Retirement Benefit Plans Benefit plan liabilities (Details) (USD $) In Thousands, unless otherwise specified	Nov. 01, 2014	Feb. 01, 2014	Nov. 02, 2013
Defined Benefit Plan Disclosure [Line Items]
Retirement benefit plan liabilities	$ 11,651	$ 14,601	$ 14,172
Long-term retirement benefit plan liabilities	5,841	14,339	14,172
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Retirement benefit plan liabilities	7,511	10,551	10,434
Amount classified in accrued expenses	5,810	0	0
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Retirement benefit plan liabilities	4,140	4,050	3,738
Amount classified in accrued expenses	$ 0	$ 262	$ 0