Business Combinations - Restructuring Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 28, 2017	Jan. 28, 2017
Restructuring Cost and Reserve [Line Items]
Total Restructuring costs identified	$ (121)
Hi-Tech
Restructuring Cost and Reserve [Line Items]
Contract termination costs	55	$ 386
Leases, net of sublease	1,126	1,920
Severance costs	746	1,270
Service costs	42	206
Total restructuring costs identified	1,969	$ 3,782
Contract termination costs	(331)
Leases, net of sublease	(794)
Severance costs	(524)
Service costs	(164)
Total Restructuring costs identified	$ (1,813)