Net Income per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Net Income per Common Share [Abstract]
Net income	$ 1,416	$ 11,038	$ 14,385	$ 39,837
Basic weighted-average shares outstanding	46,394,000	51,672,000	47,247,000	52,009,000
Effect of dilutive securities	650,000	872,000	698,000	926,000
Diluted weighted-average shares outstanding	47,044,000	52,544,000	47,945,000	52,935,000
Net income per share – basic (in USD per share)	$ 0.03	$ 0.21	$ 0.30	$ 0.77
Net income per share – diluted (in USD per share)	$ 0.03	$ 0.21	$ 0.30	$ 0.75