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Commitments and Contingencies (Changes in the Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Feb. 28, 2015 | Feb. 28, 2014 | Nov. 30, 2014 | Nov. 30, 2013
Loss Contingencies [Line Items] |  |  |  |  |  |
Self Insurance Reserve | $ 82,747 us-gaap_SelfInsuranceReserve |  | $ 90,416 us-gaap_SelfInsuranceReserve |  | $ 86,574 us-gaap_SelfInsuranceReserve | $ 92,214 us-gaap_SelfInsuranceReserve
Expenses Associated with Self Insurance | 2,435 kbh_ExpensesAssociatedWithSelfInsurance | [1] | 2,616 kbh_ExpensesAssociatedWithSelfInsurance | [1] |  |
Payments, Net of Recoveries for Self Insurance | (6,262)kbh_PaymentsNetofRecoveriesforSelfInsurance | [2] | (4,414)kbh_PaymentsNetofRecoveriesforSelfInsurance | [2] |  |
Changes in the Warranty Liability |  |  |  |  |  |
Balance at beginning of period | 45,196 us-gaap_StandardProductWarrantyAccrual |  | 48,704 us-gaap_StandardProductWarrantyAccrual |  |  |
Warranties issued | 4,133 us-gaap_StandardProductWarrantyAccrualWarrantiesIssued |  | 3,426 us-gaap_StandardProductWarrantyAccrualWarrantiesIssued |  |  |
Payments | (7,595)us-gaap_StandardProductWarrantyAccrualPayments |  | (8,711)us-gaap_StandardProductWarrantyAccrualPayments |  |  |
Adjustments | 3,623 us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease | [3] | 0 us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease | [3] |  |
Balance at end of period | 45,357 us-gaap_StandardProductWarrantyAccrual |  | 43,419 us-gaap_StandardProductWarrantyAccrual |  |  |
Water Intrusion [Member] |  |  |  |  |  |
Changes in the Warranty Liability |  |  |  |  |  |
Payments | $ (4,100)us-gaap_StandardProductWarrantyAccrualPayments / us-gaap_LossContingenciesByNatureOfContingencyAxis = kbh_WaterIntrusionMember |  | $ (6,000)us-gaap_StandardProductWarrantyAccrualPayments / us-gaap_LossContingenciesByNatureOfContingencyAxis = kbh_WaterIntrusionMember |  |  |
[1] | These expenses are included in selling, general and administrative expenses and are largely offset by contributions from subcontractors participating in the wrap-up policy.
[2] | Recoveries are reflected in the period we receive funds from subcontractors and/or their insurers.
[3] | As discussed below, adjustments for the three months ended February 28, 2015 were comprised of a reclassification of estimated minimum probable recoveries to receivables and had no impact on our consolidated statement of operations for the period.

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- Definition Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI http://asc.fasb.org/extlink&oid=6398077&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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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