EARNINGS (LOSS) PER SHARE ("EPS") (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Computation of Basic EPS:
Net loss	$ (124,120)	$ (12,491)	$ (186,034)	$ (123,329)
Weighted average shares outstanding - basic and diluted	88,822,000	85,396,000	87,907,000	85,197,000
Basic and Diluted EPS (in dollars per share)	$ (1.40)	$ (0.15)	$ (2.12)	$ (1.45)
Antidilutive shares
Common stock issued in connection with restricted stock awards (in shares)	6,758,000		7,772,000
Unvested restricted stock awards, canceled (in shares)	84,000		103,000
Unvested restricted stock
Antidilutive shares
Antidilutive shares excluded from calculation of EPS	13,488,000	6,821,000	13,488,000	6,821,000
4.375% convertible notes due 2014 ("4.375% Convertible Notes")
Antidilutive shares
Issuance of convertible notes, interest rate (as a percent)	4.375%		4.375%
Stock option awards
Antidilutive shares
Antidilutive shares excluded from calculation of EPS	2,009,000	2,009,000	2,009,000	2,009,000