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Derivative Financial Instruments And Fair Value Measurements (Carrying Value And Fair Value Of Senior And Subsidiary Senior Notes) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Senior Notes Due 2017 [Member] | Subsidiary [Member]
   
Debt Instrument [Line Items]    
Senior notes, Carrying Value $ 129,543 $ 129,117
Senior notes, Fair Value 140,935 136,853
Senior Notes Due 2016 [Member] | Dean Foods Company [Member]
   
Debt Instrument [Line Items]    
Senior notes, Carrying Value 499,010 498,959
Senior notes, Fair Value 513,750 493,750
Senior Notes Due 2018 [Member] | Dean Foods Company [Member]
   
Debt Instrument [Line Items]    
Senior notes, Carrying Value 400,000 400,000
Senior notes, Fair Value $ 440,000 $ 426,000