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Allowance for Credit Losses and Credit Quality of Loans, 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 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
Minimum number of days past due for loans to be considered nonperforming |  |  | 90 days |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | $ 1,116,149 |  | $ 1,116,149 | $ 1,444,621
2023/2022 | 1,252,819 |  | 1,252,819 | 1,989,711
2022/2021 | 1,840,946 |  | 1,840,946 | 1,688,309
2021/2020 | 1,488,670 |  | 1,488,670 | 1,019,863
2020/2019 | 915,395 |  | 915,395 | 692,961
Prior | 2,224,707 |  | 2,224,707 | 1,840,266
Revolving Loans Amortized Cost Basis | 989,995 |  | 989,995 | 920,868
Revolving Loans Converted to Term | 78,360 |  | 78,360 | 54,114
Total | 9,907,041 |  | 9,907,041 | 9,650,713
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | (549) | (1,161)
2023/2022 |  |  | (1,893) | (9,878)
2022/2021 |  |  | (7,094) | (9,586)
2021/2020 |  |  | (4,813) | (1,830)
2020/2019 |  |  | (1,008) | (1,805)
Prior |  |  | (3,027) | (2,518)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total | (6,077) | $ (6,321) | (18,384) | (26,778)
C&I [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 207,281 |  | 207,281 | 231,165
2023/2022 | 192,347 |  | 192,347 | 274,930
2022/2021 | 216,637 |  | 216,637 | 243,881
2021/2020 | 195,721 |  | 195,721 | 161,857
2020/2019 | 131,758 |  | 131,758 | 76,826
Prior | 113,264 |  | 113,264 | 71,313
Revolving Loans Amortized Cost Basis | 402,228 |  | 402,228 | 333,003
Revolving Loans Converted to Term | 1,269 |  | 1,269 | 4,530
Total | 1,460,505 |  | 1,460,505 | 1,397,505
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | 0 | (24)
2023/2022 |  |  | (60) | (3,021)
2022/2021 |  |  | (970) | (5)
2021/2020 |  |  | (46) | (86)
2020/2019 |  |  | 0 | 0
Prior |  |  | (1,325) | (600)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total |  |  | (2,401) | (3,736)
C&I [Member] | Pass [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 205,707 |  | 205,707 | 229,249
2023/2022 | 185,044 |  | 185,044 | 270,796
2022/2021 | 210,068 |  | 210,068 | 241,993
2021/2020 | 193,872 |  | 193,872 | 158,051
2020/2019 | 128,275 |  | 128,275 | 74,469
Prior | 106,919 |  | 106,919 | 63,826
Revolving Loans Amortized Cost Basis | 354,396 |  | 354,396 | 299,248
Revolving Loans Converted to Term | 1,006 |  | 1,006 | 2,923
Total | 1,385,287 |  | 1,385,287 | 1,340,555
C&I [Member] | Special Mention [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 420
2023/2022 | 3,627 |  | 3,627 | 1,672
2022/2021 | 4,333 |  | 4,333 | 277
2021/2020 | 354 |  | 354 | 3,524
2020/2019 | 3,273 |  | 3,273 | 87
Prior | 1,237 |  | 1,237 | 1,854
Revolving Loans Amortized Cost Basis | 29,624 |  | 29,624 | 19,489
Revolving Loans Converted to Term | 156 |  | 156 | 0
Total | 42,604 |  | 42,604 | 27,323
C&I [Member] | Substandard [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 1,574 |  | 1,574 | 1,496
2023/2022 | 3,590 |  | 3,590 | 2,461
2022/2021 | 2,234 |  | 2,234 | 1,609
2021/2020 | 1,465 |  | 1,465 | 282
2020/2019 | 210 |  | 210 | 2,266
Prior | 5,108 |  | 5,108 | 5,632
Revolving Loans Amortized Cost Basis | 18,208 |  | 18,208 | 14,266
Revolving Loans Converted to Term | 107 |  | 107 | 1,607
Total | 32,496 |  | 32,496 | 29,619
C&I [Member] | Doubtful [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 0
2023/2022 | 86 |  | 86 | 1
2022/2021 | 2 |  | 2 | 2
2021/2020 | 30 |  | 30 | 0
2020/2019 | 0 |  | 0 | 4
Prior | 0 |  | 0 | 1
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 118 |  | 118 | 8
CRE [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 321,437 |  | 321,437 | 357,108
2023/2022 | 347,167 |  | 347,167 | 523,404
2022/2021 | 563,876 |  | 563,876 | 594,415
2021/2020 | 551,739 |  | 551,739 | 460,311
2020/2019 | 434,137 |  | 434,137 | 340,767
Prior | 1,031,068 |  | 1,031,068 | 816,067
Revolving Loans Amortized Cost Basis | 308,668 |  | 308,668 | 307,971
Revolving Loans Converted to Term | 60,991 |  | 60,991 | 33,705
Total | 3,619,083 |  | 3,619,083 | 3,433,748
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | 0 | 0
2023/2022 |  |  | 0 | 0
2022/2021 |  |  | 0 | 0
2021/2020 |  |  | 0 | 0
2020/2019 |  |  | 0 | (114)
