2.2.0.7 false Consolidated Statements of Operations (Unaudited) (USD $) 0120 - Statement - Consolidated Statements of Operations (Unaudited) true false In Thousands, except Per Share data false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard 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 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard 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 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard 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 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 3 Revenue: 1 us-gaap_RevenuesAbstract 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 Natural gas sales 2 cpno_NaturalGasSales cpno false credit duration Midstream activities consisting of the sale of residue and natural gas. false false false false false false false false false false false verboselabel false 1 true true false false 84819000 84819 false false false 2 true true false false 64517000 64517 false false false 3 true true false false 205035000 205035 false false false 4 true true false false 159496000 159496 false false false xbrli:monetaryItemType monetary Midstream activities consisting of the sale of residue and natural gas. No authoritative reference available. false 5 Natural gas liquids sales 2 cpno_NaturalGasLiquidsSales cpno false credit duration Midstream and natural gas activities consisting of the sale of natural gas liquids. false false false false false false false false false false false verboselabel false 1 false true false false 114802000 114802 false false false 2 false true false false 91463000 91463 false false false 3 false true false false 234120000 234120 false false false 4 false true false false 172294000 172294 false false false xbrli:monetaryItemType monetary Midstream and natural gas activities consisting of the sale of natural gas liquids. No authoritative reference available. false 6 Transportation, compression and processing fees 2 us-gaap_GasGatheringTransportationMarketingAndProcessingRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 16516000 16516 false false false 2 false true false false 13913000 13913 false false false 3 false true false false 29630000 29630 false false false 4 false true false false 28912000 28912 false false false xbrli:monetaryItemType monetary Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. No authoritative reference available. false 7 Condensate and other 2 cpno_CondensateAndOther cpno false credit duration Midstream activities consisting of the sale of condensate and income from other midstream related activities that does not... false false false false false false false false false false false totallabel false 1 false true false false 13914000 13914 false false false 2 false true false false 10290000 10290 false false false 3 false true false false 27932000 27932 false false false 4 false true false false 20559000 20559 false false false xbrli:monetaryItemType monetary Midstream activities consisting of the sale of condensate and income from other midstream related activities that does not qualify for separate disclosure on the income statement under materiality guidelines. No authoritative reference available. true 8 Total revenue 2 us-gaap_Revenues us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 230051000 230051 false false false 2 false true false false 180183000 180183 false false false 3 false true false false 496717000 496717 false false false 4 false true false false 381261000 381261 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 true 9 Costs and expenses: 1 us-gaap_OperatingCostsAndExpensesAbstract 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 10 Cost of natural gas and natural gas liquids (1) 2 us-gaap_NaturalGasMidstreamCosts us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 167613000 167613 [1] false false false 2 false true false false 122178000 122178 [1] false false false 3 false true false false 377478000 377478 [1] false false false 4 false true false false 265497000 265497 [1] false false false xbrli:monetaryItemType monetary Cost of residue gas, natural gas liquids and condensate. Midstream is a term sometimes used to those industry activities that fall between exploration and production (upstream) and refining and marketing (downstream). The term is most often applied to pipeline transportation of crude oil and natural gas. No authoritative reference available. false 11 Transportation (1) 2 us-gaap_GasGatheringTransportationMarketingAndProcessingCosts us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 5603000 5603 [1] false false false 2 false true false false 5744000 5744 [1] false false false 3 false true false false 11279000 11279 [1] false false false 4 false true false false 11728000 11728 [1] false false false xbrli:monetaryItemType monetary Cost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products. No authoritative reference available. false 12 Operations and maintenance 2 cpno_OperationAndMaintenanceExpenses cpno false debit duration Expenses incurred for the administration, supervision, operation, maintenance, preservation and protection of the entity's... false false false false false false false false false false false verboselabel false 1 false true false false 13230000 13230 false false false 2 false true false false 12890000 12890 false false false 3 false true false false 25333000 25333 false false false 4 false true false false 25562000 25562 false false false xbrli:monetaryItemType monetary Expenses incurred for the administration, supervision, operation, maintenance, preservation and protection of the entity's assets. No authoritative reference available. false 13 Depreciation and amortization 2 us-gaap_DepreciationAndAmortization