Inventories (Notes)

6 Months Ended

Sep. 30, 2013

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



	September 30, 2013		March 31, 2013
Raw materials	$	8,690	$	9,020
Work in process	211,917		181,750
Finished goods	54,517		51,564
	$	275,124	$	242,334

Inventories are valued at the lower of cost or market using the first-in, first-out method. Inventory impairment charges establish a new cost basis for inventory and charges are not subsequently reversed to income even if circumstances later suggest that increased carrying amounts are recoverable.

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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