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USD ($)

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4/1/2011
USD ($)

USD ($) / shares

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12/31/2010
USD ($)

USD ($) / shares
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 -Name Statement of Financial Accounting Standard (FAS)
 -Number 129
 -Paragraph 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
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 -Paragraph 10

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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 -Name Regulation S-X (SX)
 -Number 210
 -Section 04
 -Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 30
 -Article 5

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4/1/2011
USD ($)

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12/31/2010
USD ($)

USD ($) / shares
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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 -Name Regulation S-X (SX)
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 -Paragraph 30
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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