Basic and Diluted Net Income (Loss) Per Share - Performance based stock (Details) - $ / shares shares in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Antidilutive securities excluded from computation of earnings per share
Strike price of the warrants	$ 86.08
Dilutive securities excluded from computation of earnings per share	55,377	53,633
Class A common stock
Antidilutive securities excluded from computation of earnings per share
Strike price of the warrants	$ 0.01		$ 0.01
Anti-dilutive stock awards
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	1,778	1,845
Performance based options
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	6,318	4,386
Restricted Performance Units
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	1,252	1,373
Common stock warrants
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	46,029	46,029