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Lease Accounting (Narrative) (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) mi | Mar. 31, 2018 USD ($)
Lessor, Lease, Description [Line Items] |  |
Operating lease costs | $ 13,200 |
Number of miles of pipe leased as lessor | mi | 86 |
Fixed quarterly payments to be received under finance lease arrangement | $ 5,200 |
Interest rate under finance lessor arrangement | 10.25% |
Fair value of direct finance lease, current | $ 8,600 |
Marine Transportation |  |
Lessor, Lease, Description [Line Items] |  |
Lease revenue | 6,700 | $ 6,300
Onshore Facilities & Transportation |  |
Lessor, Lease, Description [Line Items] |  |
Lease revenue | 1,600 | $ 1,500
Fair value of direct finance lease, current | $ 123,335 |

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- Definition Lessor, Number of Pipeline Miles Leased + References No definition available. + Details
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- Definition Sales-type and Direct Financing Leases, Lease Receivable, Quarterle Payments to be Received + References No definition available. + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77888421&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=109225645&loc=SL77927221-108306 + Details
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- Definition Present value of lease payments not yet received by lessor and amount expected to be derived from underlying asset, following end of lease term guaranteed by lessee or other third party unrelated to lessor, from sales-type and direct financing leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919391-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919379-209981 + Details
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