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Net Income Per Limited Partner Unit (Details 2) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Basic and Diluted Net Income per Limited Partner Unit    
Basic net income per limited partner unit impact (in dollars per unit) $ (0.05) $ (0.34)
Diluted net income per limited partner unit impact (in dollars per unit) $ (0.05) $ (0.34)