XML 36 R81.htm IDEA: XBRL DOCUMENT v2.4.0.8

Note 15 - Commitments and Contigencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 24.5	$ 22.8	$ 21.7
Rental Expenses Related To Discontinued Operations		$ 2.6	$ 3.2

X

- Definition

Rental Expenses Related To Discontinued Operations

+ References

No definition available.

+ Details

Name:	tile_RentalExpensesRelatedToDiscontinuedOperations
Namespace Prefix:	tile_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration