Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands			1 Months Ended				3 Months Ended	98 Months Ended	108 Months Ended
		Jan. 25, 2022	Jan. 31, 2022	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Dec. 31, 2021	Aug. 31, 2020	Sep. 30, 2021	Dec. 04, 2019
Repurchase Plan
Subsequent Event [Line Items]
Company's common units repurchased and retired				670	161	273	1,104	14,400	21,979
Average price paid per unit	[1]			$ 10.56	$ 10.99	$ 10.67	$ 10.65		$ 8.60
Credit Agreement
Subsequent Event [Line Items]
Non Seasonal maximum borrowing capacity under revolving credit facility										$ 300,000,000
Subsequent Event | Repurchase Plan
Subsequent Event [Line Items]
Company's common units repurchased and retired			264
Average price paid per unit	[1]		$ 10.59
Subsequent Event | Dividend Declared
Subsequent Event [Line Items]
Distribution declared			0.1425
Partners capital projected distribution amount on annualized basis			0.57
Minimum dividend distribution per unit			$ 0.0675
Amount to paid to common unit holders			$ 5,400,000
Amount to paid to the General Partner			300,000
Incentive distribution to the General Partner			200,000
Incentive distributions to management			$ 200,000
Dividend paid date			Feb. 01, 2022
Dividend record date			Jan. 24, 2022
Subsequent Event | Credit Agreement
Subsequent Event [Line Items]
Increase in revolving credit facility		$ 50,000,000
Non Seasonal maximum borrowing capacity under revolving credit facility		$ 350,000,000

[1] Amount includes repurchase costs.