Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Excess tax (deficiency) benefit from equity-based compensation	$ (470)	$ 8,850	$ 1,871
Prepaid income taxes	$ 0	$ 72,278