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v3.19.3.a.u2

Investment Securities: Schedule of significant inputs utilized to measure management's estimate of the credit loss component on OTTI securities (Details) | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
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Minimum |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
OTTI significant inputs - Constant prepayment rate | 6.00% | 6.00% | 6.00%
OTTI significant inputs - Collateral default rate | 3.00% | 0.00% | 0.03%
OTTI significant inputs - Loss severity rate | 0.00% | 0.00% | 1.00%
Maximum |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
OTTI significant inputs - Constant prepayment rate | 15.00% | 15.00% | 15.00%
OTTI significant inputs - Collateral default rate | 19.70% | 10.42% | 10.75%
OTTI significant inputs - Loss severity rate | 10.59% | 75.00% | 62.00%
Weighted Average |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |
OTTI significant inputs - Constant prepayment rate | 10.67% | 12.91% | 10.40%
OTTI significant inputs - Collateral default rate | 10.40% | 5.03% | 4.84%
OTTI significant inputs - Loss severity rate | 4.07% | 37.25% | 41.75%

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Namespace Prefix: | tsbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Namespace Prefix: | tsbk_
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Balance Type: | na
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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Balance Type: | na
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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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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |