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Regulatory Capital (Details) | Dec. 31, 2023 | Dec. 31, 2022
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Enterprise Financial Services Corp [Member] |  |
Regulatory Assets [Line Items] |  |
Tier One Common Equity Capital to Risk Weighted Assets | 11.30% | 11.10%
Actual, Ratio | 0.127 | 0.126
Actual, Ratio | 0.142 | 0.142
Actual, Ratio | 0.110 | 0.109
Enterprise Bank and Trust [Member] |  |
Regulatory Assets [Line Items] |  |
Tier One Common Equity Capital to Risk Weighted Assets | 12.20% | 12.10%
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 | 0.122 | 0.121
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.080 |
Tier One Risk Based Capital CCB Minimum | 8.50% |
Actual, Ratio | 0.132 | 0.131
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.100 |
Capital to Risk Weighted Assets CCB Minimum | 10.50% |
Actual, Ratio | 0.106 | 0.105
To Be Well Capitalized Under Applicable Action Provisions, Ratio | 0.050 |

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- Definition Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 + Details
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