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Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 84,375	$ 84,254
Accumulated Amortization	(51,224)	(35,310)
Net Carrying Amount	33,151	48,944
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,000	28,000
Accumulated Amortization	(26,453)	(19,710)
Net Carrying Amount	1,547	8,290
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	55,772	55,772
Accumulated Amortization	(24,484)	(15,386)
Net Carrying Amount	31,288	40,386
Internal Use Software
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	603	482
Accumulated Amortization	(287)	(214)
Net Carrying Amount	$ 316	$ 268

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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)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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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
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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Amount after 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 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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