Retirement and Other Benefit Plans Retirement and Other Benefit Plans (Schedule of Expected Amortization of Components of AOCI) (Details) $ in Thousands	12 Months Ended
	Jan. 28, 2017 USD ($)
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of net actuarial loss (gain)	$ 521
Amortization of net prior service cost	(1,840)
Expected amortization, net of tax:	(1,319)
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of net actuarial loss (gain)	(146)
Expected amortization, net of tax:	$ (146)