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Stock Purchase - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Equity [Line Items]  
Repurchased shares of common stock 61,500
Repurchased common stock value $ 973
Former Director [Member]
 
Equity [Line Items]  
Repurchased common stock value $ 1,000