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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 |  |

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