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Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 543,004 | $ 523,052
Accumulated Amortization | 303,173 | 332,452
Net Carrying Amount | $ 239,831 | $ 190,600
Weighted Average Useful Life, years | 6 years 8 months 12 days | 6 years 9 months 18 days
Developed technology |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 379,778 | $ 345,513
Accumulated Amortization | 220,306 | 224,059
Net Carrying Amount | $ 159,472 | $ 121,454
Weighted Average Useful Life, years | 6 years | 6 years 2 months 12 days
Customer Relationships |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 110,340 | $ 146,635
Accumulated Amortization | 63,718 | 93,998
Net Carrying Amount | $ 46,622 | $ 52,637
Weighted Average Useful Life, years | 7 years 10 months 24 days | 7 years 8 months 12 days
Trademarks and tradenames |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 52,396 | $ 30,414
Accumulated Amortization | 18,879 | 14,205
Net Carrying Amount | $ 33,517 | $ 16,209
Weighted Average Useful Life, years | 9 years 6 months | 9 years
Non-compete agreements |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 320 | $ 320
Accumulated Amortization | 100 | 20
Net Carrying Amount | $ 220 | $ 300
Weighted Average Useful Life, years | 4 years | 4 years
Customer backlog |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 170 | $ 170
Accumulated Amortization | $ 170 | $ 170
Weighted Average Useful Life, years | 3 months 18 days | 3 months 18 days

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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=26713463&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=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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