Inventories (Tables)

12 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Components of inventories

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

	March 31, 2015		March 31, 2014
Raw materials	$	13,263	$	9,734
Work in process	197,565		179,692
Finished goods	68,628		73,299
	$	279,456	$	262,725