Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Total stock-based compensation expense	$ 3,933	$ 1,666	$ 11,809	$ 9,272
Income tax benefit	1,314	556	3,968	3,180
Total stock-based compensation expense, net of tax	2,619	1,110	7,841	6,092
Excess tax benefits, included in income tax expense	200	0	$ 1,400	0
Document Period End Date			Sep. 30, 2017
Stock awards [Member]
Total stock-based compensation expense	3,339	1,121	$ 10,059	7,533
Stock Options [Member]
Total stock-based compensation expense	$ 594	$ 545	$ 1,750	$ 1,739