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INTANGIBLE ASSETS AND GOODWILL (Tables)

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The Company's intangible assets at March 31, 2022 and December 31, 2021 consisted of the following (in thousands):

March 31, 2022			Weighted average amortization period (years)						Cost						Accumulated amortization						Net carrying value
In-process research and development			*						$	34,000					$	—					$	34,000
Developed technology			7.93						306,380						189,660						116,720
Customer relationships			11.86						268,140						84,651						183,489
Trade names			3.88						5,000						4,021						979
Internal use software			3.00						730						730						—
			9.17						$	614,250					$	279,062					$	335,188

December 31, 2021			Weighted average amortization period (years)						Cost						Accumulated amortization						Net carrying value
In-process research and development			*						$	34,000					$	—					$	34,000
Developed technology			7.93						306,380						181,393						124,987
Customer relationships			11.86						268,140						77,653						190,487
Trade names			3.88						5,000						3,744						1,256
Internal use software			3.00						730						730						—
			9.17						$	614,250					$	263,520					$	350,730

* An in-process research and development intangible asset has an indefinite life until the product is generally available, at which time such asset is typically reclassified to developed technology.

Schedule of Estimated Future Amortization Expense for Intangible Assets

Estimated future amortization expense for the Company's intangible assets at March 31, 2022 was as follows (in thousands):

Years ending December 31,
Remainder of 2022			$	44,907
2023			53,966
2024			46,899
2025			40,338
2026			36,489
2027			31,634
Thereafter			80,955
			$	335,188

Schedule of Goodwill

There were no changes to the carrying value of the Company's goodwill in the three months ended March 31, 2022 or

2021. The components of goodwill at March 31, 2022 and March 31, 2021 were as follows (in thousands):

			Cloud and Edge						IP Optical Networks						Total
Balance at March 31, 2022
Goodwill			$	392,302					$	191,996					$	584,298
Accumulated impairment losses			(167,406)						(116,000)						(283,406)
			$	224,896					$	75,996					$	300,892
Balance at March 31, 2021
Goodwill			$	392,302					$	191,996					$	584,298
Accumulated impairment losses			(167,406)						—						(167,406)
			$	224,896					$	191,996					$	416,892

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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
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Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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-SubTopic 30
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