Stockholders' Equity (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Amounts Reclassified from AOCI
Interest expense	$ (687)	$ (768)	$ (2,160)	$ (2,346)
Income before income taxes	10,442	9,109	26,040	38,905
Income tax benefit	(467)	(3,501)	(2,112)	(10,908)
Net income	9,975	5,608	23,928	27,997
Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Income before income taxes	(165)	(142)	(386)	(428)
Income tax benefit	58	50	135	150
Net income	(107)	(92)	(251)	(278)
Unrealized Gain on Cash Flow Hedge | Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Interest expense	$ (165)	$ (142)	(376)	$ (428)
Net Unrealized Losses on Available-For-Sale Securities | Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Interest income			$ (10)