Common Unit Repurchase and Retirement - Company's Repurchase Activities (Parenthetical) (Detail) - USD ($) shares in Millions, $ in Millions	1 Months Ended
	Dec. 30, 2021	Jan. 31, 2022	Aug. 31, 2020	Jul. 31, 2020
Capital Unit [Line Items]
Company's common units authorized for repurchase			6.0	2.0
Private Transaction
Capital Unit [Line Items]
Company's common units repurchased	0.4
Aggregate consideration paid for common units purchased	$ 4.4
Common Stock Available for Repurchase Under Open Market Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase			4.9
Common Stock Available for Repurchase Under Open Market Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units authorized for repurchase		1.6
Common Stock Available for Repurchase Under Privately Negotiated Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase			1.1
Common Stock Available for Repurchase Under Privately Negotiated Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units authorized for repurchase		0.3