Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Related Party Transactions

Summary of related party transactions

The following table summarizes related party transactions for the years ended December 31 (in thousands):

	2012		2011		2010
Sales of coal to Venture Fuels Partnership	$	22,069	$	20,461	$	27,674
Transactions with Rio Tinto:
Transitional support services Rent expense paid to Rio Tinto	$	—	$	—	$	245
Other commercial transactions
Agency services fees paid to Rio Tinto	$	—	$	712	$	245
Revenue from export sales agreements with Rio Tinto	$	—	$	16,203	$	8,569