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Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 1 Months Ended 3 Months Ended 98 Months Ended 108 Months Ended
Apr. 30, 2022
Mar. 31, 2022
Feb. 28, 2022
Jan. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Aug. 31, 2020
Sep. 30, 2021
Repurchase Plan                
Subsequent Event [Line Items]                
Company's common units repurchased and retired   398 330 264 992 1,104 14,400 21,979
Average price paid per unit [1]   $ 10.58 $ 10.34 $ 10.59 $ 10.50 $ 10.65   $ 8.60
Subsequent Event | Repurchase Plan                
Subsequent Event [Line Items]                
Company's common units repurchased and retired 165              
Average price paid per unit [1] $ 11.10              
Subsequent Event | Dividend Declared                
Subsequent Event [Line Items]                
Distribution declared 0.1525              
Partners capital projected distribution amount on annualized basis 0.61              
Minimum dividend distribution per unit $ 0.0675              
Amount to paid to common unit holders $ 5.6              
Amount to paid to the General Partner 0.3              
Incentive distribution to the General Partner 0.3              
Incentive distributions to management $ 0.3              
Dividend paid date May 03, 2022              
Dividend record date Apr. 25, 2022              
Subsequent Event | Heating Oil Dealers                
Subsequent Event [Line Items]                
Aggregate purchase price partnership acquired $ 8.1              
Cash paid 6.5              
Deferred liabilities 1.6              
Aggregate purchase price allocation, intangible assets 5.6              
Aggregate purchase price allocation, fixed assets 2.4              
Aggregate purchase price allocation, working capital $ 0.1              
[1] Amount includes repurchase costs.