Significant Accounting Policies - Adoption of New Revenue Accounting Standard (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 31, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Consolidated Statements of Cash Flows
Accounts receivable, net		$ (3,931)	$ (3,234)	$ (46)
Prepaid expenses and other current assets		4,960	(25,266)	3,568
Deferred revenue and returns liability		(6,202)	4,453	9,713
Consolidated Statements of Income
Revenues		868,267	768,867	697,626
Cost of revenues		346,868	314,676	276,122
Net income		$ 83,591	$ 47,092	$ 61,494
Earnings per share:
Basic (in dollars per share)		$ 1.94	$ 1.11	$ 1.47
Diluted (in dollars per share)		$ 1.90	$ 1.09	$ 1.45
Consolidated Balance Sheet
Prepaid expenses and other current assets		$ 64,650	$ 39,120
Goodwill		397,344	288,227	$ 276,130
Other assets, net		90,491	88,387
Deferred revenue and returns liability		22,494
Deferred income on shipments to distributors			50,115
Other current liabilities		81,180	73,359
Retained earnings		961,343	$ 851,307
ASU 2014-09 - Revenue from Contracts with Customers
Consolidated Statements of Cash Flows
Accounts receivable, net	$ 230
Prepaid expenses and other current assets	7,579
Other assets, net	(2,282)
Deferred revenue and returns liability	27,806
Deferred income on shipments to distributors	(50,115)
Other current liabilities	1,641
Retained earnings	26,195
Consolidated Statements of Income
Revenues		12,943
Cost of revenues		4,234
Net income		$ 6,610
Earnings per share:
Basic (in dollars per share)		$ 0.15
Diluted (in dollars per share)		$ 0.15
Consolidated Balance Sheet
Prepaid expenses and other current assets		$ 5,953
Goodwill		(2,842)
Other assets, net		(4,464)
Deferred revenue and returns liability		22,494
Deferred income on shipments to distributors		(60,789)
Other current liabilities		4,282
Retained earnings	$ 26,200	$ 32,805