SHARE-BASED COMPENSATION (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2011 Component Y Multiple Segment
SHARE-BASED COMPENSATION:
Aggregate number of shares reserved for issuance under equity compensation plans since the inception of such plans (in shares)	38,200,000
Shares available for future grants (in shares)	5,300,000
Per-share weighted-average fair value of the stock options granted (in dollars per share)	$ 6.40
Weighted-average fair value assumptions
Pricing model used for valuation of options	Customized binomial lattice approach
Dividend yield (as a percent)	0.00%
Risk-free interest rate (as a percent)	2.40%
Expected option life (in years)	6.0
Expected volatility (as a percent)	46.00%
Suboptimal exercise multiple	1.9
Option Activity - Number of Shares
Outstanding at the beginning of the period (in shares)	9,526,989
Granted (in shares)	500,576
Exercised (in shares)	(208,507)
Forfeited or cancelled (in shares)	(771,616)
Outstanding at the end of the period (in shares)	9,047,442
Exercisable at the end of the period (in shares)	8,144,840
Weighted-average exercise price per share
Outstanding at the beginning of the period (in dollars per share)	$ 20.75
Granted (in dollars per share)	$ 13.74
Exercised (in dollars per share)	$ 10.31
Forfeited or cancelled (in dollars per share)	$ 20.49
Outstanding at the end of the period (in dollars per share)	$ 20.63
Exercisable at the end of the period (in dollars per share)	$ 21.35
Weighted-average remaining contractual term (in years)
Outstanding at the end of the period (in years)	4.44
Exercisable at the end of the period (in years)	3.98
Aggregate intrinsic value (in thousands)
Exercised	$ 165
Outstanding at the end of the period	530
Exercisable at the end of the period	$ 338