Debt Instrument, Interest Term

No definition available.

Name:	efsc_DebtInstrumentInterestTerm
Namespace Prefix:	efsc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Short-term and Long-term Debt, Average Outstanding Amount

+ References

No definition available.

+ Details

Name:	efsc_ShortTermAndLongTermDebtAverageOutstandingAmount
Namespace Prefix:	efsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Short-term and Long-term Debt, Maximum Month-end Outstanding Amount

+ References

No definition available.

+ Details

Name:	efsc_ShortTermAndLongTermDebtMaximumMonthEndOutstandingAmount
Namespace Prefix:	efsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

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+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

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Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of FHLB debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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+ Details

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Balance Type:	debit
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- Definition

Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Period Type:	instant

- Details

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- Details

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- Details

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Balance Type:
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- Details

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- Details

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Other Borrowings and Notes Payable (Details) - USD ($)	2 Months Ended			12 Months Ended
Other Borrowings and Notes Payable (Details) - USD ($)	Feb. 28, 2022	Feb. 28, 2019	Feb. 29, 2016	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Securities sold under agreement to repurchase				$ 270,773,000	$ 331,006,000
Other borrowings				324,119,000	353,863,000
Loans Payable				17,143,000	22,857,000
Unsecured Term Loan Agreement ("Term Loan")
Debt Instrument [Line Items]
Term (in years)		5 years
Unsecured term loan, face amount		$ 40,000,000
Unsecured Term Loan Agreement ("Term Loan") \| LIBOR
Debt Instrument [Line Items]
Basis spread		1.25%
Unsecured Term Loan Agreement ("Term Loan") \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread	1.36%
Other Borrowings
Debt Instrument [Line Items]
Average balance during the year				211,039,000	225,895,000
Maximum balance outstanding at any month-end				$ 284,269,000	$ 331,006,000
Average interest rate during the year				0.24%	0.10%
Average interest rate at December 31				1.44%	0.06%
Other Borrowings \| New Market Tax Credit Investments
Debt Instrument [Line Items]
Other borrowings				$ 36,200,000
Interest rate				1.00%
Term of interest (in years)				7 years
Other Borrowings \| New Market Tax Credit Investments \| Minimum
Debt Instrument [Line Items]
Term (in years)				26 years
Other Borrowings \| New Market Tax Credit Investments \| Maximum
Debt Instrument [Line Items]
Term (in years)				31 years
Line of Credit
Debt Instrument [Line Items]
Remaining borrowing capacity				$ 1,400,000,000
Aggregate of pledge secured by certain eligible loans				1,600,000,000
Amount withdrawn				0
Line of Credit \| Senior Unsecured Revolving Credit Agreement ("Revolving Agreement") \| Revolving Credit Facility
Debt Instrument [Line Items]
Term (in years)	1 year		1 year
Line of Credit, Current			$ 25,000,000
Line of Credit \| Senior Unsecured Revolving Credit Agreement ("Revolving Agreement") \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread			1.25%
Line of Credit \| Senior Unsecured Revolving Credit Agreement ("Revolving Agreement") \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread	1.36%
Unsecured Term Loan
Debt Instrument [Line Items]
Average balance during the year				20,681,000	$ 26,427,000
Maximum balance outstanding at any month-end				$ 22,857,000	$ 28,571,000
Average interest rate during the year				2.94%	1.40%
Average interest rate at December 31				5.48%	1.38%