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Schedule of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 543,236 | $ 537,366
Accumulated Amortization | 290,945 | 218,499
Net Carrying Amount | 252,291 | 318,867
Weighted Average Useful Life, years | 7 years | 7 years
Developed technology |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 362,055 | 357,555
Accumulated Amortization | 193,756 | 143,126
Net Carrying Amount | 168,299 | 214,429
Weighted Average Useful Life, years | 6 years 3 months 18 days | 6 years 3 months 18 days
Customer Relationships |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 146,341 | 144,971
Accumulated Amortization | 81,742 | 63,464
Net Carrying Amount | 64,599 | 81,507
Weighted Average Useful Life, years | 8 years | 8 years
Tradenames and trademarks |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 33,840 | 33,840
Accumulated Amortization | 14,447 | 10,909
Net Carrying Amount | 19,393 | 22,931
Weighted Average Useful Life, years | 9 years | 9 years
Customer backlog |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 1,000 | 1,000
Accumulated Amortization | $ 1,000 | $ 1,000
Weighted Average Useful Life, years | 4 months 24 days | 4 months 24 days

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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 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/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 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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