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Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Total capital Member | Great Southern Bancorp, Inc. Member |  |
Actual Capital Amount | $ 800,388 | $ 698,085
Actual Capital Ratio | 17.20% | 15.00%
Capital Required for Capital Adequacy | $ 373,132 | $ 372,387
Capital Required for Capital Adequacy to Risk Weighted Assets | 8.0 | 8.0
Total capital Member | Great Southern Bank Member |  |
Actual Capital Amount | $ 694,047 | $ 650,280
Actual Capital Ratio | 14.90% | 14.00%
Capital Required for Capital Adequacy | $ 373,058 | $ 372,316
Capital Required for Capital Adequacy to Risk Weighted Assets | 8.0 | 8.0
Capital Required to be Well Capitalized | $ 466,322 | $ 465,395
Capital Required to be Well Capitalized to Risk Weighted Assets | 10.0 | 10.0
Tier I capital Member | Great Southern Bancorp, Inc. Member |  |
Actual Capital Amount | $ 594,645 | $ 582,791
Actual Capital Ratio | 12.70% | 12.50%
Capital Required for Capital Adequacy | $ 279,849 | $ 279,290
Capital Required for Capital Adequacy to Risk Weighted Assets | 6.0 | 6.0
Tier I capital Member | Great Southern Bank Member |  |
Actual Capital Amount | $ 638,304 | $ 609,986
Actual Capital Ratio | 13.70% | 13.10%
Capital Required for Capital Adequacy | $ 279,793 | $ 279,237
Capital Required for Capital Adequacy to Risk Weighted Assets | 6.0 | 6.0
Capital Required to be Well Capitalized | $ 373,058 | $ 372,316
Capital Required to be Well Capitalized to Risk Weighted Assets | 8.0 | 8.0
Tier I leverage capital Member | Great Southern Bancorp, Inc. Member |  |
Actual Capital Amount | $ 594,645 | $ 582,791
Actual Capital Ratio | 10.90% | 11.80%
Capital Required for Capital Adequacy | $ 217,223 | $ 198,320
Capital Required for Capital Adequacy to Risk Weighted Assets | 4.0 | 4.0
Tier I leverage capital Member | Great Southern Bank Member |  |
Actual Capital Amount | $ 638,304 | $ 609,986
Actual Capital Ratio | 11.80% | 12.30%
Capital Required for Capital Adequacy | $ 217,170 | $ 198,010
Capital Required for Capital Adequacy to Risk Weighted Assets | 4.0 | 4.0
Capital Required to be Well Capitalized | $ 271,463 | $ 247,512
Capital Required to be Well Capitalized to Risk Weighted Assets | 5.0 | 5.0
Common equity Tier I capital Member | Great Southern Bancorp, Inc. Member |  |
Actual Capital Amount | $ 569,645 | $ 557,791
Actual Capital Ratio | 12.20% | 12.00%
Capital Required for Capital Adequacy | $ 209,887 | $ 209,468
Capital Required for Capital Adequacy to Risk Weighted Assets | 4.5 | 4.5
Common equity Tier I capital Member | Great Southern Bank Member |  |
Actual Capital Amount | $ 638,304 | $ 609,986
Actual Capital Ratio | 13.70% | 13.10%
Capital Required for Capital Adequacy | $ 209,845 | $ 209,428
Capital Required for Capital Adequacy to Risk Weighted Assets | 4.5 | 4.5
Capital Required to be Well Capitalized | $ 303,109 | $ 302,507
Capital Required to be Well Capitalized to Risk Weighted Assets | 6.5 | 6.5

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