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Parent Company Only Condensed Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Total assets | $ 14,518,590 | $ 13,054,172 |  |
Subordinated debentures and notes | 155,984 | 155,433 |  |
Shareholders' equity | 1,716,068 | 1,522,263 | $ 1,529,116 | $ 1,078,975
Total liabilities and shareholders' equity | 14,518,590 | 13,054,172 |  |
Parent [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Cash | 100,418 | 99,018 | $ 94,760 | $ 75,475
Other assets | 27,701 | 30,312 |  |
Total assets | 1,887,646 | 1,699,463 |  |
Subordinated debentures and notes | 155,984 | 155,433 |  |
Notes payable | 11,429 | 17,143 |  |
Accounts payable and other liabilities | 4,165 | 4,624 |  |
Shareholders' equity | 1,716,068 | 1,522,263 |  |
Total liabilities and shareholders' equity | 1,887,646 | 1,699,463 |  |
Enterprise Bank and Trust [Member] | Parent [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Investments | 1,748,260 | 1,553,657 |  |
Nonbank Subsidiaries [Member] | Parent [Member] |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Investments | $ 11,267 | $ 16,476 |  |

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