Inventories (Tables)

6 Months Ended

Sep. 30, 2014

Inventory Disclosure [Abstract]

Components of inventories

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

	September 30, 2014		March 31, 2014
Raw materials	$	14,013	$	9,734
Work in process	186,499		179,692
Finished goods	75,234		73,299
	$	275,746	$	262,725