Employee Benefit Plans (Details) (USD $)	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended
	Jan. 31, 2015	Nov. 30, 2014	Jan. 31, 2014	Jan. 31, 2015
Defined Contribution Plan Disclosure [Line Items]
Deferred compensation plan liability	$ 4,800,000
Qualified Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	3,050,000		2,750,000
Interest cost	2,975,000		2,950,000
Expected return on plan assets	(5,925,000)		(5,700,000)
Amortization of prior service (credit) cost	(550,000)		(550,000)
Amortization of actuarial loss	2,050,000		1,875,000
Total	1,600,000		1,325,000
Employer contribution amount		10,000,000
Non Qualified Pension [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0		0
Interest cost	52,000		45,000
Expected return on plan assets	0		0
Amortization of prior service (credit) cost	58,000		20,000
Amortization of actuarial loss	21,000		12,000
Total	131,000		77,000
Additional contribution amounts	383,000
Employer contribution amount	100,000
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	295,000		277,000
Interest cost	369,000		362,000
Expected return on plan assets	(459,000)		(457,000)
Amortization of prior service (credit) cost	0		0
Amortization of actuarial loss	7,000		0
Total	212,000		182,000
Additional contribution amounts	1,500,000
Pension Plan [Member] | MPP Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer contribution to plan				1,400,000
Other Postretirement Benefit Plan [Member] | DCR Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer contribution to plan	500,000
Other Postretirement Benefit Plan [Member] | Voluntary Deferral Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Employer contribution to plan	$ 0