Common Unit Repurchase and Retirement - Company's Repurchase Activities (Detail) - $ / shares shares in Thousands		1 Months Ended					3 Months Ended		131 Months Ended	144 Months Ended
		Apr. 30, 2025	Mar. 31, 2025	Feb. 28, 2025	Jan. 31, 2025		Mar. 31, 2025	Dec. 31, 2024	May 31, 2023	Sep. 30, 2024
Repurchase Plan
Capital Unit [Line Items]
Total Number of Units Purchased			0	0	6		6	13	20,500	26,438
Average Price Paid per Unit	[1]		$ 0	$ 0	$ 11.24		$ 11.24	$ 11.2		$ 8.9
Maximum Number of Units that May Yet Be Purchased			1,533	1,533	1,533	[2]	1,533	1,539		1,552
Repurchase Plan | Subsequent Event
Capital Unit [Line Items]
Total Number of Units Purchased		1
Average Price Paid per Unit	[1]	$ 12.03
Maximum Number of Units that May Yet Be Purchased	[2]	1,532
Publicly Announced Plans or Programs As Part of Repurchase Plan
Capital Unit [Line Items]
Total Number of Units Purchased			0	0	6		6	13		21,550
Publicly Announced Plans or Programs As Part of Repurchase Plan | Subsequent Event
Capital Unit [Line Items]
Total Number of Units Purchased		1

[1] Amount includes repurchase costs.

[2] Of the total available for repurchase, approximately 1.2 million units are available for repurchase in open market transactions and approximately 0.3 million units are available for repurchase in privately-negotiated transactions, under the Repurchase Plan.