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Debt (Detail) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Credit Facility $ 0 $ 1,129,478,741
Term loan 1,129,478,741 0
Payment In Kind Loan 707,688 0
Less: Current portion 0 (32,094,006)
Long-term debt $ 1,130,186,429 $ 1,097,384,735