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Fair Value Measurement (Schedule Of Fair Value Of Debt) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Fair Value Measurements [Line Items]  
Fair value of debt $ 1,155,082
Fair Value, Inputs, Level 1 [Member]
 
Fair Value Measurements [Line Items]  
Fair value of debt 773,404
Fair Value, Inputs, Level 2 [Member]
 
Fair Value Measurements [Line Items]  
Fair value of debt $ 381,678