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Common Unit Repurchase and Retirement - Additional Information (Detail) - USD ($)
shares in Thousands
1 Months Ended 3 Months Ended 84 Months Ended 91 Months Ended
Jul. 02, 2018
Apr. 30, 2020
Mar. 31, 2020
Feb. 29, 2020
Jan. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jan. 31, 2020
Dec. 04, 2019
Capital Unit [Line Items]                    
Company's common units authorized for repurchase       1,100 100       100  
Fifth Amendment                    
Capital Unit [Line Items]                    
Availability required to repurchase common units $ 45,000,000                  
Percentage of the maximum facility size on a historical proforma and forward-looking basis 15.00%                  
Non Seasonal maximum borrowing capacity under revolving credit facility $ 300,000,000                 $ 300,000,000
Minimum fixed charge coverage ratio for distributions to unit holders or to repurchase common units 115.00%                  
Repurchase Plan                    
Capital Unit [Line Items]                    
Company's common units repurchased and retired     500 122 160 782 1,281 13,340 11,800  
Repurchase Plan | Subsequent Event                    
Capital Unit [Line Items]                    
Company's common units repurchased and retired   424                
Common Stock Available for Repurchase Under Privately Negotiated Transactions                    
Capital Unit [Line Items]                    
Company's common units authorized for repurchase   100   100            
Common Stock Available for Repurchase Under Open Market Transactions                    
Capital Unit [Line Items]                    
Company's common units authorized for repurchase       1,000            
Common Stock Repurchase Under Open Market Transactions                    
Capital Unit [Line Items]                    
Company's common units repurchased and retired           800