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Restructuring (Tables)
 12 Months Ended
Jan. 26, 2020
Restructuring and Related Activities [Abstract]  
Schedule of restructuring reserve activity
Activity related to the restructuring plans is summarized as follows:
(in thousands)
One-time employee termination benefits
 
Contract commitments
 
Total
Balance at January 29, 2017
$
13

 
$
—

 
$
13

Charges
5,615

 
686

 
6,301

Cash payments
(1,565
)
 
—

 
(1,565
)
Balance at January 28, 2018
4,063

 
686

 
4,749

Charges
695

 
—

 
695

Cash payments
(4,038
)
 
(397
)
 
(4,435
)
Balance at January 27, 2019
720

 
289

 
1,009

Charges
1,483

 
683

 
2,166

Cash payments
(2,026
)
 
(911
)
 
(2,937
)
Balance at January 26, 2020
$
177

 
$
61

 
$
238