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1/1/2011 - 4/1/2011
USD ($) / shares
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1/1/2011 - 4/1/2011
USD ($) / shares
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1/1/2011 - 4/1/2011
USD ($) / shares

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 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph A240
 -Subparagraph b(2)(c)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph A240
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1/1/2011 - 4/1/2011
USD ($) / shares

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 -Number 123R
 -Paragraph A240
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph A240
 -Subparagraph c(1)

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