Retirement and Other Benefit Plans (Shedule of Net Benefit Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,097	$ 2,383	$ 4,479	$ 4,850
Interest cost	3,550	3,727	7,091	7,474
Expected return on assets	(7,272)	(6,913)	(14,504)	(13,793)
Amortization of:
Actuarial loss (gain)	1,048	996	2,061	2,148
Prior service income	(386)	(461)	(784)	(896)
Total net periodic benefit (income) cost	(963)	(268)	(1,657)	(217)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	14	16	29	34
Amortization of:
Actuarial loss (gain)	(32)	(35)	(62)	(73)
Total net periodic benefit (income) cost	$ (18)	$ (19)	$ (33)	$ (39)