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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Feb. 28, 2019
Finite-Lived Intangible Assets [Line Items]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
 
February 28,
2019
 
August 31,
2018
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net
 
(Dollars in thousands)
Customer lists
$
40,815

 
$
(14,500
)
 
$
26,315

 
$
40,815

 
$
(13,082
)
 
$
27,733

Trademarks and other intangible assets
6,536

 
(5,038
)
 
1,498

 
6,536

 
(4,931
)
 
1,605

Total intangible assets
$
47,351

 
$
(19,538
)
 
$
27,813

 
$
47,351

 
$
(18,013
)
 
$
29,338
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
 
(Dollars in thousands)
Year 1
$
3,034

Year 2
2,958

Year 3
2,877

Year 4
2,787

Year 5
2,667