Percent restrictions on payment of dividends per restricted payments basket

No definition available.

Name:	mho_Percentrestrictionsonpaymentofdividends
Namespace Prefix:	mho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Restrictions on payment of dividends - beginning amount for calculation

+ References

No definition available.

+ Details

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Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
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
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-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

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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Disclosure of the amount of equity that is restricted to use by regulation or agreement.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	us-gaap_DebtInstrumentAxis=mho_A2025SeniorNotesMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mho_A2021SeniorNotesMember
Namespace Prefix:
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Balance Type:
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- Details

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Data Type:	na
Balance Type:
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- Details

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- Details

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Namespace Prefix:
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- Details

Name:	mho_RestrictedPaymentsBasketCalculationAxis=mho_PercentageofnetcashproceedsfromsaleofqualifiedequityinterestsaddedtobaseandincomelossamountincalculationMember
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Debt Senior Notes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended				24 Months Ended		48 Months Ended
Debt Senior Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 31, 2026	Jan. 31, 2025	Jul. 31, 2023	Jul. 31, 2022	Feb. 01, 2028	Jul. 31, 2025	Jan. 31, 2024	Jul. 31, 2021	Dec. 31, 2019
Debt Instrument [Line Items]
Restricted Payments Basket	$ 276,300									$ 264,500
2028 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000
Debt Instrument, Interest Rate, Stated Percentage	4.95%
Debt Instrument, Maturity Date	Feb. 01, 2028
Debt Instrument, Redemption Price, Percentage		101.238%	102.475%			100.00%		103.713%
2025 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000
Debt Instrument, Interest Rate, Stated Percentage	5.625%
Debt Instrument, Maturity Date	Aug. 01, 2025
Debt Instrument, Redemption Price, Percentage				101.406%	102.813%		100.00%		104.219%
2021 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 300,000
Debt Instrument, Interest Rate, Stated Percentage	6.75%
Debt Instrument, Redemption Price, Percentage						100.00%
Base of restricted payments basket income calculation [Member]
Debt Instrument [Line Items]
Other Restrictions on Payment of Dividends	$ 125,000
Percentage of our aggregate consolidated net income added to base amount of calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends	50.00%
Percentage of our aggregate consolidated net income subtracted from base amount of calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends	100.00%
Percentage of net cash proceeds from sale of qualified equity interests added to base and income/loss amount in calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends	100.00%