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Regulatory Matters: Schedule of Compliance with Regulatory Capital Requirements for Mortgage Companies (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
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Timberland Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Tier 1 Leverage Capital, Actual Amount | $ 152,926 | $ 117,336
Tier 1 Leverage Capital, Actual Ratio | 12.50% | 11.70%
Tier 1 Leverage Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 49,044 | $ 40,024
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 | $ 61,305 | $ 50,031
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 | $ 152,926 | $ 117,336
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Ratio | 18.10% | 16.70%
Tier 1 Risk-based Capital Ratio, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 38,019 | $ 31,539
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 | $ 54,916 | $ 45,557
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 | $ 152,926 | $ 117,336
Tier 1 Risk-based Capital, Actual Ratio | 18.10% | 16.70%
Tier 1 Risk-based Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 50,692 | $ 42,052
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 | $ 67,589 | $ 56,070
Tier 1 Risk-based Capital, Regulatory Minimum To Be Well Capitalized, Ratio | 8.00% | 8.00%
Total Capital, Actual Amount | $ 162,857 | $ 126,109
Total Capital, Actual Ratio | 19.30% | 18.00%
Total Capital, Regulatory Minimum To Be Adequately Capitalized, Amount | $ 67,589 | $ 56,070
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 | $ 84,487 | $ 70,087
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 | $ 155,468 | $ 120,175
Tier 1 Leverage Capital, Actual Ratio | 12.70% | 12.00%
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Amount | $ 155,468 | $ 120,175
Tier 1 Risk-based Capital Ratio, Common Equity, Actual Ratio | 18.40% | 17.10%
Tier 1 Risk-based Capital, Actual Amount | $ 155,468 | $ 120,175
Tier 1 Risk-based Capital, Actual Ratio | 18.40% | 17.10%
Total Capital, Actual Amount | $ 165,399 | $ 128,955
Total Capital, Actual Ratio | 19.60% | 18.40%

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