Components of Accumlated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 02, 2015	May 03, 2014	Jan. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 0	$ (5,022)	$ 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax, Foreign currency translation	0	(39)	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax, Foreign currency translation	0	5,061	0
Foreign currency translation	0	5,022	0
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	0	0	0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(14,656)	(8,489)	(8,285)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax, Pension and Other Postretirement Benefit Plans	356	0	(8,180)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax, Pension and Other Postretirement Benefit Plans	(303)	(204)	(1,809)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	659	204	(6,371)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(13,997)	(8,285)	(14,656)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,656)	(13,511)	(8,285)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	356	(39)	(8,180)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	303	5,265	1,809
Total other comprehensive (loss) income	659	5,226	(6,371)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (13,997)	$ (8,285)	$ (14,656)