Retirement And Other Benefit Plans (Shedule of Net Benefit Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	May. 02, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,263	$ 3,329
Interest cost	3,861	3,586
Expected return on assets	(7,223)	(7,655)
Amortization of:
Actuarial loss (gain)	38	166
Prior service income	(460)	(475)
Total net periodic benefit income	(1,521)	(1,049)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	15	15
Expected return on assets	0	0
Amortization of:
Actuarial loss (gain)	(55)	(48)
Prior service income	0	0
Total net periodic benefit income	$ (40)	$ (33)