Inventories (Tables)

12 Months Ended

Mar. 31, 2012

Inventory Disclosure [Abstract]

Components of inventories

The components of inventories consist of the following (amounts in thousands):

	March 31, 2012		March 31, 2011
Raw materials	$	8,065	$	8,174
Work in process	139,045		141,462
Finished goods	70,168		31,164
	$	217,278	$	180,800