Significant Accounting Policies - Adoption of New Revenue Accounting Standard (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 31, 2017	Dec. 30, 2017
Adoption of New Accounting Standard
Retained earnings	$ 904,160			$ 851,307
Condensed Consolidated Statements of Cash Flows
Accounts receivable, net	3,307	$ 1,252
Prepaid expenses and other current assets	17,169	(6,708)
Deferred revenue and returns liability	(2,599)	4,038
Condensed Consolidated Statements of Income
Cost of revenues	(81,147)	(73,867)
Net income	$ 26,405	$ 15,426
Earnings per share:
Basic (in dollars per share)	$ 0.61	$ 0.37
Diluted (in dollars per share)	$ 0.60	$ 0.36
Condensed Consolidated Balance Sheet
Prepaid expenses and other current assets	$ 64,555			39,120
Other assets, net	94,837			88,387
Deferred revenue and returns liability	25,426
Deferred income on shipments to distributors				(50,115)
Other current liabilities	69,310			73,359
Retained earnings	$ 904,160			$ 851,307
Performance Obligations
Product replacement warranty	1 year
Accounting Standards Update 2014-09 - Revenue from Contracts with Customers
Adoption of New Accounting Standard
Retained earnings	$ 26,585
Condensed 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
Condensed Consolidated Statements of Income
Revenue	698
Cost of revenues	(250)
Net income	$ 390
Earnings per share:
Basic (in dollars per share)	$ 0.01
Diluted (in dollars per share)	$ 0.01
Condensed Consolidated Balance Sheet
Prepaid expenses and other current assets	$ 5,425
Other assets, net	(2,952)
Deferred revenue and returns liability	25,426
Deferred income on shipments to distributors	(52,051)
Other current liabilities	2,636
Retained earnings	$ 26,585
Accounting Standards Update 2014-09 - Revenue from Contracts with Customers | Early Adoption, Effect
Adoption of New Accounting Standard
Retained earnings			$ 26,200
Condensed Consolidated Balance Sheet
Retained earnings			$ 26,200