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Regulatory Matters (Details) | Dec. 31, 2022 | Dec. 31, 2021
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Enterprise Financial Services Corp [Member] |  |
Regulatory Assets [Line Items] |  |
Tier One Common Equity Capital to Risk Weighted Assets | 11.10% | 11.30%
Actual, Ratio | 0.126 | 0.130
Actual, Ratio | 0.142 | 0.147
Actual, Ratio | 0.109 | 0.097
Enterprise Bank and Trust [Member] |  |
Regulatory Assets [Line Items] |  |
Tier One Common Equity Capital to Risk Weighted Assets | 12.10% | 12.50%
Tier One Common Equity Capital Required to be Well Capitalized to Risk Weighted Assets | 6.50% |
Tier One Common Equity Capital CCB Minimum | 7.00% |
Actual, Ratio | 0.121 | 0.125
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.080 |
Tier One Risk Based Capital CCB Minimum | 8.50% |
Actual, Ratio | 0.131 | 0.135
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.100 |
Capital to Risk Weighted Assets CCB Minimum | 10.50% |
Actual, Ratio | 0.105 | 0.093
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.050 |
Tier One Leverage Capital to Average Assets CCB Minimum | 4.00% |

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