INCOME TAXES (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Income taxes based on domestic statutory rates	$ 114,011,000	$ 68,077,000	$ 55,899,000
Effect of tax rate differential	(80,842,000)	(68,654,000)	(120,785,000)
Intangible amortization	5,143,000	4,750,000	4,881,000
Change in liability for uncertain tax positions	29,729,000	(2,178,000)	15,268,000
Change in valuation allowance	2,495,000	26,838,000	68,596,000
Other	(682,000)	6,027,000	2,454,000
Provision for income taxes	69,854,000	34,860,000	26,313,000
Income resulting from tax holidays and tax incentives	9,800,000	15,200,000	22,600,000
Expiration date of existing holidays	2022
Tax effect of foreign income not repatriated to Singapore	$ 0	$ 51,500,000	$ 26,700,000
Effect on basic loss per share due to income resulting from tax holidays and tax incentives (in dollars per share)	$ 0.02	$ 0.02	$ 0.03
Effect on diluted loss per share due to income resulting from tax holidays and tax incentives (in dollars per share)	$ 0.02	$ 0.02	$ 0.03