Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 223,615	$ 251,073	$ 169,097	$ 167,235	$ 169,769	$ 183,325	$ 199,047	$ 173,484	$ 811,020	$ 725,625	$ 806,338
Gross margin	168,455	191,332	118,777	126,035	124,898	135,693	148,080	127,200	604,599	535,871	600,286
Restructuring charges	875	251	14,798	0					15,924	0	0
Intangible asset impairment charges	0	0	19,571	0					19,571	0	0
Operating income	59,085	96,635	(6,142)	20,951	17,607	43,092	51,756	30,147	170,529	142,602	221,142
Net income	$ 69,345	$ 87,506	$ (1,142)	$ 20,477	$ 80,327	$ 41,685	$ 48,749	$ 33,104	$ 176,186	$ 203,865	$ 219,267
Basic net income (loss) per share (in dollars per share)	$ 0.40	$ 0.50	$ (0.01)	$ 0.12	$ 0.47	$ 0.24	$ 0.28	$ 0.19	$ 1.02	$ 1.19	$ 1.27
Diluted net income (loss) per share (in dollars per share)	$ 0.39	$ 0.49	$ (0.01)	$ 0.12	$ 0.46	$ 0.24	$ 0.28	$ 0.19	$ 1.00	$ 1.16	$ 1.24