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12/31/2010
USD ($)

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12/31/2010
USD ($)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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 -Paragraph 19, 22
 -Article 5

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12/31/2010
USD ($)

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http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 129
 -Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 19, 22
 -Article 5

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12/31/2010
USD ($)

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 -Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 19, 22
 -Article 5

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12/31/2010
USD ($)

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