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Stock-Based Compensation - Additional Information Related to the Stock Option Plan (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Intrinsic value of options exercised $ 99 $ 114 $ 151
Cash received from option exercises $ 698 $ 424 $ 259