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Inventory - Narrative (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2014 home Community | Dec. 31, 2013 Community | Sep. 30, 2014 home
Real Estate Properties [Line Items] |  |  |
Number of substantially completed homes | 169 bzh_NumberOfRealEstatePropertiesCompletedHomes |  | 205 bzh_NumberOfRealEstatePropertiesCompletedHomes
Total value of substantially completed homes | $ 42,300,000 bzh_ValueOfRealEstatePropertiesCompletedUnsoldHomes |  | $ 48,000,000 bzh_ValueOfRealEstatePropertiesCompletedUnsoldHomes
Inventory Impairment and Option Contract Abandonment | 0 us-gaap_AssetImpairmentCharges | 0 us-gaap_AssetImpairmentCharges |
Lot option abandonments | $ 0 bzh_ImpairmentChargesLotOptionAbandonment | $ 31,000 bzh_ImpairmentChargesLotOptionAbandonment |
Number of Homes Remaining to be Sold, Community Watchlist Minimum | 10 bzh_NumberofHomesRemainingtobeSoldCommunityWatchlistMinimum |  |
Threshold number of homes below a minimum threshold of profitability | 10 bzh_ThresholdNumberofHomesBelowaMinimumThresholdofProfitability |  |
Number of impaired communities | 2 bzh_DiscountedCashFlowAnalysesNumberOfImpairedCommunities | 1 bzh_DiscountedCashFlowAnalysesNumberOfImpairedCommunities |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Details
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