Debt Instrument, Face Amount, Modification

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Interest Rate, Effective Period

+ References

No definition available.

+ Details

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

- Definition

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

+ References

+ Details

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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
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-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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-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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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

- 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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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

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

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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

- References

No definition available.

+ Details

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Period Type:	duration

- References

No definition available.

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Period Type:	duration

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Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Period Type:

- Details

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Period Type:

- Details

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

- Details

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Period Type:

- Details

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Period Type:

- Details

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Borrowings - Narrative (Details)			3 Months Ended
Borrowings - Narrative (Details)	Sep. 09, 2019 USD ($)	Jul. 30, 2016	Mar. 31, 2020 USD ($)	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			$ 0
Senior Notes [Abstract]
Ownership interest In guarantor subsidiaries			100.00%
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			$ 33,669,000	$ 34,703,000
Revolving Credit Facility
Line of Credit Facility [Abstract]
Credit facility borrowing capacity					$ 250,000,000.0
Number of lenders \| lender				4
Proceeds from secured lines of credit			250,000,000
Borrowings outstanding			250,000,000	$ 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			16,700,000	$ 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			$ 39,400,000
Standby Letters of Credit \| Backstop Standby Letters of Credit
Line of Credit Facility [Abstract]
Credit facility borrowing capacity						$ 40,000,000
Junior Subordinated Notes
Junior Subordinated Notes [Abstract]
Weighted average fixed interest rate of debt (percent)			4.25%
Senior Notes \| Senior Unsecured Term Loans September 2022
Unsecured Debt [Abstract]
Aggregate principal amount of debt	$ 150,000,000.0
Periodic payment	$ 50,000,000
Stated interest rate on debt instrument (percent)	4.875%