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Capital and Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
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Origin Bancorp, Inc. |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,034,347 | $ 1,012,916
Actual, ratio | 0.1197 | 0.1183
Minimum capital required, amount | $ 604,669 | $ 599,455
Minimum capital required, ratio | 0.0700 | 0.0700
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,050,183 | $ 1,028,729
Actual, ratio | 0.1215 | 0.1201
Minimum capital required, amount | $ 734,696 | $ 727,907
Minimum capital required, ratio | 0.0850 | 0.0850
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,294,542 | $ 1,286,604
Actual, ratio | 0.1498 | 0.1502
Minimum capital required, amount | $ 907,389 | $ 899,184
Minimum capital required, ratio | 0.1050 | 0.1050
Leverage Ratio |  |
Actual, amount | $ 1,050,183 | $ 1,028,729
Actual, ratio | 0.1066 | 0.1050
Minimum capital required, amount | $ 393,987 | $ 391,822
Minimum capital required, ratio | 0.0400 | 0.0400
Origin Bank | Origin Bank |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,040,139 | $ 1,019,732
Actual, ratio | 0.1208 | 0.1195
Minimum capital required, amount | $ 602,730 | $ 597,548
Minimum capital required, ratio | 0.0700 | 0.0700
Well capitalized, amount | $ 559,677 | $ 554,866
Well capitalized, ratio | 6.50% | 6.50%
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,040,139 | $ 1,019,732
Actual, ratio | 0.1208 | 0.1195
Minimum capital required, amount | $ 731,886 | $ 725,593
Minimum capital required, ratio | 0.0850 | 0.0850
To be well capitalized under prompt corrective action provisions, amount | $ 688,834 | $ 682,912
To be well capitalized under prompt corrective action provisions, ratio | 0.0800 | 0.0800
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 1,209,498 | $ 1,188,000
Actual, ratio | 0.1405 | 0.1392
Minimum capital required, amount | $ 903,968 | $ 896,320
Minimum capital required, ratio | 0.1050 | 0.1050
To be well capitalized under prompt corrective action provisions, amount | $ 860,922 | $ 853,638
To be well capitalized under prompt corrective action provisions, ratio | 0.1000 | 0.1000
Leverage Ratio |  |
Actual, amount | $ 1,040,139 | $ 1,019,732
Actual, ratio | 0.1060 | 0.1045
Minimum capital required, amount | $ 392,550 | $ 390,246
Minimum capital required, ratio | 0.0400 | 0.0400
To be well capitalized under prompt corrective action provisions, amount | $ 490,687 | $ 487,807
To be well capitalized under prompt corrective action provisions, ratio | 0.0500 | 0.0500

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