1.0.0.3 false BASIS OF PRESENTATION false 1 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 0 xec_NotesToConsolidatedFinancialStatementsAbstract xec false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 BASIS OF PRESENTATION 1 us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 <table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td> 1. BASIS OF PRESENTATION         Cimarex was formed in February 2002 as a wholly-owned subsidiary of Helmerich & Payne, Inc. (H&P). On September 30, 2002, Cimarex was spun-off and became a stand-alone company. Also on September 30, 2002, Cimarex acquired 100% of the outstanding common stock of Key Production Company, Inc. (Key) in a tax-free exchange.         In June of 2005, we acquired Magnum Hunter Resources, Inc. in a stock-for-stock merger. Magnum Hunter's results of operations are included in our consolidated statements of operations beginning June 7, 2005.         The accounts of Cimarex and its subsidiaries are presented in the accompanying Consolidated Financial Statements. All intercompany accounts and transactions were eliminated in consolidation.         Our Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues, and expenses. Our significant accounting policies are described in Note 3 to our Consolidated Financial Statements. We analyze our estimates, including those related to oil and gas revenues, reserves and properties, as well as goodwill and contingencies, and base our estimates on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.         Certain amounts in prior years' financial statements have been reclassified to conform to the 2009 financial statement presentation. In addition, effective January 1, 2009, we adopted new rules promulgated by the Financial Accounting Standards Board (FASB) pertaining to the accounting treatment for certain convertible debt instruments (see Note 7) and to the calculation of earnings per share (see Note 10). Accordingly, prior periods have been adjusted retrospectively to conform to the applicable accounting pronouncements. </td></tr></table> 1. BASIS OF PRESENTATION         Cimarex was formed in February 2002 as a wholly-owned subsidiary of false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true