Prior |  |  | 0 | (304)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total |  |  | 0 | (418)
CRE [Member] | Pass [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 320,351 |  | 320,351 | 353,161
2023/2022 | 340,273 |  | 340,273 | 518,201
2022/2021 | 531,189 |  | 531,189 | 561,897
2021/2020 | 528,054 |  | 528,054 | 452,110
2020/2019 | 425,647 |  | 425,647 | 327,804
Prior | 954,218 |  | 954,218 | 739,189
Revolving Loans Amortized Cost Basis | 304,846 |  | 304,846 | 294,039
Revolving Loans Converted to Term | 59,356 |  | 59,356 | 33,705
Total | 3,463,934 |  | 3,463,934 | 3,280,106
CRE [Member] | Special Mention [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 1,086 |  | 1,086 | 3,577
2023/2022 | 5,838 |  | 5,838 | 4,472
2022/2021 | 13,492 |  | 13,492 | 10,711
2021/2020 | 5,873 |  | 5,873 | 7,055
2020/2019 | 5,137 |  | 5,137 | 9,967
Prior | 18,463 |  | 18,463 | 39,460
Revolving Loans Amortized Cost Basis | 2,156 |  | 2,156 | 2,970
Revolving Loans Converted to Term | 1,135 |  | 1,135 | 0
Total | 53,180 |  | 53,180 | 78,212
CRE [Member] | Substandard [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 370
2023/2022 | 1,056 |  | 1,056 | 731
2022/2021 | 19,195 |  | 19,195 | 21,807
2021/2020 | 17,812 |  | 17,812 | 1,146
2020/2019 | 3,353 |  | 3,353 | 2,996
Prior | 58,387 |  | 58,387 | 37,418
Revolving Loans Amortized Cost Basis | 1,666 |  | 1,666 | 10,962
Revolving Loans Converted to Term | 500 |  | 500 | 0
Total | 101,969 |  | 101,969 | 75,430
Auto [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 428,488 |  | 428,488 | 474,901
2023/2022 | 357,230 |  | 357,230 | 364,757
2022/2021 | 268,588 |  | 268,588 | 158,081
2021/2020 | 104,711 |  | 104,711 | 42,834
2020/2019 | 24,206 |  | 24,206 | 45,712
Prior | 21,066 |  | 21,066 | 13,145
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 12
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 1,204,289 |  | 1,204,289 | 1,099,442
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | (76) | (102)
2023/2022 |  |  | (1,047) | (1,183)
2022/2021 |  |  | (1,266) | (1,066)
2021/2020 |  |  | (692) | (340)
2020/2019 |  |  | (74) | (301)
Prior |  |  | (292) | (295)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total |  |  | (3,447) | (3,287)
Auto [Member] | Performing [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 428,158 |  | 428,158 | 474,369
2023/2022 | 356,542 |  | 356,542 | 363,516
2022/2021 | 267,785 |  | 267,785 | 157,251
2021/2020 | 104,174 |  | 104,174 | 42,644
2020/2019 | 24,059 |  | 24,059 | 45,406
Prior | 20,973 |  | 20,973 | 13,071
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 12
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 1,201,691 |  | 1,201,691 | 1,096,269
Auto [Member] | Nonperforming [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 330 |  | 330 | 532
2023/2022 | 688 |  | 688 | 1,241
2022/2021 | 803 |  | 803 | 830
2021/2020 | 537 |  | 537 | 190
2020/2019 | 147 |  | 147 | 306
Prior | 93 |  | 93 | 74
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 2,598 |  | 2,598 | 3,173
Residential Solar [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 2,835 |  | 2,835 | 155,425
2023/2022 | 126,279 |  | 126,279 | 431,692
2022/2021 | 406,636 |  | 406,636 | 179,044
2021/2020 | 169,604 |  | 169,604 | 65,400
2020/2019 | 59,055 |  | 59,055 | 46,601
Prior | 75,250 |  | 75,250 | 39,593
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 839,659 |  | 839,659 | 917,755
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | 0 | (150)
2023/2022 |  |  | (441) | (1,930)
2022/2021 |  |  | (3,152) | (923)
2021/2020 |  |  | (582) | (45)
2020/2019 |  |  | (103) | (558)
Prior |  |  | (561) | (345)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total |  |  | (4,839) | (3,951)
Residential Solar [Member] | Performing [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 2,835 |  | 2,835 | 155,425
2023/2022 | 126,251 |  | 126,251 | 430,855
2022/2021 | 405,550 |  | 405,550 | 178,839
2021/2020 | 169,484 |  | 169,484 | 65,382
2020/2019 | 58,968 |  | 58,968 | 46,554
Prior | 75,097 |  | 75,097 | 39,540
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 838,185 |  | 838,185 | 916,595
Residential Solar [Member] | Nonperforming [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 0
2023/2022 | 28 |  | 28 | 837
