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Loans and Allowance for Loan Losses ("ALLL") - Additional Information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($)
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Balance of SBA and USDA loans and participations serviced | $ 14,300,000 | $ 19,300,000 |
Overdrafts included in loans | 2,700,000 | 1,300,000 |
Pledged loans for borrowing lines at FHLB and FRB | 2,553,227,000 | 1,714,103,000 |
Balance of main street lending program loans and participations serviced | 58,000,000 | 56,300,000 |
Main street lending program loans outstanding | 3,100,000 | 4,800,000 |
Purchased loans | 9,600,000 | 12,800,000 |
Unamortized premiums | 167,000 | 223,000 |
Purchased participation loans | 63,900,000 | 27,900,000 |
Recorded Investment 90 Days or More Past Due and Still Accruing | $ 26,095,000 | $ 1,506,000 |
Threshold period for past due loans (in days) | 90 days |  |
Number of loans restructured as troubled debt restructurings | loan | 0 | 0 |
Additional funds to borrowers with troubled debt restructurings | $ 0 |  |
Troubled debt restructuring | 0 | $ 0 |
Loans receivable | 2,627,256,000 | 1,742,735,000 |
Net charge-offs | $ 74,029,000 | 28,632,000 | $ 19,262,000
CCBX |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Company's responsibility for credit losses (in percent) | 10.00% |  |
Loans receivable | $ 114,500,000 |  |
Amount of loans that company is responsible for credit loss | $ 11,500,000 |  |
Partner's responsibility for credit losses (in percent) | 90.00% |  |
Partner's responsibility for fraud losses (in percentage) | 100.00% |  |
Percentage of revenue earned by company on loans they are responsible for credit losses | 100.00% |  |
Net charge-offs | $ 216,000 |  |
Federal Home Loan Bank Advances |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Pledged loans for borrowing lines at FHLB and FRB | $ 220,100,000 | 183,500,000 |
Minimum |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Percentage of collateral coverage to loan balance | 100.00% |  |
Loan repayment extended period of time | 6 months |  |
Sustained repayment performance period of loan placed on nonaccrual | 6 months |  |
Community Bank Overdrafts |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Overdrafts included in loans | $ 94,000 | 13,000 |
CCBX Overdrafts |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Overdrafts included in loans | 2,600,000 | 1,300,000 |
CCBX Loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Consumer and other loans | 607,000,000 | 106,800,000 |
Commercial and industrial loans | 11,300,000 | 281,000 |
Residential real estate loans | 244,600,000 | 36,900,000 |
Unsecured C C B X Loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Commercial and industrial loans | 14,900,000 | 0 |
Commercial and industrial loans - capital call lines |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Commercial and industrial loans | 146,000,000 | 202,900,000 |
Commercial and industrial loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Capital call lines, provided to venture capital firms |  | 202,900,000 |
Net charge-offs | 4,831,000 | 3,221,000 | $ 3,353,000
Commercial and industrial loans | CARES Act Paycheck Protection Program |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Balance of SBA and USDA loans and participations serviced | $ 4,700,000 | 111,800,000 |
Commercial and industrial loans | Small Business Administration |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Percentage of unsecured, guaranteed and loan | 100.00% |  |
Consumer Loans | CCBX Loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Purchased loans | $ 157,400,000 | 59,700,000 |
Consumer and other loans | $ 146,100,000 | $ 59,400,000 |
Consumer Portfolio Segment | Installment/Closed-End Consumer Loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Threshold period for past due loans (in days) | 120 days |  |
Threshold period for past due loans, charge off (in days) | 120 days |  |
Consumer Portfolio Segment | Revolving/Open-End Consumer Loans |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Threshold period for past due loans (in days) | 180 days |  |
Threshold period for past due loans, charge off (in days) | 180 days |  |

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