Restructuring and Strategic Charges - Summary of Restructuring and Strategic Charges (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Restructuring Cost and Reserve [Line Items]
Impairment charges		$ 1,453,000		$ 1,453,000
Total restructuring and strategic charges, pre-tax	$ 0	16,556,000	$ 0	20,207,000
Continuing employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		0		1,015,000
Severance charges
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		8,236,000		9,420,000
Proxy solicitation costs
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		4,524,000		5,589,000
Lease termination charges
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		127,000		348,000
Outside Services
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		2,234,000		2,234,000
Other charges
Restructuring Cost and Reserve [Line Items]
Restructuring and strategic charges, pre-tax		$ (18,000)		$ 148,000