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USD ($) / shares

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USD ($)

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USD ($)

USD ($) / shares

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1/1/2010 - 12/31/2010
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{us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis} : Interest Rate Contract [Member]
12/27/2008 - 12/31/2009
USD ($)
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12/29/2007 - 12/26/2008
USD ($)
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{us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis} : Interest Rate Contract [Member]
12/31/2010
USD ($)
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12/31/2009
USD ($)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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