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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract] |  |
Reserve for unfunded loan commitments | $ 165 | $ 148
Employee severance compensation plan, employee minimum service requirement | 2 years |
Employee severance compensation plan, eligible payment, maximum compensation term | 24 months |

X
- Definition Employee Severance Compensation Plan, Eligible Payment, Maximum Compensation Term + References No definition available. + Details
Name: | tsbk_EmployeeSeveranceCompensationPlanEligiblePaymentMaximumCompensationTerm
Namespace Prefix: | tsbk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employee Severance Compensation Plan, Employee Service Requirement + References No definition available. + Details
Name: | tsbk_EmployeeSeveranceCompensationPlanEmployeeServiceRequirement
Namespace Prefix: | tsbk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | tsbk_ReserveForUnfundedLoanCommitments
Namespace Prefix: | tsbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration