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Pension and Other Postretirement Plans (Tables)
 12 Months Ended
Dec. 01, 2012
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Funded Status [Table Text Block]
The following tables show reconciliations of the changes in benefit obligations and plan assets for our pension plans and other postretirement benefits plan as of November 30, 2012 and 2011.  The accrued pension benefit obligation includes an unfunded benefit obligation of $23,337 and $22,022 as of November 30, 2012 and 2011, respectively, related to the Company’s U.S. combined nonqualified plans.

 
Pension Benefits
 
Other Postretirement Benefits
 
2012
 
2011
 
2012
 
2011
Change in benefit obligation
 
 
 
 
 
 
 
Benefit obligation at beginning of year
$
186,841

 
$
168,644

 
$
550

 
$
663

Currency translation
200

 
(14
)
 
—

 
—

Service cost
2,126

 
1,968

 
—

 
—

Interest cost
7,715

 
8,133

 
17

 
23

Plan participants' contributions
42

 
41

 
—

 
—

Actuarial losses (gains)
28,119

 
16,562

 
(189
)
 
(24
)
Benefits paid
(7,056
)
 
(8,493
)
 
(282
)
 
(483
)
Retiree contributions
—

 
—

 
346

 
371

Benefit obligation at end of year
$
217,987

 
$
186,841

 
$
442

 
$
550

 
 
 
 
 
 
 
 

 
Pension Benefits
 
Other Postretirement Benefits
 
2012
 
2011
 
2012
 
2011
Change in plan assets
 

 
 

 
 

 
 

Fair value of plan assets at beginning of year
$
112,548

 
$
100,866

 
$
—

 
$
—

Currency translation
175

 
(13
)
 
—

 
—

Actual return on plan assets
18,325

 
5,771

 
—

 
—

Employer contributions
22,273

 
14,376

 
282

 
483

Plan participants' contributions
42

 
41

 
—

 
—

Benefits paid
(7,056
)
 
(8,493
)
 
(282
)
 
(483
)
Fair value of plan assets at end of year
$
146,307

 
$
112,548

 
$
—

 
$
—

Funded status
$
(71,680
)
 
$
(74,293
)
 
$
(442
)
 
$
(550
)
 
 
 
 
 
 
 
 
Accumulated benefit obligation at end of year
$
209,572

 
$
178,959

 
n/a
 
n/a
 
 
 
 
 
 
 
 
Assumptions:
 

 
 

 
 

 
 

Discount rate - qualified plans
3.50%
 
4.50%
 
2.25%
 
3.50%
Discount rate - nonqualified plans
1.75%
 
2.75%
 
n/a
 
n/a
Rate of compensation increase - qualified plans
4.00%
 
4.00%
 
n/a
 
n/a
Rate of compensation increase - nonqualified plans
4.00%
 
4.00%
 
n/a
 
n/a
Measurement date
11/30/2012
 
11/30/2011
 
11/30/2012
 
11/30/2011
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
 
Pension Benefits
 
Other Postretirement Benefits
 
2012
 
2011
 
2012
 
2011
Amounts recognized in the Consolidated Balance Sheets as of November 30
 
 
 
 
 
 
 
Accounts payable and accrued liabilities
$
(21,372
)
 
$
(219
)
 
$
(70
)
 
$
(100
)
Long-term pension and postretirement healthcare benefits liabilities
(50,308
)
 
(74,074
)
 
(372
)
 
(450
)
Funded status
$
(71,680
)
 
$
(74,293
)
 
$
(442
)
 
$
(550
)
 
 
 
 
 
 
 
 
Accumulated other comprehensive loss, pre-tax
$
83,392

 
$
72,687

 
$
(1,832
)
 
$
(1,887
)
 
 
 
 
 
 
 
 
Amounts recognized in Accumulated Other Comprehensive Loss, as of November 30
 

 
 

 
 

 
 

Unrecognized net actuarial loss (gain)
$
83,413

 
$
72,717

 
$
(1,114
)
 
$
(1,047
)
Unrecognized net prior service credit
(21
)
 
(30
)
 
(718
)
 
(840
)
Accumulated other comprehensive loss, pre-tax
83,392

 
72,687

 
(1,832
)
 
(1,887
)
Deferred taxes
(31,336
)
 
(26,830
)
 
666

 
686

Accumulated other comprehensive loss, after-tax
$
52,056

 
$
45,857

 
$
(1,166
)
 
$
(1,201
)

 
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
The amounts affecting Accumulated other comprehensive loss for the years ended November 30, 2012 and 2011 are as follows:

 
Pension Benefits
 
Other Postretirement Benefits
 
2012
 
2011
 
2012
 
2011
Amortization of unrecognized prior service (cost) credit, net of tax of $(6), $(149) and $(45), $(45), respectively
$
3

 
$
246

 
$
77

 
$
77

Amortization of unrecognized actuarial (losses) gains, net of tax of $3,164, $2,403 and $(44), $(47), respectively
(5,159
)
 
(4,075
)
 
77

 
83

Current year actuarial losses (gains), net of tax of $(7,143), $(6,825) and $68, $9, respectively
11,876

 
11,639

 
(120
)
 
(15
)
Effect of change in deferred tax rate
(521
)
 
(335
)
 
1

 
(6
)
Total
$
6,199

 
$
7,475

 
$
35

 
$
139

 
Schedule of Allocation of Plan Assets [Table Text Block]
As of the November 30th measurement dates, the fair values of actual pension asset allocations were as follows:

 
2012
 
2011
Equity securities
60.6
%
 
72.1
%
Debt securities
38.9
%
 
24.1
%
Real estate
—
%
 
3.4
%
Cash and cash equivalents
0.5
%
 
0.4
%
 
100.0
%
 
100.0
%
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
 The following table summarizes the fair value of the pension plans’ assets.

