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INCOME TAXES
6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
INCOME TAXES INCOME TAXES
Effective income tax rate
 
Six Months Ended  
June 30,
(Dollars in thousands)
2019
 
2018
(Benefit from) income taxes
$
(25,638
)
 
$
(15,103
)
Effective income tax rate
30
%
 
113
%

During the six months ended June 30, 2019, the Company’s effective income tax rate decreased primarily due to the Global Intangible Low-Taxed Income (“GILTI”) and Foreign Derived Intangible Income (“FDII”) provisions of the Tax Reform Act. The Company’s effective income tax rate was also affected by excess tax benefits from stock-based compensation, an increase in U.S. research and development tax credits, and a decrease in uncertain tax positions as a result of the lapse of the statute of limitations on certain foreign reserves.