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Employee Benefit Plans and Stock-based Compensation - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 09, 2016
shares
Apr. 30, 2016
shares
Apr. 01, 2016
USD ($)
$ / shares
shares
Apr. 03, 2015
USD ($)
$ / shares
Dec. 31, 2015
Feb. 29, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in authorized shares for ESPP | shares     0      
Intrinsic value of options exercised       $ 1,300,000    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate     2.00%      
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax     $ 0      
Pension and Other Postretirement Benefit Contributions     0      
Defined Benefit Plan, Net Periodic Benefit Cost     $ 33,000      
Discretionary contributions of plan     25.00%      
Percent of employees' gross pay eligible for matching     4.00%      
Maximum contribution amount per participant     $ 1,000      
Contributions in period     130,000 $ 161,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     $ 12,300,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years      
Discount Percentage On Purchase Of Stock     15.00%      
Percentage of fair market value of Common Stock to purchase shares     85.00%      
Value Of Stock Purchase Right Percentage Of Put Option     15.00%      
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares     $ 0.97 $ 2.63    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value     $ 900,000 $ 1,300,000    
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options     0 120,000    
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 6,600,000 $ 6,100,000    
Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common Stock, Capital Shares Reserved for Future Issuance | shares     58,772      
TVN [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Business Combination Assumed Equity Benefit Plan     2     2
Fair Value of Employee Equity Benefit Plan Liabilities     $ 17,635,000      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate     2.00%      
TVN [Member] | Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in authorized shares for ESPP | shares     1,750,000      
Scenario, Forecast [Member] | Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in authorized shares for ESPP | shares   1,500,000        
Accrued Liabilities [Member] | TVN [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fair Value of Employee Equity Benefit Plan Liabilities     $ 2,400,000      
Stock Plan 1995 [Member] | Scenario, Forecast [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in authorized shares for ESPP | shares 2,000,000          
Purchase Period June 30, 2016 [Member] | Scenario, Forecast [Member] | Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in authorized shares for ESPP | shares 1,500,000          
Euro Zone AA Rated [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Long-term Euro zone AA rated, Term         10 years  
Long-term Euro zone AA rated 10 years corporate bonds yield         2.00%