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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Taxes [Abstract]        
Income tax expense $ 5,362 $ 2,570 $ 13,168 $ 7,109
Effective tax rate 34.40%   34.40%  
Change in effective tax rate 0.80%   1.40%