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Commitments and Contingencies Commitments and Contingencies (Details) $ in Thousands | Sep. 30, 2023 USD ($)
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Commitments and Contingencies [Abstract] |
Letters of credit and completion bonds | $ 417,600
Performance bonds outstanding | 332,100
Performance letters of credit outstanding | 67,500
Financial letters of credit | 9,900
Financial letters of credit representing deposits on land and lot purchase agreements | 9,500
Financial Bonds | 4,800
Corporate Notes | 3,300
Unrecorded conditional purchase obligation | $ 1,040,000

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- Definition Commitments and Contingencies [Abstract] + References No definition available. + Details
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Namespace Prefix: | mho_
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- Definition Corporate Notes + References No definition available. + Details
Name: | mho_CorporateNotes
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Financial Bonds + References No definition available. + Details
Name: | mho_FinancialBonds
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Financial Letters of Credit + References No definition available. + Details
Name: | mho_FinancialLettersOfCredit
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of letters of credit and bonds outstanding as of the reporting date. + References No definition available. + Details
Name: | mho_LettersOfCreditAndBonds
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Outstanding letters of credit in lieu of cash deposits under certain land option contracts. + References No definition available. + Details
Name: | mho_OutstandingLettersOfCreditInLieuOfCashDepositsUnderCertainLandOptionContracts
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
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- Definition Outstanding performance and surety bonds related to site improvements + References No definition available. + Details
Name: | mho_OutstandingPerformanceBonds
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Performance letters of credit outstanding + References No definition available. + Details
Name: | mho_PerformanceLettersOfCreditOutstanding
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Carrying amount of an option or options to acquire real property. + References No definition available. + Details
Name: | us-gaap_PurchaseOptionsLand
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant