Other Current Assets and Other Assets - Non-current (Details) - USD ($) $ in Thousands	Jan. 25, 2020	Jan. 26, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Long-term contract assets	$ 22,653	$ 30,399
Deferred financing costs	7,133	9,036
Restricted cash	3,753	4,253
Insurance recoveries/receivables for accrued insurance claims	4,864	13,684
Long-term accounts receivable, net	0	24,815
Other non-current deposits and assets	9,035	7,251
Other assets	$ 47,438	$ 89,438