Other Intangible Assets

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Our identifiable intangible assets are as follows (in thousands):


	Useful			Accumulated
As of December 31, 2022	Life	Gross		Amortization		Net
Intangible assets subject to amortization:
Customer relationships	11.6 years	$	210,000	$	(10,560)	$	199,440
Marketing contract	20 years	144,219		(34,853)		109,366
Rights-of-way assets	8 - 35 years	13,490		(377)		13,113
Intangible assets not subject to amortization:
Rights-of-way assets	Indefinite	42,877				42,877
Total		$	410,586	$	(45,790)	$	364,796


	Useful			Accumulated
As of December 31, 2021	Life	Gross		Amortization		Net
Intangible assets subject to amortization:
Marketing contract	20 years	$	144,219	$	(27,642)	$	116,577
Intangible assets not subject to amortization:
Rights-of-way assets	Indefinite	37,280				37,280
Total		$	181,499	$	(27,642)	$	153,857

Amortization of the rights-of-way assets and customer relationships intangible asset was $10.9 million for the year ended December 31, 2022, and is included in depreciation and amortization on the accompanying consolidated statements of income and comprehensive income. Amortization of the marketing contract was $7.2 million during the years ended December 31, 2022, 2021 and 2020, and is included as a reduction of net revenue on the accompanying consolidated statements of income and comprehensive income.

Amortization expense is estimated to be $0.6 million $7.2 million and $18.1 million for the rights-of-way assets, marketing contract intangible and the customer relationship intangible, respectively, for each of the years ended December 31, 2023 through 2027.