Other Current Assets and Other Assets - Current (Details) - USD ($) $ in Thousands	Apr. 28, 2018	Jan. 27, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 18,461	$ 13,167
Insurance recoveries/receivables for accrued insurance claims	911	13,701
Receivables on equipment sales	1,344	31
Deposits and other current assets, including restricted cash	11,449	12,811
Total other current assets	$ 32,165	$ 39,710