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Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]        
Effective tax rate (12.90%) (2.00%) (4.20%) (7.10%)
Tax benefit for refunds of foreign withholding tax, partially offset by state and foreign tax expense     $ 0