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Reconciliation of Net Income Per Share - Additional Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]      
Anti-dilutive options 1,148 1,187 792
Anti-dilutive securities excluded from computation of earnings per share minimum price range $ 8.54 $ 8.54 $ 11.50
Anti-dilutive securities excluded from computation of earnings per share maximum price range one $ 14.13 $ 14.13 $ 14.13