Partners' Capital (Cash Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May. 16, 2016	Feb. 16, 2016	Mar. 31, 2016	Mar. 31, 2015
Distribution Made To Limited Partner [Line Items]
Per Unit Distribution		$ 0.8013
Total Cash Distribution		$ 70,006	$ 86,538	$ 21,974
Subordinated Units-Affiliated [Member]
Distribution Made To Limited Partner [Line Items]
Total Cash Distribution		$ 16,532
Subsequent Event [Member]
Distribution Made To Limited Partner [Line Items]
Per Unit Distribution	$ 0.8173
Total Cash Distribution	$ 77,921
Subsequent Event [Member] | Subordinated Units-Affiliated [Member]
Distribution Made To Limited Partner [Line Items]
Total Cash Distribution	$ 19,566