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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2020
Regulatory Matters |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  |  |  |  | ​ |  |  |  | To Be Well |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Capitalized Under |
​ | ​ | ​ | ​ | ​ | ​ | ​ | For Capital | ​ | Prompt Corrective |
​ | ​ | Actual | ​ | Adequacy Purposes | ​ | Action Provisions |
​ |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio |
​ | ​ | (Dollars In Thousands) |
As of December 31, 2020 |  | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |  |  | ​
Total capital |  | ​ |  |  |  |  | ​ |  |  |  |  | ​ |  |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 800,388 |  | 17.2 | % | $ | 373,132 |  | 8.0 | % | ​ | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 694,047 |  | 14.9 | % | $ | 373,058 |  | 8.0 | % | $ | 466,322 |  | 10.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 594,645 |  | 12.7 | % | $ | 279,849 |  | 6.0 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 638,304 |  | 13.7 | % | $ | 279,793 |  | 6.0 | % | $ | 373,058 |  | 8.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I leverage capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 594,645 |  | 10.9 | % | $ | 217,223 |  | 4.0 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 638,304 |  | 11.8 | % | $ | 217,170 |  | 4.0 | % | $ | 271,463 |  | 5.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity Tier I capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 569,645 |  | 12.2 | % | $ | 209,887 |  | 4.5 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 638,304 |  | 13.7 | % | $ | 209,845 |  | 4.5 | % | $ | 303,109 |  | 6.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
As of December 31, 2019 | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Total capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 698,085 |  | 15.0 | % | $ | 372,387 |  | 8.0 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 650,280 |  | 14.0 | % | $ | 372,316 |  | 8.0 | % | $ | 465,395 |  | 10.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 582,791 |  | 12.5 | % | $ | 279,290 |  | 6.0 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 609,986 |  | 13.1 | % | $ | 279,237 |  | 6.0 | % | $ | 372,316 |  | 8.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tier I leverage capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 582,791 |  | 11.8 | % | $ | 198,320 |  | 4.0 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 609,986 |  | 12.3 | % | $ | 198,010 |  | 4.0 | % | $ | 247,512 |  | 5.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common equity Tier I capital | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​ |  | ​ |  |  | ​
Great Southern Bancorp, Inc. | ​ | $ | 557,791 |  | 12.0 | % | $ | 209,468 |  | 4.5 | % |  | N/A |  | N/A | ​
Great Southern Bank | ​ | $ | 609,986 |  | 13.1 | % | $ | 209,428 |  | 4.5 | % | $ | 302,507 |  | 6.5 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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