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Accounts Receivable (Tables)
3 Months Ended
Oct. 29, 2016
Receivables [Abstract]  
Schedule of Accounts Receivable
Accounts receivable consisted of the following (dollars in thousands):
 
October 29, 2016
 
July 30, 2016
Contract billings
$
300,086

 
$
297,532

Retainage
31,289

 
32,101

Total
331,375

 
329,633

Less: allowance for doubtful accounts
(1,589
)
 
(1,603
)
Accounts receivable, net
$
329,786

 
$
328,030