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Stock-Based Compensation (Summary of Stock-Based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock-based compensation expense $ 2,607 [1] $ 2,538 [1] $ 2,152 [1]
Stock Option [Member]
      
Stock-based compensation expense 2,017 1,897 1,870
Restricted Stock [Member]
      
Stock-based compensation expense 28 0 0
ESPP [Member]
      
Stock-based compensation expense $ 562 $ 641 $ 282
[1] Stock-based compensation expense is recorded in the selling, general and administrative caption in our consolidated statements of comprehensive income.