Equity Investees (Consolidated Financial Statements Related To Equity Investees) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Genesis' share of operating earnings	$ 17,944	$ 17,600	$ 57,607	$ 35,506
Amortization of excess purchase price	(3,684)	(2,583)	(9,167)	(7,749)
Net equity in earnings	14,260	15,017	48,440	27,757
Distributions received	$ 23,522	$ 21,758	$ 73,823	$ 49,383