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Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Great Southern Bancorp, Inc. |  |
Total capital |  |
Actual capital, Amount | $ 809,221 | $ 770,885
Actual capital, Ratio | 0.154 | 0.152
For Capital Adequacy Purposes, Amount | $ 419,108 | $ 406,994
For Capital Adequacy Purposes, Ratio | 0.08 | 0.08
Tier I capital |  |
Actual capital, Amount | $ 668,639 | $ 632,279
Actual capital, Ratio | 0.128 | 0.124
For Capital Adequacy Purposes, Amount | $ 314,331 | $ 305,246
For Capital Adequacy Purposes, Ratio | 0.06 | 0.06
Tier I leverage capital |  |
Actual capital, Amount | $ 668,639 | $ 632,279
Actual capital, Ratio | 0.112 | 0.11
For Capital Adequacy Purposes, Amount | $ 239,536 | $ 229,992
For Capital Adequacy Purposes, Ratio | 0.04 | 0.04
Common equity Tier I capital |  |
Actual capital, Amount | $ 643,639 | $ 607,279
Actual capital, Ratio | 0.123 | 0.119
For Capital Adequacy Purposes, Amount | $ 235,748 | $ 228,934
For Capital Adequacy Purposes, Ratio | 0.045 | 0.045
Great Southern Bank |  |
Total capital |  |
Actual capital, Amount | $ 725,974 | $ 728,113
Actual capital, Ratio | 0.139 | 0.143
For Capital Adequacy Purposes, Amount | $ 418,985 | $ 406,744
For Capital Adequacy Purposes, Ratio | 0.08 | 0.08
To Be Well capitalized Under Prompt Corrective Action Provisions, Amount | $ 523,732 | $ 508,430
To Be Well capitalized Under Prompt Corrective Action Provisions, Ratio | 0.10 | 0.10
Tier I capital |  |
Actual capital, Amount | $ 660,411 | $ 664,545
Actual capital, Ratio | 0.126 | 0.131
For Capital Adequacy Purposes, Amount | $ 314,239 | $ 305,058
For Capital Adequacy Purposes, Ratio | 0.06 | 0.06
To Be Well capitalized Under Prompt Corrective Action Provisions, Amount | $ 418,985 | $ 406,744
To Be Well capitalized Under Prompt Corrective Action Provisions, Ratio | 0.08 | 0.08
Tier I leverage capital |  |
Actual capital, Amount | $ 660,411 | $ 664,545
Actual capital, Ratio | 0.11 | 0.116
For Capital Adequacy Purposes, Amount | $ 239,487 | $ 229,692
For Capital Adequacy Purposes, Ratio | 0.04 | 0.04
To Be Well capitalized Under Prompt Corrective Action Provisions, Amount | $ 299,359 | $ 287,115
To Be Well capitalized Under Prompt Corrective Action Provisions, Ratio | 0.05 | 0.05
Common equity Tier I capital |  |
Actual capital, Amount | $ 660,411 | $ 664,545
Actual capital, Ratio | 0.126 | 0.131
For Capital Adequacy Purposes, Amount | $ 235,679 | $ 228,794
For Capital Adequacy Purposes, Ratio | 0.045 | 0.045
To Be Well capitalized Under Prompt Corrective Action Provisions, Amount | $ 340,426 | $ 330,480
To Be Well capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065 | 0.065

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