XML 59 R47.htm IDEA: XBRL DOCUMENT v3.19.2
Accounts Receivable (Details) - USD ($)
$ in Thousands
Jul. 27, 2019
Apr. 27, 2019
Jan. 26, 2019
Jul. 28, 2018
Apr. 28, 2018
Jan. 27, 2018
Receivables [Abstract]            
Contract with Customer, Asset, Net $ 344,343   $ 200,724      
Trade accounts receivable 310,934   331,903      
Unbilled accounts receivable 476,682   283,463      
Retainage 10,216   10,831      
Total 797,832   626,197      
Less: allowance for doubtful accounts (924) $ (1,372) (17,702) $ (948) $ (976) $ (998)
Allowance for Doubtful Accounts Receivable, Current     939      
Accounts receivable, net $ 796,908   $ 625,258