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Intangible Assets, Goodwill and Other Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 220,192 | $ 230,908
Accumulated Amortization | 81,265 | 68,306
Carrying Value | $ 138,927 | 162,602
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Amortization Period in Years | 9 years |
Gross Carrying Amount | $ 34,291 | 31,747
Accumulated Amortization | 21,480 | 16,875
Carrying Value | $ 12,811 | 14,872
Onshore facilities and transportation | Intangible associated with lease (1) |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Amortization Period in Years | 15 years |
Gross Carrying Amount | $ 0 | 13,260
Accumulated Amortization | 0 | 5,407
Carrying Value | $ 0 | 7,853
Marine transportation |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Amortization Period in Years | 5 years |
Marine transportation | Contract intangible |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 27,800 | 27,800
Accumulated Amortization | 23,033 | 17,593
Carrying Value | $ 4,767 | 10,207
Offshore pipeline transportation |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Amortization Period in Years | 19 years |
Offshore pipeline transportation | Contract intangible |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 158,101 | 158,101
Accumulated Amortization | 36,752 | 28,431
Carrying Value | $ 121,349 | $ 129,670

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