Income Taxes - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Excess tax benefits from equity-based compensation	$ 1,871	$ 8,850	$ 1,871	$ 1,927
Prepaid income taxes		$ 72,278	$ 0