Equity Investees (Consolidated Financial Statements Related To Equity Investees) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Genesis' share of operating earnings	$ 16,444	$ 17,944	$ 47,281	$ 57,607
Amortization of excess purchase price	(3,956)	(3,684)	(11,919)	(9,167)
Net equity in earnings	12,488	14,260	35,362	48,440
Distributions received	$ 21,551	$ 23,522	$ 66,180	$ 73,823