(Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss)	$ (82,181)	$ (28,747)
Net (loss) per share:
Basic (in Dollars per share)	$ (0.65)	$ (0.23)
Diluted (in Dollars per share)	$ (0.65)	$ (0.23)
Shares used in computing net (loss) per share:
Weighted average basic shares outstanding (in Shares)	125,566	125,240
Dilutive securities:
Total dilutive securities (in Shares)		0
Weighted average diluted shares outstanding (in Shares)	125,566	125,240
Stock option
Dilutive securities:
Stock option and unvested RSUs (in Shares)	0	0
Shares subject to stock options, unvested RSUs and PSUs omitted from the calculation of (loss) per share as their effect would have been anti-dilutive (in Shares)	3,917	3,287
Unvested RSUs and PSUs
Dilutive securities:
Stock option and unvested RSUs (in Shares)	0	0
Shares subject to stock options, unvested RSUs and PSUs omitted from the calculation of (loss) per share as their effect would have been anti-dilutive (in Shares)	4,423	70