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COMMON STOCK Treasury Shares (Details) (Treasury Stock [Member])
12 Months Ended
Dec. 31, 2014
Treasury Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Treasury Stock, Shares, Acquired 97,646us-gaap_TreasuryStockSharesAcquired
/ us-gaap_AwardTypeAxis
= us-gaap_TreasuryStockMember
Treasury Stock, Shares, Retired 703us-gaap_TreasuryStockSharesRetired
/ us-gaap_AwardTypeAxis
= us-gaap_TreasuryStockMember
Treasury stock acquired and reissued 83,208pdce_TreasuryStockAcquiredAndReissued
/ us-gaap_AwardTypeAxis
= us-gaap_TreasuryStockMember
Treasury stock acquired, and available for reissuance 13,735pdce_TreasuryStockAcquiredAndAvailableForReissuance
/ us-gaap_AwardTypeAxis
= us-gaap_TreasuryStockMember