Basic and Diluted Net Income (Loss) Per Share - Performance based stock (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
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	56,466	55,327
Anti-dilutive stock awards
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	3,572	1,491
Performance based options
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	4,804	6,489
Restricted Performance Units
Antidilutive securities excluded from computation of earnings per share
Dilutive securities excluded from computation of earnings per share	2,061	1,318
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