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Share-Based Compensation Plans - Summary of Share-Based Compensation Expense (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]      
Share-based compensation expense $ 3,060 $ 3,048 $ 1,461
Cost of Sales [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense 662 432 143
Selling, General and Administrative Expenses [Member]
     
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Share-based compensation expense $ 2,398 $ 2,616 $ 1,318