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Accounts Receivable (Tables)
6 Months Ended
Jan. 28, 2017
Receivables [Abstract]  
Schedule of Accounts Receivable
Accounts receivable consisted of the following (dollars in thousands):
 
January 28, 2017
 
July 30, 2016
Contract billings
$
279,441

 
$
297,532

Retainage
30,733

 
32,101

Total
310,174

 
329,633

Less: allowance for doubtful accounts
(1,307
)
 
(1,603
)
Accounts receivable, net
$
308,867

 
$
328,030