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Total Capital and Net Income Per Unit - Additional Information (Detail) - $ / shares
12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Capital Unit [Line Items]    
Days after year-end where limited partner's have right to receive cash distribution 45 days  
Minimum percentage of holding by unitholders to remove general partner 66.67%  
Minimum [Member] | Common Stock [Member]    
Capital Unit [Line Items]    
Cash distribution per unit   $ 0.4625
Maximum [Member] | Common Stock [Member]    
Capital Unit [Line Items]    
Cash distribution per unit $ 0.4625