    <SEC-DOCUMENT>0000936528-23-000136-index.html : 20230515
    <SEC-HEADER>0000936528-23-000136.hdr.sgml : 20230515
    <ACCEPTANCE-DATETIME>20230512192953
    ACCESSION NUMBER:		0000936528-23-000136
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		54
    CONFORMED PERIOD OF REPORT:	20230512
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20230515
    DATE AS OF CHANGE:		20230512

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WASHINGTON FEDERAL INC
    		CENTRAL INDEX KEY:			0000936528
    		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
    		IRS NUMBER:				911661606
    		STATE OF INCORPORATION:			WA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34654
    		FILM NUMBER:		23917814

    	BUSINESS ADDRESS:
    		STREET 1:		425 PIKE STREET
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98101
    		BUSINESS PHONE:		2066247930

    	MAIL ADDRESS:
    		STREET 1:		425 PIKE ST
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98101
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>wfsl-20230512.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: wfsl-20230512.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>wafdinvestorpresentation.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: wafdinvestorpresentation.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>wfsl-20230512.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: wfsl-20230512.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>4
    <FILENAME>wfsl-20230512_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: wfsl-20230512_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>wfsl-20230512_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: wfsl-20230512_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>wfsl-20230512_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: wfsl-20230512_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>wafdinvestorpresentation001.jpg
    <TEXT>
    Document 7 - file: wafdinvestorpresentation001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>wafdinvestorpresentation002.jpg
    <TEXT>
    Document 8 - file: wafdinvestorpresentation002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>wafdinvestorpresentation003.jpg
    <TEXT>
    Document 9 - file: wafdinvestorpresentation003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>wafdinvestorpresentation004.jpg
    <TEXT>
    Document 10 - file: wafdinvestorpresentation004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>wafdinvestorpresentation005.jpg
    <TEXT>
    Document 11 - file: wafdinvestorpresentation005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>wafdinvestorpresentation006.jpg
    <TEXT>
    Document 12 - file: wafdinvestorpresentation006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>wafdinvestorpresentation007.jpg
    <TEXT>
    Document 13 - file: wafdinvestorpresentation007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>wafdinvestorpresentation008.jpg
    <TEXT>
    Document 14 - file: wafdinvestorpresentation008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>wafdinvestorpresentation009.jpg
    <TEXT>
    Document 15 - file: wafdinvestorpresentation009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>wafdinvestorpresentation010.jpg
    <TEXT>
    Document 16 - file: wafdinvestorpresentation010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>wafdinvestorpresentation011.jpg
    <TEXT>
    Document 17 - file: wafdinvestorpresentation011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>wafdinvestorpresentation012.jpg
    <TEXT>
    Document 18 - file: wafdinvestorpresentation012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>wafdinvestorpresentation013.jpg
    <TEXT>
    Document 19 - file: wafdinvestorpresentation013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>wafdinvestorpresentation014.jpg
    <TEXT>
    Document 20 - file: wafdinvestorpresentation014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>wafdinvestorpresentation015.jpg
    <TEXT>
    Document 21 - file: wafdinvestorpresentation015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>wafdinvestorpresentation016.jpg
    <TEXT>
    Document 22 - file: wafdinvestorpresentation016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>wafdinvestorpresentation017.jpg
    <TEXT>
    Document 23 - file: wafdinvestorpresentation017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>wafdinvestorpresentation018.jpg
    <TEXT>
    Document 24 - file: wafdinvestorpresentation018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>wafdinvestorpresentation019.jpg
    <TEXT>
    Document 25 - file: wafdinvestorpresentation019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>wafdinvestorpresentation020.jpg
    <TEXT>
    Document 26 - file: wafdinvestorpresentation020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>wafdinvestorpresentation021.jpg
    <TEXT>
    Document 27 - file: wafdinvestorpresentation021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>wafdinvestorpresentation022.jpg
    <TEXT>
    Document 28 - file: wafdinvestorpresentation022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>wafdinvestorpresentation023.jpg
    <TEXT>
    Document 29 - file: wafdinvestorpresentation023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>wafdinvestorpresentation024.jpg
    <TEXT>
    Document 30 - file: wafdinvestorpresentation024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>wafdinvestorpresentation025.jpg
    <TEXT>
    Document 31 - file: wafdinvestorpresentation025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>wafdinvestorpresentation026.jpg
    <TEXT>
    Document 32 - file: wafdinvestorpresentation026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>wafdinvestorpresentation027.jpg
    <TEXT>
    Document 33 - file: wafdinvestorpresentation027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>wafdinvestorpresentation028.jpg
    <TEXT>
    Document 34 - file: wafdinvestorpresentation028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>wafdinvestorpresentation029.jpg
    <TEXT>
    Document 35 - file: wafdinvestorpresentation029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>wafdinvestorpresentation030.jpg
    <TEXT>
    Document 36 - file: wafdinvestorpresentation030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>wafdinvestorpresentation031.jpg
    <TEXT>
    Document 37 - file: wafdinvestorpresentation031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>wafdinvestorpresentation032.jpg
    <TEXT>
    Document 38 - file: wafdinvestorpresentation032.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>wafdinvestorpresentation033.jpg
    <TEXT>
    Document 39 - file: wafdinvestorpresentation033.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>wafdinvestorpresentation034.jpg
    <TEXT>
    Document 40 - file: wafdinvestorpresentation034.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>wafdinvestorpresentation035.jpg
    <TEXT>
    Document 41 - file: wafdinvestorpresentation035.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>wafdinvestorpresentation036.jpg
    <TEXT>
    Document 42 - file: wafdinvestorpresentation036.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>wafdinvestorpresentation037.jpg
    <TEXT>
    Document 43 - file: wafdinvestorpresentation037.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>wafdinvestorpresentation038.jpg
    <TEXT>
    Document 44 - file: wafdinvestorpresentation038.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>wafdinvestorpresentation039.jpg
    <TEXT>
    Document 45 - file: wafdinvestorpresentation039.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>wafdinvestorpresentation040.jpg
    <TEXT>
    Document 46 - file: wafdinvestorpresentation040.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>48
    <FILENAME>wfsl-20230512_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: wfsl-20230512_htm.html

    Document 48 - RAW XML: wfsl-20230512_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>49
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>50
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>51
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>52
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 52 - file: FilingSummary.html

    Document 52 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>54
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 54 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>55
    <FILENAME>0000936528-23-000136-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 55 - file: 0000936528-23-000136-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>