Quarterly Financial Data - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 26, 2021	Mar. 27, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019
Revenues	$ 719,855	$ 665,029	$ 628,288	$ 619,357	$ 545,369	$ 561,916	$ 551,070	$ 533,040
Cost of Revenue	235,830	222,144	211,866	202,343	183,001	195,479	190,546	189,717
Quarterly Financial Data [Abstract]
Gross margin	$ 484,025	$ 442,885	$ 416,422	$ 417,014	$ 362,368	$ 366,437	$ 360,524	$ 343,323
Gross margin %	67.20%	66.60%	66.30%	67.30%	66.40%	65.20%	65.40%	64.40%
% of net revenues	39.40%	37.20%	34.00%	32.50%	32.60%	32.60%	30.70%	29.30%
Earnings (loss) per share:
Basic net income per share	$ 0.95	$ 0.82	$ 0.69	$ 0.64	$ 0.78	$ 0.60	$ 0.54	$ 0.52
Diluted net income per share	$ 0.93	$ 0.81	$ 0.68	$ 0.63	$ 0.77	$ 0.59	$ 0.53	$ 0.51
Shares used in the calculation of earnings (loss) per share:
Weighted Average Number of Shares Outstanding, Basic	268,160	267,892	267,299	266,831	266,639	269,003	270,330	271,388
Diluted	271,445	271,396	270,792	269,529	268,777	271,579	273,269	274,436
Common Stock, Dividends, Per Share, Cash Paid	$ 0	$ 0	$ 0	$ 0.48	$ 0.48	$ 0.48	$ 0.48	$ 0.48