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v3.25.4

Loans and Allowance for Credit Losses - Additional Information (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
May 01, 2025 USD ($) | Apr. 01, 2024 USD ($) | Dec. 31, 2025 USD ($) segment portfolio | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Loan participations |  |  | $ 3,800,000,000 |  |
Loan participations sold |  |  | 1,900,000,000 |  |
Loan participations retained |  |  | $ 1,900,000,000 |  |
Number of loan portfolios | portfolio |  |  | 4 |  |
Number of loan segments | segment |  |  | 7 |  |
Allowance for credit losses at acquisition |  | $ 26,700,000 |  |  |
Provision for credit losses |  |  | $ 197,721,000 | $ 110,619,000 | $ 58,887,000
Accrued interest receivable on loans |  |  | $ 228,600,000 | 171,600,000 |
Loan placed on nonaccrual when past due, number of days |  |  | 90 days |  |
Financing receivable, modified, subsequent default |  |  | $ 6,500,000 | 8,800,000 |
Unfunded commitments on TDRs |  |  | 0 | 0 |
CapStar Financial Holdings, Inc. |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Allowance for credit losses at acquisition |  |  | 26,725,000 | 26,700,000 |
Provision for credit losses |  |  |  | $ 15,300,000 |
Bremer |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Allowance for credit losses at acquisition | $ 103,500,000 |  | 103,546,000 |  |
Provision for credit losses |  |  | $ 69,100,000 |  |
Commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Percentage of risk-based capital |  |  | 255.00% |  |
Regulatory guideline limit |  |  | 300.00% |  |
Maximum |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |
Aggregate amount of loans to related parties |  |  | 5.00% | 5.00% |

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