Inventories (Tables)

12 Months Ended

Mar. 31, 2014

Inventory Disclosure [Abstract]

Components of inventories

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

	March 31, 2014		March 31, 2013
Raw materials	$	9,734	$	9,020
Work in process	179,692		181,750
Finished goods	73,299		51,564
	$	262,725	$	242,334