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Income Taxes (Tables)
 6 Months Ended
Feb. 28, 2018
Income Tax Disclosure [Abstract]  
Schedule Of Provision (Benefit) For Income Taxes And Effective Income Tax Rate
The following table presents the Company’s provision for income taxes and effective income tax rate for the periods below:

 
Three months ended
February 28,
 
Six months ended
February 28,

 
2018
 
2017
 
2018
 
2017
Provision for income taxes
 
$
(13,686
)
 
$
4,699

 
$
(9,961
)
 
$
11,938

Effective income tax rate
 
(231.1
)%
 
30.0
%
 
(47.3
)%
 
33.1
%
Schedule of Effective Income Tax Rate Reconciliation
The difference between our U.S. federal statutory income tax rate and our effective income tax rate for the six months ended February 28, 2018 and 2017 is summarized below:

 
Six months ended
February 28, 2018
 
Six months ended
February 28, 2017
U.S. federal statutory income tax rate
25.7
 %
 
35.0
 %
State income taxes, net of federal tax benefit
3.9
 %
 
2.9
 %
Federal tax benefit of statutory tax deduction
(1.5
)%
 
(1.4
)%
Employment related and other tax credits, net
(1.6
)%
 
(1.7
)%
Stock option excess tax benefit
(6.6
)%
 
(2.1
)%
Deferred tax revaluation
(67.0
)%
 
—
 %
Other
(0.2
)%
 
0.4
 %
Effective tax rate
(47.3
)%
 
33.1
 %