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Goodwill and Intangibles (Notes)
6 Months Ended
Feb. 29, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Other Intangible Assets

Goodwill of $154.2 million and $150.1 million on February 29, 2016 and August 31, 2015, respectively, is included in other assets on our Consolidated Balance Sheets. Changes in the net carrying amount of goodwill for the six months ended February 29, 2016, by segment, are as follows:
 
Energy
 
Ag
 
Corporate
and Other
 
Total
 
(Dollars in thousands)
Balances, August 31, 2015
$
552

 
$
142,665

 
$
6,898

 
$
150,115

Goodwill acquired during the period

 
5,667

 

 
5,667

Effect of foreign currency translation adjustments

 
(760
)
 

 
(760
)
Other

 
(782
)
 

 
(782
)
Balances, February 29, 2016
$
552

 
$
146,790

 
$
6,898

 
$
154,240



No goodwill has been allocated to our Nitrogen Production segment, which consists of a single investment accounted for under the equity method.
    
Intangible assets subject to amortization primarily include customer lists, trademarks and agreements not to compete, and are amortized over their respective useful lives (ranging from 2 to 30 years). Information regarding intangible assets included in other assets on our Consolidated Balance Sheets is as follows:
 
February 29,
2016
 
August 31,
2015
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
Carrying Amount
 
Accumulated Amortization
 
Net
 
(Dollars in thousands)
Customer lists
$
63,355

 
$
(28,420
)
 
$
34,935

 
$
70,925

 
$
(30,831
)
 
$
40,094

Trademarks and other intangible assets
40,771

 
(31,789
)
 
8,982

 
42,688

 
(32,134
)
 
10,554

Total intangible assets
$
104,126

 
$
(60,209
)
 
$
43,917

 
$
113,613

 
$
(62,965
)
 
$
50,648



Total amortization expense for intangible assets during the three and six months ended February 29, 2016 was $2.1 million and $3.8 million, respectively. Total amortization expense for intangible assets during the three and six months ended February 28, 2015 was $1.8 million and $3.6 million, respectively. The estimated annual amortization expense related to intangible assets subject to amortization for the next five years is as follows:
 
(Dollars in thousands)
Year 1
$
4,903

Year 2
3,812

Year 3
3,810

Year 4
3,670

Year 5
3,383