Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Data [Abstract]
Net revenue	$ 397,057	$ 355,483	$ 330,723	$ 323,657	$ 367,929	$ 338,458	$ 311,655	$ 310,256	$ 1,406,920	$ 1,328,298	$ 1,300,695
Gross Profit	104,079	103,095	91,936	96,932	110,710	103,122	97,788	100,565	396,042	412,185	367,679
Provision for income taxes	52,600	5,767	5,376	7,535	11,754	9,144	9,427	8,893	71,278	39,218	36,980
Net Income	$ (31,934)	$ 20,794	$ 14,582	$ 15,994	$ 22,109	$ 21,119	$ 16,034	$ 16,589	$ 19,436	$ 75,851	$ 48,584
Basic net income per share (in dollars per share)	$ (1.02)	$ 0.66	$ 0.45	$ 0.49	$ 0.67	$ 0.64	$ 0.49	$ 0.51	$ 0.61	$ 2.32	$ 1.47
Diluted net income per share (in dollars per share)	$ (1.02)	$ 0.64	$ 0.44	$ 0.47	$ 0.65	$ 0.62	$ 0.48	$ 0.50	$ 0.59	$ 2.25	$ 1.44