Net Income per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Net Income per Common Share [Abstract]
Net income	$ 25,745	$ 31,854	$ 40,130	$ 71,691
Basic weighted-average shares outstanding	45,621,000	50,945,000	46,705,000	51,654,000
Effect of dilutive securities	729,000	756,000	708,000	870,000
Diluted weighted-average shares outstanding	46,350,000	51,701,000	47,413,000	52,524,000
Net income per share – basic (in USD per share)	$ 0.56	$ 0.63	$ 0.86	$ 1.39
Net income per share – diluted (in USD per share)	$ 0.56	$ 0.62	$ 0.85	$ 1.36