XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.25.1

Note 9 - Fair Value Measurements (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
Financial Assets |  | At March 31, 2025 |
Securities available-for-sale: |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
U.S. agency securities |  | $ | — |  |  | $ | 17,568 |  |  | $ | — |  |  | $ | 17,568 |
Corporate securities |  |  | — |  |  |  | 15,187 |  |  |  | — |  |  |  | 15,187 |
Municipal bonds |  |  | — |  |  |  | 70,121 |  |  |  | — |  |  |  | 70,121 |
Mortgage-backed securities |  |  | — |  |  |  | 177,382 |  |  |  | — |  |  |  | 177,382 |
Asset-backed securities |  |  | — |  |  |  | 10,875 |  |  |  | — |  |  |  | 10,875 |
Mortgage loans held for sale, at fair value |  |  | — |  |  |  | 31,038 |  |  |  | — |  |  |  | 31,038 |
Loans receivable, at fair value |  |  | — |  |  |  | 14,526 |  |  |  | — |  |  |  | 14,526 |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate lock commitments with customers |  |  | — |  |  |  | — |  |  |  | 439 |  |  |  | 439 |
Interest rate swaps - cash flow and fair value hedges |  |  | — |  |  |  | 4,242 |  |  |  | — |  |  |  | 4,242 |
Interest rate swaps - dealer offsets to customer swap positions |  |  | — |  |  |  | 50 |  |  |  | — |  |  |  | 50 |
Total assets measured at fair value |  | $ | — |  |  | $ | 340,989 |  |  | $ | 439 |  |  | $ | 341,428 |
Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps - customer swap positions |  | $ | — |  |  | $ | (50 | ) |  | $ | — |  |  | $ | (50 | )
Interest rate swaps - cash flow and fair value hedges |  |  | — |  |  |  | (256 | ) |  |  | — |  |  |  | (256 | )
Mandatory and best effort forward commitments with investors |  |  | — |  |  |  | — |  |  |  | (60 | ) |  |  | (60 | )
Forward TBA mortgage-backed securities |  |  | — |  |  |  | (166 | ) |  |  | — |  |  |  | (166 | )
Total liabilities measured at fair value |  | $ | — |  |  | $ | (472 | ) |  | $ | (60 | ) |  | $ | (532 | )
Financial Assets |  | At December 31, 2024 |
Securities available-for-sale: |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
U.S. agency securities |  | $ | — |  |  | $ | 17,138 |  |  | $ | — |  |  | $ | 17,138 |
Corporate securities |  |  | — |  |  |  | 15,126 |  |  |  | — |  |  |  | 15,126 |
Municipal bonds |  |  | — |  |  |  | 70,344 |  |  |  | — |  |  |  | 70,344 |
Mortgage-backed securities |  |  | — |  |  |  | 167,186 |  |  |  | — |  |  |  | 167,186 |
Asset-backed securities |  |  | — |  |  |  | 11,381 |  |  |  | — |  |  |  | 11,381 |
Mortgage loans held for sale, at fair value |  |  | — |  |  |  | 27,835 |  |  |  | — |  |  |  | 27,835 |
Loans receivable, at fair value |  |  | — |  |  |  | 12,728 |  |  |  | — |  |  |  | 12,728 |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mandatory and best effort forward commitments with investors |  |  | — |  |  |  | — |  |  |  | 31 |  |  |  | 31 |
Interest rate lock commitments with customers |  |  | — |  |  |  | — |  |  |  | 103 |  |  |  | 103 |
Forward TBA mortgage-backed securities |  |  | — |  |  |  | 180 |  |  |  | — |  |  |  | 180 |
Interest rate swaps- cash flow and fair value hedges |  |  | — |  |  |  | 7,244 |  |  |  | — |  |  |  | 7,244 |
Interest rate swaps - dealer offsets to customer swap positions |  |  | — |  |  |  | 62 |  |  |  | — |  |  |  | 62 |
Total assets measured at fair value |  | $ | — |  |  | $ | 329,224 |  |  | $ | 134 |  |  | $ | 329,358 |
Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps - customer swap positions |  | $ | — |  |  | $ | (61 | ) |  | $ | — |  |  | $ | (61 | )
Total liabilities measured at fair value |  | $ | — |  |  | $ | (61 | ) |  | $ | — |  |  | $ | (61 | )
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  | March 31, 2025 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Collateral dependent loans |  | $ | — |  |  | $ | — |  |  | $ | 1,459 |  |  | $ | 1,459 |
MSRs |  |  | — |  |  |  | — |  |  |  | 20,655 |  |  |  | 20,655 |
|  | December 31, 2024 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Collateral dependent loans |  | $ | — |  |  | $ | — |  |  | $ | 1,130 |  |  | $ | 1,130 |
MSRs |  |  | — |  |  |  | — |  |  |  | 21,043 |  |  |  | 21,043 |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
Level 3 |  |  |  | Significant |  |  |  |  |  | Weighted Average Rate |
Fair Value |  | Valuation |  | Unobservable |  |  |  |  |  | March 31, |  |  | December 31, |
Instruments |  | Techniques |  | Inputs |  | Range |  |  | 2025 |  |  | 2024 |
RECURRING |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate lock commitments with customers |  | Quoted market prices |  | Pull-through expectations |  |  | 80% - 99% |  |  |  | 88.2 | % |  |  | 94.0 | %
Individual forward sale commitments with investors |  | Quoted market prices |  | Pull-through expectations |  |  | 80% - 99% |  |  |  | 88.2 | % |  |  | 94.0 | %
