2.2.0.7 false Earnings Per Share (Details) (USD $) 0608 - Disclosure - Earnings Per Share (Details) true false In Millions, except Per Share data false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ 3 Reconciliation of basic and diluted earnings per share 1 us-gaap_EarningsPerShareReconciliationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 4 Income from continuing operations 2 us-gaap_IncomeLossFromContinuingOperations us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 42800000 42.8 false false false 2 true true false false 79900000 79.9 false false false 3 true true false false 181200000 181.2 false false false 4 true true false false 363500000 363.5 false false false xbrli:monetaryItemType monetary This element represents the income or loss from continuing operations attributable to the reporting entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items and cumulative effects of changes in accounting principles, but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 28 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph b(1) false 5 Income from continuing operations allocated to non-vested share awards (participating securities) 2 pde_IncomeLossFromContinuingOperationsAllocatedToNonVestedShareAwards pde false credit duration Income (loss) from continuing operations allocated to non-vested share awards. false false false false false false false false false false false totallabel false 1 false true false false -500000 -0.5 false false false 2 false true false false -1200000 -1.2 false false false 3 false true false false -2100000 -2.1 false false false 4 false true false false -5600000 -5.6 false false false xbrli:monetaryItemType monetary Income (loss) from continuing operations allocated to non-vested share awards. No authoritative reference available. true 6 Income from continuing operations - basic and diluted 2 pde_IncomeFromContinuingOperationsBasicAndDiluted pde false credit duration Income from continuing operations - basic and diluted. false false false false false false false false false false false totallabel false 1 true true false false 42300000 42.3 false false false 2 true true false false 78700000 78.7 false false false 3 true true false false 179100000 179.1 false false false 4 true true false false 357900000 357.9 false false false xbrli:monetaryItemType monetary Income from continuing operations - basic and diluted. No authoritative reference available. true 7 Weighted average shares of common stock outstanding - basic 2 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic us-gaap true na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 175700000 175.7 false false false 2 false true false false 173500000 173.5 false false false 3 false true false false 175500000 175.5 false false false 4 false true false false 173400000 173.4 false false false xbrli:sharesItemType shares Number of [basic] shares, after adjustment for contingently issuable shares and other shares not deemed outstanding, determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 false 8 Stock options 2 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 400000 0.4 false false false 2 false true false false 500000 0.5 false false false 3 false true false false 400000 0.4 false false false 4 false true false false 300000 0.3 false false false xbrli:sharesItemType shares Aggregate awards of share options and nonvested shares to be issued to an employee under a share-based compensation arrangement are considered options for purposes of computing diluted earnings per share. Such share-based awards shall be considered to be outstanding as of the grant date for purposes of computing diluted earnings per share even though their exercise may be contingent upon vesting. Those share-based awards are included in the diluted Earnings Per Share (EPS) computation even if the employee may not receive (or be able to sell) the stock until some future date. Accordingly, all shares to be issued shall be included in computing diluted EPS if the effect is dilutive. The dilutive effect of share-based compensation arrangements shall be computed using the treasury stock method. If the equity share options or other equity instruments are outstanding for only part of a period, the shares issuable shall be weighted to reflect the portion of the period during which the equity instruments were outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 20 false 9 Restricted stock awards 2 pde_IncrementalCommonSharesAttributableToRestrictedStockAwards pde false na duration Incremental common shares attributable to restricted stock awards. false false false false false false false false false false false totallabel false 1 false true false false 100000 0.1 false false false 2 false false false false 0 0 false false false 3 false true false false 100000 0.1 false false false 4 false false false false 0 0 false false false xbrli:sharesItemType shares Incremental common shares attributable to restricted stock awards. No authoritative reference available. true 10 Weighted average shares of common stock outstanding - diluted 2 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 176200000 176.2 false false false 2 false true false false 174000000 174.0 false false false 3 false true false false 176000000 176.0 false false false 4 false true false false 173700000 173.7 false false false xbrli:sharesItemType shares The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 true 11 Income from continuing operations per share: 2 pde_IncomeFromContinuingOperationsPerShareAbstract pde false na duration Income from continuing operations per share. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Income from continuing operations per share. false 12 Basic 3 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare us-gaap true na duration No definition available. false false false false false false false false false false false terselabel true 1 true true false false 0.24 0.24 false false false 2 true true false false 0.45 0.45 false false false 3 true true false false 1.02 1.02 false false false 4 true true false false 2.06 2.06 false false false us-types:perShareItemType decimal The amount of income (loss) from continuing operations per each share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 false 13 Diluted 3 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare us-gaap true na duration No definition available. false false false false false false false false false false false terselabel true 1 true true false false 0.24 0.24 false false false 2 true true false false 0.45 0.45 false false false 3 true true false false 1.02 1.02 false false false 4 true true false false 2.06 2.06 false false false us-types:perShareItemType decimal The amount of income (loss) from continuing operations available to each share of common stock outstanding during the reporting period and each share that would have been outstanding assuming the issuance of common shares for all dilutive potential common shares outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 11, 12, 36, 37, 38 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 false 14 Earnings Per Share (Textuals) [Abstract] 1 pde_EarningsPerShareTextualsAbstract pde false na duration Earnings Per Share Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Earnings Per Share Textuals. false 15 Common stock issuable persuant to outstanding stock options, antidilutive 2 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 900000 0.9 false false false 2 false true false false 1400000 1.4 false false false 3 false true false false 900000 0.9 false false false 4 false true false false 2600000 2.6 false false false xbrli:sharesItemType shares Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented. 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