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Acquisitions - Z-Wave (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 18, 2018 | Dec. 29, 2018 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Purchase price allocation |  |  |  |  |
Weighted-Average Amortization Period (Years) |  |  | 8 years | 8 years |
Goodwill |  | $ 397,344 | $ 397,344 | $ 288,227 | $ 276,130
Revenues |  |  | 868,267 | 768,867 | $ 697,626
Pro forma financial information |  |  |  |  |
Revenues |  |  | 882,109 | 824,009 |
Net income |  |  | $ 87,874 | $ 27,958 |
Earnings per share, Basic |  |  | $ 2.04 | $ 0.66 |
Earnings per share, Diluted |  |  | $ 2.00 | $ 0.65 |
Customer relationships |  |  |  |  |
Purchase price allocation |  |  |  |  |
Weighted-Average Amortization Period (Years) |  |  | 5 years | 5 years |
Trademarks |  |  |  |  |
Purchase price allocation |  |  |  |  |
Weighted-Average Amortization Period (Years) |  |  | 7 years | 7 years |
Z-Wave |  |  |  |  |
Acquisitions |  |  |  |  |
Cash consideration | $ 243,000 |  |  |  |
Purchase price allocation |  |  |  |  |
Intangible assets | 125,675 |  |  |  |
Cash and cash equivalents | 2,841 |  |  |  |
Accounts receivable | 5,311 |  |  |  |
Inventory | 15,581 |  |  |  |
Other current assets | 329 |  |  |  |
Goodwill | 109,117 |  |  |  |
Other non-current assets | 2,587 |  |  |  |
Accounts payable | (3,306) |  |  |  |
Other current liabilities | (8,918) |  |  |  |
Other non-current liabilities | (6,648) |  |  |  |
Total purchase price | $ 242,569 |  |  |  |
Discount rate applicable to the projected cash flows (as a percent) | 15.00% |  |  |  |
Revenues |  | 37,000 |  |  |
Z-Wave | Selling, general and administrative |  |  |  |  |
Purchase price allocation |  |  |  |  |
Acquisition-related costs |  | $ 4,900 |  |  |
Z-Wave | Developed technology |  |  |  |  |
Purchase price allocation |  |  |  |  |
Intangible assets | $ 69,875 |  |  |  |
Weighted-Average Amortization Period (Years) | 7 years |  |  |  |
Z-Wave | Customer relationships |  |  |  |  |
Purchase price allocation |  |  |  |  |
Intangible assets | $ 25,000 |  |  |  |
Weighted-Average Amortization Period (Years) | 4 years |  |  |  |
Z-Wave | Trademarks |  |  |  |  |
Purchase price allocation |  |  |  |  |
Intangible assets | $ 9,900 |  |  |  |
Weighted-Average Amortization Period (Years) | 7 years |  |  |  |
Z-Wave | In-process research and development |  |  |  |  |
Purchase price allocation |  |  |  |  |
Intangible assets | $ 20,900 |  |  |  |

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