Goodwill and Intangible Assets

Goodwill by segment consisted of the following:



(in thousands)	December 31, 2018		December 31, 2017
Wireless	$	146,383	$	146,383
Cable	104		104
Wireline	10		10
Total Goodwill	$	146,497	$	146,497

Intangible assets consisted of the following:



	December 31, 2018							December 31, 2017
(in thousands)	Gross Carrying Amount		Accumulated Amortization and Other			Net		Gross Carrying Amount		Accumulated Amortization and Other			Net
Non-amortizing intangibles:
Cable franchise rights	$	64,334	$	—		$	64,334	$	64,334	$	—		$	64,334
Railroad crossing rights	141		—			141		141		—			141
Total non-amortizing intangibles	64,475		—			64,475		64,475		—			64,475

Finite-lived intangibles:
Affiliate contract expansion - Wireless	455,305		(167,830		)	287,475		410,157		(105,964		)	304,193
Favorable leases - Wireless	15,743		(1,919		)	13,824		13,103		(1,222		)	11,881
Acquired subscribers - Cable	25,265		(25,250		)	15		25,265		(25,100		)	165
Other intangibles	463		(223		)	240		463		(198		)	265
Total finite-lived intangibles	496,776		(195,222		)	301,554		448,988		(132,484		)	316,504
Total intangible assets	$	561,251	$	(195,222	)	$	366,029	$	513,463	$	(132,484	)	$	380,979

For the years ended December 31, 2018, 2017 and 2016, amortization expense, related to intangible assets was approximately $24.6 million, $27.5 million and $34.9 million, respectively. Affiliate contract expansion was amortized over the expected benefit period and was further reduced by the amount of waived management fees received from Sprint which were $37.8 million, $36.1 million and $24.6 million for the years ended December 31, 2018, 2017 and 2016, respectively. Since May 6, 2016, the date of the non-monetary exchange, waived management fees received from Sprint totaled $98.4 million.

The gross carrying amount of certain intangibles was affected by the expansion of the Company's wireless service coverage area with Sprint. See Note 4, Acquisitions for additional information.

Aggregate amortization expense, including amortization classified as a rent expense, for intangible assets for the periods shown is expected to be as follows:



Year Ending December 31,	Total		Amount Reflected as Rent Expense		Amount Reflected as Amortization Expense
(in thousands)
2019	$	21,094	$	991	$	20,103
2020	18,193		965		17,228
2021	15,477		953		14,524
2022	14,015		935		13,080
2023	13,794		924		12,870
thereafter	61,816		9,056		52,760
Total	$	144,389	$	13,824	$	130,565

Affiliate contract expansion will be further reduced by approximately $157.2 million for waived management fees as such are received from Sprint. Aggregate amortization of the unfavorable lease liability in the Wireless segment, to be classified as rent expense, is expected to be $5.1 million.