SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Mar. 31, 2013

SHARE-BASED COMPENSATION

Schedule of share-based compensation expense

	Year Ended March 31,
(In thousands)	2013		2012		2011
Cost of goods manufactured and sold	$	4,375	$	2,962	$	1,725
Research and development		9,078		8,784		6,218
Selling, general and administrative		21,263		17,080		11,889
Total share-based compensation expense	$	34,716	$	28,826	$	19,832

Summary of stock option activity

	Number of Shares			Weighted Average Exercise Price
Outstanding, April 1, 2012		17,359,760		$	13.68
Granted		2,535,500		$	16.84
Exercised		(3,052,642	)	$	11.26
Forfeited		(334,063	)	$	14.98
Expired		(57,451	)	$	20.12
Outstanding, March 31, 2013		16,451,104		$	14.57
Exercisable, March 31, 2013		10,321,840		$	14.13

Summary of time-vested RSU activity

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested, April 1, 2012		2,114,176		$	13.45
Granted		1,032,530		$	16.55
Vested		(799,935	)	$	12.41
Forfeited		(120,000	)	$	15.70
Unvested, March 31, 2013		2,226,771		$	15.14