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Financial Instruments	12 Months Ended
Financial Instruments	Dec. 31, 2011
Financial Instruments [Abstract]
Financial Instruments	8. Financial Instruments Except for cash, the fair value of which equals its carrying value, the only significant financial instruments the Company has are its investments in unconsolidated investees accounted for on the equity method for which fair value disclosure is not required and amounts due to and from members. There is no formal agreement between the Company and its members related to the amounts due to and from the members, including no stated right of offset, repayment terms, and interest rate or method. Accordingly, it is not practical to estimate the fair value of such financial instruments.