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Stock Incentive Plans - Summary of Stock-Based Compensation Expense Related to Stock Option and Restricted Stock Unit Awards (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Service Share Based Compensation Aggregate Disclosures [Abstract]      
Stock-based compensation expense included in selling, general and administrative expenses $ 1,016 $ 695 $ 473
Deferred income taxes 404 272 188
Stock-based compensation expense related to stock options and restricted stock units, net of tax $ 612 $ 423 $ 285