Acquired Intangible Assets and Capitalized Software Development Costs (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, accumulated amortization	$ 14,897	$ 13,970
Acquired intangible assets, Net	16,279us-gaap_FiniteLivedIntangibleAssetsNet	17,206us-gaap_FiniteLivedIntangibleAssetsNet
Capitalized software development costs, Gross Carrying Amount	8,086	7,680
Capitalized software development costs, accumulated amortization	3,459	3,072
Capitalized software development costs, Net	4,627us-gaap_CapitalizedComputerSoftwareNet	4,608us-gaap_CapitalizedComputerSoftwareNet
Intangible assets and capitalized software development costs, Gross Carrying Amount	39,262	38,856
Intangible assets and capitalized software development costs, Accumulated Amortization	18,356	17,042
Intangible assets and capitalized software development costs, Net	20,906	21,814
Acquired intangible assets including customer lists
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets, Gross Carrying Amount	31,176	31,176
Acquired intangible assets, accumulated amortization	14,897	13,970
Acquired intangible assets, Net	$ 16,279	$ 17,206

Total accumulated amortization on acquired intangible assets and software developments costs.

No definition available.

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- Definition

Total acquired intangible assets and software developments costs gross.

+ References

No definition available.

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- Definition

Total acquired intangible assets and software developments costs net.

+ References

No definition available.

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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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)

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

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- Definition

Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

+ References

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- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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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

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

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