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Borrowings - Narrative (Details) (USD $) | 3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014 | Jul. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Apr. 30, 2014 | Feb. 28, 2013 | Jul. 17, 2012 TEUs | Jan. 15, 2010 | Nov. 10, 2014 lender
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Amount of available borrowings under the Secured Revolving Credit Facility | $ 123,400,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  | $ 123,400,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  |  |  |  |  |  |  |  |
Outstanding borrowings under the Secured Revolving Credit Facility | 26,600,000 us-gaap_LineOfCredit |  | 26,600,000 us-gaap_LineOfCredit |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Consolidated Tangible Net Worth | 238,100,000 bzh_ConsolidatedTangibleNetWorth |  | 238,100,000 bzh_ConsolidatedTangibleNetWorth |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt | (153,000)us-gaap_GainsLossesOnExtinguishmentOfDebt | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt | (153,000)us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Unamortized accretion | 4,019,000 us-gaap_DebtInstrumentUnamortizedDiscount |  | 4,019,000 us-gaap_DebtInstrumentUnamortizedDiscount |  |  |  | 4,399,000 us-gaap_DebtInstrumentUnamortizedDiscount |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 1,535,172,000 us-gaap_LongTermDebt |  | 1,535,172,000 us-gaap_LongTermDebt |  |  |  | 1,535,433,000 us-gaap_LongTermDebt |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Minimum consolidated tangible net worth | 85,000,000 bzh_ConversionofDebtTriggeringEventValueofConsolidatedTangibleNetWorth / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 85,000,000 bzh_ConversionofDebtTriggeringEventValueofConsolidatedTangibleNetWorth / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Percentage of debt, at par, required to be offered for purchase | 10.00%bzh_ConversionofDebtTriggeringEventPercentageofDebtInstrumentatParRequiredtobeOfferedforPurchase / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 10.00%bzh_ConversionofDebtTriggeringEventPercentageofDebtInstrumentatParRequiredtobeOfferedforPurchase / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Amount of original debt that could be repurchased | 27,500,000 bzh_DebtInstrumentOriginalAmountOfDebtThatCouldBeRepurchased / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 27,500,000 bzh_DebtInstrumentOriginalAmountOfDebtThatCouldBeRepurchased / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Unamortized accretion | 4,019,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 4,019,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 4,399,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 1,432,261,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 1,432,261,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 1,435,183,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Senior Notes | 5 3/4% Senior Notes Maturing June 2019 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt |  |  |  |  |  |  |  | 325,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |
Stated interest rate on debt instrument (percent) | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 0.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 35.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 5 3/4% Senior Notes Maturing June 2019 | Optional Redemption Under Indenture |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 105.75%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 105.75%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 65.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 5 3/4% Senior Notes Maturing June 2019 | In Compliance |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_InComplianceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_InComplianceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 0.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A534SeniorNotesMaturingJune2019Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_InComplianceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Senior Notes | 9 1/8% Senior Notes Maturing June 2018 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Call price and make-whole premiums provided for by 2018 Notes | 17,200,000 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_DebtInstrumentAxis = bzh_A918SeniorNotesMaturingJune2018Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | (19,800,000)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_DebtInstrumentAxis = bzh_A918SeniorNotesMaturingJune2018Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/2% Senior Notes Maturing September 2021 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt |  |  |  |  |  | 200,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Stated interest rate on debt instrument (percent) | 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  | 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  |  | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Debt Issuance Discount |  |  |  |  |  | 98.541%bzh_DebtIssuanceDiscount / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 35.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/2% Senior Notes Maturing September 2021 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/2% Senior Notes Maturing September 2021 | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 105.625%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 105.625%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/2% Senior Notes Maturing September 2021 | Optional Redemption Under Indenture |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 107.50%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 107.50%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Percentage | 65.00%bzh_DebtInstrumentRepurchasePercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 65.00%bzh_DebtInstrumentRepurchasePercentage / us-gaap_DebtInstrumentAxis = bzh_A712SeniorNotesMaturingSeptember2021Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt |  |  |  |  |  |  |  |  | 200,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |
Stated interest rate on debt instrument (percent) | 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  |  | 100.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 35.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 100.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 103.625%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  | 103.625%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | Optional Redemption Under Indenture |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 107.25%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 107.25%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 65.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_OptionalRedemptionUnderIndentureMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | In Compliance |  |  |  |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument redemption price (percent) | 101.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_InComplianceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 101.00%bzh_DebtInstrumentRedemptionOptionPercentOfPar / us-gaap_DebtInstrumentAxis = bzh_A714SeniorNotesMaturingFebruary2023Member / bzh_DebtInstrumentCovenantComplianceStatusAxis = bzh_InComplianceMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |  |  |  |  |
