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Common Unit Repurchase and Retirement - Company's Repurchase Activities (Detail) - $ / shares
 3 Months Ended 120 Months Ended 131 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
May 31, 2023
Jul. 31, 2023
Jun. 30, 2023
 [2]
Repurchase Plan            
Capital Unit [Line Items]            
Total Number of Units Purchased 78,000 411,000 24,933,000 20,500,000    
Average Price Paid per Unit [1] $ 11.2 $ 8.77 $ 8.82      
Maximum Number of Units that May Yet Be Purchased 1,068,000 1,146,000 1,557,000     2,568,000
Repurchase Plan | Subsequent Event            
Capital Unit [Line Items]            
Maximum Number of Units that May Yet Be Purchased [3]         2,568,000  
Publicly Announced Plans or Programs As Part of Repurchase Plan            
Capital Unit [Line Items]            
Total Number of Units Purchased 78,000 411,000 20,045,000      
[1] Amount includes repurchase costs.
[2] In May 2023, the Board authorized an increase in the number of Common Units available for repurchase in open market transactions from 0.8 million to 2.3 million.
[3] Of the total available for repurchase, approximately 2.3 million units are available for repurchase in open market transactions and 0.3 million units are available for repurchase in privately-negotiated transactions, under the Repurchase Plan.