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Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025 | Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Proceeds from sales of loans held for sale |  |  | $ 118 | $ 0 |  |  |  |
Transfer from loans to loans held for sale |  |  | 7,876,707 | 2,084,172 |  |  |  |
Loans held for sale | $ 107,838 |  | 107,838 |  |  | $ 71,216 |  |
Accrued interest on loans | 20,400 |  | 20,400 |  |  | 17,900 |  |
Accrued interest on loans, allowance | (639) |  | (639) |  |  | (616) |  |
Pledged loans | 3,994,546 |  | 3,994,546 |  |  | 3,580,001 |  |
Balance of SBA and USDA loans and participations sold and serviced | 2,300 |  | 2,300 |  |  | 2,500 |  |
Balance of main street lending program loans and participations serviced | 23,100 |  | 23,100 |  |  |  |  |
Purchased loans | 4,300 |  | 4,300 |  |  |  |  |
Unamortized premium | 81 |  | 81 |  |  | 84 |  |
Purchased participation loans | 24,000 |  | 24,000 |  |  | 26,900 |  |
90 Days or More Past Due and Still Accruing | $ 38,499 |  | $ 38,499 |  |  | 33,144 |  |
Threshold period for past due loans (in days) | 90 days |  | 90 days |  |  |  |  |
Accounts receivable, noncurrent, 90 days or more past due, still accruing |  |  |  |  |  | 33,100 |  |
Allowance for credit losses | $ 213,724 | $ 164,794 | $ 213,724 | 164,794 | $ 172,427 | 169,530 | $ 183,178 | $ 176,994
Loans receivable | 4,208,270 |  | 4,208,270 |  |  | 3,749,531 |  |
Gross loans receivable | 4,215,122 |  | 4,215,122 |  |  | 3,756,829 |  |
CCBX |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | 38,499 |  | 38,499 |  |  | 33,144 |  |
Provision (Recapture) For Unfunded Commitments | 12 | (182) | 23 | 602 |  |  |  |
Gross loans receivable | 2,226,296 |  | 2,226,296 |  |  | 1,808,094 |  |
Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | 0 |  | 0 |  |  | 0 |  |
Gross loans receivable | 1,988,826 |  | 1,988,826 |  |  | 1,948,735 |  |
Owner-Occupied Real Estate |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial real estate loans | 392,100 |  | 392,100 |  |  | 374,700 |  |
Non-Owner-Occupied Real Estate |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial real estate loans | 551,800 |  | 551,800 |  |  | 531,100 |  |
Multi-Family Residential Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial real estate loans | 362,100 |  | 362,100 |  |  | 367,900 |  |
Farmland Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial real estate loans | $ 13,800 |  | $ 13,800 |  |  | 12,200 |  |
CCBX |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Company's responsibility for credit losses (in percent) | 5.00% |  | 5.00% |  |  |  |  |
Loans receivable | $ 350,800 |  | $ 350,800 |  |  |  |  |
Amount of loans that company is responsible for credit loss | $ 23,400 |  | $ 23,400 |  |  |  |  |
Responsibility of partner, percentage | 95.00% |  | 95.00% |  |  |  |  |
Revenue earned, percentage | 100.00% |  | 100.00% |  |  |  |  |
Fraud losses, responsibility of partner, percentage | 100.00% |  | 100.00% |  |  |  |  |
CCBX | Less Than 90 Days Past Due |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Nonaccrual loans | $ 24,600 |  | $ 24,600 |  |  | 20,300 |  |
Minimum |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Sustained repayment performance period of loan placed on nonaccrual |  |  | 6 months |  |  |  |  |
Percentage of collateral coverage to loan balance |  |  | 100.00% |  |  |  |  |
Loan repayment extended period of time |  |  | 6 months |  |  |  |  |
Unfunded Loan Commitment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Provision (Recapture) For Unfunded Commitments | 213 | 1,500 | $ (1,100) | 2,100 |  |  |  |
Accounts Receivable |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Provision (Recapture) For Unfunded Commitments | 0 | 0 | 252 | 0 |  |  |  |
Asset Pledged as Collateral |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Pledged loans | 865,600 |  | 865,600 |  |  | 895,500 |  |
Commercial and industrial loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Capital call lines, provided to venture capital firms | 204,800 |  | 204,800 |  |  | 210,500 |  |
