XML 14 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Document and Entity Information
Feb. 01, 2021
Cover [Abstract]  
Entity Registrant Name WASHINGTON FEDERAL INC
Amendment Flag false
Entity Central Index Key 0000936528
Current Fiscal Year End Date --09-30
Document Type 8-K
Document Period End Date Feb. 01, 2021
Entity Incorporation State Country Code WA
Entity File Number 001-34654
Entity Tax Identification Number 91-1661606
Entity Address, Address Line One 425 Pike Street
Entity Address, City or Town Seattle
Entity Address, State or Province WA
Entity Address, Postal Zip Code 98101
City Area Code (206)
Local Phone Number -624-7930
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, Par Value $1.00 Per Share
Trading Symbol WAFD
Security Exchange Name NASDAQ
Entity Emerging Growth Company false