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