 
Fair Value Measurements at Reporting Date
 
Total
 
Level 1
 
Level 2
 
Level 3
November 30, 2012
 
 
 
 
 
 
 
U.S. equity securities funds
$
61,272

 
$
61,272

 
$
—

 
$
—

Non-U.S. equity securities funds
27,422

 
27,422

 
—

 
—

Fixed income securities funds
56,854

 
56,854

 
—

 
—

Cash and equivalents funds
618

 
618

 
—

 
—

Total
146,166

 
$
146,166

 
$
—

 
$
—

Other items to reconcile to fair value of plan assets
141

 
 

 
 

 
 

Fair value of plan assets
$
146,307

 
 

 
 

 
 


 
Fair Value Measurements at Reporting Date
 
Total
 
Level 1
 
Level 2
 
Level 3
November 30, 2011
 
 
 
 
 
 
 
U.S. equity securities funds
$
68,481

 
$
—

 
$
68,481

 
$
—

Non-U.S. equity securities funds
12,613

 
5,424

 
7,189

 
—

Fixed income securities funds
27,171

 
1,916

 
25,255

 
—

Real estate funds
3,782

 
—

 
—

 
3,782

Cash and equivalents funds
67

 
67

 
—

 
—

Total
112,114

 
$
7,407

 
$
100,925

 
$
3,782

Other items to reconcile to fair value of plan assets
434

 
 

 
 

 
 

Fair value of plan assets
$
112,548

 
 

 
 

 
 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The following table summarizes changes in the fair value of Level 3 assets for the year ended November 30, 2012.
 
 
2012
 
2011
Balance at beginning of year
$
3,782

 
$
3,203

Unrealized gains
—

 
579

Realized gains
279

 
—

Sale of assets
(4,061
)
 
—

Balance at end of year
$
—

 
$
3,782

 
Schedule of Net Benefit Costs [Table Text Block]
The components of net periodic benefit income for postretirement healthcare benefits are shown below.

 
Other Postretirement Benefits
 
2012
 
2011
 
2010
Components of net periodic benefit income
 
 
 
 
 
Interest cost
$
17

 
$
23

 
$
32

Amortization of unrecognized:
 

 
 

 
 

Prior service cost
(122
)
 
(122
)
 
(123
)
Net actuarial gain
(121
)
 
(130
)
 
(129
)
Net periodic benefit income
$
(226
)
 
$
(229
)
 
$
(220
)
 
 
 
 
 
 
Assumptions:
 

 
 

 
 

Discount rate
3.50
%
 
3.75
%
 
4.25
%
Measurement date
11/30/2011
 
11/30/2010
 
11/30/2009
 
The components of net periodic benefit cost for pensions are shown below.  Net periodic benefit cost is based on assumptions determined at the prior year-end measurement date.  Increases in the liability due to changes in plan benefits are recognized in the net periodic benefit costs through straight-line amortization over the average remaining service period of employees expected to receive benefits.

 
Pension Benefits
 
2012
 
2011
 
2010
Components of net periodic benefit cost
 
 
 
 
 
Service cost
$
2,126

 
$
1,968

 
$
2,119

Interest cost
7,715

 
8,133

 
8,108

Expected return on plan assets
(9,181
)
 
(7,674
)
 
(7,123
)
Settlement costs
—

 
1,368

 
—

Amortization of unrecognized:
 

 
 

 
 

Prior service cost
(10
)
 
(395
)
 
(394
)
Net actuarial loss
8,323

 
5,110

 
5,006

Net periodic benefit cost
$
8,973

 
$
8,510

 
$
7,716

 
 
 
 
 
 
Assumptions:
 

 
 

 
 

Discount rate - qualified plans
4.50%
 
5.25%
 
5.50%
Discount rate - nonqualified plans
1.75%
 
2.75%
 
2.25%
Expected return on plan assets
7.50%
 
7.50%
 
7.75%
Rate of compensation increase - qualified plans
4.00%
 
4.00%
 
4.00%
Rate of compensation increase - nonqualified plans
4.00%
 
4.00%
 
4.00%
Measurement date - qualified plans
11/30/2011
 
11/30/2010
 
11/30/2009
Measurement date - nonqualified plans
11/30/2012
 
11/30/2011
 
11/30/2010
 
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]
The estimated amounts that will be amortized from Accumulated other comprehensive loss at November 30, 2012 into net periodic benefit cost, pre-tax, in fiscal year 2013 are as follows:

 
Pension
Benefits
 
Other
Postretirement
Benefits
Prior service cost (credit)
$
(10
)
 
$
(123
)
Actuarial loss (gain)
6,704

 
(149
)
Total
$
6,694

 
$
(272
)
 
Schedule of Expected Benefit Payments [Table Text Block]
The expected cash benefit payments from the plans for the next ten fiscal years are as follows:

 
Pension
Benefits
 
Other
Postretirement
Benefits
2013
$
28,821

 
$
70

2014
8,069

 
64

2015
8,424

 
59

2016
8,769

 
47

2017
9,225

 
39

2018-2022
54,131

 
129
Schedule of Costs of Retirement Plans [Table Text Block]
The Company also sponsors various defined contribution plans that provide employees with an opportunity to accumulate funds for their retirement.  The Company may match, at its discretion, the contributions of participating employees in the respective plans.  The Company recognized expense related to these plans for the past three fiscal years as follows:
 
2012
$
4,377

2011
3,933

2010
3,597