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This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":1129000,"accn":"0001620928-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":46000,"accn":"0001620928-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016"},{"start":"2017-11-13","end":"2017-12-31","val":20000,"accn":"0001620928-18-000005","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-15","frame":"CY2017Q4"}]}},"AssetRetirementObligationRevisionOfEstimate":{"label":"Asset 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 obligation.","units":{"USD":[{"start":"2015-01-01","end":"2015-12-31","val":626000,"accn":"0001620928-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2015"},{"start":"2017-01-01","end":"2017-11-12","val":2489000,"accn":"0001620928-18-000005","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-15"}]}},"AssetRetirementObligationsNoncurrent":{"label":"Asset Retirement Obligations, Noncurrent","description":"Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. 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