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Document and Entity Information
Nov. 20, 2019
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 20, 2019
Entity Registrant Name KEARNY FINANCIAL CORP.
Entity Incorporation, State or Country Code MD
Entity File Number 001-37399
Entity Tax Identification Number 30-0870244
Entity Address, Address Line One 120 Passaic Avenue
Entity Address, City or Town Fairfield
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07004
City Area Code 973
Local Phone Number 244-4500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001617242
Title of 12(b) Security Common Stock, $0.01 par value
Trading Symbol KRNY
Security Exchange Name NASDAQ