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Accounts Receivable
 3 Months Ended
Oct. 24, 2015
Receivables [Abstract]  
Accounts Receivable
Accounts Receivable
 
Accounts receivable consisted of the following:
 
October 24, 2015
 
July 25, 2015
 
(Dollars in thousands)
Contract billings
$
335,812

 
$
292,029

Retainage
27,509

 
24,321

Total
363,321

 
316,350

Less: allowance for doubtful accounts
(1,686
)
 
(1,216
)
Accounts receivable, net
$
361,635

 
$
315,134


 
The Company grants credit under normal payment terms, generally without collateral, to its customers. The Company expects to collect the outstanding balance of accounts receivable, net (including retainage) within the next twelve months. The increase in accounts receivable and retainage during the three months ended October 24, 2015 is the result of higher levels of work performed. The Company maintains an allowance for doubtful accounts for estimated losses on uncollected balances. During the three months ended October 24, 2015 and October 25, 2014, write-offs to the allowance for doubtful accounts, net of recoveries, were not material. During the three months ended October 24, 2015, the Company collected all past due receivables outstanding as of July 25, 2015 from a customer for a project funded by the Rural Utilities Service of the United States Department of Agriculture under the American Recovery and Reinvestment Act of 2009. As of October 24, 2015, there were no material accounts receivable amounts representing claims or other similar items subject to uncertainty.