Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
NET INCOME/(LOSS)	$ 47,670	$ (70,140)	$ (146,110)	$ (186,871)
NET INCOME/(LOSS) PER SHARE:
Basic (in Dollars per share)	$ 0.38	$ (0.56)	$ (1.16)	$ (1.49)
Diluted (in Dollars per share)	$ 0.38	$ (0.56)	$ (1.16)	$ (1.49)
SHARES USED IN COMPUTING NET INCOME/(LOSS) PER SHARE:
Weighted average basic shares outstanding (in Shares)	126,144	125,462	125,920	125,346
Dilutive securities:
Total dilutive securities (in Shares)	682	0		0
Weighted average diluted shares outstanding (in Shares)	126,826	125,462	125,920	125,346
Stock option
Dilutive securities:
Stock option and unvested RSUs and PSUs (in Shares)	0	0	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)	5,201	3,603	4,690	3,823
Unvested RSUs and PSUs
Dilutive securities:
Stock option and unvested RSUs and PSUs (in Shares)	682	0	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)	1,901	1,831	2,090	761