XML 59 R43.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Note 4 - Fair Value of Financial Instruments (Details) $ in Millions | Jan. 03, 2016 USD ($)
--- | ---
Fair Value Disclosures [Abstract] |
Company-owned Life Insurance Assets, Fair Value Disclosure | $ 24.8

X
- Definition The fair value disclosure of company-owned life insurance assets. + References No definition available. + Details
Name: | tile_CompanyOwnedLifeInsuranceAssetsFairValueDisclosure
Namespace Prefix: | tile_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration