XML 42 R33.htm IDEA: XBRL DOCUMENT
v3.23.2

Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands | Jun. 30, 2023 USD ($) security | Sep. 30, 2022 USD ($) security
--- | --- | ---
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 55,630 | $ 189,351
Held to maturity, 12 Months or Longer, Estimated Fair Value | 196,459 | 47,652
Held to maturity, Total, Estimated Fair Value | 252,089 | 237,003
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (946) | (10,937)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (13,904) | (6,148)
Held to maturity, Total, Gross Unrealized Losses | $ (14,850) | $ (17,085)
Held to maturity, Less Than 12 Months, Quantity | security | 27 | 100,000
Held to maturity, 12 Months or Longer, Quantity | security | 96 | 20,000
U.S. Treasury and U.S. government agency securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 19,045 | $ 115,504
Held to maturity, 12 Months or Longer, Estimated Fair Value | 142,413 | 33,638
Held to maturity, Total, Estimated Fair Value | 161,458 | 149,142
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (207) | (7,224)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (9,720) | (4,885)
Held to maturity, Total, Gross Unrealized Losses | $ (9,927) | $ (12,109)
Held to maturity, Less Than 12 Months, Quantity | security | 2 | 17,000
Held to maturity, 12 Months or Longer, Quantity | security | 25 | 9,000
U.S. government agencies |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 26,124 | $ 35,896
Held to maturity, 12 Months or Longer, Estimated Fair Value | 19,498 | 5,306
Held to maturity, Total, Estimated Fair Value | 45,622 | 41,202
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (474) | (1,449)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (2,055) | (1,037)
Held to maturity, Total, Gross Unrealized Losses | $ (2,529) | $ (2,486)
Held to maturity, Less Than 12 Months, Quantity | security | 18 | 54,000
Held to maturity, 12 Months or Longer, Quantity | security | 42 | 5,000
Available-for-sale Securities, Fair Value: |  |
Available for sale, Less Than 12 Months, Estimated Fair Value | $ 22,328 | $ 25,170
Available for sale, 12 Months or Longer, Estimated Fair Value | 21,213 | 15,705
Available for sale, Total, Estimated Fair Value | 43,541 | 40,875
Available-for-sale Securities, Gross Unrealized Losses: |  |
Available for sale, Less Than 12 Months, Gross Unrealized Losses | (188) | (292)
Available for sale, 12 Months or Longer, Gross Unrealized Losses | (742) | (602)
Available for sale, Total, Gross Unrealized Losses | $ (930) | $ (894)
Available-for-sale, Less than 12 Months, Quantity | security | 10 | 16,000
Available-for-sale, 12 Months or Longer, Quantity | security | 21 | 13,000
Private label residential |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 10,461 | $ 35,447
Held to maturity, 12 Months or Longer, Estimated Fair Value | 32,351 | 8,708
Held to maturity, Total, Estimated Fair Value | 42,812 | 44,155
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | (265) | (2,166)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (2,030) | (226)
Held to maturity, Total, Gross Unrealized Losses | $ (2,295) | $ (2,392)
Held to maturity, Less Than 12 Months, Quantity | security | 7 | 27,000
Held to maturity, 12 Months or Longer, Quantity | security | 27 | 6,000
Taxable municipal securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 0 | $ 2,035
Held to maturity, 12 Months or Longer, Estimated Fair Value | 1,749 | 0
Held to maturity, Total, Estimated Fair Value | 1,749 | 2,035
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | 0 | (67)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (47) | 0
Held to maturity, Total, Gross Unrealized Losses | $ (47) | $ (67)
Held to maturity, Less Than 12 Months, Quantity | security | 0 | 1,000
Held to maturity, 12 Months or Longer, Quantity | security | 1 | 0
Bank issued trust preferred securities |  |
Held-to-maturity Securities, Fair Value: |  |
Held to maturity, Less Than 12 Months, Estimated Fair Value | $ 0 | $ 469
Held to maturity, 12 Months or Longer, Estimated Fair Value | 448 | 0
Held to maturity, Total, Estimated Fair Value | 448 | 469
Held-to-maturity Securities, Gross Unrealized Losses |  |
Held to maturity, Less Than 12 Months, Gross Unrealized Losses | 0 | (31)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses | (52) | 0
Held to maturity, Total, Gross Unrealized Losses | $ (52) | $ (31)
Held to maturity, Less Than 12 Months, Quantity | security | 0 | 1,000
Held to maturity, 12 Months or Longer, Quantity | security | 1 | 0

X
- Definition Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, 12 Months or Longer + References No definition available. + Details
Name: | tsbk_AvailableforsaleSecuritiesinUnrealizedLossPositionsQualitativeDisclosureNumberofPositions12MonthsorLonger
Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less Than 12 Months + References No definition available. + Details
Name: | tsbk_AvailableforsaleSecuritiesinUnrealizedLossPositionsQualitativeDisclosureNumberofPositionsLessThan12Months
Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, 12 Months or Longer + References No definition available. + Details
Name: | tsbk_HeldtomaturitySecuritiesinUnrealizedLossPositionsQualitativeDisclosureNumberofPositions12MonthsorLonger
Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less Than 12 Months + References No definition available. + Details
Name: | tsbk_HeldtomaturitySecuritiesinUnrealizedLossPositionsQualitativeDisclosureNumberofPositionsLessThan12Months
Namespace Prefix: | tsbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_TaxableMunicipalNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |