Intangible Assets Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

Intangible assets are summarized as follows (in thousands):

	Weighted Average Estimated Useful Life	December 31,
		2020		2019
Product technology	8 years	$	214,363	$	207,511
Customer relationships	11 years	70,616		67,274
Trademarks and trade name portfolios	8 years	18,598		18,557
Trade name portfolio not subject to amortization	indefinite	34,023		32,076
In-process research and development	8 years	33,900		34,698
Other	8 years	10,921		10,756
Acquired identifiable intangibles		382,421		370,872
Less accumulated amortization		(172,958)		(124,411)
Net acquired identifiable intangibles		209,463		246,461
Patents	9 years	299		6,075
Less accumulated amortization		(177)		(5,109)
Net patents		122		966
Acquired in-place leases and other	10 years	141		441
Less accumulated amortization		(90)		(354)
Net acquired in-place leases and other		51		87
		$	209,636	$	247,514

Estimated future aggregate amortization expense

For intangible assets recorded at December 31, 2020, the estimated future aggregate amortization expense for the years ending December 31, 2021 through 2025 is approximately (in thousands):

2021	$	46,199
2022	44,266
2023	41,016
2024	19,504
2025	8,899