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Earnings (Loss) Per Common Share - Additional Information (Detail) (Convertible Debt Securities)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Convertible Debt Securities
   
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Anti-dilutive securities excluded from computation of earnings per share 1,232,880us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_ConvertibleDebtSecuritiesMember
1,261,913us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_ConvertibleDebtSecuritiesMember