1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 6

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph E1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Employee Retirement and Deferred Compensation Plans Employee Retirement and Deferred Compensation Plans (Details Textual) (USD $)	9 Months Ended	12 Months Ended
	Jul. 31, 2011	Dec. 31, 2012	Oct. 31, 2012	Dec. 31, 2011	Oct. 31, 2011	Dec. 31, 2010	Oct. 31, 2010	Oct. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Number of Unfunded Defined Benefit Retirement Plans			2
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			3.07%		4.06%		4.99%
Company Discretionary Contribution Under Deferral Savings Plans		2.00%		1.00%		1.00%
Defined Contribution Plan, Employer Matching Contribution, Percent	1.00%		2.00%
Defined Contribution Plan, Cost Recognized			$ 5,000,000		$ 2,700,000
Company Recognized Expense for One Plan							38,000
Accrued for obligations under the plan			34,319,000		29,766,000		26,037,000	25,161,000
Defined Benefit Plan Unfunded Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued for obligations under the plan			$ 20,700,000		$ 19,100,000
SERP Plan One [Member]
Defined Benefit Plan Disclosure [Line Items]
Time Period for Interests Vest			20 years
SERP Plan Two [Member]
Defined Benefit Plan Disclosure [Line Items]
Time Period for Interests Vest			15 years