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Net Income Per Share (Tables)
 6 Months Ended
Feb. 28, 2013
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
The following table sets forth the information used to compute basic and diluted net income per share attributable to SSI (in thousands):
 
Three Months Ended
 
Six Months Ended
  
2/28/2013
 
2/29/2012
 
2/28/2013
 
2/29/2012
Net income
$
8,743

 
$
10,365

 
$
7,299

 
$
18,107

Net income attributable to noncontrolling interests
(100
)
 
(735
)
 
(329
)
 
(1,462
)
Net income attributable to SSI
$
8,643

 
$
9,630

 
$
6,970

 
$
16,645

Computation of shares:
 
 
 
 
 
 
 
Weighted average common shares outstanding, basic
26,640

 
27,509

 
26,597

 
27,480

Incremental common shares attributable to dilutive stock options, performance share awards, DSUs and RSUs
141

 
272

 
154

 
254

Weighted average common shares outstanding, diluted
26,781

 
27,781

 
26,751

 
27,734