Average Term of SOFR considered for determination of enhanced special dividends on preferred stock.

No definition available.

Name:	bhm_PreferredStockAverageTermOfSofrConsideredForDeterminationOfEnhancedSpecialDividend
Namespace Prefix:	bhm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Denominator considered for determination of special daily dividends on preferred stock.

+ References

No definition available.

+ Details

Name:	bhm_PreferredStockDenominatorConsideredForDeterminationOfSpecialDailyDividends
Namespace Prefix:	bhm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Numerator percentage considered for determination of special daily dividends on preferred stock.

+ References

No definition available.

+ Details

Name:	bhm_PreferredStockNumeratorPercentageConsideredForDeterminationOfSpecialDailyDividends
Namespace Prefix:	bhm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the dividend to be paid was declared, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column A)(Footnote 4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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

- Details

Name:	us-gaap_AwardTypeAxis=bhm_LongtermIncentivePlanUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=bhm_BhmIncentivePlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_S2026M1DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_O2026M1DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_O2026M2DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_O2026M3DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_S2026M2DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=bhm_S2026M3DividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Declaration of Dividends (Details) - $ / shares						1 Months Ended		12 Months Ended
	Jan. 15, 2026	Jan. 01, 2026	Dec. 11, 2025	Jan. 01, 2025	Oct. 14, 2024	Apr. 30, 2025	May 31, 2024	Dec. 31, 2025
Subsequent Events
Average of the Term SOFR					1 month
Annual rate								6.00%
LTIP Units \| BHM Incentive Plans
Subsequent Events
Number of Units granted		7,824		5,405		74,031
Subsequent events
Subsequent Events
Average of the Term SOFR	1 month
Series A preferred stock numerator percentage considered for determination of special daily dividends	2.00%
Series A preferred stock denominator considered for determination of special daily dividends	12
S 2026 M1 Dividends \| Subsequent events
Subsequent Events
Preferred stock dividends per share declared	$ 0.125
Series A Preferred Stock
Subsequent Events
Annual rate								6.00%
Series A Preferred Stock \| Subsequent events
Subsequent Events
Annual rate	6.00%
Series A Preferred Stock \| Minimum
Subsequent Events
Annual rate					6.50%		6.50%
Series A Preferred Stock \| Minimum \| Subsequent events
Subsequent Events
Annual rate	6.50%
Series A Preferred Stock \| Maximum
Subsequent Events
Annual rate					8.50%		8.50%
Series A Preferred Stock \| Maximum \| Subsequent events
Subsequent Events
Annual rate	8.50%
Series A Preferred Stock \| O 2026 M1 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Jan. 23, 2026
Preferred stock dividends per share declared	$ 0.125
Paid / Payable Date	Feb. 05, 2026
Series A Preferred Stock \| O 2026 M2 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Feb. 25, 2026
Preferred stock dividends per share declared	$ 0.125
Paid / Payable Date	Mar. 05, 2026
Series A Preferred Stock \| O 2026 M3 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Mar. 25, 2026
Preferred stock dividends per share declared	$ 0.125
Paid / Payable Date	Apr. 02, 2026
Series A Preferred Stock \| S 2026 M1 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Jan. 23, 2026
Paid / Payable Date	Feb. 05, 2026
Series A Preferred Stock \| S 2026 M2 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Feb. 25, 2026
Paid / Payable Date	Mar. 05, 2026
Series A Preferred Stock \| S 2026 M3 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Mar. 25, 2026
Paid / Payable Date	Apr. 02, 2026
Series B Preferred Stock
Subsequent Events
Annual rate			7.50%					7.50%
Series B Preferred Stock \| O 2026 M1 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Jan. 23, 2026
Preferred stock dividends per share declared	$ 0.15625
Paid / Payable Date	Feb. 05, 2026
Series B Preferred Stock \| O 2026 M2 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Feb. 25, 2026
Preferred stock dividends per share declared	$ 0.15625
Paid / Payable Date	Mar. 05, 2026
Series B Preferred Stock \| O 2026 M3 Dividends \| Subsequent events
Subsequent Events
Declaration Date	Jan. 15, 2026
Record Date	Mar. 25, 2026
Preferred stock dividends per share declared	$ 0.15625
Paid / Payable Date	Apr. 02, 2026