Common Unit Repurchase Plans and Retirement - Additional Information (Detail) - USD ($)				1 Months Ended						2 Months Ended	3 Months Ended					12 Months Ended	131 Months Ended	144 Months Ended
	Sep. 30, 2025	Jul. 31, 2025	Sep. 27, 2024	Nov. 30, 2025		Oct. 31, 2025	[3]	Sep. 30, 2025	Aug. 31, 2025	Nov. 30, 2025	Sep. 30, 2025	Jun. 30, 2025	[1]	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2025	May 31, 2023	Sep. 30, 2024	Jul. 31, 2022
Capital Unit [Line Items]
Company's common units authorized for repurchase																	2,600,000		1,100,000
Seventh Amendment
Capital Unit [Line Items]
Availability required to repurchase common units	$ 25,700		$ 40,000
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			$ 400,000,000
Minimum fixed charge coverage ratio for distributions to unit holders or to repurchase common units			1.15%
Repurchase Plan
Capital Unit [Line Items]
Company's common units repurchased and retired		144,000						157,000	172,000		473,000	817,000		6,000	13,000	1,309,000	20,500,000	26,438,000
Repurchase Plan | Subsequent Event [Member]
Capital Unit [Line Items]
Company's common units repurchased and retired				67,000	[2]	234,000				300,000
Common Stock Available for Repurchase Under Privately Negotiated Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase																	300,000
Common Stock Available for Repurchase Under Privately Negotiated Transactions | Subsequent Event [Member]
Capital Unit [Line Items]
Company's common units authorized for repurchase				100,000						100,000
Common Stock Available for Repurchase Under Open Market Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase																	2,300,000
Common Stock Available for Repurchase Under Open Market Transactions | Subsequent Event [Member]
Capital Unit [Line Items]
Company's common units authorized for repurchase				500,000						500,000

[1] In May 2025, the Company purchased 700,000 Common Units in a private transaction for aggregate consideration of approximately $8.4 million. The purchase was made outside the Company’s unit repurchase plan.

[2] Of the total available for repurchase, approximately 0.5 million are available for repurchase in open market transactions and 0.1 million are available for repurchase in privately-negotiated transactions.

[3] In October 2025, the Company purchased 138,600 Common Units in a private transaction for aggregate consideration of approximately $1.6 million. The purchase was made within the Company’s unit repurchase plan.