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Fair Value Disclosures - Additional Information (Detail) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Fair Value Disclosures [Abstract]    
Fair value adjustments to financial and nonfinancial assets $ 0 $ 0
Fair value adjustments to financial and nonfinancial liabilities $ 0 $ 0