33,233 |  | 33,233 |  | 12,770
Residential Real Estate |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 373 |  | 373 |  | 0
Year two | 0 |  | 0 |  | 1,251
Year three | 1,227 |  | 1,227 |  | 2,975
Year four | 2,831 |  | 2,831 |  | 11,577
Year five | 10,686 |  | 10,686 |  | 15,770
Prior | 78,721 |  | 78,721 |  | 74,596
Revolving | 741 |  | 741 |  | 614
Loans receivable, gross | 94,579 |  | 94,579 |  | 106,783
Current period gross charge-offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 21 |  | 515
Revolving |  |  | 0 |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | 113 | 21 | 113 | 515
Residential Real Estate | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 373 |  | 373 |  | 0
Year two | 0 |  | 0 |  | 1,251
Year three | 1,227 |  | 1,227 |  | 2,975
Year four | 2,831 |  | 2,831 |  | 11,577
Year five | 9,633 |  | 9,633 |  | 15,770
Prior | 77,192 |  | 77,192 |  | 74,596
Revolving | 741 |  | 741 |  | 614
Loans receivable, gross | 91,997 |  | 91,997 |  | 106,783
Residential Real Estate | Special mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  |
Year two | 0 |  | 0 |  |
Year three | 0 |  | 0 |  |
Year four | 0 |  | 0 |  |
Year five | 1,053 |  | 1,053 |  |
Prior | 1,398 |  | 1,398 |  |
Revolving | 0 |  | 0 |  |
Loans receivable, gross | 2,451 |  | 2,451 |  |
Residential Real Estate | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  |
Year two | 0 |  | 0 |  |
Year three | 0 |  | 0 |  |
Year four | 0 |  | 0 |  |
Year five | 0 |  | 0 |  |
Prior | 131 |  | 131 |  |
Revolving | 0 |  | 0 |  |
Loans receivable, gross | 131 |  | 131 |  |
Commercial and Industrial |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 872 |  | 872 |  | 2,718
Year two | 3,053 |  | 3,053 |  | 14,264
Year three | 14,754 |  | 14,754 |  | 23,900
Year four | 21,447 |  | 21,447 |  | 8,004
Year five | 6,709 |  | 6,709 |  | 10,016
Prior | 8,032 |  | 8,032 |  | 8,128
Revolving | 79,466 |  | 79,466 |  | 96,535
Loans receivable, gross | 134,333 |  | 134,333 |  | 163,565
Current period gross charge-offs |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 182
Year three |  |  | 0 |  | 85
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 516
Prior |  |  | 936 |  | 144
Revolving |  |  | 0 |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 122 | 423 | 936 | 429 | 927
Commercial and Industrial | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 872 |  | 872 |  | 2,696
Year two | 2,785 |  | 2,785 |  | 13,916
Year three | 14,230 |  | 14,230 |  | 23,099
Year four | 20,564 |  | 20,564 |  | 8,004
Year five | 1,003 |  | 1,003 |  | 9,578
Prior | 6,337 |  | 6,337 |  | 7,024
Revolving | 78,612 |  | 78,612 |  | 96,431
Loans receivable, gross | 124,403 |  | 124,403 |  | 160,748
Commercial and Industrial | Special mention |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 6
Year two | 5 |  | 5 |  | 348
Year three | 19 |  | 19 |  | 0
Year four | 40 |  | 40 |  | 0
Year five | 0 |  | 0 |  | 37
Prior | 887 |  | 887 |  | 11
Revolving | 750 |  | 750 |  | 104
Loans receivable, gross | 1,701 |  | 1,701 |  | 506
Commercial and Industrial | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 16
Year two | 263 |  | 263 |  | 0
Year three | 505 |  | 505 |  | 801
Year four | 843 |  | 843 |  | 0
Year five | 5,706 |  | 5,706 |  | 401
Prior | 808 |  | 808 |  | 1,093
Revolving | 104 |  | 104 |  | 0
Loans receivable, gross | 8,229 |  | 8,229 |  | 2,311
Consumer and Other |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 282 |  | 282 |  | 6,667
Year two | 3,306 |  | 3,306 |  | 37,313
Year three | 20,544 |  | 20,544 |  | 4,785
Year four | 2,365 |  | 2,365 |  | 0
Year five | 0 |  | 0 |  | 5,590
Prior | 16,941 |  | 16,941 |  | 14,314
Revolving | 24,980 |  | 24,980 |  | 31,019
Loans receivable, gross | 68,418 |  | 68,418 |  | 99,688
Current period gross charge-offs |  |  |  |  |
Year one |  |  | 0 |  | 114
Year two |  |  | 253 |  | 9,013
Year three |  |  | 4,900 |  | 1,280
Year four |  |  | 485 |  | 0
Year five |  |  | 0 |  | 6
Prior |  |  | 0 |  | 66
Revolving |  |  | 0 |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 1,266 | 3,012 | 5,638 | 7,324 | 10,479
Consumer and Other | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 282 |  | 282 |  | 6,470
Year two | 3,247 |  | 3,247 |  | 36,668
Year three | 20,085 |  | 20,085 |  | 4,724
Year four | 2,346 |  | 2,346 |  | 0
Year five | 0 |  | 0 |  | 5,590
Prior | 16,517 |  | 16,517 |  | 14,314
Revolving | 24,545 |  | 24,545 |  | 30,945
Loans receivable, gross | 67,022 |  | 67,022 |  | 98,711
Consumer and Other | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 197
Year two | 59 |  | 59 |  | 645
Year three | 459 |  | 459 |  | 61
Year four | 19 |  | 19 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 424 |  | 424 |  | 0
Revolving | 435 |  | 435 |  | 74
Loans receivable, gross | 1,396 |  | 1,396 |  | 977
Construction |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 3,812
Year four | 3,829 |  | 3,829 |  | 0
Year five | 0 |  | 0 |  | 454
Prior | 0 |  | 0 |  | 0
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 3,829 |  | 3,829 |  | 4,266
Current period gross charge-offs |  |  |  |  |
Year one |  |  |  |  | 0
Year two |  |  |  |  | 0
Year three |  |  |  |  | 150
Year four |  |  |  |  | 0
Year five |  |  |  |  | 0
Prior |  |  |  |  | 0
Revolving |  |  |  |  | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 | 150 | 150
Construction | Pass |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 3,812
Year four | 3,829 |  | 3,829 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 3,829 |  | 3,829 |  | 3,812
Construction | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  |  |  | 0
Year two |  |  |  |  | 0
Year three |  |  |  |  | 0
Year four |  |  |  |  | 0
Year five |  |  |  |  | 454
Prior |  |  |  |  | 0
Revolving |  |  |  |  | 0
Loans receivable, gross |  |  |  |  | 454
Construction to Permanent - CRE |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 2,464
Year four | 2,357 |  | 2,357 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | 2,357 |  | 2,357 |  | 2,464
Current period gross charge-offs |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | $ 0 | 0 | $ 0 |
Construction to Permanent - CRE | Substandard |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 2,464
Year four | 2,357 |  | 2,357 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving | 0 |  | 0 |  | 0
Loans receivable, gross | $ 2,357 |  | $ 2,357 |  | $ 2,464

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