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Nature of Business and Significant Accounting Policies (Details) (USD $)
6 Months Ended
Jun. 30, 2013
class
Jun. 30, 2012
Nature of Business and Significant Accounting Policies    
Assets allocated to GP 5, GP 6, GP 10 or GP 11 $ 0  
Classes of interests    
Number of classes of limited partner interests 7  
Income taxes    
Income taxes 0  
Uncertain income tax positions 0  
Statement of cash flows    
Debt carried by partners $ 0 $ 0