Leases (Narrative) (Details) $ in Millions	12 Months Ended
	Jan. 28, 2017 USD ($)
Operating Leased Assets [Line Items]
Future minimum sublease rental income	$ 2.3
Manufacturing Facility [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	8 years
Office Building [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	10 years
Minimum [Member] | Retail Site [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	5 years
Minimum [Member] | Office Building [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	5 years
Maximum [Member] | Retail Site [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract	10 years
Leases subject to renewal options, percentage	49.00%
Maximum [Member] | Office Building [Member]
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	20 years