Subordinated Debentures and Notes (Details) $ in Thousands		12 Months Ended
	Nov. 01, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 01, 2016 USD ($)
Subordinated Borrowing [Line Items]
Number of Unconsolidated Statutory Business Trusts		13
Investments trust preferred securities		$ 2,900
Subordinated debentures and notes		$ 155,984	$ 155,433
5.75%
Subordinated Borrowing [Line Items]
Fixed interest rate		5.75%
Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Senior Subordinated Notes				$ 50,000
Redeemed value	$ 50,000
Loss on redemption	$ 700
Trust preferred securities [Member]
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 93,121	92,837
Trust preferred securities [Member] | EFSC Clayco Statutory Trust I
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 3,196	3,196
Maturity Date		Dec. 17, 2033
Initial Call Date (1)		Dec. 17, 2008
Floating interest rate		0.0285
Trust preferred securities [Member] | EFSC Capital Trust II
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 5,155	5,155
Maturity Date		Jun. 17, 2034
Initial Call Date (1)		Jun. 17, 2009
Floating interest rate		0.0265
Trust preferred securities [Member] | EFSC Statutory Trust III
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 11,341	11,341
Maturity Date		Dec. 15, 2034
Initial Call Date (1)		Dec. 15, 2009
Floating interest rate		0.0197
Trust preferred securities [Member] | EFSC Clayco Statutory Trust II
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 4,124	4,124
Maturity Date		Sep. 15, 2035
Initial Call Date (1)		Sep. 15, 2010
Floating interest rate		0.0183
Trust preferred securities [Member] | EFSC Statutory Trust IV
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 10,310	10,310
Maturity Date		Dec. 15, 2035
Initial Call Date (1)		Dec. 15, 2010
Floating interest rate		0.0144
Trust preferred securities [Member] | EFSC Statutory Trust V
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 4,124	4,124
Maturity Date		Sep. 15, 2036
Initial Call Date (1)		Sep. 15, 2011
Floating interest rate		0.0160
Trust preferred securities [Member] | EFSC Capital Trust VI
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 14,433	14,433
Maturity Date		Mar. 30, 2037
Initial Call Date (1)		Mar. 30, 2012
Floating interest rate		0.0160
Trust preferred securities [Member] | EFSC Capital Trust VII
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 4,124	4,124
Maturity Date		Dec. 15, 2037
Initial Call Date (1)		Dec. 15, 2012
Floating interest rate		0.0225
Trust preferred securities [Member] | JEFFCO Stat Trust I [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		10.20%
Subordinated debentures and notes		$ 7,732	7,732
Maturity Date		Feb. 22, 2031
Initial Call Date (1)		Feb. 22, 2011
Trust preferred securities [Member] | JEFFCO Stat Trust II [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		2.75%
Subordinated debentures and notes		$ 4,604	4,550
Maturity Date		Mar. 17, 2034
Initial Call Date (1)		Mar. 17, 2009
Trust preferred securities [Member] | Trinity Capital Trust III [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		2.70%
Subordinated debentures and notes		$ 5,473	5,406
Maturity Date		Sep. 08, 2034
Initial Call Date (1)		Sep. 08, 2009
Trust preferred securities [Member] | Trinity Capital Trust IV [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		6.88%
Subordinated debentures and notes		$ 10,310	10,310
Maturity Date		Nov. 23, 2035
Initial Call Date (1)		Aug. 23, 2010
Trust preferred securities [Member] | Trinity Capital Trust V [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		1.65%
Subordinated debentures and notes		$ 8,195	8,032
Maturity Date		Dec. 15, 2036
Initial Call Date (1)		Sep. 15, 2011
Senior Subordinated Notes [Member]
Subordinated Borrowing [Line Items]
Fixed interest rate		4.75%
Debt issuance costs		$ (387)	(654)
Subordinated notes, net of issuance costs		$ 62,863	62,596
Senior Subordinated Notes [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Subordinated Borrowing [Line Items]
Floating interest rate		0.05660
Senior Subordinated Notes [Member] | 5.75%
Subordinated Borrowing [Line Items]
Subordinated debentures and notes		$ 63,250	$ 63,250
Maturity Date		Jun. 01, 2030
Initial Call Date (1)		Jun. 01, 2025