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Commitments and Contingencies: Supply Commitment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Undisbursed portion of construction loans in process	$ 53,457	$ 29,416
Undisbursed lines of credit	41,494	30,678
Commitments to extend credit	$ 12,196	$ 18,119

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