us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 15583000 15583 false false false 2 false true false false 13389000 13389 false false false 3 false true false false 30784000 30784 false false false 4 false true false false 26494000 26494 false false false xbrli:monetaryItemType monetary The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 false 14 General and administrative 2 us-gaap_GeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 10900000 10900 false false false 2 false true false false 9321000 9321 false false false 3 false true false false 21442000 21442 false false false 4 false true false false 20046000 20046 false false false xbrli:monetaryItemType monetary The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No authoritative reference available. false 15 Taxes other than income 2 us-gaap_TaxesExcludingIncomeAndExciseTaxes us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1181000 1181 false false false 2 false true false false 727000 727 false false false 3 false true false false 2343000 2343 false false false 4 false true false false 1513000 1513 false false false xbrli:monetaryItemType monetary All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax. No authoritative reference available. false 16 Equity in loss (earnings) from unconsolidated affiliates 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false 23632000 23632 false false false 2 false true false false -2099000 -2099 false false false 3 false true false false 21837000 21837 false false false 4 false true false false -3583000 -3583 false false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b true 17 Total costs and expenses 2 us-gaap_CostsAndExpenses us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 237742000 237742 false false false 2 false true false false 162150000 162150 false false false 3 false true false false 490496000 490496 false false false 4 false true false false 347257000 347257 false false false xbrli:monetaryItemType monetary Total costs of sales and operating expenses for the period. No authoritative reference available. true 18 Operating (loss) income 1 us-gaap_OperatingIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -7691000 -7691 false false false 2 false true false false 18033000 18033 false false false 3 false true false false 6221000 6221 false false false 4 false true false false 34004000 34004 false false false xbrli:monetaryItemType monetary The net result for the period of deducting operating expenses from operating revenues. No authoritative reference available. false 19 Other income (expense): 1 us-gaap_OtherNonoperatingIncomeExpenseAbstract 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 20 Interest and other income 2 cpno_InterestAndOtherIncome cpno false credit duration Interest income and other nonoperating income which does not qualify for separate disclosure on the income statement under... false false false false false false false false false false false verboselabel false 1 false true false false 37000 37 false false false 2 false true false false 7000 7 false false false 3 false true false false 44000 44 false false false 4 false true false false 53000 53 false false false xbrli:monetaryItemType monetary Interest income and other nonoperating income which does not qualify for separate disclosure on the income statement under materiality guidelines. No authoritative reference available. false 21 Gain on retirement of unsecured debt 2 us-gaap_GainsLossesOnExtinguishmentOfDebt us-gaap true credit duration No definition available. false false false false false false 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 true false false 3939000 3939 false false false xbrli:monetaryItemType monetary Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 false 22 Interest and other financing costs 2 us-gaap_InterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -13351000 -13351 false false false 2 false true false false -12001000 -12001 false false false 3 false true false false -28296000 -28296 false false false 4 false true false false -26449000 -26449 false false false xbrli:monetaryItemType monetary The cost of borrowed funds accounted for as interest that was charged against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 9 -Subsection II Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 true 23 (Loss) income before income taxes and discontinued operations 1 cpno_IncomeLossFromContinuingOperationsBeforeIncomeTaxes cpno false credit duration Represents the equity's income or loss from operations before income taxes and discontinued operations false false false false false false false false false false false verboselabel false 1 false true false false -21005000 -21005 false false false 2 false true false false 6039000 6039 false false false 3 false true false false -22031000 -22031 false false false 4 false true false false 11547000 11547 false false false xbrli:monetaryItemType monetary Represents the equity's income or loss from operations before income taxes and discontinued operations No authoritative reference available. false 24 Provision for income taxes 1 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -106000 -106 false false false 2 false true false false -571000 -571 false false false 3 false true false false -340000 -340 false false false 4 false true false false -735000 -735 false false false xbrli:monetaryItemType monetary The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b true 25 (Loss) income from continuing operations 1 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 false true false false -21111000 -21111 false false false 2 false true false false 5468000 5468 false false false 3 false true false false -22371000 -22371 false false false 4 false true false false 10812000 10812 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 26 Discontinued operations, net of tax (Note 13) 1 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false false false false 0 0 false false false 2 false true false false 570000 570 false false false 3 false false false false 0 0 false false false 4 false true false false 1131000 1131 false false false xbrli:monetaryItemType monetary This element represents the overall income (loss) from a disposal group apportioned to the parent that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items and the cumulative effect of accounting changes after deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. 