Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net Income (Loss)	$ (26,576)	$ (35,689)
Denominator:
Weighted-average common shares outstanding, Basic (in shares)	109,692	109,358
Effect of potential dilutive common shares	0	0
Denominator:
Weighted-average common shares outstanding, Diluted (in shares)	109,692	109,358
Earnings Per Share, Basic	$ (0.24)	$ (0.33)
Earnings Per Share, Diluted	$ (0.24)	$ (0.33)