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Loans Receivable And Allowance For Loan Losses: Schedule 1 of Troubled debt restructured loans (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Sep. 30, 2014
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Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | $ 14,794 us-gaap_FinancingReceivableModificationsRecordedInvestment | $ 19,088 us-gaap_FinancingReceivableModificationsRecordedInvestment
Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 12,673 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember | 16,804 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember
Non-Accrual |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 2,121 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember | 2,284 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember
Mortgage loans, one-to-four family |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 3,179 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember | 2,867 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Mortgage loans, one-to-four family | Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 3,010 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember | 2,634 us-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 loan | 169 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember | 233 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansOneToFourFamilyMember
Mortgage loans, multi-family |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 3,295 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember | 3,317 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Mortgage loans, multi-family | Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 3,295 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember | 3,317 us-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 loan | 0 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember | 0 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansMultiFamilyMember
Mortgage loans, commercial |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 6,863 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 11,428 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Mortgage loans, commercial | Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 5,328 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 9,960 us-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 loan | 1,535 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 1,468 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Mortgage loans, land |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 1,008 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember | 1,025 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Mortgage loans, land | Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 743 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember | 594 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Mortgage loans, land | Non-Accrual |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 265 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember | 431 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_MortgageLoansLandMember
Consumer loans, home equity and second mortgage |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 449 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember | 451 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember
Consumer loans, home equity and second mortgage | Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructured loan | 297 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_AccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember | 299 us-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 loan | $ 152 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember | $ 152 us-gaap_FinancingReceivableModificationsRecordedInvestment / tsbk_AccrualStatusAxis = tsbk_NonAccrualMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = tsbk_ConsumerLoansHomeEquityAndSecondMortgageMember

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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