Restructuring - Activity (Details) $ in Thousands	9 Months Ended
	Oct. 28, 2018 USD ($)
Restructuring Reserve [Roll Forward]
Balance at January 28, 2018	$ 4,749
Charges	443
Cash payments and adjustments	(4,357)
Balance at October 28, 2018	835
One-time employee termination benefits
Restructuring Reserve [Roll Forward]
Balance at January 28, 2018	4,063
Charges	443
Cash payments and adjustments	(3,914)
Balance at October 28, 2018	592
Contract commitments
Restructuring Reserve [Roll Forward]
Balance at January 28, 2018	686
Charges	0
Cash payments and adjustments	(443)
Balance at October 28, 2018	$ 243