Debt Instrument, Face Amount, Modification

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Interest Rate, Effective Period

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Line of Credit Facility, Number of Lenders

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Ownership Interest In Guarantor Subsidiaries

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
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-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

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Balance Type:	na
Period Type:	duration

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Name:	bzh_LongtermandShorttermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=bzh_LetterofCreditCashSecuredMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
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Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bzh_StandbyLetterforCreditFacilityMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bzh_BackstopStandbyLettersofCreditMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Borrowings - Narrative (Details)	Sep. 09, 2019 USD ($)	Jul. 30, 2016	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($) lender	Sep. 01, 2019 USD ($)	May 31, 2018 USD ($)	Jan. 31, 2010 USD ($)
Line of Credit Facility [Abstract]
Amount of available borrowings under the secured revolving credit facility			$ 220,000,000
Senior Notes [Abstract]
Ownership interest In guarantor subsidiaries			100.00%
Secured Debt [Abstract]
Total debt, net			$ 1,208,062,000	$ 1,178,309,000
Senior Notes
Secured Debt [Abstract]
Total debt, net			1,111,475,000	1,111,085,000
Junior Subordinated Notes
Unsecured Debt [Abstract]
Stated interest rate on debt instrument (percent)		7.987%
Junior Subordinated Notes [Abstract]
Effective period of debt instrument interest rate		10 years
Face amount modification							$ 75,000,000
Unamortized accretion			34,186,000	34,703,000
Secured Debt [Abstract]
Total debt, net			66,587,000	66,070,000
Other secured notes payable
Secured Debt [Abstract]
Total debt, net			0	$ 1,154,000
Revolving Credit Facility
Line of Credit Facility [Abstract]
Credit facility borrowing capacity					$ 250,000,000
Number of lenders \| lender				4
Borrowings outstanding			30,000,000	$ 0
Letters of credit secured using cash collateral			0	0
Letter of Credit, Cash Secured
Line of Credit Facility [Abstract]
Letters of credit secured using cash collateral			16,600,000	$ 14,100,000
Standby Letters of Credit \| Standby Letters for Credit Facility
Line of Credit Facility [Abstract]
Credit facility borrowing capacity						$ 50,000,000.0
Letters of credit secured using cash collateral			$ 33,800,000
Standby Letters of Credit \| Backstop Standby Letters of Credit
Line of Credit Facility [Abstract]
Credit facility borrowing capacity						$ 40,000,000.0
Junior Subordinated Notes
Junior Subordinated Notes [Abstract]
Weighted average fixed interest rate of debt (percent)			4.39%
Senior Notes \| Senior Unsecured Term Loans September 2022
Unsecured Debt [Abstract]
Aggregate principal amount of debt	$ 150,000,000
Periodic payment	$ 50,000,000
Stated interest rate on debt instrument (percent)	4.875%