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Loans and Allowance for Credit Losses - Summary of Amortized Cost of CCBX Loans (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans receivable | $ 3,418,832 | $ 3,026,092
Total CCBX Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 295,715 | 263,853
2023, current period gross write-offs | 5,548 | 21,663
2023 | 160,260 | 60,918
2022, current period gross write-offs | 36,584 | 45,617
2022 | 33,490 | 7,374
2021, current period gross write-offs | 13,985 | 11,589
2021 | 3,543 | 109
2020, current period gross write-offs | 3,096 | 100
2020 | 60 | 425
2019, current period gross write-offs | 24 | 346
Prior | 308 | 327
Prior, current period gross write-offs | 254 | 217
Revolving Loans Amortized Cost Basis | 1,017,202 | 835,614
Revolving Loans Amortized Cost Basis, current period gross write-offs | 107,600 | 72,401
Revolving Loans Converted To Term | 11,161 | 27,618
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 1,521,739 | 1,196,238
Total, current period gross write-offs | 167,091 | 151,933
Commercial and industrial loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 7,450 | 15,882
2023, current period gross write-offs | 0 | 0
2023 | 12,757 | 56,428
2022, current period gross write-offs | 0 | 0
2022 | 44,470 | 15,566
2021, current period gross write-offs | 0 | 0
2021 | 13,751 | 10,155
2020, current period gross write-offs | 0 | 0
2020 | 8,652 | 12,429
2019, current period gross write-offs | 0 | 0
Prior | 8,202 | 1,442
Prior, current period gross write-offs | 167 | 46
Revolving Loans Amortized Cost Basis | 55,707 | 36,580
Revolving Loans Amortized Cost Basis, current period gross write-offs | 0 | 0
Revolving Loans Converted To Term | 1,172 | 1,020
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 152,161 | 149,502
Total, current period gross write-offs | 167 | 46
Commercial and industrial loans | Capital call lines | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023, current period gross write-offs | 0 | 0
2023 | 0 | 0
2022, current period gross write-offs | 0 | 0
2022 | 0 | 0
2021, current period gross write-offs | 0 | 0
2021 | 0 | 0
2020, current period gross write-offs | 0 | 0
2020 | 0 | 0
2019, current period gross write-offs | 0 | 0
Prior | 0 | 0
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 103,924 | 87,494
Revolving Loans Amortized Cost Basis, current period gross write-offs | 0 | 0
Revolving Loans Converted To Term | 0 | 0
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 103,924 | 87,494
Total, current period gross write-offs | 0 | 0
Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 43,600
2023, current period gross write-offs | 285 | 3,848
2023 | 27,440 | 7,112
2022, current period gross write-offs | 9,446 | 2,502
2022 | 4,474 | 9
2021, current period gross write-offs | 1,632 | 15
2021 | 5 | 11
2020, current period gross write-offs | 2 | 16
2020 | 9 | 0
2019, current period gross write-offs | 0 | 0
Prior | 0 | 0
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 4,566 | 3,566
Revolving Loans Amortized Cost Basis, current period gross write-offs | 887 | 224
Revolving Loans Converted To Term | 0 | 0
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 36,494 | 54,298
Total, current period gross write-offs | 12,252 | 6,605
Real Estate Portfolio Segment | Residential real estate loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 14,746 | 32,352
2023, current period gross write-offs | 0 | 0
2023 | 31,201 | 42,460
2022, current period gross write-offs | 0 | 0
2022 | 39,369 | 41,157
2021, current period gross write-offs | 0 | 0
2021 | 38,310 | 30,287
2020, current period gross write-offs | 0 | 0
2020 | 28,744 | 31,982
2019, current period gross write-offs | 0 | 0
Prior | 33,412 | 22,469
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 26,669 | 24,496
Revolving Loans Amortized Cost Basis, current period gross write-offs | 0 | 0
Revolving Loans Converted To Term | 16 | 188
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 212,467 | 225,391
Total, current period gross write-offs | 0 | 0
Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023, current period gross write-offs | 0 | 0
2023 | 0 | 0
2022, current period gross write-offs | 0 | 0
2022 | 0 | 0
2021, current period gross write-offs | 0 | 0
2021 | 0 | 0
2020, current period gross write-offs | 0 | 0
2020 | 0 | 0
2019, current period gross write-offs | 0 | 0
Prior | 0 | 0
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 254,294 | 213,550
Revolving Loans Amortized Cost Basis, current period gross write-offs | 3,297 | 4,641
Revolving Loans Converted To Term | 11,108 | 24,485
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 265,402 | 238,035
Total, current period gross write-offs | 3,297 | 4,641
Consumer and other loans: |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 252 | 323
2023, current period gross write-offs | 25 | 18
2023 | 57 | 272
2022, current period gross write-offs | 0 | 0
2022 | 9,076 | 5
2021, current period gross write-offs | 0 | 0
2021 | 3 | 679
2020, current period gross write-offs | 0 | 0
2020 | 657 | 38
2019, current period gross write-offs | 0 | 0
