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Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Total pre-tax stock-based compensation expense charged against income $ 1,196 [1] $ 1,144 [1]
Stock Options [Member]
    
Total pre-tax stock-based compensation expense charged against income 997 949
Restricted Stock [Member]
    
Total pre-tax stock-based compensation expense charged against income 14 0
Employee Stock Purchase Plan (ESPP) [Member]
    
Total pre-tax stock-based compensation expense charged against income $ 185 $ 195
[1] Stock-based compensation expense is recorded in the selling, general and administrative caption in our consolidated statements of comprehensive income.