CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Net sales	$ 932,020	$ 953,045	$ 862,314
Cost of sales	614,841	618,303	549,184
Gross profit on sales	317,179	334,742	313,130
Selling, general and administrative expenses	231,358	243,287	217,080
Restructuring and asset impairment charges	19,425	5,755	2,943
Expenses related to Australia fire	1,748	0	0
Operating income	64,648	85,700	93,107
Interest expense	25,024	26,325	33,233
Bond retirement expenses	0	0	44,379
Other expense	1,521	465	582
Income from continuing operations before tax expense	38,103	58,910	14,913
Income tax expense	15,204	20,640	4,616
Income from continuing operations	22,899	38,270	10,297
Income (loss) from discontinued operations, net of tax	(16,956)	451	(963)
Net income	5,943	38,721	9,334
Net income attributable to noncontrolling interest in subsidiary	0	0	(1,051)
Net income attributable to Interface, Inc.	$ 5,943	$ 38,721	$ 8,283
Income (loss) per share attributable to Interface, Inc. common shareholders - basic
Continuing operations	$ 0.35	$ 0.59	$ 0.14
Discontinued operations	$ (0.26)	$ 0.01	$ (0.01)
Net income per share attributable to Interface, Inc. common shareholders - basic	$ 0.09	$ 0.59	$ 0.13
Income (loss) per share attributable to Interface, Inc. common shareholders - diluted
Continuing operations	$ 0.35	$ 0.58	$ 0.14
Discontinued operations	$ (0.26)	$ 0.01	$ (0.01)
Net income per share attributable to Interface, Inc. common shareholders - diluted	$ 0.09	$ 0.59	$ 0.13
Basic weighted average common shares outstanding	65,767	65,291	63,794
Diluted weighted average common shares outstanding	65,900	65,486	64,262