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v3.24.3

OREO and Other Repossessed Assets: Narrative (Details) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 USD ($) loan property | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($)
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract] |  |  |
(Gain) loss on sales of OREO and other repossessed assets, net | $ | $ 0 | $ 0 | $ 2
OREO, number of repossessed assets | loan | 0 |  |
Number of other repossessed assets | property | 0 |  |

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- Definition Other Real Estate Owned, Repossessed Assets + References No definition available. + Details
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Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Other Repossessed Assets, Number + References No definition available. + Details
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Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration