v2.4.0.6

Summary of Significant Accounting Policies (Narrative) (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2011
Summary Of Significant Accounting Policies [Line Items]
Percentage of holdings for consolidation					50.00%
Assets impairment charge					$ 3,300,000
Interest income on investments and excess cash balances nominal value						100,000
Impairment of intangible assets	0	3,349,000	0	3,349,000	3,349,000	0
Foreign Currency Transaction Gain (Loss), before Tax	205,000		342,000		772,000	90,000
Percentage of the estimated fair value of assets surrendered including cash					25.00%
Revenue recognized in nonmonetary transactions	500,000				1,000,000
Expense related to nonmonetary transactions	$ 400,000				$ 800,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, maximum (in years)					3 years
Revenue recognition period					3
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, estimated useful life, maximum (in years)					5 years
Revenue recognition period					24
Service Arrangements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period					2
Service Arrangements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period					1

X

- Definition

Interest income on investments and excess cash balances nominal value.

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- Definition

Percentage Of The Fair Value Of Total Exchange Value That Can Be Cash And Still Accounted For As A Non Monetary Transaction

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- Definition

Percentage of holdings for consolidation.

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- Definition

Revenue recognition period

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- Definition

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 45, 46, 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

-Paragraph 28

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- Definition

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 52

-Paragraph 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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-Publisher FASB

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- Definition

The amount of revenue and expenses for the services received and provided in a nonmonetary arrangement.

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 99-17

-Paragraph 8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

The amount of gross operating revenue recognized in a nonmonetary transaction.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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