Net Income (Loss) Per Share (Computation of Basic Net Income (Loss) Per Share of Common Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Per Share [Abstract]
Net income (loss)	$ (37,517)	$ (17,501)
Weighted average common shares outstanding	75,474,654	75,604,775
Basic net income (loss) per share	$ (0.50)	$ (0.23)