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Commitments and Contingent Liabilities - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 Lot | Dec. 31, 2011 Lot | Dec. 31, 2010
Commitments And Contingencies [Line Items] |  |  |
Rent expense under operating leases | $ 33,399 | $ 33,607 | $ 33,172
Maximum range of deposits required under the purchase agreements | 10.00% |  |
Term of business plan | 5 years |  |
Contingent forfeitable deposits with land developers | 48,982 |  |
Finished lots committed to purchase under specific performance obligations | 71 | 92 |
Purchase price of finished lots committed to purchase under specific performance obligations | 7,000 |  |
Contingent obligations under bonds or letters of credit arrangements | 47,100 |  |
Contingent obligations under letters of credit arrangements | $ 9,634 |  |

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- Definition Amounts represent required payments of forfeitable deposits with land developers under existing, fixed price purchase agreements, assuming that contractual development milestones are met by the developers. + References No definition available. + Details
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- Definition Contingent obligations under bond or letter of credit arrangements with local municipalities, government agencies, or land developers + References No definition available. + Details
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- Definition Contingent obligations under letter of credit arrangements with local municipalities, government agencies, or land developers. + References No definition available. + Details
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- Definition Finished lots committed to purchase. + References No definition available. + Details
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- Definition Maximum percentage of deposits required under the purchase agreements. + References No definition available. + Details
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- Definition Purchase price of finished lots committed to purchase. + References No definition available. + Details
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- Definition Term of business plan. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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