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Stock-Based Compensation - Pre-Tax Effect Within Consolidated Statements of Operations of Recording Stock-Based Compensation (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total pre-tax stock-based compensation expense $ 13,992 $ 13,031 $ 11,225
Cost of Sales [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total pre-tax stock-based compensation expense 2,038 1,867 1,511
Research and Development Expense [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total pre-tax stock-based compensation expense 1,902 2,278 2,197
Selling, General and Administrative Expenses [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total pre-tax stock-based compensation expense $ 10,052 $ 8,886 $ 7,517