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Basic and Diluted Earnings Per Share - Additional Information (Detail)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Anti-dilutive common shares excluded from calculation of diluted loss per share 194us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 298us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount