Partnership Distributions - Narrative (Details) - $ / shares		3 Months Ended						9 Months Ended
	Oct. 20, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020
Distribution Made to Limited Partner
Partner distribution period								45 days
Distribution (in dollars per share)		$ 0.1875	$ 0.1875	$ 0.6878	$ 0.6418	$ 0.6132	$ 0.5858
Common Units | Subsequent event
Distribution Made to Limited Partner
Distribution (in dollars per share)	$ 0.1875