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Income Taxes (Tables)
 6 Months Ended
Feb. 28, 2013
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
A reconciliation of the difference between the federal statutory rate and the Company’s effective rate is as follows:
 
Three Months Ended
 
Six Months Ended
 
2/28/2013
 
2/29/2012
 
2/28/2013
 
2/29/2012
Federal statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
State taxes, net of credits
(0.5
)
 
(3.7
)
 
(1.0
)
 
(1.5
)
Foreign income taxed at different rates
0.6

 
0.2

 
0.7

 
(0.6
)
Section 199 deduction
(11.9
)
 
(1.2
)
 
(12.9
)
 
(1.4
)
Non-deductible officers’ compensation
0.5

 
0.9

 
0.6

 
0.8

Noncontrolling interests
(2.2
)
 
(2.3
)
 
(5.1
)
 
(2.2
)
Research and development credits
(2.2
)
 
—

 
(3.6
)
 
—

Valuation allowance on deferred tax assets
(16.8
)
 
—

 
—

 
—

Foreign interest income
—


2.0

 
—

 
1.2

Other
0.2

 
0.6

 
0.5

 
0.2

Effective tax rate
2.7
 %
 
31.5
 %
 
14.2
 %
 
31.5
 %