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Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Other Intangible Assets [Line Items] |  |
Accumulated amortization | $ (20,431) | $ (13,220)
Intangible assets, net | 123,788 | 130,999
Intangible assets, gross | 180,535 | 159,816
Intangible assets, net | 160,104 | 146,596
Rights-of-way assets |  |
Other Intangible Assets [Line Items] |  |
Rights-of-way assets | $ 36,316 | $ 15,597
Marketing contract |  |
Other Intangible Assets [Line Items] |  |
Estimated useful life (years) | 20 years | 20 years
Intangible assets, gross | $ 144,219 | $ 144,219
Accumulated amortization | (20,431) | (13,220)
Intangible assets, net | $ 123,788 | $ 130,999

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