STOCK-BASED COMPENSATION (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended						0 Months Ended	12 Months Ended																	0 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended					12 Months Ended					1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2014 General and administrative	Mar. 31, 2013 General and administrative	Mar. 31, 2012 General and administrative	Feb. 18, 2014 ZelnickMedia	Mar. 31, 2014 ZelnickMedia	Mar. 31, 2013 ZelnickMedia	Mar. 31, 2012 ZelnickMedia	Mar. 31, 2014 Restricted Stock	Mar. 31, 2014 Market-based restricted shares	Mar. 31, 2013 Market-based restricted shares	Mar. 31, 2012 Market-based restricted shares	Mar. 31, 2012 Market-based restricted shares ZelnickMedia	Mar. 31, 2014 Employee Market-Based	Mar. 31, 2013 Employee Market-Based	Mar. 31, 2012 Employee Market-Based	Mar. 31, 2014 Non-Employee Market-Based	Mar. 31, 2013 Non-Employee Market-Based	Mar. 31, 2012 Non-Employee Market-Based	Mar. 31, 2014 Stock Options	Mar. 31, 2013 Stock Options	Mar. 31, 2012 Stock Options	Feb. 18, 2014 Stock Options ZelnickMedia	Jun. 30, 2008 Amendment to Management Agreement Restricted Stock ZelnickMedia	Mar. 31, 2012 Amendment to Management Agreement Restricted Stock ZelnickMedia General and administrative	Jun. 30, 2012 Amendment to Management Agreement Market-based restricted shares	Jun. 30, 2008 Amendment to Management Agreement Market-based restricted shares	Jun. 30, 2008 Amendment to Management Agreement Non-Employee Market-Based ZelnickMedia	Mar. 31, 2014 New Management Agreement Restricted Stock	Mar. 31, 2013 New Management Agreement Restricted Stock	Mar. 31, 2014 New Management Agreement Restricted Stock ZelnickMedia	Mar. 31, 2014 New Management Agreement Restricted Stock ZelnickMedia General and administrative	Mar. 31, 2013 New Management Agreement Restricted Stock ZelnickMedia General and administrative	Mar. 31, 2012 New Management Agreement Restricted Stock ZelnickMedia General and administrative	Mar. 31, 2014 New Management Agreement Market-based restricted shares ZelnickMedia	Aug. 31, 2007 Management Agreement Stock Options ZelnickMedia
Stock-based compensation
Vesting period											3 years															3 years			4 years									36 months
Number of shares granted											8,035,000															600,000			900,000				1,100,000				1,650,000
Minimum percentage of companies Total Shareholder Return in the NASDAQ Industrial Index the price of the company's common stock must outperform in order for restricted stock to vest																														75.00%
Minimum percentage of companies in the NASDAQ Composite Index the price of the company's common stock must outperform in order for restricted stock to vest																																					75.00%
Stock-based compensation expense	$ 78,118	$ 35,765	$ 33,494	$ 28,991	$ 17,824	$ 19,963																					$ 499							$ 16,807	$ 8,789	$ 12,866
Estimated value of restricted stock awards granted (in dollars per share)								$ 11.83	$ 7.65	$ 12.10		$ 15.73	$ 9.36	$ 16.29	$ 0.02
Weighted-average assumptions
Risk-free interest rate (as a percent)																0.60%	0.60%	0.40%	0.20%	0.30%	0.40%
Expected stock price volatility (as a percent)																39.10%	49.30%	58.20%	36.50%	40.00%	46.30%
Expected service period / Expected term until exercise																2 years	2 years 9 months 18 days	2 years	3 years 4 months 24 days	3 years 3 months 18 days	3 years 1 month 6 days
Dividends (as a percent)																0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Shares
Non-vested restricted stock at the beginning of the year (in shares)											7,357,000																				1,894,750	2,169,750
Granted (in shares)											8,035,000															600,000			900,000				1,100,000				1,650,000
Vested (in shares)											(3,863,000)
Forfeited (in shares)											(374,000)																	900,000
Non-vested restricted stock at the end of the year (in shares)											11,155,000																				1,894,750	2,169,750
Weighted Average Fair Value on Grant Date
Non-vested restricted stock at the beginning of the year (in dollars per share)											$ 11.33
Granted (in dollars per share)											$ 16.87
Vested (in dollars per share)											$ 14.18
Forfeited (in dollars per share)											$ 12.42
Non-vested restricted stock at the end of the year (in dollars per share)											$ 11.38
Future unrecognized compensation cost, net of estimated forfeitures											125,984
Stock-based compensation award, expiration date of grant																																						10 years
Stock options issued during the period to acquire shares of common stock																																						2,009,075
Exercise price of stock options at date of grant (in dollars per share)																																						$ 14.74
Cash proceeds received when a net exercise option is exercised			239																			0
Shares of the Company's common stock exchanged for stock options exercised on a net exercise basis							557,410
Options
Outstanding at the beginning of period (in shares)																						2,009,000	2,164,000	2,317,000
Exercised (in shares)																						(2,009,000)		(22,000)	(2,009,075)
Forfeited (in shares)																							(155,000)	(131,000)
Outstanding at the end of period (in shares)																							2,009,000	2,164,000
Exercisable at period-end (in shares)																							2,009,000	2,164,000
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)																						$ 14.74	$ 15.16	$ 15.37
Exercised (in dollars per share)																						$ 14.74		$ 10.96
Forfeited (in dollars per share)																							$ 20.59	$ 19.52
Outstanding at the end of the period (in dollars per share)																							$ 14.74	$ 15.16
Exercisable at period-end (in dollars per share)																							$ 14.74	$ 15.16
Remaining weighted average contractual life of options exercisable																							4 years 4 months 24 days	5 years
Aggregate intrinsic value																							$ 2,833	$ 1,296
Shares issued on exercise of options through net share settlement																						557,000
Historical annual forfeiture rate (as a percent)																						5.00%