| **Pension and Other Postretirement Plans (Amounts Recognized in Balance Sheet and AOCI) (Details) - USD ($) $ in Thousands** | Nov. 28, 2015 | Nov. 29, 2014 | Jan. 01, 2007 |
|------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|---------------|
| **Amounts recognized in the Consolidated Balance Sheets as of November 30**                                                  |          |          |          |
| Long-term pension and postretirement healthcare benefits liabilities                                                         | $ (31,577)    | $ (33,266)    |          |
| Pension Plan [Member]                                                                                                        |          |          |          |
| **Amounts recognized in the Consolidated Balance Sheets as of November 30**                                                  |          |          |          |
| Accounts payable and accrued liabilities                                                                                     | (159)         | (221)         |          |
| Long-term pension and postretirement healthcare benefits liabilities                                                         | (30,869)      | (32,481)      |          |
| Funded status                                                                                                                | (31,028)      | (32,702)      |          |
| Accumulated other comprehensive loss, pre-tax                                                                                | 58,137        | 61,096        |          |
| **Amounts recognized in Accumulated Other Comprehensive Loss, as of November 30**                                            |          |          |          |
| Unrecognized net actuarial loss (gain)                                                                                       | 58,136        | 61,098        |          |
| Unrecognized net prior service credit                                                                                        | 1             | (2)           |          |
| Accumulated other comprehensive loss, pre-tax                                                                                | 58,137        | 61,096        |          |
| Deferred taxes                                                                                                               | (21,380)      | (22,535)      |          |
| Accumulated other comprehensive loss, after-tax                                                                              | 36,757        | 38,561        |          |
| Other Postretirement Benefit Plans, Defined Benefit [Member]                                                                 |          |          |          |
| **Amounts recognized in the Consolidated Balance Sheets as of November 30**                                                  |          |          |          |
| Accounts payable and accrued liabilities                                                                                     | (47)          | (59)          |          |
| Long-term pension and postretirement healthcare benefits liabilities                                                         | (294)         | (338)         |          |
| Funded status                                                                                                                | (341)         | (397)         |          |
| Accumulated other comprehensive loss, pre-tax                                                                                | (1,214)       | (1,346)       |          |
| **Amounts recognized in Accumulated Other Comprehensive Loss, as of November 30**                                            |          |          |          |
| Unrecognized net actuarial loss (gain)                                                                                       | (864)         | (873)         |          |
| Unrecognized net prior service credit                                                                                        | (350)         | (473)         | $ 1,708       |
| Accumulated other comprehensive loss, pre-tax                                                                                | (1,214)       | (1,346)       |          |
| Deferred taxes                                                                                                               | 423           | 475           |          |
| Accumulated other comprehensive loss, after-tax                                                                              | $ (791)       | $ (871)       |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total tax amount of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, associated with amounts included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.
+ References
No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.
+ References
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| - References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.
+ References
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