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Income Taxes (Schedule Of Roll Forward Of Valuation Allowance For Deferred Income Tax Assets) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Abstract]      
Valuation Allowance, Balance at beginning of period $ 17,610 $ 18,504 $ 21,504
Charged (Credited) to Costs and Expenses (490) (1,300) (3,000)
Other Adjustments   406 [1]  
Valuation Allowance, Balance at end of period $ 17,120 $ 17,610 $ 18,504
[1] Increase in valuation allowance due to the acquisition of certain deferred tax assets where the more likely than not criteria was not met.