Commitments and Contingencies Sales Return Liability (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Sales return liability [Roll Forward]
Balance at beginning of year	$ 20,562	$ 15,262
Additions that reduce net sales	54,588	67,944
Deductions from reserves	(57,112)	(63,893)
Balance at end of period	$ 18,038	$ 19,313