Retirement And Other Benefit Plans (Shedule of Net Benefit Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,904	$ 2,993	$ 4,167	$ 6,322
Interest cost	3,810	3,578	7,671	7,164
Expected return on assets	(7,252)	(8,190)	(14,475)	(15,845)
Amortization of:
Actuarial loss (gain)	39	143	77	309
Prior service income	(461)	(481)	(921)	(956)
Settlement cost	250	0	250	0
Total net periodic benefit income	(1,710)	(1,957)	(3,231)	(3,006)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	15	14	30	28
Expected return on assets	0	0	0	0
Amortization of:
Actuarial loss (gain)	(55)	(63)	(110)	(111)
Prior service income	0	0	0	0
Settlement cost	0	0	0	0
Total net periodic benefit income	$ (40)	$ (49)	$ (80)	$ (83)