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Series A Notes, Net Of Current Maturities (Schedule Of Series A Notes, Net Of Current Maturities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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Series A Notes, Net Of Current Maturities [Abstract] |  |  |
Series A Notes | $ 259,094 |  |
Less - Current maturities | (29,612) |  |
Carrying amount adjustments on Series A Notes | 7,412 | [1] |
Discount on Series A Notes | (1,575) |  |
Series A Notes, net of current maturities | $ 235,319 |  | $ 273,357
[1] | As a result of fair value hedge accounting, described below, and in Notes 2(Y) and 2(AA). The carrying value of the Series A Notes is adjusted for changes in the interest rates.

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