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Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Tax Disclosure [Abstract]        
Current $ 2,873 $ 6,326 $ 3,433 $ 9,917
Deferred 18 (356) 438 364
Provision (benefit) for income taxes $ 2,891 $ 5,970 $ 3,871 $ 10,281