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Capital and Regulatory Matters (Tables)
 9 Months Ended
Sep. 30, 2025
Banking Regulation [Abstract]  
Schedule of Actual Capital Amounts and Ratios
The actual capital amounts and ratios of the Company and the Bank at September 30, 2025, and December 31, 2024, are presented in the following table:
(Dollars in thousands)

September 30, 2025
ActualMinimum Capital Required - Basel IIITo be Well Capitalized Under Prompt Corrective Action Provisions
Common Equity Tier 1 Capital to Risk-Weighted AssetsAmountRatioAmountRatioAmountRatio
Origin Bancorp, Inc.
$1,113,214 13.59 %$573,421 7.00 %N/AN/A
Origin Bank
1,050,761 12.93 568,888 7.00 $528,253 6.50 %
Tier 1 Capital to Risk-Weighted Assets
Origin Bancorp, Inc.
1,129,191 13.79 696,192 8.50 N/AN/A
Origin Bank1,050,761 12.93 690,793 8.50 650,158 8.00 
Total Capital to Risk-Weighted Assets
Origin Bancorp, Inc.
1,302,509 15.90 860,131 10.50 N/AN/A
Origin Bank1,150,884 14.16 853,331 10.50 812,697 10.00 
Leverage Ratio
Origin Bancorp, Inc.
1,129,191 11.69 386,283 4.00 N/AN/A
Origin Bank1,050,761 10.97 383,154 4.00 478,942 5.00 
December 31, 2024
Common Equity Tier 1 Capital to Risk-Weighted Assets
Origin Bancorp, Inc.
1,085,860 13.32 570,647 7.00 N/AN/A
Origin Bank
1,075,768 13.29 566,620 7.00 526,147 6.50 
Tier 1 Capital to Risk-Weighted Assets
Origin Bancorp, Inc.
1,101,766 13.52 692,929 8.50 N/AN/A
Origin Bank1,075,768 13.29 688,038 8.50 647,565 8.00 
Total Capital to Risk-Weighted Assets
Origin Bancorp, Inc.
1,339,735 16.44 855,670 10.50 N/AN/A
Origin Bank1,239,644 15.31 850,353 10.50 809,860 10.00 
Leverage Ratio
Origin Bancorp, Inc.
1,101,766 11.08 397,635 4.00 N/AN/A
Origin Bank1,075,768 10.89 395,154 4.00 493,943 5.00