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Income Taxes (Tables)
3 Months Ended
Feb. 29, 2020
Income Tax Disclosure [Abstract]  
Income tax benefit computed at the statutory U.S federal income tax rate and income tax benefit (expense) provided in the consolidated statements of operations Our income tax expense and effective tax rates were as follows (dollars in thousands):
 
Three Months Ended
 
February 29, 2020
 
February 28, 2019
Income tax expense
$
9,100

 
$
4,500

Effective tax rate
13.2
%
 
13.0
%