Name:	mho_BestEffortsContractsforCommittedInterestRateLockCommitmentsandMortgageLoansHeldforSaleFairValueDisclosuresAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Convertible senior subordinated notes due 2018 - Fair Value Disclosure

No definition available.

Name:	mho_Convertibleseniorsubordinatednotesdue2018FairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Forward sales of mortgage-backed securities

No definition available.

Name:	mho_ForwardContractsFairValueDisclosureAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Interest Rate Lock Commitments - Fair Value Disclosures (Assets)

No definition available.

Name:	mho_InterestRateLockCommitmentsFairValueDisclosuresAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Mortgage Loans Held For Sale

No definition available.

Name:	mho_MortgageLoansHeldForSale
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Notes Payable - Financial Services Fair Value Disclosure

No definition available.

Name:	mho_NotesPayableFinancialServicesFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Notes Payable - Homebuilding

No definition available.

Name:	mho_NotesPayableHomebuildingFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Off-Balance Sheet Letters of Credit

No definition available.

Name:	mho_OffBalanceSheetLettersofCredit
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Including the current and noncurrent portions, this element represents the loans payable which were initially due after one year or beyond the operating cycle, if longer, and which are not otherwise defined in the taxonomy.

No definition available.

Name:	mho_OtherLoansPayableFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Senior Notes - Fair Value Disclosures

No definition available.

Name:	mho_SeniorNotesFairValueDisclosures
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Senior Notes due 2025 Fair Value Disclosure

No definition available.

Name:	mho_SeniorNotesdue2025FairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Split dollar life insurance policies - amount as of the balance sheet date which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

No definition available.

Name:	mho_SplitDollarLifeInsurancePolicies
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Total Cash, Cash Equivalents and Restricted Cash

No definition available.

Name:	mho_TotalCashCashEquivalentsAndRestrictedCash
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

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

- References

No definition available.