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Commitments and Contingencies (Tables)
 3 Months Ended
Nov. 30, 2019
Commitments And Contingencies Disclosure [Abstract]  
Summary of Undiscounted Environmental Remediation Liability Classifications The following table summarizes the undiscounted environmental remediation liability classifications included in the condensed consolidated balance sheets as of November 30, 2019, November 30, 2018, and August 31, 2019:

 

($ in thousands)

 

November 30,

2019

 

 

November 30,

2018

 

 

August 31,

2019

 

Other current liabilities

 

$

1,243

 

 

$

1,243

 

 

$

1,243

 

Other noncurrent liabilities

 

 

14,548

 

 

 

15,142

 

 

 

14,674

 

Total environmental remediation liabilities

 

$

15,791

 

 

$

16,385

 

 

$

15,917