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Goodwill and Intangibles (Tables)
 3 Months Ended
Nov. 30, 2015
Finite-Lived Intangible Assets [Line Items]  
Schedule of Goodwill [Table Text Block]
 
Energy
 
Ag
 
Corporate
and Other
 
Total
 
(Dollars in thousands)
Balances, August 31, 2015
$
552

 
$
142,665

 
$
6,898

 
$
150,115

Effect of foreign currency translation adjustments
—

 
(497
)
 
—

 
(497
)
Balances, November 30, 2015
$
552

 
$
142,168

 
$
6,898

 
$
149,618
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
 
(Dollars in thousands)
Year 1
$
7,120

Year 2
5,408

Year 3
4,217

Year 4
3,954

Year 5
3,607
Schedule of Intangible Assets and Goodwill [Table Text Block]
 
November 30,
2015
 
August 31,
2015
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
(Dollars in thousands)
Customer lists
$
71,933

 
$
(31,917
)
 
$
40,016

 
$
70,925

 
$
(30,831
)
 
$
40,094

Trademarks and other intangible assets
42,666

 
(32,703
)
 
9,963

 
42,688

 
(32,134
)
 
10,554

Total intangible assets
$
114,599

 
$
(64,620
)
 
$
49,979

 
$
113,613

 
$
(62,965
)
 
$
50,648