Accounting Standards (Details) - USD ($) $ in Thousands	Apr. 28, 2018	Jan. 27, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	$ 644,980	$ 318,684
Contract assets	101,163	369,472
Balances Without Adoption of ASU 2014-09
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	326,973
Contract assets	419,170
ASU 2014-09 | Adjustments for ASU 2014-09
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	318,007
Contract assets	$ (318,007)	$ 311,700