Investments Equity Method Investments Table (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments [Abstract]
Income from equity investments, net, before amortization of basis difference	$ 45,381	$ 50,549	$ 155,254	$ 160,520
Amortization of basis difference	(13,644)	(13,562)	(40,959)	(40,686)
Income from equity investments, net	31,737	36,987	114,295	119,834
Cash distributions from equity investments	$ 17,953	$ 31,954	$ 143,557	$ 161,102