Balance of main street lending program loans and participations serviced | 1,200 |  | 1,200 |  |  |  |  |
Allowance for credit losses | 6,882 | 8,754 | 6,882 | 8,754 | 7,728 | 8,757 | 10,066 | 11,051
Loans receivable | 237,176 |  | 237,176 |  |  | 224,439 |  |
Consumer and other loans: |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Overdrafts included in loans | 35,500 |  | 35,500 |  |  | 16,900 |  |
Allowance for credit losses | 186,481 | 131,251 | 186,481 | 131,251 | 144,090 | 137,597 | 147,028 | 141,798
Loans receivable | 10,760 |  | 10,760 |  |  | 14,072 |  |
Gross loans receivable | 1,682,710 |  | 1,682,710 |  |  | 1,328,461 |  |
Consumer and other loans: | CCBX |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Gross loans receivable | 918,779 |  | 918,779 |  |  | 691,708 |  |
Consumer and other loans: | Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | 0 |  | 0 |  |  | 0 |  |
Gross loans receivable | 10,760 |  | 10,760 |  |  | 14,072 |  |
Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Overdrafts included in loans | 19 |  | 19 |  |  | 10 |  |
CCBX |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Proceeds from sales of loans held for sale |  |  | 7,840,000 |  |  |  |  |
Overdrafts included in loans | $ 35,500 |  | $ 35,500 |  |  | 16,800 |  |
Threshold period for past due loans (in days) | 180 days |  | 180 days |  |  |  |  |
Valuation adjustment |  |  | $ 46,000 |  |  |  |  |
Consumer Portfolio Segment | Installment/Closed-End Consumer Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Threshold period for past due loans (in days) | 120 days |  | 120 days |  |  |  |  |
Consumer Portfolio Segment | Revolving/Open-End Consumer Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Threshold period for past due loans (in days) | 180 days |  | 180 days |  |  |  |  |
Commercial and industrial loans | Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | $ 0 |  | $ 0 |  |  | 0 |  |
Gross loans receivable | 237,176 |  | 237,176 |  |  | 224,439 |  |
Construction, land and land development loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing |  |  |  |  |  |  |  |
Allowance for credit losses | 3,990 | 5,265 | 3,990 | 5,265 | 6,101 | 6,580 | 4,531 | 3,439
Gross loans receivable |  |  |  |  |  |  |  |
Construction, land and land development loans | Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | 0 |  | 0 |  |  | 0 |  |
Gross loans receivable | 221,562 |  | 221,562 |  |  | 222,075 |  |
Real Estate Portfolio Segment | Commercial real estate loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Allowance for credit losses | 5,712 | $ 7,300 | 5,712 | $ 7,300 | $ 6,010 | 5,496 | $ 8,110 | $ 8,456
Loans receivable | 1,319,798 |  | 1,319,798 |  |  | 1,285,856 |  |
Real Estate Portfolio Segment | Commercial real estate loans | Community Bank |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
90 Days or More Past Due and Still Accruing | 0 |  | 0 |  |  | 0 |  |
Gross loans receivable | 1,319,798 |  | 1,319,798 |  |  | 1,285,856 |  |
CCBX Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Consumer and other loans | 1,670,000 |  | 1,670,000 |  |  | 1,310,000 |  |
Commercial and industrial loans | 1,400 |  | 1,400 |  |  | 2,300 |  |
Residential real estate loans | 324,900 |  | 324,900 |  |  | 264,100 |  |
CCBX Loans | Commercial and industrial loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Gross loans receivable | 229,500 |  | 229,500 |  |  | 229,600 |  |
CCBX Loans | Consumer Loan |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Purchased loans | 122,800 |  | 122,800 |  |  | 134,900 |  |
Consumer and other loans | 121,400 |  | 121,400 |  |  | 132,600 |  |
Credit cards |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Proceeds from sales of loans held for sale |  |  | 6,310,000 |  |  |  |  |
Capital call lines |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial and industrial loans | 204,800 |  | 204,800 |  |  | 210,500 |  |
Unsecured C C B X Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Commercial and industrial loans | $ 24,600 |  | $ 24,600 |  |  | $ 19,200 |  |

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