GOODWILL AND PURCHASED INTANGIBLE ASSETS

Goodwill

Goodwill as of March 31, 2018, and 2019, was $15.5 million and $1.3 billion, respectively. The increase in goodwill in the fiscal year ended March 31, 2019 is due to the Acquisition of Polycom on July 2, 2018. Refer to Note 4, Acquisition in the Notes to the Consolidated Financial Statements for more details.

In Fiscal Years 2018 and 2019, for purposes of the annual goodwill impairment test, the Company determined there to be no reporting units below its single operating segment; therefore, the annual goodwill impairment analysis was performed at the segment level in both of these years. In the fourth quarter of Fiscal Years 2018 and 2019, the Company evaluated qualitative factors that may affect the fair value of the reporting unit and concluded there to be no indication of goodwill impairment.

Other Intangible Assets

Other intangible assets consist primarily of existing technology customer relationships, and trade name acquired in business combinations. During Fiscal Year 2019, approximately $28.1 million of in-process research and development was completed and reclassified to existing technology. Intangibles are amortized on a straight-line basis over the respective estimated useful lives of the assets. Amortization is charged to cost of sales and operating expenses in the Consolidated Statement of Operations.

The carrying value of other intangible assets, excluding fully amortized intangible assets as of March 31, 2019, is set forth in the following table:



(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life
Amortizing Assets
Existing technology	$	566,881	$	86,301	$	480,580	4.2 years
Customer relationships	245,481		36,245		209,236		4.8 years
Trade name	115,600		9,633		105,967		8.3 years
Non-amortizing assets
In-process R&D	29,892		—		29,892		N/A
Total intangible assets	$	957,854	$	132,179	$	825,675	4.9 years

There were no unamortized intangible assets as of March 31, 2018. In Fiscal Years 2017 and 2018 the Company recognized immaterial amortization expense. In Fiscal Year 2019, the Company recognized $160.3 million of amortization expense.

As of March 31, 2019, expected amortization expense for other intangible assets for each of the next five years and thereafter is as follows:



in thousands	Amount
2020	$	179,253
2021	174,411
2022	160,128
2023	156,419
2024	75,012
Thereafter	50,103
	$	795,326