v3.26.1
Fair Value Measurements (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value $ 219,738,761 $ 187,164,065
Market price (in dollars per share) $ 54.00  
Investment, Identifier [Axis]: Galliard Stable Return Fund C    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value $ 8,124,368 7,474,827
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2010 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 821,995 744,407
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2015 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 207,513 332,353
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2020 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 5,495,293 5,573,152
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2025 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 7,358,383 7,203,557
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2030 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 16,647,398 13,441,424
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2035 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 10,101,808 8,704,980
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2040 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 19,172,969 17,354,800
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2045 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 11,328,092 8,735,431
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2050 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 13,559,421 10,024,765
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2055 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 4,650,727 3,466,960
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2060 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 3,788,492 2,528,333
Investment, Identifier [Axis]: Schwab Indexed Retirement Trust 2065 Fund Class I    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 791,295 249,933
Investment, Identifier [Axis]: State Street S&P 500 Index Non-Lending Series Fund Class N    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 32,069,223 25,637,478
Investment, Identifier [Axis]: State Street U.S. Inflation Protected Bond Index Securities Lending Series Fund Class II    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 1,061,606 711,761
Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 75,947,218 66,005,355
EFSC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 8,543,230 0
Interest-bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 69,730 0
EFSC common stock fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 8,974,549
Collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 135,178,583 112,184,161
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 84,560,178 74,979,904
Total | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 75,947,218 66,005,355
Total | EFSC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 8,543,230  
Total | Interest-bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 69,730  
Total | EFSC common stock fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value   8,974,549
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 84,560,178 66,005,355
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 75,947,218 66,005,355
Level 1 | EFSC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 8,543,230  
Level 1 | Interest-bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 69,730  
Level 1 | EFSC common stock fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value   0
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 8,974,549
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Level 2 | EFSC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0  
Level 2 | Interest-bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0  
Level 2 | EFSC common stock fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value   8,974,549
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0 0
Level 3 | EFSC common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value 0  
Level 3 | Interest-bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value $ 0  
Level 3 | EFSC common stock fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments, at fair value   $ 0