Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified	Total	Total Antero equity	Members' equity	Accumulated (deficit) earnings	Noncontrolling interest
Balances at Dec. 31, 2009	$ 1,299,107	$ 1,269,386	$ 1,392,833	$ (123,447)	$ 29,721
Increase (Decrease) in Stockholders' Equity
Issuance of member units in business acquisition	97,000	97,000	97,000
Equity issuance costs	(27)	(27)	(27)
Sale of midstream subsidiary	(31,285)				(31,285)
Net income (loss) and comprehensive income (loss)	230,192	228,628		228,628	1,564
Balances at Dec. 31, 2010	1,594,987	1,594,987	1,489,806	105,181
Increase (Decrease) in Stockholders' Equity
Distribution to members	(28,859)	(28,859)	(28,859)
Net income (loss) and comprehensive income (loss)	392,678	392,678		392,678
Balances at Dec. 31, 2011	1,958,806	1,958,806	1,460,947	497,859
Increase (Decrease) in Stockholders' Equity
Net income (loss) and comprehensive income (loss)	(285,069)	(285,069)		(285,069)
Balances at Dec. 31, 2012	$ 1,673,737	$ 1,673,737	$ 1,460,947	$ 212,790

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

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- Definition

Total distributions to each class of partners (i.e., general, limited and preferred partners).

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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