v3.22.4
Document and Entity Information
Jan. 26, 2023
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Jan. 26, 2023
Entity Registrant Name WASHINGTON FEDERAL INC
Entity Central Index Key 0000936528
Amendment Flag false
Entity Incorporation, State or 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
Entity Emerging Growth Company false
Series A Preferred Stock  
Document Information [Line Items]  
Title of 12(b) Security Depositary Shares, Each Representing a 1/40th Interest in a Share of 4.875% Fixed Rate Series A Non-Cumulative Perpetual Preferred Stock
Trading Symbol WAFDP
Security Exchange Name NASDAQ
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, $1.00 par value per share
Trading Symbol WAFD
Security Exchange Name NASDAQ