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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