Partners' Capital (Incentive Distribution Rights) (Details)	6 Months Ended
	Jun. 30, 2020 $ / shares
Minimum Quarterly Distribution [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	$ 0.4375
First Target Distribution [Member] | Minimum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.4375
First Target Distribution [Member] | Maximum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.5031250
Second Target Distribution [Member] | Minimum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.503125
Second Target Distribution [Member] | Maximum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.546875
Third Target Distribution [Member] | Minimum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.546875
Third Target Distribution [Member] | Maximum [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	0.656250
Distributions Thereafter [Member]
Distribution Made To Managing Member Or General Partner [Line Items]
Total quarterly distribution per common unit target amount (in dollars per share)	$ 0.656250