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Loans Receivable And Allowance For Loan Losses: Troubled Debt Restructurings on Financing Receivables (Details) (USD $)	Mar. 31, 2015		Sep. 30, 2014
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	$ 10,924,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus		$ 10,909,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Accruing loans which are contractually past due 90 days or more	0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing		812,000us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Total of non-accrual and 90 days past due loans	10,924,000tsbk_TotalOfNonAccrualAnd90DaysPastDueLoans		11,721,000tsbk_TotalOfNonAccrualAnd90DaysPastDueLoans
Non-accrual investment securities	1,009,000us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest		1,101,000us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
OREO and other repossessed assets, net	7,866,000us-gaap_OtherRealEstateAndForeclosedAssets		9,092,000us-gaap_OtherRealEstateAndForeclosedAssets
Total non-performing assets	19,799,000tsbk_FinancingReceivablesRecordedInvestmentExcludingAccrualStatusLoans	[1]	21,914,000tsbk_FinancingReceivablesRecordedInvestmentExcludingAccrualStatusLoans	[1]
Troubled debt restructured loans on accrual status	14,794,000us-gaap_FinancingReceivableModificationsRecordedInvestment		19,088,000us-gaap_FinancingReceivableModificationsRecordedInvestment
Non-accrual and 90 days or more past due loans as a percentage of loans receivable	1.84%tsbk_NonAccrualAnd90DaysOrMorePastDueLoansAsPercentageOfLoansReceivable		2.03%tsbk_NonAccrualAnd90DaysOrMorePastDueLoansAsPercentageOfLoansReceivable
Non-accrual and 90 days or more past due loans as a percentage of total assets	1.41%tsbk_NonAccrualAnd90DaysOrMorePastDueLoansAsPercentageOfTotalAssets		1.57%tsbk_NonAccrualAnd90DaysOrMorePastDueLoansAsPercentageOfTotalAssets
Non-performing assets as a percentage of total assets	2.55%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans		2.94%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
Loans receivable	594,654,000tsbk_LoansReceivableIncludingLoansHeldForSaleGross		576,179,000tsbk_LoansReceivableIncludingLoansHeldForSaleGross
Total assets	776,270,000us-gaap_Assets		745,565,000us-gaap_Assets
Loans and Leases Receivable, Impaired, Commitment to Lend	0us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Allowance for Loan Losses Allocated to Troubled Debt Restructured Loans	250,000tsbk_AllowanceforLoanLossesAllocatedtoTroubledDebtRestructuredLoans		990,000tsbk_AllowanceforLoanLossesAllocatedtoTroubledDebtRestructuredLoans
Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	12,673,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember		16,804,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember
Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	2,121,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember		2,284,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember
Mortgage loans, one-to-four family
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	3,751,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember		4,376,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Troubled debt restructured loans on accrual status	3,179,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember		2,867,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Mortgage loans, one-to-four family | Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	3,010,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember		2,634,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Mortgage loans, one-to-four family | Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	169,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember		233,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Mortgage loans, multi-family
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	760,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember		0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Troubled debt restructured loans on accrual status	3,295,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember		3,317,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Mortgage loans, multi-family | Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	3,295,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember		3,317,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Mortgage loans, multi-family | Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	0us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember		0us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Mortgage loans, commercial
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	1,535,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember		1,468,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Troubled debt restructured loans on accrual status	6,863,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember		11,428,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Mortgage loans, commercial | Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	5,328,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember		9,960,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Mortgage loans, commercial | Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	1,535,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember		1,468,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	225,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionCustomAndOwnerbuilderMember		0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionCustomAndOwnerbuilderMember
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionSpeculativeOneToFourFamilyMember		0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionSpeculativeOneToFourFamilyMember
Mortgage loans, construction - Multi-family
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionMultiFamilyMember		0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConstructionMultiFamilyMember
Mortgage loans, land
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	4,214,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember		4,564,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Troubled debt restructured loans on accrual status	1,008,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember		1,025,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Mortgage loans, land | Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	743,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember		594,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Mortgage loans, land | Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	265,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember		431,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Consumer loans, home equity and second mortgage
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	401,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember		498,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember
Troubled debt restructured loans on accrual status	449,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember		451,000us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember
Consumer loans, home equity and second mortgage | Accruing
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	297,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember		299,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember
Consumer loans, home equity and second mortgage | Non-Accrual
Financing Receivable, Modifications [Line Items]
Troubled debt restructured loans on accrual status	152,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember		152,000us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember
Consumer loans, other
Financing Receivable, Modifications [Line Items]
Loans accounted for on a non-accrual basis	$ 38,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember		$ 3,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ConsumerOtherFinancingReceivableMember
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- Definition

Allowance for Loan Losses Allocated to Troubled Debt Restructured Loans

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Total of other real estate owned, repossessed assets, and non-performing loans

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Loans Receivable, Including Loans Held-For-Sale, Gross

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Total of other real estate owned, repossessed assets, and non-performing loans

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Total of other real estate owned, repossessed assets, and non-performing loans

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Total of loans that are 90 or more days past due, and in loans non-accruing.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB

-Name Accounting Standards Codification

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Recorded investment in financing receivables that are 90 days or more past due and still accruing.

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-Publisher FASB

-Name Accounting Standards Codification

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

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Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (a)

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Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans.

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

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