XML 49 R37.htm IDEA: XBRL DOCUMENT v3.25.0.1

Investment Securities: Credit Loss by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance	$ 60	$ 0
Provision for (Recapture of) Credit Losses	(5)	(10)
Ending Allowance	55	82
Cumulative Effect, Period of Adoption, Adjustment
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance		92
Private label residential
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance	55	0
Provision for (Recapture of) Credit Losses	(3)	(9)
Ending Allowance	52	73
Private label residential | Cumulative Effect, Period of Adoption, Adjustment
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance		82
Bank issued trust preferred securities
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance	5	0
Provision for (Recapture of) Credit Losses	(2)	(1)
Ending Allowance	$ 3	9
Bank issued trust preferred securities | Cumulative Effect, Period of Adoption, Adjustment
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Beginning Allowance		$ 10

X

- Definition

Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Provision for (Recapture of) Credit Losses

+ References

No definition available.

+ Details

Name:	tsbk_DebtSecuritiesHeldToMaturityExcludingAccruedInterestProvisionForRecaptureOfCreditLosses
Namespace Prefix:	tsbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

Name:	us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_DebtSecuritiesHeldtomaturityAllowanceForCreditLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
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_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: