XML 54 R40.htm IDEA: XBRL DOCUMENT
v3.24.3

Investment Securities (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2024
Investments [Abstract] |
Marketable Securities | Held to maturity and available for sale investment securities were as follows as of September 30, 2024 and 2023 (dollars in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value |  | ACL
September 30, 2024 |  |  |  |  |  |  |  |  |
Held to Maturity |  |  |  |  |  |  |  |  |
U.S. Treasury and U.S. government agency securities | $ | 92,312 |  |  | $ | 70 |  |  | $ | (4,197) |  |  | $ | 88,185 |  |  | $ | — |
Mortgage-backed securities ("MBS"): |  |  |  |  |  |  |  |  |
U.S. government agencies | 49,481 |  |  | 174 |  |  | (1,378) |  |  | 48,277 |  |  | — |
Private label residential | 28,479 |  |  | 231 |  |  | (980) |  |  | 27,730 |  |  | 55 |
Municipal securities | 1,330 |  |  | 8 |  |  | — |  |  | 1,338 |  |  | — |
Bank issued trust preferred securities | 495 |  |  | — |  |  | (18) |  |  | 477 |  |  | 5 |
Total | $ | 172,097 |  |  | $ | 483 |  |  | $ | (6,573) |  |  | $ | 166,007 |  |  | $ | 60 |
Available for Sale |  |  |  |  |  |  |  |  |
U.S. government securities | $ | 3,934 |  |  | $ | 6 |  |  | $ | (1) |  |  | $ | 3,939 |  |  |
MBS: U.S. government agencies | 68,297 |  |  | 545 |  |  | (524) |  |  | 68,318 |  |  |
Total | $ | 72,231 |  |  | $ | 551 |  |  | $ | (525) |  |  | $ | 72,257 |  |  |
September 30, 2023 |  |  |  |  |  |  |  |  |
Held to Maturity |  |  |  |  |  |  |  |  |
U.S. Treasury and U.S. government agency securities | $ | 171,626 |  |  | $ | — |  |  | $ | (10,088) |  |  | $ | 161,538 |  |  |
MBS: |  |  |  |  |  |  |  |  |
U.S. government agencies | 52,294 |  |  | — |  |  | (3,950) |  |  | 48,344 |  |  |
Private label residential | 44,011 |  |  | 295 |  |  | (2,611) |  |  | 41,695 |  |  |
Municipal securities | 1,787 |  |  | — |  |  | (47) |  |  | 1,740 |  |  |
Bank issued trust preferred securities | 500 |  |  | — |  |  | (51) |  |  | 449 |  |  |
Total | $ | 270,218 |  |  | $ | 295 |  |  | $ | (16,747) |  |  | $ | 253,766 |  |  |
Available for Sale |  |  |  |  |  |  |  |  |
MBS: U.S. government agencies | $ | 43,132 |  |  | $ | — |  |  | $ | (1,361) |  |  | $ | 41,771 |  |  |
Total | $ | 43,132 |  |  | $ | — |  |  | $ | (1,361) |  |  | $ | 41,771 |  |  |
Unrealized Gain (Loss) on Investments | Held to maturity and available for sale investment securities with unrealized losses were as follows as of September 30, 2024 (dollars in thousands):
| Less Than 12 Months |  | 12 Months or Longer |  | Total
| Estimated Fair Value |  | Gross Unrealized Losses |  | Qty |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Qty |  | Estimated Fair Value |  | Gross Unrealized Losses
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and U.S. government agency securities | $ | — |  |  | $ | — |  |  | — |  |  | $ | 78,363 |  |  | $ | (4,197) |  |  | 17 |  |  | $ | 78,363 |  |  | $ | (4,197) |
MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agencies | 1 |  |  | — |  |  | 1 |  |  | 28,618 |  |  | (1,378) |  |  | 44 |  |  | 28,619 |  |  | (1,378) |
Private label residential | 804 |  |  | (6) |  |  | 1 |  |  | 20,447 |  |  | (974) |  |  | 19 |  |  | 21,251 |  |  | (980) |
Bank issued trust preferred securities | — |  |  | — |  |  | — |  |  | 477 |  |  | (18) |  |  | 1 |  |  | 477 |  |  | (18) |
Total | $ | 805 |  |  | $ | (6) |  |  | 2 |  |  | $ | 127,905 |  |  | $ | (6,567) |  |  | 81 |  |  | $ | 128,710 |  |  | $ | (6,573) |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities | $ | 1,962 |  |  | $ | (1) |  |  | 1 |  |  | $ | — |  |  | $ | — |  |  | — |  |  | $ | 1,962 |  |  | $ | (1) |
MBS: U.S. government agencies | 11,368 |  |  | (117) |  |  | 4 |  |  | 25,751 |  |  | (407) |  |  | 23 |  |  | 37,119 |  |  | (524) |
Total | $ | 13,330 |  |  | $ | (118) |  |  | 5 |  | $ | 25,751 |  |  | $ | (407) |  |  | 23 |  |  | $ | 39,081 |  |  | $ | (525) |
Held to maturity and available for sale investment securities with unrealized losses were as follows as of September 30, 2023 (dollars in thousands):
| Less Than 12 Months |  | 12 Months or Longer |  | Total
| Estimated Fair Value |  | Gross Unrealized Losses |  | Qty |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Qty |  | Estimated Fair Value |  | Gross Unrealized Losses
Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and U.S. government agency securities | $ | 9,455 |  |  | $ | (129) |  |  | 1 |  |  | $ | 152,082 |  |  | $ | (9,959) |  |  | 26 |  |  | $ | 161,537 |  |  | $ | (10,088) |
MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agencies | 16,432 |  |  | (549) |  |  | 13 |  |  | 31,703 |  |  | (3,401) |  |  | 51 |  |  | 48,135 |  |  | (3,950) |
Private label residential | 1,288 |  |  | (2) |  |  | 1 |  |  | 38,205 |  |  | (2,609) |  |  | 32 |  |  | 39,493 |  |  | (2,611) |
Municipal securities | — |  |  | — |  |  | — |  |  | 1,740 |  |  | (47) |  |  | 1 |  |  | 1,740 |  |  | (47) |
Bank issued trust preferred securities | — |  |  | — |  |  | — |  |  | 449 |  |  | (51) |  |  | 1 |  |  | 449 |  |  | (51) |
Total | $ | 27,175 |  |  | $ | (680) |  |  | 15 |  |  | $ | 224,179 |  |  | $ | (16,067) |  |  | 111 |  |  | $ | 251,354 |  |  | $ | (16,747) |
Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agencies | $ | 10,635 |  |  | $ | (308) |  |  | 3 |  |  | $ | 30,809 |  |  | $ | (1,053) |  |  | 27 |  |  | $ | 41,444 |  |  | $ | (1,361) |
Total | $ | 10,635 |  |  | $ | (308) |  |  | 3 |  |  | $ | 30,809 |  |  | $ | (1,053) |  |  | 27 |  |  | $ | 41,444 |  |  | $ | (1,361) |
Other than Temporary Impairment, Credit Losses Recognized in Earnings |
Schedule of Contractual Maturities of Debt Securities | The contractual maturities of debt securities at September 30, 2024 are as follows (dollars in thousands). Expected maturities may differ from scheduled maturities due to the prepayment of principal or call provisions.
