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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]  
Schedule of operating results of income tax

The Company reported the following operating results for the periods presented (in thousands):

 
  Three Months Ended
September 30
  Nine Months Ended
September 30,
 
  2018  2017  2018  2017 
Income before income taxes $30,156  $72,504  $41,468  $61,646 
Income tax benefit  (15,652)  (14,311)  (22,106)  (12,613)
Effective income tax rate  (51.9)%  (19.7)%  (53.3)%  (20.5)%