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Earnings Per Share - Additional Information (Detail) (Stock Options and Restricted Stock [Member])
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Stock Options and Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options and restricted stock excluded from the computation of diluted earnings per share 182,391 482,716