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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2018-12-31","val":5000000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15"},{"end":"2018-12-31","val":5000000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2018-12-31","val":5000000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2018Q4I"},{"end":"2019-03-31","val":5000000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":5000000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":5000000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"}]}},"AccumulatedCapitalizedInterestCosts":{"label":"Accumulated Capitalized Interest Costs","description":"Amount of accumulated interest costs capitalized as part of property, plant and equipment cost basis.","units":{"USD":[{"end":"2012-12-31","val":906000,"accn":"0001144204-14-012672","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2012-12-31","val":906000,"accn":"0001144204-15-013000","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012Q4I"},{"end":"2013-12-31","val":7276000,"accn":"0001144204-14-012672","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"end":"2013-12-31","val":7276000,"accn":"0001144204-15-013000","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2013-12-31","val":7276000,"accn":"0001144204-16-084719","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2013Q4I"},{"end":"2014-12-31","val":5741000,"accn":"0001144204-15-013000","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":5741000,"accn":"0001144204-16-084719","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29"},{"end":"2014-12-31","val":5741000,"accn":"0001144204-17-011934","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2014Q4I"}]}},"AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment":{"label":"Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment","description":"Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2010-12-31","val":176897000,"accn":"0001144204-11-036837","fy":2011,"fp":"Q1","form":"10-Q/A","filed":"2011-06-21","frame":"CY2010Q4I"},{"end":"2011-03-31","val":193892000,"accn":"0001144204-11-036837","fy":2011,"fp":"Q1","form":"10-Q/A","filed":"2011-06-21","frame":"CY2011Q1I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. 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Includes only common stock transactions (excludes preferred stock transactions). 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Retirement Obligation, Revision of Estimate","description":"Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the 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Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2016-12-31","val":57633000,"accn":"0001144204-18-028222","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-14"},{"end":"2016-12-31","val":57633000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2016Q4I"},{"end":"2017-03-31","val":8785000,"accn":"0001144204-18-028222","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-14","frame":"CY2017Q1I"},{"end":"2017-12-31","val":4896000,"accn":"0001144204-18-028222","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-14"},{"end":"2017-12-31","val":4896000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2017Q4I"},{"end":"2018-03-31","val":30366000,"accn":"0001144204-18-028222","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-14","frame":"CY2018Q1I"},{"end":"2018-05-31","val":28732000,"accn":"0001558370-19-002576","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-29"},{"end":"2018-05-31","val":28732000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2018-05-31","val":28732000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14"},{"end":"2018-05-31","val":28732000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14"},{"end":"2018-06-30","val":13004000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2018Q2I"},{"end":"2018-09-30","val":5693000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":6313000,"accn":"0001558370-19-002576","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-29"},{"end":"2018-12-31","val":6313000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15"},{"end":"2018-12-31","val":6313000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2018-12-31","val":6313000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14"},{"end":"2018-12-31","val":6313000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2018Q4I"},{"end":"2019-03-31","val":19439000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":13650000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":98348000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":38968000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2019Q4I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect","description":"Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. 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5Q2I"},{"end":"2015-09-30","val":15323000,"accn":"0001144204-15-063462","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-09","frame":"CY2015Q3I"},{"end":"2015-12-31","val":10741000,"accn":"0001144204-16-084719","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29"},{"end":"2015-12-31","val":10741000,"accn":"0001144204-16-100069","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"end":"2015-12-31","val":10741000,"accn":"0001144204-16-117390","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":10741000,"accn":"0001144204-16-132513","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09"},{"end":"2015-12-31","val":10741000,"accn":"0001144204-17-011934","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015Q4I"},{"end":"2016-03-31","val":8096000,"accn":"0001144204-16-100069","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":665000,"accn":"0001144204-16-117390","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