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Income Taxes - Significant Components of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Deferred tax assets:      
Carry-forward losses and credits $ 50,673 $ 8,531  
Inventory and warranty reserves 24,253 15,404  
Accrued expenses and other reserves 16,176 2,343  
Stock-based compensation 8,995 3,713  
Executive supplemental retirement benefits 6,888 3,947  
Total deferred tax assets 106,985 33,938  
Deferred tax liabilities:      
Acquired intangible assets (127,571) (9,434)  
Depreciation and amortization (16,428) (1,724)  
Loan costs (7,282)    
Unrealized gain (3,195)    
Other (1,336) (57)  
Total deferred tax liabilities (155,812) (11,215)  
Valuation allowance (12,527) (6,127) $ (26,763)
Net deferred tax liabilities $ (61,354)    
Net deferred tax assets   $ 16,596