v3.26.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 156 Months Ended 164 Months Ended
Jul. 01, 2026
Jul. 31, 2026
Jun. 30, 2026
May 31, 2026
Apr. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
[1]
Dec. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Feb. 28, 2026
Repurchase Plan                        
Subsequent Event [Line Items]                        
Company's common units repurchased and retired     13 5 5 23 61 378     27,747 22,600
Average price paid per unit [2]     $ 12.44 $ 12.47 $ 12.49 $ 12.46 $ 12.29 $ 11.87     $ 9.05  
Heating Oil Businesses                        
Subsequent Event [Line Items]                        
Aggregate purchase price partnership acquired                 $ 1.0 $ 80.5    
Subsequent Event                        
Subsequent Event [Line Items]                        
Aggregate purchase price partnership acquired $ 2.0                      
Subsequent Event | Repurchase Plan                        
Subsequent Event [Line Items]                        
Company's common units repurchased and retired   5                    
Average price paid per unit [2]   $ 12.51                    
Subsequent Event | Dividend Declared                        
Subsequent Event [Line Items]                        
Distribution declared   0.1975                    
Partners capital projected distribution amount on annualized basis   0.79                    
Minimum dividend distribution per unit   $ 0.0675                    
Amount to paid to common unit holders   $ 6.5                    
Amount to paid to the General Partner   0.5                    
Incentive distribution to the General Partner   0.4                    
Incentive distributions to management   $ 0.4                    
Dividend paid date   Aug. 05, 2026                    
Dividend record date   Jul. 27, 2026                    
[1] In February 2026, the Board authorized an increase in the number of Common Units available for repurchase in open market transactions from 0.4 million to 2.0 million.
[2] Amount includes repurchase costs.