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Subsequent Events - Additional Information (Detail) - USD ($)
Aug. 04, 2016
Jul. 25, 2016
May 28, 2013
7.875% notes, due 2021 | Senior Notes      
Subsequent Event [Line Items]      
Debt premium percentage     7.875%
Subsequent Event      
Subsequent Event [Line Items]      
Quarterly cash distribution per common unit   $ 0.66  
Distribution payable date   Aug. 12, 2016  
Distribution record date   Aug. 05, 2016  
Subsequent Event | Unsecured Debt      
Subsequent Event [Line Items]      
Debt instrument maturity date Dec. 01, 2020    
Subsequent Event | New Credit Agreement | Maximum      
Subsequent Event [Line Items]      
credit facility maturity period Aug. 04, 2021    
Subsequent Event | 7.875% notes, due 2021 | Senior Notes      
Subsequent Event [Line Items]      
Debt instrument maturity date Jun. 01, 2021    
Debt premium percentage 7.875%    
Subsequent Event | Prior Credit Agreement      
Subsequent Event [Line Items]      
Extinguishment of debt charge $ 1,200,000    
Subsequent Event | Revolving Credit Facility | New Credit Agreement      
Subsequent Event [Line Items]      
Credit facility, maximum borrowing capacity 210,000,000    
Subsequent Event | Revolving Credit Facility | New Credit Agreement | Minimum      
Subsequent Event [Line Items]      
Line of credit, additional borrowing capacity 5,000,000    
Subsequent Event | Revolving Credit Facility | New Credit Agreement | Maximum      
Subsequent Event [Line Items]      
Line of credit, additional borrowing capacity 100,000,000    
Subsequent Event | Letter of Credit | New Credit Agreement      
Subsequent Event [Line Items]      
Credit facility, maximum borrowing capacity $ 15,000,000