Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information

Segment Information

12.  Segment Information

Our management reviews, manages, and operates our business as a single operating segment - the production of low sulfur, steam coal from surface mines, located in the Western region of the U.S. within the PRB, which is sold to electric utilities and industrial customers.

The following table presents a summary of total revenues from external customers by geographic location (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2011		2010		2011		2010
United States	$	315,220	$	318,579	$	919,975	$	895,571
Other	91,730		53,785		231,199		129,389
Total revenues from external customers	$	406,950	$	372,364	$	1,151,174	$	1,024,960

We attribute revenue to individual countries based on the location of the customer.  Our sales outside of the United States are made primarily to customers in Asia and Canada.  All of our revenues for the nine months ended September 30, 2011 and 2010 originated in the U.S.

As of September 30, 2011 and December 31, 2010, all of our long-lived assets were located in the U.S.