Inventory (Tables)

6 Months Ended

Jun. 30, 2013

Spare parts and warehouse inventories are stated at the lower of cost or market based on the first-in, first-out method of accounting. Fuel inventory is based on the average inventory method of accounting. As of June 30, 2013 and December 31, 2012, our inventory balances were approximately $10.0 million and $11.8 million, respectively. Our inventory consists of three major classes, the break out of which is included in the following table:

(All amounts in thousands)	June 30,		December 31,
Inventory Classes	2013		2012
Spares Inventory	$	3,490	$	3,652
Fuel Inventory		3,413		4,633
Warehouse Inventory		3,082		3,562
	$	9,985	$	11,847