Pension and Other Post-Retirement Benefit Matters Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Jan. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 11,645	$ 26,799
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net acutarial loss	1,186
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	43,669	41,280
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(2,390)	8,135
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net acutarial loss	28
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	361	679
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 318		$ 93