Investments Equity Method Investments Table (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments [Abstract]
Income from equity investments, net, before amortization of basis difference	$ 57,950	$ 59,475	$ 109,873	$ 109,971
Amortization of basis difference	(13,644)	(13,562)	(27,315)	(27,124)
Income from equity investments, net	44,306	45,913	82,558	82,847
Cash distributions from equity investments	$ 36,258	$ 34,242	$ 125,604	$ 129,148