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Summary of Significant Accounting Policies: FHLB Stock (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
FHLB, stock impairment charges | $ 0 | $ 0
Minimum |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
FHLB, investment in capital stock, home loans (percent) | 0.12% |
FHLB, investment in capital stock, advances (percent) | 4.00% |

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- Definition Federal Home Loan Bank, Investment in Capital Stock, Advances, Percentage + References No definition available. + Details
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- Definition Federal Home Loan Bank, Investment in Capital Stock, Home Loans, Percentage + References No definition available. + Details
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Namespace Prefix: | tsbk_
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- Definition Federal Home Loan Bank Stock, Impairment + References No definition available. + Details
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Balance Type: | credit
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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