Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following: 

	March 31		December 31
	2013		2012
	(In thousands)
Coal	$	182,998	$	180,917
Repair parts and supplies	170,040		172,139
Work-in-process	15,202		12,368
	$	368,240	$	365,424