| Held to Maturity |  | Available for Sale
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 27,472 |  |  | $ | 27,262 |  |  | $ | 3,934 |  |  | $ | 3,939 |
Due after one year to five years | 81,840 |  |  | 77,870 |  |  | 2,131 |  |  | 2,130 |
Due after five years to ten years | 1,250 |  |  | 1,277 |  |  | 5,160 |  |  | 5,144 |
Due after ten years | 61,535 |  |  | 59,598 |  |  | 61,006 |  |  | 61,044 |
Total | $ | 172,097 |  |  | $ | 166,007 |  |  | $ | 72,231 |  |  | $ | 72,257 |
Summary of Credit Loss by Portfolio Segment | The following table sets forth information for the year ended September 30, 2024 regarding activity in the ACL by portfolio segment (dollars in thousands):
|  | Year Ended September 30, 2024
Held to Maturity |  | Beginning Allowance |  | Impact of Adopting CECL (ASU 2016-13) |  | Provision for (Recapture of ) Credit Losses |  | Ending Allowance
MBS: |  |  |  |  |  |  |  |
Private label residential |  | $ | — |  |  | $ | 82 |  |  | $ | (27) |  |  | $ | 55 |
Bank issued trust preferred securities |  | — |  |  | 10 |  |  | (5) |  |  | 5 |
Total |  | $ | — |  |  | $ | 92 |  |  | $ | (32) |  |  | $ | 60 |
Summary of Held to Maturity Investment Securities by Risk | The following table sets forth the Company's held to maturity investment securities at September 30, 2024 by credit quality indicator (dollars in thousands):
| Credit Ratings
As of September 30, 2024 | AAA/AA/A |  | BBB/BB/B |  | Unrated |  | Total
Held to Maturity |  |  |  |  |  |  |
U.S. Treasury and U.S. government agency securities | $ | 92,312 |  |  | $ | — |  |  | $ | — |  |  | $ | 92,312 |
MBS: |  |  |  |  |  |  |
U.S. government agencies | 49,481 |  |  | — |  |  | — |  |  | 49,481 |
Private label securities | 16,277 |  |  | — |  |  | 12,202 |  |  | 28,479 |
Municipal securities | 1,230 |  |  | — |  |  | 100 |  |  | 1,330 |
Bank issued trust preferred securities | — |  |  | — |  |  | 495 |  |  | 495 |
Total held to maturity | $ | 159,300 |  |  | $ | — |  |  | $ | 12,797 |  |  | $ | 172,097 |
Schedule of Significant Inputs Utilized to Measure Estimate of Credit Loss Component on OTTI Securities | The following table represents a roll forward of the credit loss component of held to maturity investment securities that have been written down for OTTI with the credit loss component recognized in earning for the years ended September 30, 2024, 2023 and 2022 (dollars in thousands):
| 2024 |  | 2023 |  | 2022
Balance, beginning of year | $ | 816 |  |  | $ | 836 |  |  | $ | 853 |
Subtractions: |  |  |  |  |
Net realized gain (losses) previously recorded as credit losses | (2) |  |  | (11) |  |  | 1 |
Recovery of prior credit loss | (11) |  |  | (9) |  |  | (18) |
Balance, end of year | $ | 803 |  |  | $ | 816 |  |  | $ | 836 |

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | tsbk_ScheduleOfContractualMaturitiesOfDebtSecuritiesTableTextBlock
Namespace Prefix: | tsbk_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | tsbk_ScheduleOfSignificantInputsUtilizedToMeasureEstimateOfCreditLossComponentOnOttiSecuritiesTableTextBlock
Namespace Prefix: | tsbk_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure 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 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of credit quality indicator for 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 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_DebtSecuritiesHeldToMaturityCreditQualityIndicatorTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of other than temporary impairment (OTTI) related to credit losses recognized in earnings including: (a) the beginning balance of the amount related to credit losses on debt securities held by the investor at the beginning of the period for which a portion of an OTTI was recognized in other comprehensive income; (b) additions for the amount related to the credit loss for which an OTTI was not previously recognized; (c) reductions for securities sold during the period (realized); (d) reductions for securities for which the amount previously recognized in other comprehensive income was recognized in earnings because the investor intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis; (e) additional increases to the amount related to the credit loss for which an OTTI was previously recognized when the investor does not intend to sell the security and it is not more likely than not that the investor will be required to sell the security before recovery of its amortized cost basis; (f) reductions for increases in cash flows expected to be collected that are recognized over the remaining life of the security; and (g) the ending balance of the amount related to credit losses on debt securities held by the entity at the end of the period for which a portion of an OTTI was recognized in other comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 320 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-8 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration