Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The carrying amount of goodwill, by operating segment is as follows:

(In thousands)	Domestic Operations		International and Other		Total
December 31, 2020	$	333,502	$	352,905	$	686,407
Goodwill written off related to spin-off of a business unit	—		(476)		(476)
Amortization of "second component" goodwill	(336)		—		(336)
Foreign currency translation	—		(2,963)		(2,963)
March 31, 2021	$	333,166	$	349,466	$	682,632

As of March 31, 2021 and December 31, 2020, accumulated impairment charges in the International and Other segment totaled $123.1 million.

The reduction of $0.3 million in the carrying amount of goodwill for Domestic Operations is due to the realization of a tax benefit for the amortization of "second component" goodwill at SundanceTV. Second component goodwill is the amount of tax deductible goodwill in excess of goodwill for financial reporting purposes. In accordance with the authoritative guidance at the time of the SundanceTV acquisition, the tax benefits associated with this excess are applied to first reduce the amount of goodwill, and then other intangible assets for financial reporting purposes, if and when such tax benefits are realized in the Company's tax returns.

The following tables summarize information relating to the Company's identifiable intangible assets:

(In thousands)	March 31, 2021
	Gross		Accumulated Amortization		Net		Estimated Useful Lives
Amortizable intangible assets:
Affiliate and customer relationships	$	621,136	$	(335,631)	$	285,505	6 to 25 years
Advertiser relationships	46,282		(27,080)		19,202		11 years
Trade names and other amortizable intangible assets	104,902		(39,590)		65,312		3 to 20 years
Total amortizable intangible assets	772,320		(402,301)		370,019
Indefinite-lived intangible assets:
Trademarks	19,900		—		19,900
Total intangible assets	$	792,220	$	(402,301)	$	389,919
(In thousands)	December 31, 2020
	Gross		Accumulated Amortization		Net
Amortizable intangible assets:
Affiliate and customer relationships	$	624,699	$	(330,350)	$	294,349
Advertiser relationships	46,282		(26,028)		20,254
Trade names and other amortizable intangible assets	116,526		(40,357)		76,169
Total amortizable intangible assets	787,507		(396,735)		390,772
Indefinite-lived intangible assets:
Trademarks	19,900		—		19,900
Total intangible assets	$	807,407	$	(396,735)	$	410,672

Aggregate amortization expense for amortizable intangible assets for the three months ended March 31, 2021 and 2020 was $9.5 million and $12.1 million, respectively. Estimated aggregate amortization expense for intangible assets subject to amortization for each of the following five years is:

(In thousands)
Years Ending December 31,
2021	$	37,433
2022	37,161
2023	37,073
2024	37,004
2025	35,203