Schedule of Amortizable Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill and Other Intangible Assets [Line Items]
Cost	103,293	100,394
Accumulated Amortization	(57,629)	(43,820)
Future estimated amortization expense, total	45,664us-gaap_FiniteLivedIntangibleAssetsNet	56,574us-gaap_FiniteLivedIntangibleAssetsNet
Customer related intangibles
Goodwill and Other Intangible Assets [Line Items]
Cost	49,590	48,634
Accumulated Amortization	(24,338)	(18,317)
Future estimated amortization expense, total	25,252	30,317
Technology
Goodwill and Other Intangible Assets [Line Items]
Cost	48,342	47,102
Accumulated Amortization	(28,890)	(22,873)
Future estimated amortization expense, total	19,452	24,229
Other intangibles
Goodwill and Other Intangible Assets [Line Items]
Cost	5,361	4,658
Accumulated Amortization	(4,401)	(2,630)
Future estimated amortization expense, total	960	2,028
Minimum \| Customer related intangibles
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	4 years	4 years
Minimum \| Technology
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	3 years	3 years
Minimum \| Other intangibles
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	1 year	1 year
Maximum \| Customer related intangibles
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	9 years	9 years
Maximum \| Technology
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	9 years	9 years
Maximum \| Other intangibles
Goodwill and Other Intangible Assets [Line Items]
Range of Useful Lives	3 years	5 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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