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Derivative Financial Instruments (Schedule Of Gain Or Loss On The Hedged Item In The Same Line Item, Other Revenue, As The Offsetting Loss Or Gain On The Related Interest Rate Swaps) (Details) (Other Revenue [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Swaps [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) | $ (4,240) | $ (4,232) | $ (5,922)
Senior Notes [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) | $ 4,240 | $ 4,232 | $ 5,922

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- Definition Net Increase or Decrease in the fair value of the derivative or group of derivatives included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 + Details
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- Details
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