Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

As of December 31, goodwill was as follows:


Goodwill	Integrated Networks - Group A		Integrated Networks -Group B		Media & Data Network		All Other		Total
Balance at December 31, 2018	$	139,452	$	267,059	$	101,768	$	224,473	$	732,752
Acquired goodwill	—		1,025		—		—		1,025

Impairment loss recognized	(4,879)		—		—		—		(4,879)
Transfer of goodwill between segments (1)	—		(120)		3,612		(3,492)		—

Foreign currency translation	—		423		217		2,153		2,793
Balance at December 31, 2019	$	134,573	$	268,387	$	105,597	$	223,134	$	731,691
Acquired goodwill	—		—		—		—		—
Disposition	—		—		—		(7,074)		(7,074)
Impairment loss recognized	—		(16,137)		(5,287)		(40,237)		(61,661)
Transfer of goodwill between segments	—		19,696		4,546		(24,242)		—

Foreign currency translation	—		212		538		4,505		5,255
Balance at December 31, 2020	$	134,573	$	272,158	$	105,394	$	156,086	$	668,211

(1) Transfers of goodwill relate to changes in segments.

For the twelve months ended December 31, 2020, the Company recognized an impairment charge of $61,661 to write-down the carrying value of goodwill in excess of the fair value at four reporting units, one in the Integrated Networks - Group B reportable segment, one in Media & Data Network reportable segment and two within the All Other category.

As of December 31, 2020, there were two reporting units with negative net asset carrying value in the Integrated Networks - Group A reportable segment and the All Other category. The goodwill allocated to these reporting units is $14,854 and $5,479, respectively.

For the twelve months ended December 31, 2019, the Company recognized an impairment charge of $4,879 to write-down the carrying value of goodwill in excess of the fair value at one reporting unit within the Integrated Networks - Group A.

For the twelve months ended December 31, 2018, the Company recognized an impairment of goodwill and other assets of $87,204 primarily to write-down the carrying value of goodwill in excess of the fair value at three reporting units, one in each of the Integrated Networks - Group B reportable segment, the Media & Data Network reportable segment and within the All Other category.

The total accumulated goodwill impairment charges as of December 31, 2020 and 2019, were $238,965 and $177,304, respectively.

The gross and net amounts of acquired intangible assets other than goodwill as of December 31,


Intangible Assets	2020		2019

Trademark (indefinite life)	$	—	$	14,600

Customer relationships – gross	$	52,594	$	58,211
Less accumulated amortization	(32,667)		(32,671)
Customer relationships – net	$	19,927	$	25,540

Trademarks (definite life) – gross	$	32,711	$	28,695
Less accumulated amortization	(18,794)		(13,942)
Trademarks (definite life) – net	$	13,917	$	14,753

Total intangible assets	$	85,305	$	101,506
Less accumulated amortization	(51,461)		(46,613)
Total intangible assets – net	$	33,844	$	54,893

During the first quarter of 2020, the Company reassessed its estimate of the useful life of a trademark in the amount of $14,600, acquired as a result of a business combination. The Company revised the useful life to five years from indefinite lived.

During the fourth quarter of 2020, the Company recognized an impairment of two trademarks totaling $12,071, equal to the excess carrying value above the fair value for a reporting unit within the Integrated Networks - Group B reportable segment and a reporting unit within the All Other category. The intangible assets impairment is included in Impairment and other losses in the Consolidated Statement of Operations.

The weighted average amortization period for customer relationships is eight years and trademarks is nine years. In total, the weighted average amortization period is eight years. Amortization expense related to amortizable intangible assets for the years ended December 31, 2020, 2019, and 2018 was $11,260, $11,828, and $17,290, respectively.

The estimated amortization expense for the five succeeding years is as follows:


Year	Amortization
2021	$	8,514
2022	8,062
2023	7,711
2024	4,558
Thereafter	4,999