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Accounts Receivable Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 26, 2019
Oct. 26, 2019
Jan. 26, 2019
Receivables [Abstract]      
Contract assets $ 343,191 $ 343,191 $ 215,849
Contract liabilities 19,893 19,893 15,125
Contract assets, net 323,298 323,298 $ 200,724
Contract with Customer, Liability, Revenue Recognized $ 1,600 $ 12,200