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Accounts Receivable
12 Months Ended
Sep. 30, 2017
Receivables [Abstract]  
Accounts Receivable
4.
Accounts Receivable
 
Accounts receivable, net of the allowance for doubtful accounts, consist of the following at September 30, 2017 and 2016:
 
(Dollars in thousands)
 
2017
 
2016
 
Commercial
 
$
152,265
 
 
112,280
 
U.S. Government and prime contractors
 
 
8,315
 
 
9,206
 
Total
 
$
160,580
 
 
121,486