2022/2021 | 1,086 |  | 1,086 | 205
2021/2020 | 120 |  | 120 | 18
2020/2019 | 87 |  | 87 | 47
Prior | 153 |  | 153 | 53
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 0 |  | 0 | 0
Total | 1,474 |  | 1,474 | 1,160
Other Consumer [Member] |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
Overdrawn deposit related to gross charge-offs reported as 2022 originations |  |  |  | 200
Overdrawn deposit related to gross charge-offs reported as 2023 originations |  |  | 200 | 800
Overdrawn deposit related to gross charge-offs reported as 2024 originations |  |  | 500 |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 14,484 |  | 14,484 | 13,089
2023/2022 | 7,779 |  | 7,779 | 27,638
2022/2021 | 15,383 |  | 15,383 | 58,561
2021/2020 | 33,101 |  | 33,101 | 21,231
2020/2019 | 13,141 |  | 13,141 | 14,604
Prior | 18,718 |  | 18,718 | 16,125
Revolving Loans Amortized Cost Basis | 21,059 |  | 21,059 | 19,046
Revolving Loans Converted to Term | 43 |  | 43 | 66
Total | 123,708 |  | 123,708 | 170,360
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | (473) | (885)
2023/2022 |  |  | (311) | (3,744)
2022/2021 |  |  | (1,706) | (7,511)
2021/2020 |  |  | (3,493) | (1,329)
2020/2019 |  |  | (831) | (832)
Prior |  |  | (735) | (568)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total |  |  | (7,549) | (14,869)
Other Consumer [Member] | Performing [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 14,484 |  | 14,484 | 13,089
2023/2022 | 7,740 |  | 7,740 | 27,394
2022/2021 | 15,144 |  | 15,144 | 57,876
2021/2020 | 32,682 |  | 32,682 | 21,087
2020/2019 | 13,025 |  | 13,025 | 14,548
Prior | 18,494 |  | 18,494 | 15,964
Revolving Loans Amortized Cost Basis | 21,058 |  | 21,058 | 19,042
Revolving Loans Converted to Term | 23 |  | 23 | 21
Total | 122,650 |  | 122,650 | 169,021
Other Consumer [Member] | Nonperforming [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 0
2023/2022 | 39 |  | 39 | 244
2022/2021 | 239 |  | 239 | 685
2021/2020 | 419 |  | 419 | 144
2020/2019 | 116 |  | 116 | 56
Prior | 224 |  | 224 | 161
Revolving Loans Amortized Cost Basis | 1 |  | 1 | 4
Revolving Loans Converted to Term | 20 |  | 20 | 45
Total | 1,058 |  | 1,058 | 1,339
Residential [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 141,624 |  | 141,624 | 212,933
2023/2022 | 222,017 |  | 222,017 | 367,290
2022/2021 | 369,826 |  | 369,826 | 454,327
2021/2020 | 433,794 |  | 433,794 | 268,230
2020/2019 | 253,098 |  | 253,098 | 168,451
Prior | 965,341 |  | 965,341 | 884,023
Revolving Loans Amortized Cost Basis | 258,040 |  | 258,040 | 260,836
Revolving Loans Converted to Term | 16,057 |  | 16,057 | 15,813
Total | 2,659,797 |  | 2,659,797 | 2,631,903
Gross Charge-offs by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 |  |  | 0 | 0
2023/2022 |  |  | (34) | 0
2022/2021 |  |  | 0 | (81)
2021/2020 |  |  | 0 | (30)
2020/2019 |  |  | 0 | 0
Prior |  |  | (114) | (406)
Revolving Loans Amortized Cost Basis |  |  | 0 | 0
Revolving Loans Converted to Term |  |  | 0 | 0
Total | (34) | $ (16) | (148) | (517)
Residential [Member] | Performing [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 141,624 |  | 141,624 | 212,799
2023/2022 | 221,221 |  | 221,221 | 366,860
2022/2021 | 369,507 |  | 369,507 | 453,206
2021/2020 | 432,012 |  | 432,012 | 267,845
2020/2019 | 252,908 |  | 252,908 | 167,860
Prior | 956,789 |  | 956,789 | 876,563
Revolving Loans Amortized Cost Basis | 258,040 |  | 258,040 | 260,836
Revolving Loans Converted to Term | 15,968 |  | 15,968 | 15,300
Total | 2,648,069 |  | 2,648,069 | 2,621,269
Residential [Member] | Nonperforming [Member] |  |  |  |
Credit Quality by Loan Class by Vintage [Abstract] |  |  |  |
2024/2023 | 0 |  | 0 | 134
2023/2022 | 796 |  | 796 | 430
2022/2021 | 319 |  | 319 | 1,121
2021/2020 | 1,782 |  | 1,782 | 385
2020/2019 | 190 |  | 190 | 591
Prior | 8,552 |  | 8,552 | 7,460
Revolving Loans Amortized Cost Basis | 0 |  | 0 | 0
Revolving Loans Converted to Term | 89 |  | 89 | 513
Total | $ 11,728 |  | $ 11,728 | $ 10,634

X
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- Definition The threshold period past due for a loan to be considered nonperforming, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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