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Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 408,906	$ 507,836
Accumulated Amortization	(307,347)	(375,008)
Foreign Currency Translation Adjustment	(620)	(7,348)
Net Carrying Amount	100,939	125,480
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	272,547	361,787
Accumulated Amortization	(210,479)	(279,000)
Foreign Currency Translation Adjustment	(1,610)	(5,709)
Net Carrying Amount	60,458	77,078
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	66,239	75,669
Accumulated Amortization	(54,524)	(59,077)
Foreign Currency Translation Adjustment	305	(455)
Net Carrying Amount	12,020	16,137
Trademarks and tradenames
Finite-Lived Intangible Assets
Gross Carrying Amount	70,120	70,120
Accumulated Amortization	(42,344)	(36,671)
Foreign Currency Translation Adjustment	685	(1,184)
Net Carrying Amount	$ 28,461	32,265
Backlog
Finite-Lived Intangible Assets
Gross Carrying Amount		260
Accumulated Amortization		$ (260)

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 340
-Section 50
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-Name Accounting Standards Codification
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