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Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 87,487 | $ 45,687
Accumulated Amortization | (54,366) | (41,590)
Total future amortization expense | $ 33,121 | 4,097
Developed Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 3 years 4 months 12 days |
Gross Carrying Amount | $ 33,057 | 10,987
Accumulated Amortization | (14,112) | (10,987)
Total future amortization expense | $ 18,945 | 0
Customer relationships/contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 4 years 4 months 24 days |
Gross Carrying Amount | $ 44,659 | 29,200
Accumulated Amortization | (31,004) | (25,752)
Total future amortization expense | $ 13,655 | 3,448
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Useful Life | 3 years 4 months 12 days |
Gross Carrying Amount | $ 610 |
Accumulated Amortization | (89) |
Total future amortization expense | 521 |
Maintenance agreements and related relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,500 | 5,500
Accumulated Amortization | (5,500) | (4,851)
Total future amortization expense | 0 | $ 649
Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,661 |
Accumulated Amortization | (3,661) |
Total future amortization expense | $ 0 |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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/presentationRef -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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- Definition 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/presentationRef -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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