Senior Notes | 6.625% Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate on debt instrument (percent) | 6.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_SixAndFiveEighthsPercentSeniorSecuredNotesMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 6.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_SixAndFiveEighthsPercentSeniorSecuredNotesMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 6.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_SixAndFiveEighthsPercentSeniorSecuredNotesMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Senior Notes | 9 1/8% Senior Notes Maturing May 2019 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate on debt instrument (percent) | 9.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A918SeniorNotesMaturingMay2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 9.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A918SeniorNotesMaturingMay2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 9.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A918SeniorNotesMaturingMay2019Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Senior Notes | 8 1/8% Senior Notes Maturing June 2016 |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate on debt instrument (percent) | 8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A818SeniorNotesMaturingJune2016Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A818SeniorNotesMaturingJune2016Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  | 8.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_A818SeniorNotesMaturingJune2016Member / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Senior Notes | Tangible Equity Units |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate on debt instrument (percent) |  |  |  |  |  |  |  |  |  | 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bzh_TangibleEquityUnitsMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |
Tangible Equity Units TEUs Converted |  |  |  |  |  |  | 890,000 bzh_TangibleEquityUnitsTEUsConverted / us-gaap_DebtInstrumentAxis = bzh_TangibleEquityUnitsMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Stock Exchange, Debt Related to Tangible Equity Unit |  |  |  |  |  |  | 2,400,000 bzh_StockExchangeDebtRelatedToTangibleEquityUnit / us-gaap_DebtInstrumentAxis = bzh_TangibleEquityUnitsMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |  |  |  |
Tangible Capital [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Tangible Equity Units (TEUs) issued during period, (units) |  |  |  |  |  |  |  |  |  | 4,600,000 bzh_TangibleEquityUnitsTeusIssuedDuringPeriodUnits / us-gaap_DebtInstrumentAxis = bzh_TangibleEquityUnitsMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  |
Junior Subordinated Notes |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt | 103,100,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  | 103,100,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |  |  |  | 75,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |
Stated interest rate on debt instrument (percent) | 7.987%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  | 7.987%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |  |  |  |  |
Junior Subordinated Notes [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Effective period of debt instrument interest rate |  |  | 10 years |  |  |  |  |  |  |  |  |
Unamortized accretion | 44,000,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  | 44,000,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 56,770,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  | 56,770,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  | 55,737,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_JuniorSubordinatedDebtMember |  |  |  |  |
Cash Secured Loan |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Three-month LIBOR |  |  | LIBOR |  |  |  |  |  |  |  |  |
Long-term debt | 22,368,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  | 22,368,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  | 22,368,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember |  |  |  |  |
Other Secured Notes Payable |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 23,773,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 23,773,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  | 22,145,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  |  |
Weighted average fixed interest rate of debt (percent) | 4.69%us-gaap_DebtWeightedAverageInterestRate / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  | 4.69%us-gaap_DebtWeightedAverageInterestRate / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember |  |  |  |  |  |  |  |  |
Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Credit facility borrowing capacity | 150,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 150,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |
Inventory assets pledged as collateral | 1,000,000,000 us-gaap_PledgedAssetsNotSeparatelyReportedRealEstate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 1,000,000,000 us-gaap_PledgedAssetsNotSeparatelyReportedRealEstate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |  |  |  |  |
Outstanding borrowings under the Secured Revolving Credit Facility | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Number of Lenders |  |  |  |  |  |  |  |  |  |  |  | 4 bzh_LineofCreditFacilityNumberofLenders / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Line of Credit Facility, Expiration Period |  |  | 1 year |  |  |  |  |  |  |  |  |
Letter of Credit, Cash Secured [Member] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit secured using cash collateral | 16,000,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = bzh_LetterofCreditCashSecuredMember |  | 16,000,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = bzh_LetterofCreditCashSecuredMember |  |  |  | 39,100,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = bzh_LetterofCreditCashSecuredMember |  |  |  |  |
Revolving Credit Facility Future Amount [Member] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit, Current | 20,000,000 us-gaap_LinesOfCreditCurrent / us-gaap_CreditFacilityAxis = bzh_RevolvingCreditFacilityFutureAmountMember |  | 20,000,000 us-gaap_LinesOfCreditCurrent / us-gaap_CreditFacilityAxis = bzh_RevolvingCreditFacilityFutureAmountMember |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Noncurrent | $ 130,000,000 us-gaap_LongTermLineOfCredit / us-gaap_CreditFacilityAxis = bzh_RevolvingCreditFacilityFutureAmountMember |  | $ 130,000,000 us-gaap_LongTermLineOfCredit / us-gaap_CreditFacilityAxis = bzh_RevolvingCreditFacilityFutureAmountMember |  |  |  |  |  |  |  |  |
Number of Lenders No Credit Extension [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Number of Lenders |  |  |  |  |  |  |  |  |  |  |  | 1 bzh_LineofCreditFacilityNumberofLenders / us-gaap_CreditFacilityAxis = bzh_NumberofLendersNoCreditExtensionDomain
Number of Lenders Extending Credit Facility [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Number of Lenders |  |  |  |  |  |  |  |  |  |  |  | 3 bzh_LineofCreditFacilityNumberofLenders / us-gaap_CreditFacilityAxis = bzh_NumberofLendersExtendingCreditFacilityDomain
London Interbank Offered Rate (LIBOR) [Member] | Cash Secured Loan |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Spread on variable interest rate (percent) |  |  | 0.40%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_SecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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