Stockholders' Equity - Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Amounts Reclassified from AOCI
Interest expense	$ (641)	$ (728)	$ (1,296)	$ (1,473)
Income before income taxes	17,269	8,531	23,342	15,598
Income tax benefit	(1,710)	(956)	(1,975)	(1,645)
Net income	15,559	7,575	21,367	13,953
Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Income before income taxes	(61)	(81)	(127)	(221)
Income tax benefit	22	28	45	78
Net income	(39)	(53)	(82)	(143)
Unrealized Gain on Cash Flow Hedge | Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Interest expense	$ (61)	$ (81)	$ (127)	(211)
Net Unrealized Losses on Available-For-Sale Securities | Reclassifications From Accumulated Other Comprehensive Loss
Amounts Reclassified from AOCI
Interest income				$ (10)