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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Income tax expense $ 4,938 $ 2,905  
Income before income taxes $ 15,948 $ 13,051  
Effective tax rate (percent) 31.00% 22.10%  
Unrecognized tax benefits $ 5,200   $ 4,800