NONRECURRING |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral dependent loans |  | Fair value of underlying collateral |  | Discount applied to the obtained appraisal |  |  | 0% - 25% |  |  |  | 1.8 | % |  |  | — | %
MSRs |  | Industry sources |  | Pre-payment speeds |  |  | 0% - 50% |  |  |  | 8.9 | % |  |  | 8.3 | %
Fair Value, Assets (Liabilities) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  |  |  |  |  | Purchases |  |  |  |  |  |  |  |  |  |  | Net change in |  |  | Net change in |
Three Months Ended |  | Beginning |  |  | and |  |  | Sales and |  |  | Ending |  |  | fair value for |  |  | fair value for |
March 31, 2025 |  | Balance |  |  | Issuances |  |  | Settlements |  |  | Balance |  |  | gains/(losses) (1) |  |  | gains/(losses) (2) |
Interest rate lock commitments with customers |  | $ | 103 |  |  | $ | 1,141 |  |  | $ | (805 | ) |  | $ | 439 |  |  | $ | 336 |  |  | $ | — |
Individual forward sale commitments with investors |  |  | 31 |  |  |  | (84 | ) |  |  | (7 | ) |  |  | (60 | ) |  |  | (91 | ) |  |  | — |
March 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate lock commitments with customers |  | $ | 329 |  |  | $ | 965 |  |  | $ | (1,043 | ) |  | $ | 251 |  |  | $ | (78 | ) |  | $ | — |
Individual forward sale commitments with investors |  |  | (188 | ) |  |  | (15 | ) |  |  | 130 |  |  |  | (73 | ) |  |  | 115 |  |  |  | — |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | March 31, 2025 |  |  | December 31, 2024 |
Financial Assets |  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
Level 1 inputs: |  | Amount |  |  | Value |  |  | Amount |  |  | Value |
Cash and cash equivalents |  | $ | 62,741 |  |  | $ | 62,741 |  |  | $ | 31,635 |  |  | $ | 31,635 |
Certificates of deposit at other financial institutions |  |  | 1,234 |  |  |  | 1,234 |  |  |  | 1,727 |  |  |  | 1,727 |
Level 2 inputs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale, at fair value |  |  | 291,133 |  |  |  | 291,133 |  |  |  | 281,175 |  |  |  | 281,175 |
Securities held-to-maturity, gross |  |  | 10,500 |  |  |  | 10,258 |  |  |  | 8,500 |  |  |  | 8,144 |
Loans held for sale, at fair value |  |  | 31,038 |  |  |  | 31,038 |  |  |  | 27,835 |  |  |  | 27,835 |
FHLB stock, at cost |  |  | 5,256 |  |  |  | 5,256 |  |  |  | 15,621 |  |  |  | 15,621 |
Forward TBA mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | 180 |  |  |  | 180 |
Loans receivable, at fair value |  |  | 14,526 |  |  |  | 14,526 |  |  |  | 12,728 |  |  |  | 12,728 |
Interest rate swaps - cash flow and fair value hedges |  |  | 4,242 |  |  |  | 4,242 |  |  |  | 7,244 |  |  |  | 7,244 |
Interest rate swaps - dealer offsets to customer swap positions |  |  | 50 |  |  |  | 50 |  |  |  | 62 |  |  |  | 62 |
Level 3 inputs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans receivable, gross |  |  | 2,518,244 |  |  |  | 2,405,337 |  |  |  | 2,521,093 |  |  |  | 2,385,213 |
MSRs, held at lower of cost or fair value |  |  | 8,926 |  |  |  | 20,655 |  |  |  | 9,204 |  |  |  | 21,043 |
Mandatory and best effort forward commitments with investors |  |  | — |  |  |  | — |  |  |  | 31 |  |  |  | 31 |
Fair value interest rate locks with customers |  |  | 439 |  |  |  | 439 |  |  |  | 103 |  |  |  | 103 |
Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Level 2 inputs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  | 1,233,295 |  |  |  | 1,230,853 |  |  |  | 1,028,896 |  |  |  | 1,024,663 |
Borrowings |  |  | 68,805 |  |  |  | 68,596 |  |  |  | 307,806 |  |  |  | 307,408 |
Subordinated notes, excluding unamortized debt issuance costs |  |  | 50,000 |  |  |  | 48,500 |  |  |  | 50,000 |  |  |  | 45,504 |
Interest rate swaps - cash flow and fair value hedges |  |  | 256 |  |  |  | 256 |  |  |  | — |  |  |  | — |
Forward TBA mortgage-backed securities |  |  | 166 |  |  |  | 166 |  |  |  | — |  |  |  | — |
Interest rate swaps - customer swap positions |  |  | 50 |  |  |  | 50 |  |  |  | 61 |  |  |  | 61 |
Level 3 inputs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mandatory and best effort forward commitments with investors |  |  | 60 |  |  |  | 60 |  |  |  | — |  |  |  | — |

X
- Definition Tabular disclosure of the fair value measurement of assets (liabilities) using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets (liabilities)) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets (liabilities)) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset (liability). + References No definition available. + Details
Name: | fsbw_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock
Namespace Prefix: | fsbw_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financial instrument measured at fair value on recurring or nonrecurring basis. Includes, but is not limited to, instrument classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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