XML 15 R1.htm IDEA: XBRL DOCUMENT v3.7.0.1
Document And Entity Information - shares
 3 Months Ended
Apr. 02, 2017
May 05, 2017
Document Information [Line Items]    
Entity Registrant Name INTERFACE INC  
Entity Central Index Key 0000715787  
Trading Symbol tile  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer Yes  
Entity Common Stock, Shares Outstanding (in shares)   62,808,165
Document Type 10-Q  
Document Period End Date Apr. 02, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Amendment Flag false