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Stock-Based Compensation - Summary of Options Outstanding and Exercisable (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Exercise Price $ 16.04  
Number of options outstanding and exercisable shares 35,500 75,500
Options outstanding Weighted Average Remaining Contractual Term 1 year