Schedule of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 523,052	$ 515,464
Accumulated Amortization	332,452	263,173
Net Carrying Amount	190,600	252,291
Weighted Average Useful Life, years	6 years 9 months 18 days	6 years 10 months 24 days
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	345,513	342,933
Accumulated Amortization	224,059	174,563
Net Carrying Amount	121,454	168,370
Weighted Average Useful Life, years	6 years 2 months 12 days	6 years 2 months 12 days
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	146,635	141,497
Accumulated Amortization	93,998	76,963
Net Carrying Amount	52,637	64,534
Weighted Average Useful Life, years	7 years 8 months 12 days	8 years
Tradenames and trademarks
Finite-Lived Intangible Assets
Gross Carrying Amount	30,414	30,034
Accumulated Amortization	14,205	10,647
Net Carrying Amount	16,209	19,387
Weighted Average Useful Life, years	9 years	9 years 1 month 6 days
Customer backlog
Finite-Lived Intangible Assets
Gross Carrying Amount	170	1,000
Accumulated Amortization	170	1,000
Weighted Average Useful Life, years	0 years	4 months 24 days
Non Compete
Finite-Lived Intangible Assets
Gross Carrying Amount	320
Accumulated Amortization	20
Net Carrying Amount	$ 300
Weighted Average Useful Life, years	4 years

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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