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Capital and Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Origin Bancorp, Inc. |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,012,916 | $ 906,859
Actual, ratio | 0.1183 | 0.1093
Minimum capital required, amount | $ 599,455 | $ 580,857
Minimum capital required, ratio | 0.0700 | 0.0700
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,028,729 | $ 922,584
Actual, ratio | 0.1201 | 0.1112
Minimum capital required, amount | $ 727,907 | $ 705,327
Minimum capital required, ratio | 0.0850 | 0.0850
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,286,604 | $ 1,180,665
Actual, ratio | 0.1502 | 0.1423
Minimum capital required, amount | $ 899,184 | $ 871,290
Minimum capital required, ratio | 0.1050 | 0.1050
Leverage Ratio |  |
Actual, amount | $ 1,028,729 | $ 922,584
Actual, ratio | 0.1050 | 0.0966
Minimum capital required, amount | $ 391,822 | $ 381,955
Minimum capital required, ratio | 0.0400 | 0.0400
Origin Bank | Origin Bank |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,019,732 | $ 952,579
Actual, ratio | 0.1195 | 0.1150
Minimum capital required, amount | $ 597,548 | $ 579,775
Minimum capital required, ratio | 0.0700 | 0.0700
Well capitalized, amount | $ 554,866 | $ 538,363
Well capitalized, ratio | 6.50% | 6.50%
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,019,732 | $ 952,579
Actual, ratio | 0.1195 | 0.1150
Minimum capital required, amount | $ 725,593 | $ 704,013
Minimum capital required, ratio | 0.0850 | 0.0850
To be well capitalized under prompt corrective action provisions, amount | $ 682,912 | $ 662,600
To be well capitalized under prompt corrective action provisions, ratio | 0.0800 | 0.0800
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,188,000 | $ 1,109,257
Actual, ratio | 0.1392 | 0.1339
Minimum capital required, amount | $ 896,320 | $ 869,661
Minimum capital required, ratio | 0.1050 | 0.1050
To be well capitalized under prompt corrective action provisions, amount | $ 853,638 | $ 828,249
To be well capitalized under prompt corrective action provisions, ratio | 0.1000 | 0.1000
Leverage Ratio |  |
Actual, amount | $ 1,019,732 | $ 952,579
Actual, ratio | 0.1045 | 0.0994
Minimum capital required, amount | $ 390,246 | $ 383,359
Minimum capital required, ratio | 0.0400 | 0.0400
To be well capitalized under prompt corrective action provisions, amount | $ 487,807 | $ 479,198
To be well capitalized under prompt corrective action provisions, ratio | 0.0500 | 0.0500

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