Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Inventories

		June 30,		December 31,
		2012		2011
		(In thousands)
Coal	$	267,600	$	206,517
Repair parts and supplies		178,626		163,527
Work-in-process		8,865		7,446
	$	455,091	$	377,490