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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Income Tax Expense From Continuing Operations And The Effective Tax Rate
The following table presents Income tax expense and the effective tax rate:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2019
 
2018
 
2019
 
2018
 
(Dollars in thousands)
Income tax expense
$
42,960

 
$
36,527

 
$
70,257

 
$
54,699

Effective tax rate
23
%
 
22
%
 
18
%
 
17
%