Other Current Assets and Other Assets - Current (Details) - USD ($) $ in Thousands	Jul. 25, 2020	Jan. 25, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 25,235	$ 12,769
Deposits and other current assets	23,092	17,447
Insurance recoveries/receivables for accrued insurance claims	0	0
Restricted cash	1,372	1,556
Receivables on equipment sales	141	219
Other current assets	$ 49,840	$ 31,991