SHARE-BASED COMPENSATION (Details 7) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Share-based compensation
Shares issued	15,000		19,000
Average exercise price of options issued ( in dollars per share)	$ 11.11		$ 6.57
Shares available for grants	34,600,000
Expected Dividend (as a percent)	0.00%	0.00%	0.00%
Stock-based compensation	$ 50,270,000	$ 40,439,000	$ 34,529,000
option activity
Outstanding, beginning of fiscal year, Options (in shares)	23,612,872	34,405,564	43,933,660
Granted (in shares)	15,000		19,000
Exercised, Options (in shares)	(3,600,900)	(6,572,383)	(5,398,331)
Forfeited, Options (in shares)	(4,034,078)	(4,220,309)	(4,148,765)
Outstanding, end of fiscal year, Options (in shares)	15,992,894	23,612,872	34,405,564
Outstanding, beginning of fiscal year, Price (in dollars per share)	$ 8.57	$ 8.29	$ 7.78
Granted, Price (in dollars per share)	$ 11.11		$ 6.57
Exercised, Price (in dollars per share)	$ 6.53	$ 4.28	$ 4.12
Forfeited, Price (in dollars per share)	$ 13.17	$ 12.93	$ 8.32
Outstanding, end of fiscal year, Price (in dollars per share)	$ 7.81	$ 8.57	$ 8.29
Weighted average assumptions
Expected Dividend (as a percent)	0.00%	0.00%	0.00%
Elementum
Share-based compensation
Unrecognized compensation expenses will be recognized over a weighted average period	3 years 3 months 15 days
Options
Share-based compensation
Shares issued		0
Weighted average fair value (in dollars per share)	$ 4.85		$ 2.48
Vesting period	4 years
Expiration period of options issued	7 years		7 years
Expected Dividend (as a percent)	0.00%		0.00%
option activity
Granted (in shares)		0
Weighted average assumptions
Expected term	6 years 3 months 18 days		4 years 1 month 6 days
Expected volatility (as a percentage)	46.90%		46.90%
Expected Dividend (as a percent)	0.00%		0.00%
Risk-free interest rate (as a percentage)	2.30%		0.90%
Options | Elementum
Share-based compensation
Vesting period	4 years
Expiration period of options issued	10 years
Shares available for grants	5,000,000
Total unrecognized compensation expenses	$ 2,100,000
option activity
Outstanding, end of fiscal year, Options (in shares)	16,000,000
Outstanding, end of fiscal year, Price (in dollars per share)	$ 0.27