Pension, SERP and Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Pension Plan [Member]
Net periodic benefit expense of Pension Plans
Service cost
Interest cost	5,854	6,373	11,708	12,746
Expected return on plan assets	(7,240)	(7,017)	(14,480)	(14,033)
Amortization of transition obligation
Amortization of net loss	2,842	1,967	5,684	3,933
Net periodic benefit expense	1,456	1,323	2,912	2,646
Old SERP [Member]
Net periodic benefit expense of Pension Plans
Service cost	38	26	76	51
Interest cost	140	155	280	310
Expected return on plan assets
Amortization of transition obligation
Amortization of net loss	119	64	238	128
Net periodic benefit expense	297	245	594	489
Postretirement Plan [Member]
Net periodic benefit expense of Pension Plans
Service cost	29	27	58	54
Interest cost	266	300	532	600
Expected return on plan assets
Amortization of transition obligation	49	65	98	131
Amortization of net loss	107	(34)	214	(69)
Net periodic benefit expense	$ 451	$ 358	$ 902	$ 716