Cover Page - USD ($)	12 Months Ended
	Jan. 01, 2023	Feb. 17, 2023	Jul. 01, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jan. 01, 2023
Document Transition Report	false
Entity File Number	001-33994
Entity Registrant Name	INTERFACE INC
Entity Incorporation, State or Country Code	GA
Entity Tax Identification Number	58-1451243
Entity Address, Address Line One	1280 West Peachtree Street
Entity Address, City or Town	Atlanta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30309
City Area Code	770
Local Phone Number	437-6800
Title of 12(b) Security	Common Stock, $0.10 Par Value Per Share
Security Exchange Name	NASDAQ
Trading Symbol	TILE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 733,152,974
Entity Common Stock, Shares Outstanding		58,075,390
Entity Central Index Key	0000715787
Amendment Flag	false
Current Fiscal Year End Date	--01-01
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Documents Incorporated by Reference	Portions of the Proxy Statement for the 2023 Annual Meeting of Shareholders are incorporated by reference into Part III.