":464000,"accn":"0001144204-16-132513","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09","frame":"CY2016Q3I"},{"end":"2017-03-31","val":319000,"accn":"0001144204-17-025743","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1I"},{"end":"2017-09-30","val":193000,"accn":"0001144204-17-057379","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-09","frame":"CY2017Q3I"},{"end":"2018-12-31","val":8499000,"accn":"0001558370-19-002576","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-29"},{"end":"2018-12-31","val":8499000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15"},{"end":"2018-12-31","val":8499000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"end":"2018-12-31","val":8499000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14"},{"end":"2018-12-31","val":8499000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2018Q4I"},{"end":"2019-03-31","val":3220000,"accn":"0001558370-19-005026","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":4781000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":1933000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"}]}},"DerivativeCashReceivedOnHedge":{"label":"Derivative, 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Includes assets elected not to be offset. Excludes assets not subject to a master netting 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Capital Account, Units, Converted","description":"The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.","units":{"shares":[{"start":"2011-01-01","end":"2011-01-31","val":213337,"accn":"0001144204-11-062118","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08"},{"start":"2011-01-01","end":"2011-01-31","val":213337,"accn":"0001144204-11-045015","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"}]}},"PartnersCapitalAccountUnitsSoldInPublicOffering":{"label":"Partners' Capital Account, Units, Sold in Public Offering","description":"The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.","units":{"shares":[{"start":"2009-06-01","end":"2009-06-30","val":4025000,"accn":"0001144204-12-011999","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"start":"2009-09-01","end":"2009-09-30","val":3220000,"accn":"0001144204-12-011999","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"start":"2010-02-01","end":"2010-02-28","val":3450000,"accn":"0001144204-12-011999","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"start":"2010-02-01","end":"2010-02-28","val":3450000,"accn":"0001144204-13-012203","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2010-08-01","end":"2010-08-31","val":3450000,"accn":"0001144204-12-011999","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"start":"2010-08-01","end":"2010-08-31","val":3450000,"accn":"0001144204-13-012203","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2011-03-01","end":"2011-03-31","val":3450000,"accn":"0001144204-11-045015","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"start":"2011-03-01","end":"2011-03-31","val":3450000,"accn":"0001144204-11-062118","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-08"},{"start":"2011-03-01","end":"2011-03-31","val":3450000,"accn":"0001144204-12-011999","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"start":"2011-03-01","end":"2011-03-31","val":3450000,"accn":"0001144204-13-012203","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2011-03-01","end":"2011-03-31","val":3450000,"accn":"0001144204-14-012672","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-12-027151","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-09"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-12-044114","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-09"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-12-060501","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-13-012203","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-14-012672","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-02-01","end":"2012-02-29","val":4025000,"accn":"0001144204-15-013000","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012Q1I"},{"start":"2013-10-01","end":"2013-10-31","val":5750000,"accn":"0001144204-14-012672","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-10-01","end":"2013-10-31","val":5750000,"accn":"0001144204-15-013000","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"start":"2013-10-01","end":"2013-10-31","val":5750000,"accn":"0001144204-16-084719","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-29","frame":"CY2013Q3I"}]}},"PartnersCapitalOther":{"label":"Partners' 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for Repurchase of Common Stock","description":"The cash outflow to reacquire common stock during the period.","units":{"USD":[{"start":"2018-06-01","end":"2018-09-30","val":247000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2018Q3"},{"start":"2018-06-01","end":"2018-12-31","val":247000,"accn":"0001558370-19-002576","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-29"},{"start":"2018-06-01","end":"2018-12-31","val":247000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14"},{"start":"2019-01-01","end":"2019-06-30","val":167000,"accn":"0001558370-19-008097","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14"},{"start":"2019-01-01","end":"2019-09-30","val":295000,"accn":"0001558370-19-011064","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14"},{"start":"2019-01-01","end":"2019-12-31","val":315000,"accn":"0001558370-20-003884","fy":2019,"fp":"FY","form":"10-K","filed":"2020-04-14","frame":"CY2019"}]}},"PaymentsOfCapitalDistribution":{"label":"Payments of Capital Distribution","description":"Cash 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Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. 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