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Earnings (Loss) Per Share - Additional Information (Detail)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Number of common stock excluded from calculation of diluted EPS   0.8
Employee Stock Option [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Number of common stock excluded from calculation of diluted EPS 0.2 0.9