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Income Taxes (Tables)
9 Months Ended
Aug. 31, 2022
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 August 31,Nine Months Ended August 31,
 2022202120222021
Income tax expense $70,900 $24,100 $186,900 $80,900 
Effective tax rate
21.7 %13.8 %23.7 %17.2 %