Equity Investments (Equity Investment Income Statement Disclosure) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Gross revenue	$ 130,134	$ 220,013	$ 263,690	$ 378,294
Net (loss) income	$ (45,246)	$ 26,099	$ 45,422	$ 207,604