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Income Taxes (Schedule of Income Taxes) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Income Tax Disclosure [Abstract]        
Income tax expense $ 581 $ 0 $ 715 $ 0
Computed income tax expense     1,700  
Excess benefits associated with equity compensation     $ 1,000