[Line Items] for Fair Value of Financial Instrument Assumptions [Table]

No definition available.

Name:	mho_FairValueofFinancialInstrumentAssumptionsLineItems
Namespace Prefix:	mho_
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

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Date the credit facility first became available, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ 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=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtPercentageBearingVariableInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=mho_RepurchaseAgreementFourthAmendmentToSecondAmendmentAndRestatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=mho_WarehousingAgreementFifthAmendmentToSecondAmendedAndRestatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value Measurements Fair Value of Financial Instrument Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Nov. 15, 2021	Sep. 25, 2021
Revolving Credit Facility [Member]
Fair Value of Financial Instrument Assumptions [Line Items]
Basis Point Spread on Variable Rate	1.75%
Line of Credit Facility, Current Borrowing Capacity	$ 550.0
Line of Credit Facility, Maximum Borrowing Capacity	$ 700.0
Line of Credit Facility, Initiation Date	Jul. 18, 2013
Repurchase Agreement-Fourth Amendment to Second Amendment and Restated [Member]
Fair Value of Financial Instrument Assumptions [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 90.0
Line of Credit Facility, Initiation Date	Oct. 30, 2017
Warehousing Agreement - Fifth Amendment to Second Amended and Restated [Member]
Fair Value of Financial Instrument Assumptions [Line Items]
Basis Point Spread on Variable Rate	1.90%
Line of Credit Facility, Maximum Borrowing Capacity	$ 175.0	$ 235.0	$ 210.0
Line of Credit Facility, Initiation Date	Jun. 24, 2016