TAXES (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate	27.20%	21.50%	26.30%	21.00%
Income Tax Expense (Benefit)	$ 41,146,000	$ 8,342,000	$ 48,736,000	$ 14,522,000
Effective tax rate excluding special items	15.40%		18.20%
Unrecognized Tax Benefits	1,600,000		1,600,000
FB Entities [Member]
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)	36,000,000		36,000,000
United Kingdom Location [Member]
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 2,100,000		$ 2,100,000