Intangible assets (Tables)

12 Months Ended

Mar. 31, 2013

License agreements, product rights and other intangibles

License agreements, product rights and other intangibles consist of the following:

(In thousands)	March 31, 2013				March 31, 2012
	Gross carrying amount		Accumulated amortization		Gross carrying amount		Accumulated amortization
Amortized intangible assets:
License agreements	$	1,528,114	$	160,805	$	1,403,114	$	107,314
Product rights		89,407		61,472		90,817		52,929
Buy-out of royalty agreements		798,617		66,222		798,617		28,257
Trade names		34,190		34,190		34,190		34,190
Total	$	2,450,328	$	322,689	$	2,326,738	$	222,690

Future annual amortization expense

Amortization of license agreements, product rights and other intangibles charged to SG&A expense and cost of goods sold for fiscal years ended March 31, 2013, 2012 and 2011 amounted to approximately $99.9 million, $80.9 million and $30.8 million, respectively. Future annual amortization expense expected is as follows:

(In thousands)

Years ending March 31,
2014	$	135,362
2015		210,118
2016		238,809
2017		284,804
2018		335,950
	$	1,205,043