Components of Accumlated Other Comprehensive Income Components of Accumlated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Jan. 28, 2012
Accumulated Other Comprehensive Income [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (1,050)	$ 0	$ 0
Foreign currency translation	659	0	(1,050)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(391)	0	(1,050)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(14,469)	(10,470)	(10,258)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	412	212	(4,211)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(14,057)	(10,258)	(14,469)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(15,519)	(10,470)	(10,258)
Other Comprehensive Income (Loss), Net of Tax	1,071	212	(5,261)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (14,448)	$ (10,258)	$ (15,519)