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Inventories

3 Months Ended

Mar. 31, 2012

8. Inventories

Inventories consist of the following:


	March 31	December 31
	2012	2011
	(In thousands)
Coal	$ 298,744	$ 206,517
Repair parts and supplies	174,747	163,527
Work-in-process	15,195	7,446
	$ 488,686	$ 377,490

The repair parts and supplies are stated net of an allowance for slow-moving and obsolete inventories of $13.4 million at March 31, 2012, and $13.1 million at December 31, 2011.

- 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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