COMMON STOCK REPURCHASES (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Payments for Repurchase of Common Stock	$ 23,931	$ 273,791	$ 105,522
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	881,907
Treasury Stock, Value, Acquired, Cost Method	23,931	273,791	105,522
Employees Taxes Withheld And Paid For Restricted Stock And Restricted Stock Units	3,047	2,596	194
Treasury Stock, Shares, Retired	5,398,376	5,000,000	4,000,000
Treasury Stock, Retired, Cost Method, Amount	176,344	177,106	102,365
Share Repurchases, Total
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	751,706	8,027,287	3,315,000
Payments for Repurchase of Common Stock	23,900	273,800	105,500
Accelerated Share Repurchases, Total
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired		4,327,770
Open Market Repurchases
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	751,706	3,699,517	3,315,000
Payments for Repurchase of Common Stock	23,900	123,800	105,500
Treasury Stock Acquired, Average Cost Per Share	$ 31.84	$ 33.46	$ 31.83
Accelerated Share Repurchase
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Acquired, Average Cost Per Share		$ 34.66
Treasury Stock, Value, Acquired, Cost Method		$ 150,000