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Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue had a mix of decimals attribute values: 0 2. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice had a mix of decimals attribute values: 0 2. Element us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice had a mix of decimals attribute values: 0 2. 'Monetary' elements on report '2402403 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Detail (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2403402 - Disclosure - FAIR VALUE MEASUREMENTS AND DISCLOSURES Fair Value Measurements and Disclosures (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2407405 - Disclosure - INCOME TAXES Unrecognized Tax Benefits (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2407406 - Disclosure - INCOME TAXES Additional Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412402 - Disclosure - COMMON STOCK Stockholders' Equity Note (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412404 - Disclosure - COMMON STOCK Stocked Based Compensation Summary (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412407 - Disclosure - COMMON STOCK Schedule of Changes in SARs (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412408 - Disclosure - COMMON STOCK Schedule of Changes in Restricted Stock - TIme Based Awards (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412410 - Disclosure - COMMON STOCK Schedule of Changes in Restricted Stock - Market Based Awards (Details)' had a mix of different decimal attribute values. 'Shares' elements on report '2414402 - Disclosure - EARNINGS PER SHARE Earnings Per Share (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2415402 - Disclosure - ASSETS HELD FOR SALE, DIVESTITURES AND DISCONTINUED OPERATIONS Additional Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2416403 - Disclosure - ACQUISITIONS Additional Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2416404 - Disclosure - ACQUISITIONS Pro Forma Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2418402 - Disclosure - TRANSACTIONS WITH AFFILIATES AND OTHER RELATED PARTIES Transactions with Affiliates and Other Related Parties (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2418403 - Disclosure - TRANSACTIONS WITH AFFILIATES AND OTHER RELATED PARTIES Additional Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2421406 - Disclosure - SUPPLEMENTAL INFORMATION - NATURAL GAS AND CRUDE OIL PROPERTIES Costs Incurred in Natural Gas and Crude Oil Property Acquisition, Exploration and Development Activities (Unadited) (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2421409 - Disclosure - SUPPLEMENTAL INFORMATION - NATURAL GAS AND CRUDE OIL PROPERTIES Principal Sources of Change in Standardized Measure of Discounted Future Net Cash Flows (Unuadited) (Details)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - Consolidated Balance Sheets (Audited) Process Flow-Through: Removing column 'Dec. 31, 2010' Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: 1002000 - Statement - Consolidated Statements of Operations (Audited) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: 1003000 - Statement - Consolidated Statements of Cash Flows (Audited) pdce-20121231.xml pdce-20121231.xsd pdce-20121231_cal.xml pdce-20121231_def.xml pdce-20121231_lab.xml pdce-20121231_pre.xml true true