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Summary of Significant Accounting Policies (Details) | 6 Months Ended
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Jun. 30, 2012
Summary of Significant Accounting Policies (Textual) [Abstract] |
Maturity period of short-term investments | 13 weeks
Tax benefit recognized | Greater than 50%
Minimum [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership interest in Equity Method Investment | 20.00%
Maximum [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership interest in Equity Method Investment | 50.00%

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- Definition Maturity period of short-term investments. + References No definition available. + Details
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- Details
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- Definition Tax benefit recognized. + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Details
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