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Retirement, Pension and Other Postretirement Plans - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2016 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Expenses on retirement plan |  |  | $ 17,194 | $ 15,747 | $ 14,423
Defined contribution plan vesting period |  |  | 3 years |  |
Settlement loss |  | $ (1,572) |  |  |
Expected reductions in service costs associated with change in estimate | $ 1,000 |  |  |  |
Expected reductions in interest costs associated with change in estimate | $ 3,200 |  |  |  |
Retiree eligible age |  |  | 65 years |  |
Change in postretirement benefit estimates on service cost |  |  | $ 100 |  |
Change in postretirement benefit estimates on interest cost |  |  | $ 500 |  |
Equity Securities [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Percentage of target rate in return seeking assets |  |  | 40.00% |  |
Debt Securities [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Percentage of target rate in return seeking assets |  |  | 60.00% |  |
Minimum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine postretirement benefit service and interest costs |  |  | 3.20% |  |
Maximum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine postretirement benefit service and interest costs |  |  | 3.30% |  |
Due to Lump Sum Retirement Payments [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Settlement loss |  |  | $ (160) | (593) |
Due to Plan Amendment [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Curtailment gain |  |  | $ 1,526 |  |
Due to Plan Termination [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Settlement loss |  |  |  | (1,242) |
Pension Cost [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Method used to amortize net gains and losses, description |  |  | Net actuarial gains or losses are amortized to expense on a plan-by-plan basis when they exceed the accounting corridor, which is set at 10% of the greater of the plan assets or benefit obligations. |  |
Accounting corridor, set percentage of greater of plan assets or benefit obligations |  |  | 10.00% |  |
Employer contribution in next fiscal year |  |  | $ 18,000 |  |
Pension Plan, United States [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Settlement loss |  |  |  | (516) | $ (632)
Curtailment gain |  |  |  | (68) |
Percentage of World wide pension assets |  |  | 90.00% |  |
Investments in common shares | 0 |  | 0 |  |
Pension Plan, United States [Member] | Minimum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine net periodic benefit service and interest costs | 2.40% |  |  |  |
Pension Plan, United States [Member] | Maximum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine net periodic benefit service and interest costs | 3.30% |  |  |  |
Pension Plan, International [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Settlement loss |  |  | $ (160) | $ (1,319) |
Curtailment gain |  |  | $ 1,526 |  |
Percentage of World wide pension assets |  |  | 10.00% |  |
Pension Plan, International [Member] | Minimum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine net periodic benefit service and interest costs | 0.90% |  |  |  |
Pension Plan, International [Member] | Maximum [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Spot rates used to determine net periodic benefit service and interest costs | 2.60% |  |  |  |
Postretirement Benefit Costs [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Method used to amortize net gains and losses, description |  |  | Net actuarial gains or losses are amortized to expense on a plan-by-plan basis when they exceed the accounting corridor, which is set at 10% of the greater of the plan assets or benefit obligations. |  |
Accounting corridor, set percentage of greater of plan assets or benefit obligations |  |  | 10.00% |  |
Employer contribution in next fiscal year |  |  | $ 2,100 |  |

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- Definition Description of the alternative method used to amortize net gains and losses. Any systematic method of amortizing gains or losses may be used in lieu of the minimum specified provided that (a) the minimum is used in any period in which the minimum amortization is greater (reduces the net balance included in accumulated other comprehensive income by more), (b) the method is applied consistently, (c) the method is applied similarly to both gains and losses, and (4) the method used is disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e11800-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 35 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=64937487&loc=d3e34641-114959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (o) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Curtailment -URI http://asc.fasb.org/extlink&oid=6520938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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