Annual report pursuant to Section 13 and 15(d)

Derivative Instruments (Summary Of Fair Value And Balance Sheet Locations Of Interest Rate Swaps) (Details)

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Derivative Instruments (Summary Of Fair Value And Balance Sheet Locations Of Interest Rate Swaps) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Derivative Instrument Detail [Abstract]    
Accounts payable and other liabilities $ 0 $ 1.5