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(2) true 27 Net (loss) income 1 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 true true false false -21111000 -21111 false false false 2 true true false false 6038000 6038 false false false 3 true true false false -22371000 -22371 false false false 4 true true false false 11943000 11943 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) true 28 Basic net (loss) income per common unit: 1 cpno_BasicNetLossIncomePerCommonUnitAbstract cpno false na duration Basic net (loss) income per common unit. 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 Basic net (loss) income per common unit. false 29 (Loss) income per common unit from continuing operations 2 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel true 1 true true false false -0.32 -0.32 false false false 2 true true false false 0.1 0.1 false false false 3 true true false false -0.36 -0.36 false false false 4 true true false false 0.2 0.2 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 30 Income per common unit from discontinued operations 2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare us-gaap true na duration No definition available. false false false false false false false false false false false totallabel true 1 false false false false 0 0 false false false 2 true true false false 0.01 0.01 false false false 3 false false false false 0 0 false false false 4 true true false false 0.02 0.02 false false false us-types:perShareItemType decimal The amount of income (loss) from disposition of discontinued operations, net of related tax effect, per each share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8, 9, 10, 36, 37, 38 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 true 31 Net (loss) income per common unit 2 us-gaap_EarningsPerShareBasic us-gaap true na duration No definition available. false false false false false false false false false false false totallabel true 1 true true false false -0.32 -0.32 false false false 2 true true false false 0.11 0.11 false false false 3 true true false false -0.36 -0.36 false false false 4 true true false false 0.22 0.22 false false false us-types:perShareItemType decimal The amount of net income or loss for the period 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 true 32 Weighted average number of common units 1 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 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 65516000 65516 false false false 2 false true false false 54356000 54356 false false false 3 false true false false 61941000 61941 false false false 4 false true false false 54185000 54185 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 33 Diluted net (loss) income per common unit: 1 cpno_DilutedEarningsPerUnitAbstract cpno false na duration Diluted earnings per unit abstract 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 Diluted earnings per unit abstract false 34 (Loss) income per common unit from continuing operations 2 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel true 1 true true false false -0.32 -0.32 false false false 2 true true false false 0.09 0.09 false false false 3 true true false false -0.36 -0.36 false false false 4 true true false false 0.19 0.19 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 35 Income per common unit from discontinued operations 2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare us-gaap true na duration No definition available. false false false false false false false false false false false totallabel true 1 false false false false 0 0 false false false 2 true true false false 0.01 0.01 false false false 3 false false false false 0 0 false false false 4 true true false false 0.02 0.02 false false false us-types:perShareItemType decimal The amount of income (loss) from discontinued operations, net of related tax effect, per each diluted share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section E -Paragraph Question 3 true 36 Net (loss) income per common unit 2 us-gaap_EarningsPerShareDiluted us-gaap true na duration No definition available. false false false false false false false false false false false totallabel true 1 true true false false -0.32 -0.32 false false false 2 true true false false 0.1 0.1 false false false 3 true true false false -0.36 -0.36 false false false 4 true true false false 0.21 0.21 false false false us-types:perShareItemType decimal The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 11, 12, 36 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 true 37 Weighted average number of common units 1 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 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 65516000 65516 false false false 2 false true false false 57946000 57946 false false false 3 false true false false 61941000 61941 false false false 4 false true false false 57933000 57933 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 false 1 Exclusive of operations and maintenance and depreciation and amortization shown separately below. 4 35 false Thousands Thousands NoRounding false true