Goodwill and Identified Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes to Carrying Value of Goodwill

The changes to the carrying value of goodwill from January 1, 2021 through December 31, 2022 are reflected below (in thousands):

	Amounts
Balance at December 31, 2020 and 2021	$	314,576
Goodwill adjustment related to Mergers in prior periods		(916	)
Balance at December 31, 2022	$	313,660

Identified Intangible Assets

Identified intangible assets consisted of the following (in thousands):

		December 31, 2022							December 31, 2021
	Average Life (Years)	Gross Assets		Accumulated Amortization			Net		Gross Assets		Accumulated Amortization			Net
Finite-lived intangible assets
Acquired patents / core technology	3-10	$	645,928	$	(270,275	)	$	375,653	$	667,613	$	(219,292	)	$	448,321
Existing technology / content database	5-10		38,681		(36,614	)		2,067		38,681		(33,514	)		5,167
Customer contracts and related relationships	3-9		155,900		(101,252	)		54,648		155,900		(62,677	)		93,223
Trademarks/trade name	4-10		1,300		(1,192	)		108		1,300		(1,029	)		271
Total intangible assets		$	841,809	$	(409,333	)	$	432,476	$	863,494	$	(316,512	)	$	546,982

Estimated Future Amortization Expense

As of December 31, 2022, the estimated future amortization expense of total finite-lived intangible assets was as follows (in thousands):

	Amounts
2023	$	93,540
2024		68,809
2025		52,731
2026		52,597
2027		52,246
Thereafter		112,553
	$	432,476