Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Reconciliation and Income Statement Classification of Gains and Losses for All Assets and Liabilities (Parenthetical) (Detail)

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Fair Value Measurements - Reconciliation and Income Statement Classification of Gains and Losses for All Assets and Liabilities (Parenthetical) (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Jul. 27, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Exercise price of stock warrants 9.60 9.60
Class of warrant or rights date from which warrants or rights expiration date Oct. 14, 2015  
Municipal bonds-tax exempt [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Par value of bond $ 700,000  
Amortized value $ 699,000  
Useful remaining life intangible assets 11 months 27 days