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USD ($)

USD ($) / shares

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph A240
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1/1/2011 - 3/31/2011
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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
 -Paragraph A240
 -Subparagraph a

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1/1/2011 - 3/31/2011
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 -Number 123R
 -Paragraph A240
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 -Number 123R
 -Paragraph A240
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1/1/2011 - 3/31/2011
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 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 123R
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 -Subparagraph a

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