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| 0000939057-23-000075-index.html | 2023-03-13 17:10:57 | |
| 0000939057-23-000075.txt | 2023-03-13 17:10:57 | |
 0000939057-23-000075-xbrl.zip | 583743 | 2023-03-13 17:10:57 |
| ffnw-20221231.htm | 4155639 | 2023-03-13 17:10:57 |
| ffnw-20221231.xsd | 92039 | 2023-03-13 17:10:57 |
| ffnw-20221231x10kexx21.htm | 5257 | 2023-03-13 17:10:57 |
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| ffnw-20221231x10kexx311.htm | 10003 | 2023-03-13 17:10:57 |
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| ffnw-20221231x10kexx321.htm | 4678 | 2023-03-13 17:10:57 |
| ffnw-20221231x10kexx322.htm | 4664 | 2023-03-13 17:10:57 |
| ffnw-20221231_cal.xml | 146581 | 2023-03-13 17:10:57 |
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| FilingSummary.xml | 61016 | 2023-03-13 17:10:57 |
| Financial_Report.xlsx | 178300 | 2023-03-13 17:10:57 |
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| R1.htm | 57961 | 2023-03-13 17:10:57 |
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| report.css | 2768 | 2023-03-13 17:10:57 |
| Show.js | 1086 | 2023-03-13 17:10:57 |