v3.26.1
Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 001 - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Schedule of Asset Held for Investment [Line Items]    
Entity tax identification number 43-1706259  
Plan number 001  
Total investments, at fair value $ 219,738,761 $ 187,164,065
Current Value $ 222,387,761  
Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Interest rate 4.25%  
Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
Interest rate 9.50%  
Mutual funds    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value $ 75,947,218 66,005,355
Current Value 75,947,218  
Collective trust funds    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 135,178,583 112,184,161
Current Value 135,178,583  
EFSC common stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 8,543,230  
Participant loans    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 2,649,000  
Interest-bearing cash    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 69,730 0
Investment, Identifier [Axis]: AMG River Road Small Cap Value Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 7,916,540  
Investment, Identifier [Axis]: Baird Aggregate Bond Fund Class Institutional    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 6,101,854  
Investment, Identifier [Axis]: CRM Mid Cap Value Fund Class Institutional    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 4,863,593  
Investment, Identifier [Axis]: Conestoga Small Cap Fund Class Investor    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 150,571  
Investment, Identifier [Axis]: Dodge & Cox Stock Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 14,730,604  
Investment, Identifier [Axis]: Galliard Stable Return Fund C    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 8,124,368 7,474,827
Investment, Identifier [Axis]: Galliard Stable Value Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 8,124,368  
Investment, Identifier [Axis]: Goldman Sachs GQG Partners International Opportunities Fund Class Institutional    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 7,820,822  
Investment, Identifier [Axis]: Hartford Schroders International Multi-Cap Value Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 3,641,689  
Investment, Identifier [Axis]: Nuveen Core Impact Bond Fund Class R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 11  
Investment, Identifier [Axis]: PGIM Jennison Mid-Cap Growth Fund Class R6    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 5,528,394  
Investment, Identifier [Axis]: Polen Growth Fund Class Institutional    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 1,465,862  
Investment, Identifier [Axis]: SSGA S&P 500 Index    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 32,069,223  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2010 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 821,995 744,407
Current Value 821,995  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2015 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 207,513 332,353
Current Value 207,513  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2020 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 5,495,293 5,573,152
Current Value 5,495,293  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2025 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 7,358,383 7,203,557
Current Value 7,358,383  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2030 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 16,647,398 13,441,424
Current Value 16,647,398  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2035 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 10,101,808 8,704,980
Current Value 10,101,808  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2040 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 19,172,969 17,354,800
Current Value 19,172,969  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2045 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 11,328,092 8,735,431
Current Value 11,328,092  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2050 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 13,559,421 10,024,765
Current Value 13,559,421  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2055 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 4,650,727 3,466,960
Current Value 4,650,727  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2060 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 3,788,492 2,528,333
Current Value 3,788,492  
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2065 Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 791,295 249,933
Current Value 791,295  
Investment, Identifier [Axis]: State Street Aggregate Bond Index Fund Class K    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 1,110,386  
Investment, Identifier [Axis]: State Street Global All Cap Equity ex-U.S. Index Fund Class K    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 4,171,500  
Investment, Identifier [Axis]: State Street S&P 500 Index Non-Lending Series Fund Class N    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 32,069,223 25,637,478
Investment, Identifier [Axis]: State Street Small/Mid Cap Equity Index Fund Class K    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 3,981,585  
Investment, Identifier [Axis]: State Street U.S. Inflation Protected Bond Index Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 1,061,606  
Investment, Identifier [Axis]: State Street U.S. Inflation Protected Bond Index Securities Lending Series Fund Class II    
EBP, Schedule of Asset Held for Investment [Line Items]    
Total investments, at fair value 1,061,606 $ 711,761
Investment, Identifier [Axis]: Vanguard LifeStrategy Conservative Growth Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 929,696  
Investment, Identifier [Axis]: Vanguard LifeStrategy Growth Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 5,114,580  
Investment, Identifier [Axis]: Vanguard LifeStrategy Income Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value 1,394,499  
Investment, Identifier [Axis]: Vanguard LifeStrategy Moderate Growth Fund Class I    
EBP, Schedule of Asset Held for Investment [Line Items]    
Current Value $ 7,025,032