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						9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Line Items]
Net income (loss)	$ (24,472)	$ (36,404)	$ (3,605)	$ 2,196	$ (42,622)	$ (58,694)	$ (64,480)	$ (99,120)
Weighted average common shares outstanding	311,386,852			304,547,891			310,450,917	304,104,388
Minimum shares issuable under purchase contracts	12,994,501			16,465,704			13,217,426	16,465,704
Total weighted average shares outstanding	324,381,353			321,013,595			323,668,343	320,570,092
Basic net income (loss) per share	$ (0.08)			$ 0.01			$ (0.20)	$ (0.31)
Diluted net income per share:
Net income (loss)	$ (24,472)	$ (36,404)	$ (3,605)	$ 2,196	$ (42,622)	$ (58,694)	$ (64,480)	$ (99,120)
Number of shares used in basic computation	324,381,353			321,013,595			323,668,343	320,570,092
Total weighted average shares outstanding	324,381,353			324,815,524			323,668,343	320,570,092
Diluted net income (loss) per share	$ (0.08)			$ 0.01			$ (0.20)	$ (0.31)
Time-Vesting Options [Member]
Diluted net income per share:
Weighted average effect of dilutive securities				932,344
Restricted Stock Units [Member]
Diluted net income per share:
Weighted average effect of dilutive securities				2,753,810
Deferred Stock Units [Member]
Diluted net income per share:
Weighted average effect of dilutive securities				95,624
Employee Stock Purchase Program Shares [Member]
Diluted net income per share:
Weighted average effect of dilutive securities				20,151