Net Income per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Net Income per Common Share [Abstract]
Net income	$ 11,038	$ 8,481	$ 39,837	$ 25,473
Basic weighted-average shares outstanding	51,672,000	53,648,000	52,009,000	53,880,000
Effect of dilutive securities	872,000	676,000	926,000	690,000
Diluted weighted-average shares outstanding	52,544,000	54,324,000	52,935,000	54,570,000
Net income per share – basic (in USD per share)	$ 0.21	$ 0.16	$ 0.77	$ 0.47
Net income per share – diluted (in USD per share)	$ 0.21	$ 0.16	$ 0.75	$ 0.47