Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Business Acquisition [Line Items]
Gain on purchase of business	$ 0	$ 0	$ 0	$ (10,937)
Atlas Carpet Mills [Member]
Business Acquisition [Line Items]
Total purchase price consideration				18,759
Gain on purchase of business				10,937
Revenue of Atlas since acquisition date	$ 9,825	$ 12,182	$ 19,980	$ 13,848