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Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014
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Commitments and Contingencies [Abstract] |
Letters of Credit and Completion Bonds | $ 121,928 mho_LettersOfCreditAndBonds
Outstanding Performance and Maintenance Bonds | 74,000 mho_OutstandingPerformanceBonds
Performance letters of credit outstanding | 21,447 mho_PerformanceLettersOfCreditOutstanding
Financial Letters of Credit | 12,179 mho_FinancialLettersOfCredit
Financial Letters of Credit representing deposits on land and lot purchase agreements | 6,079 mho_OutstandingLettersOfCreditInLieuOfCashDepositsUnderCertainLandOptionContracts
Financial Bonds | 14,301 mho_FinancialBonds
Unrecorded Conditional Purchase Obligation | $ 452,698 mho_UnrecordedConditionalPurchaseObligation

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- Details
Name: | mho_CommitmentsAndContingenciesAbstract
Namespace Prefix: | mho_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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
Balance Type: | debit
Period Type: | instant

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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
Period Type: | instant

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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 The remaining purchase price of land under option contracts, which represents the unrecorded conditional purchase obligation as of the balance sheet date. + References No definition available. + Details
Name: | mho_UnrecordedConditionalPurchaseObligation
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant