v3.26.1
Fair Value Measurements (Details) - EBP 003 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments $ 125,227,487 $ 110,716,210
Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 87,256,435 74,730,877
Origin Bancorp, Inc. (“Company”) stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 37,971,052 35,985,333
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 125,227,487 110,716,210
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 87,256,435 74,730,877
Level 1 | Origin Bancorp, Inc. (“Company”) stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 37,971,052 35,985,333
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Origin Bancorp, Inc. (“Company”) stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Origin Bancorp, Inc. (“Company”) stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments $ 0 $ 0