XML 16 R108.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Commitments and Contingencies: Supply Commitment (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Commitments and Contingencies Disclosure [Abstract] |  |
Undisbursed portion of construction loans in process | $ 92,226 | $ 83,237
Undisbursed lines of credit | 80,184 | 49,525
Commitments to extend credit | $ 16,578 | $ 17,665

X
- References No definition available. + Details
Name: | tsbk_CommitmentsToExtendCredit
Namespace Prefix: | tsbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | tsbk_UndisbursedLinesOfCredit
Namespace Prefix: | tsbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | tsbk_UndisbursedPortionOfConstructionLoansInProcess
Namespace Prefix: | tsbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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