Earnings Per Unit (Schedule of Calculation of Earnings Per Limited Partner Unit - Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Unit [Line Items]
Distributions declared	$ 10,547	$ 2,842
Earnings less than distributions	(197)
Total net income	10,350	10,727
General Partner [Member]
Earnings Per Unit [Line Items]
Distributions declared	211	57
Earnings less than distributions	(4)
Total net income	207	215
Common Units [Member] | Limited Partners [Member]
Earnings Per Unit [Line Items]
Distributions declared	10,336	2,785
Earnings less than distributions	(193)
Earnings in excess of distributions		7,727
Total net income	$ 10,143	$ 10,512
Common units	23,208	23,161
Earnings per limited partner unit - basic and diluted	$ 0.44	$ 0.45