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Income Taxes (Schedule Of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Deferred Tax Liabilities, Net, Classification [Abstract] |  |
Gross assets | $ 2,458 | $ 2,012
Gross liabilities | (4,111) | 0
Current deferred income tax assets and liabilities | (1,653) | 2,012
Valuation allowance | 0 | 0
Current deferred income taxes | (1,653) | 2,012
Gross assets | 69,483 | 63,129
Gross liabilities | (121,317) | (149,708)
Long term deferred income tax assets and liabilities | (51,834) | (86,579)
Valuation allowance | (14,738) | (6,879)
Long term deferred income taxes | (66,572) | (93,458)
Net deferred income tax liability | $ (68,225) | $ (91,446)

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