Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following: 

	December 31
	2012		2011
	(In thousands)
Coal	$	180,917	$	206,517
Repair parts and supplies	172,139		163,527
Work-in-process	12,368		7,446
	$	365,424	$	377,490