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Inventory	3 Months Ended
Inventory	Mar. 31, 2012
Inventory [Abstract]
Inventory	(4) INVENTORY Inventory recorded in current assets includes $4.2 million at March 31, 2012 and $7.8 million at December 31, 2011, for natural gas in underground storage owned by the Company's E&P segment, and $33.1 million at March 31, 2012 and $38.4 million at December 31, 2011, for tubulars and other equipment used in the E&P segment. Other Assets include $19.5 million at March 31, 2012 and December 31, 2011, respectively, for inventory held by the Midstream Services segment consisting primarily of pipe that will be used to construct gathering systems for the Fayetteville Shale play.

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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