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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Taxes [Abstract]        
Income tax expense (benefit) on operations $ 1,450 $ 3,467 $ 12,351 $ 10,520
Effective income tax rate 17.90% 20.70% 18.00% 20.10%