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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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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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