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Regulatory Matters: Schedule of Compliance with Regulatory Capital Requirements for Mortgage Companies (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
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Timberland Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Leverage Capital, Actual Amount | $ 168,937 | $ 152,926
Tier 1 Leverage Capital, Actual Ratio | 11.10% | 12.50%
Tier 1 Leverage Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 60,993 | $ 49,044
Tier 1 Leverage Capital, Regulatory Minimum To Be Adequately Capitalized, Ratio | 4.00% | 4.00%
Tier 1 Leverage Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 76,241 | $ 61,305
Tier 1 Leverage Capital, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.00% | 5.00%
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Amount | $ 168,937 | $ 152,926
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Ratio | 19.70% | 18.10%
Tier 1 Risk-based Capital Ratio, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 38,504 | $ 38,019
Tier 1 Risk-based Capital Ratio, Regulatory Minimum To Be Adequately Capitalized, Ratio | 4.50% | 4.50%
Tier 1 Risk-based Capital Ratio, Regulatory Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 55,618 | $ 54,916
Tier 1 Risk-based Capital Ratio, Regulatory Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.50% | 6.50%
Tier 1 Risk-based Capital, Actual Amount | $ 168,937 | $ 152,926
Tier 1 Risk-based Capital, Actual Ratio | 19.70% | 18.10%
Tier 1 Risk-based Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 51,339 | $ 50,692
Tier 1 Risk-based Capital, Regulatory Minimum To Be Adequately Capitalized, Ratio | 6.00% | 6.00%
Tier 1 Risk-based Capital, Regulatory Minimum To Be Well Capitalized, Amount | $ 68,452 | $ 67,589
Tier 1 Risk-based Capital, Regulatory Minimum To Be Well Capitalized, Ratio | 8.00% | 8.00%
Total Capital, Actual Amount | $ 179,671 | $ 162,857
Total Capital, Actual Ratio | 21.00% | 19.30%
Total Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 68,452 | $ 67,589
Total Capital, Regulatory Minimum To Be Adequately Capitalized, Ratio | 8.00% | 8.00%
Total Capital, Regulatory Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 85,566 | $ 84,487
Total Capital, Regulatory Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.00% | 10.00%
Timberland Bancorp |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Leverage Capital, Actual Amount | $ 172,000 | $ 155,468
Tier 1 Leverage Capital, Actual Ratio | 11.30% | 12.70%
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Amount | $ 172,000 | $ 155,468
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Ratio | 20.10% | 18.40%
Tier 1 Risk-based Capital, Actual Amount | $ 172,000 | $ 155,468
Tier 1 Risk-based Capital, Actual Ratio | 20.10% | 18.40%
Total Capital, Actual Amount | $ 182,805 | $ 165,399
Total Capital, Actual Ratio | 21.30% | 19.60%

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