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Related Party Transactions - Additional Information (Details) - Common Units - shares
1 Months Ended 3 Months Ended
Mar. 31, 2017
Mar. 31, 2017
Related Party Transaction [Line Items]    
Sale of common units (units)   54,119,893
Continuous Offering Program    
Related Party Transaction [Line Items]    
Sale of common units (units)   4,033,567
Continuous Offering Program | AAP    
Related Party Transaction [Line Items]    
Sale of common units (units)   1,800,000
Underwritten Offering | AAP    
Related Party Transaction [Line Items]    
Sale of common units (units) 48,300,000