Prior | 3,930 | 164
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 198 | 147
Revolving Loans Amortized Cost Basis, current period gross write-offs | 0 | 0
Revolving Loans Converted To Term | 0 | 0
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 14,173 | 1,628
Total, current period gross write-offs | 25 | 18
Consumer and other loans: | Credit cards | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023, current period gross write-offs | 0 | 0
2023 | 0 | 0
2022, current period gross write-offs | 0 | 0
2022 | 0 | 0
2021, current period gross write-offs | 0 | 0
2021 | 0 | 0
2020, current period gross write-offs | 0 | 0
2020 | 0 | 0
2019, current period gross write-offs | 0 | 0
Prior | 0 | 0
Prior, current period gross write-offs | 0 | 0
Revolving Loans Amortized Cost Basis | 633,638 | 502,704
Revolving Loans Amortized Cost Basis, current period gross write-offs | 97,818 | 61,358
Revolving Loans Converted To Term | 53 | 3,133
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 633,691 | 505,837
Total, current period gross write-offs | 97,818 | 61,358
Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 295,715 | 220,253
2023, current period gross write-offs | 5,263 | 17,815
2023 | 132,820 | 53,806
2022, current period gross write-offs | 27,138 | 43,115
2022 | 29,016 | 7,365
2021, current period gross write-offs | 12,353 | 11,574
2021 | 3,538 | 98
2020, current period gross write-offs | 3,094 | 84
2020 | 51 | 425
2019, current period gross write-offs | 24 | 346
Prior | 308 | 327
Prior, current period gross write-offs | 254 | 217
Revolving Loans Amortized Cost Basis | 20,780 | 28,300
Revolving Loans Amortized Cost Basis, current period gross write-offs | 5,598 | 6,178
Revolving Loans Converted To Term | 0 | 0
Revolving Loans Converted To Term, current period gross write-offs | 0 | 0
Loans receivable | 482,228 | 310,574
Total, current period gross write-offs | 53,724 | 79,329
Performing Financial Instruments | Total CCBX Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 294,373 | 258,291
2023 | 156,326 | 57,567
2022 | 31,796 | 6,897
2021 | 3,287 | 109
2020 | 60 | 418
Prior | 261 | 317
Revolving Loans Amortized Cost Basis | 970,896 | 799,677
Revolving Loans Converted To Term | 11,161 | 26,438
Loans receivable | 1,468,160 | 1,149,714
Performing Financial Instruments | Commercial and industrial loans | Capital call lines | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 103,924 | 87,494
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 103,924 | 87,494
Performing Financial Instruments | Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 42,267
2023 | 26,555 | 6,835
2022 | 4,288 | 9
2021 | 5 | 11
2020 | 9 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 4,044 | 3,090
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 34,901 | 52,212
Performing Financial Instruments | Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 251,269 | 212,435
Revolving Loans Converted To Term | 11,108 | 24,485
Loans receivable | 262,377 | 236,920
Performing Financial Instruments | Consumer and other loans: | Credit cards | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 591,089 | 469,049
Revolving Loans Converted To Term | 53 | 1,953
Loans receivable | 591,142 | 471,002
Performing Financial Instruments | Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 294,373 | 216,024
2023 | 129,771 | 50,732
2022 | 27,508 | 6,888
2021 | 3,282 | 98
2020 | 51 | 418
Prior | 261 | 317
Revolving Loans Amortized Cost Basis | 20,570 | 27,609
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 475,816 | 302,086
Nonperforming Financial Instruments | Total CCBX Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 1,342 | 5,562
2023 | 3,934 | 3,351
2022 | 1,694 | 477
2021 | 256 | 0
2020 | 0 | 7
Prior | 47 | 10
Revolving Loans Amortized Cost Basis | 46,306 | 35,937
Revolving Loans Converted To Term | 0 | 1,180
Loans receivable | 53,579 | 46,524
Nonperforming Financial Instruments | Commercial and industrial loans | Capital call lines | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 0 | 0
Nonperforming Financial Instruments | Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 1,333
2023 | 885 | 277
2022 | 186 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 522 | 476
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 1,593 | 2,086
Nonperforming Financial Instruments | Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 3,025 | 1,115
Revolving Loans Converted To Term | 0 | 0
Loans receivable | 3,025 | 1,115
Nonperforming Financial Instruments | Consumer and other loans: | Credit cards | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 42,549 | 33,655
Revolving Loans Converted To Term | 0 | 1,180
Loans receivable | 42,549 | 34,835
Nonperforming Financial Instruments | Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2024 | 1,342 | 4,229
2023 | 3,049 | 3,074
2022 | 1,508 | 477
2021 | 256 | 0
2020 | 0 | 7
Prior | 47 | 10
Revolving Loans Amortized Cost Basis | 210 | 691
Revolving Loans Converted To Term | 0 | 0
Loans receivable | $ 6,412 | $ 8,488

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