Common Unit Repurchase and Retirement - Additional Information (Detail) - USD ($) shares in Thousands		1 Months Ended				3 Months Ended		98 Months Ended	99 Months Ended
	Dec. 04, 2019	Jan. 31, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Aug. 31, 2020	Sep. 30, 2020	Jul. 31, 2020
Capital Unit [Line Items]
Company's common units authorized for repurchase								6,000		2,000
Fifth Amendment
Capital Unit [Line Items]
Availability required to repurchase common units	$ 45,000,000
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	$ 300,000,000
Minimum fixed charge coverage ratio for distributions to unit holders or to repurchase common units	115.00%
Repurchase Plan
Capital Unit [Line Items]
Company's common units repurchased and retired			730	1,553	308		2,591	14,400	17,697
Repurchase Plan | Subsequent Event
Capital Unit [Line Items]
Company's common units repurchased and retired		429
Common Stock Available for Repurchase Under Privately Negotiated Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase								1,100
Common Stock Available for Repurchase Under Privately Negotiated Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units authorized for repurchase		500
Common Stock Available for Repurchase Under Open Market Transactions
Capital Unit [Line Items]
Company's common units authorized for repurchase								4,900
Common Stock Available for Repurchase Under Open Market Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units authorized for repurchase		3,600
Common Stock Repurchase Under Open Market Transactions
Capital Unit [Line Items]
Company's common units repurchased and retired						800
Common Stock Repurchase Under Open Market Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units repurchased and retired		300
Common Stock Repurchase Under Private Transactions
Capital Unit [Line Items]
Company's common units repurchased and retired						400
Common Stock Repurchase Under Private Transactions | Subsequent Event
Capital Unit [Line Items]
Company's common units repurchased and retired		100