Equity Investees (Consolidated Financial Statements Related To Equity Investees) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Genesis' share of operating earnings	$ 16,139	$ 21,403	$ 30,837	$ 39,663
Amortization of excess purchase price	(3,982)	(2,742)	(7,963)	(5,483)
Net equity in earnings	12,157	18,661	22,874	34,180
Distributions received	$ 23,298	$ 24,399	$ 44,629	$ 50,301