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Subsequent Events - Components and Allocation of Purchase Price (Detail) - USD ($)
$ in Thousands
Aug. 01, 2017
Jun. 30, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Goodwill   $ 60,979 $ 59,548
Spectrum Inc. | Subsequent Event      
Business Acquisition [Line Items]      
Cash and cash equivalents $ 7,071    
Marketable securities 990    
Accounts receivable 5,950    
Inventory 11,349    
Prepaid expenses and other current assets 891    
Fixed assets 5,613    
Other assets 988    
Goodwill 276,241    
Accounts payable (1,287)    
Accrued liabilities (2,248)    
Deferred tax liabilities, net (42,629)    
Unrecognized tax benefit (576)    
Estimated closing indebtedness (2,635)    
Estimated transaction costs (1,976)    
Net assets acquired 371,812    
Spectrum Inc. | Customer relationships | Subsequent Event      
Business Acquisition [Line Items]      
Business combination, intangible assets 73,530    
Spectrum Inc. | Technology - developed | Subsequent Event      
Business Acquisition [Line Items]      
Business combination, intangible assets 37,630    
Spectrum Inc. | Trademark | Subsequent Event      
Business Acquisition [Line Items]      
Business combination, intangible assets 2,140    
Spectrum Inc. | Non-competition agreements | Subsequent Event      
Business Acquisition [Line Items]      
Business combination, intangible assets $ 770