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USD ($)

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USD ($)

USD ($) / shares

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 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 6
 -Subparagraph a
 -Article 5

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 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 6
 -Article 5

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 -Publisher AICPA
 -Name Accounting Research Bulletin (ARB)
 -Number 43
 -Chapter 3
 -Section A
 -Paragraph 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 6
 -Subparagraph b
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12/31/2010
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12/31/2009
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12/31/2009
USD ($)
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 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 6
 -Subparagraph a
 -Article 5

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12/31/2010
USD ($)
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12/31/2009
USD ($)
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 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 6
 -Subparagraph a
 -Article 5

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12/31/2010
USD ($)
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12/31/2009
USD ($)
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 -Number 210
 -Section 02
 -Paragraph 6
 -Subparagraph a
 -Article 5

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12/31/2009
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