Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Income Taxes (Textual) [Abstract]    
Valuation allowance $ 137,348,000 $ 99,597,000
Increase in deferred tax assets, tax credit carryforwards, foreign $ 28,000,000