Document And Entity Information
Feb. 04, 2020
Document Information Line Items  
Entity Registrant Name GRIFFON CORPORATION
Trading Symbol GFF
Document Type 8-K
Amendment Flag false
Entity Central Index Key 0000050725
Document Period End Date Feb. 04, 2020
Entity Emerging Growth Company false
Entity File Number 1-06620
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 11-1893410
Entity Address, Address Line One 712 Fifth Avenue
Entity Address, Address Line Two 18th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10019
City Area Code 212
Local Phone Number 957-5000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.25 par value per share
Security Exchange Name NYSE