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Commitments and Contingencies (Changes in Warranty Liability) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Changes in the Company's warranty liability |  |  |  |
Balance at beginning of year |  | $ 82,490 | $ 69,798 | $ 56,682
Warranties issued |  | 35,480 | 37,792 | 38,452
Payments |  | (23,531) | (23,300) | (25,336)
Adjustments |  | (5,600) | (1,800) | 0
Balance at end of year |  | 88,839 | 82,490 | 69,798
Self Insurance Reserve, Balance at beginning of year |  | 176,841 | 177,695 | 158,584
Expenses Associated with Self Insurance | [1] | 16,685 | 20,436 | 20,371
Payments, Net of Recoveries for Self Insurance | [2] | (15,761) | (21,290) | (22,933)
Self Insurance Reserve, Balance at end of year |  | 177,765 | 176,841 | 177,695
Self Insurance [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Increase (Decrease) in Insurance Liabilities | [3] | $ 0 | $ 0 | $ 21,673
[1] | These expenses are included in selling, general and administrative expenses and are largely offset by contributions from independent subcontractors participating in the wrap-up policy
[2] | Includes net changes in estimated probable insurance and other recoveries, which are recorded in receivables, to present our self-insurance liability on a gross basis.
[3] | The amount for 2017 reflected a change in estimate to increase our self-insurance liability based on an actuarially determined estimate that we believed had a higher probability of being adequate to cover future payments associated with unresolved claims, including claims incurred but not yet reported. This adjustment was included in selling, general and administrative expenses.

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- Definition The increase (decrease) in insurance liability balances during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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