Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventories [Abstract]

Inventories

	December 31
	2011	2010
	(In thousands)
Coal	$  206,517	$  115,647
Repair parts and supplies	163,527	119,969
Work-in-process	7,446	—
	$  377,490	$  235,616