Goodwill and Other Intangible Assets Components of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Amortized:
Gross amortized other intangible assets	$ 75,807	$ 77,869
Accumulated Amortization	(24,436)	(23,158)
Net amortized other intangible assets	51,371us-gaap_FiniteLivedIntangibleAssetsNet	54,711us-gaap_FiniteLivedIntangibleAssetsNet
Total other intangible assets, net	96,158	100,935
Non-compete agreements
Amortized:
Total estimated life	5 years
Gross amortized other intangible assets	540	540
Dealer/customer related
Amortized:
Total estimated life	7 years
Gross amortized other intangible assets	58,122	62,758
Developed technology
Amortized:
Gross amortized other intangible assets	17,145	14,571
Developed technology \| Minimum
Amortized:
Total estimated life	5 years
Developed technology \| Maximum
Amortized:
Total estimated life	7 years
Brand names
Non-amortizable—indefinite lived:
Non-amortizable, Net	$ 44,787	$ 46,224

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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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

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ 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 (b)

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

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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

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