SUBSEQUENT EVENTS (Details) - Common Unit - USD ($)	Oct. 29, 2020	Jul. 31, 2020	Apr. 30, 2020	Feb. 13, 2020	Oct. 31, 2019
Subsequent Event [Line Items]
Partners' capital, cash distribution (in USD per common unit)		$ 0.29	$ 0.29	$ 0.29	$ 0.34
Subsequent Event
Subsequent Event [Line Items]
Partners' capital, cash distribution (in USD per common unit)	$ 0.20
Stock repurchase program, authorized amount	$ 100,000,000