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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Income Tax Contingency [Line Items]          
Gross liability for unrecognized tax benefits, exclusive of interest and penalties $ 13,557   $ 13,557   $ 12,028
Unrecognized tax benefits that would affect effective tax rate 11,623   11,623   10,139
Interest and penalties on unrecognized benefits 967   967   754
Effective tax rates 34.70% 28.50% 35.40% 33.30%  
Settlement and Lapse of Statute [Member]
          
Income Tax Contingency [Line Items]          
Unrecognized tax benefits within the next twelve months $ 3,254   $ 3,254