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Goodwill and Intangibles (Tables)
 3 Months Ended
Nov. 30, 2014
Finite-Lived Intangible Assets [Line Items]  
Schedule of Goodwill [Table Text Block]
 
Energy
 
Ag
 
Corporate
and Other
 
Total
 
(Dollars in thousands)
Balances, August 31, 2014
$
552

 
$
151,246

 
$
6,898

 
$
158,696

Goodwill acquired during the period
—

 
388

 
—

 
388

Effect of foreign currency translation adjustments
—

 
(2,025
)
 
—

 
(2,025
)
Balances, November 30, 2014
$
552

 
$
149,609

 
$
6,898

 
$
157,059
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
 
(Dollars in thousands)
Year 1
$
7,018

Year 2
6,533

Year 3
4,706

Year 4
3,635

Year 5
3,282
Schedule of Intangible Assets and Goodwill [Table Text Block]
 
November 30,
2014
 
August 31,
2014
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
(Dollars in thousands)
Customer lists
$
70,153

 
$
(27,280
)
 
$
42,873

 
$
69,862

 
$
(26,114
)
 
$
43,748

Trademarks and other intangible assets
41,386

 
(30,208
)
 
11,178

 
41,293

 
(29,587
)
 
11,706

Total intangible assets
$
111,539

 
$
(57,488
)
 
$
54,051

 
$
111,155

 
$
(55,701
)
 
$
55,454