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Acquisition and Divestiture Activity - Total Consideration (Details) - USD ($) $ / shares in Units, shares in Thousands | Apr. 01, 2024 | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | ---
Assets |  |  |  |  |
Goodwill |  | $ 2,175,251,000 | $ 2,175,251,000 | $ 1,998,716,000 | $ 1,998,716,000
Common Stock |  |  |  |  |
Fair value of consideration |  |  |  |  |
Issuance of common stock (in shares) | $ 24,014,000 |  |  |  |
Share price (in dollars per share) | $ 17.41 |  |  |  |
CapStar Financial Holdings, Inc. |  |  |  |  |
Assets |  |  |  |  |
Cash and cash equivalents | $ 177,791,000 |  |  |  |
Investment securities | 342,490,000 |  |  |  |
FHLB/Federal Reserve Bank stock | 14,426,000 |  |  |  |
Loans held-for-sale | 21,159,000 |  |  |  |
Loans, net of allowance for credit losses | 2,120,627,000 |  |  |  |
Premises and equipment | 22,481,000 |  |  |  |
Goodwill | 176,535,000 |  |  |  |
Other intangible assets | 46,125,000 |  |  |  |
Company-owned life insurance | 91,475,000 |  |  |  |
Other assets | 95,922,000 |  |  |  |
Total assets | 3,109,031,000 |  |  |  |
Liabilities |  |  |  |  |
Deposits | 2,560,124,000 |  |  |  |
Federal Home Loan Bank advances | 75,000,000 |  |  |  |
Other borrowings | 30,000,000 |  |  |  |
Accrued expenses and other liabilities | 26,309,000 |  |  |  |
Total liabilities | 2,691,433,000 |  |  |  |
Fair value of consideration |  |  |  |  |
Total consideration | $ 417,598,000 |  |  |  |
CapStar Financial Holdings, Inc. | Common Stock |  |  |  |  |
Fair value of consideration |  |  |  |  |
Issuance of common stock shares for acquisitions of business (in shares) | 417,598 |  |  |  |

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