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Capital and Regulatory Matters - Actual Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Origin Bancorp, Inc. |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 681,039 | $ 604,306
Actual, ratio | 0.1120 | 0.0995
Minimum capital required, amount | $ 425,475 | $ 425,012
Minimum capital required, ratio | 7.00% | 7.00%
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 690,448 | $ 613,682
Actual, ratio | 0.1136 | 0.1011
Minimum capital required, amount | $ 516,648 | $ 516,107
Minimum capital required, ratio | 0.0850 | 0.0850
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 897,503 | $ 837,058
Actual, ratio | 0.1477 | 0.1379
Minimum capital required, amount | $ 638,212 | $ 637,539
Minimum capital required, ratio | 0.1050 | 0.1050
Leverage Ratio |  |
Actual, amount | $ 690,448 | $ 613,682
Actual, ratio | 0.0920 | 0.0862
Minimum capital required, amount | $ 300,195 | $ 284,771
Minimum capital required, ratio | 0.0400 | 0.0400
Origin Bank | Origin Bank |  |
Common Equity Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 724,440 | $ 637,863
Actual, ratio | 0.1197 | 0.1053
Minimum capital required, amount | $ 423,819 | $ 424,010
Minimum capital required, ratio | 7.00% | 7.00%
Well capitalized, amount | $ 393,546 | $ 393,724
Well capitalized, ratio | 6.50% | 6.50%
Tier 1 Capital to Risk-Weighted Assets |  |
Actual, amount | $ 724,440 | $ 637,863
Actual, ratio | 0.1197 | 0.1053
Minimum capital required, amount | $ 514,637 | $ 514,870
Minimum capital required, ratio | 0.0850 | 0.0850
Well capitalized, amount | $ 484,365 | $ 484,583
Well capitalized, ratio | 0.0800 | 0.0800
Total Capital to Risk-Weighted Assets |  |
Actual, amount | $ 852,825 | $ 782,503
Actual, ratio | 0.1409 | 0.1292
Minimum capital required, amount | $ 635,727 | $ 636,019
Minimum capital required, ratio | 0.1050 | 0.1050
Well capitalized, amount | $ 605,454 | $ 605,732
Well capitalized, ratio | 0.1000 | 0.1000
Leverage Ratio |  |
Actual, amount | $ 724,440 | $ 637,863
Actual, ratio | 0.0966 | 0.0899
Minimum capital required, amount | $ 299,932 | $ 283,842
Minimum capital required, ratio | 0.0400 | 0.0400
Well capitalized, amount | $ 374,915 | $ 354,802
Well capitalized, ratio | 0.0500 | 0.0500

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