Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity-based compensation expense	$ 23,203	$ 37,515	$ 6,527
Operating Expense [Member]
Equity-based compensation expense	7,049	11,033	863
Selling, General and Administrative Expenses [Member]
Equity-based compensation expense	$ 16,154	$ 26,482	$ 5,664