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Valuation Adjustments and Write-offs Valuation Adjustments and Write-offs (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Impairment of investments in unconsolidated joint ventures | $ 0 | $ 390 | $ 1,029
Total impairments and write-offs of option deposits and pre-acquisition costs | 5,805 | 3,758 | 22,967
Impairment of operating communities: |  |  |
Impairment of operating communities: | 481 | 285 | 9,934
Impairment of future communities: |  |  |
Impairment of future communities: | 3,531 | 2,732 | 10,440
Impairment of land held for sale: |  |  |
Impairment of land held for sale: | 1,793 | 95 | 590
Option deposits and pre-acquisition costs write-offs: |  |  |
Option deposits and pre-acquisition costs write-offs: | 0 | 256 | 974
Impairment of investments in Unconsolidated Joint Ventures: |  |  |
Impairment of investments in unconsolidated joint ventures | 0 | 390 | 1,029
Midwest Homebuilding [Member] | Impairment of operating communities: |  |  |
Impairment of operating communities: | 481 | 285 | 5,493
Midwest Homebuilding [Member] | Impairment of future communities: |  |  |
Impairment of future communities: | 3,531 | 2,732 | 6,985
Midwest Homebuilding [Member] | Impairment of land held for sale: |  |  |
Impairment of land held for sale: | 1,793 | 95 | 0
Midwest Homebuilding [Member] | Option deposits and pre-acquisition costs write-offs: |  |  |
Option deposits and pre-acquisition costs write-offs: | 0 | 36 | 441
Midwest Homebuilding [Member] | Impairment of investments in Unconsolidated Joint Ventures: |  |  |
Impairment of investments in unconsolidated joint ventures | 0 | 390 | 979
Southern Homebuilding [Member] | Impairment of operating communities: |  |  |
Impairment of operating communities: | 0 | 0 | 2,608
Southern Homebuilding [Member] | Impairment of future communities: |  |  |
Impairment of future communities: | 0 | 0 | 3,455
Southern Homebuilding [Member] | Impairment of land held for sale: |  |  |
Impairment of land held for sale: | 0 | 0 | 590
Southern Homebuilding [Member] | Option deposits and pre-acquisition costs write-offs: |  |  |
Option deposits and pre-acquisition costs write-offs: | 0 | 110 | 89
Southern Homebuilding [Member] | Impairment of investments in Unconsolidated Joint Ventures: |  |  |
Impairment of investments in unconsolidated joint ventures | 0 | 0 | 50
Mid-Atlantic Homebuilding [Member] | Impairment of operating communities: |  |  |
Impairment of operating communities: | 0 | 0 | 1,833
Mid-Atlantic Homebuilding [Member] | Impairment of future communities: |  |  |
Impairment of future communities: | 0 | 0 | 0
Mid-Atlantic Homebuilding [Member] | Impairment of land held for sale: |  |  |
Impairment of land held for sale: | 0 | 0 | 0
Mid-Atlantic Homebuilding [Member] | Option deposits and pre-acquisition costs write-offs: |  |  |
Option deposits and pre-acquisition costs write-offs: | 0 | 110 | 444
Mid-Atlantic Homebuilding [Member] | Impairment of investments in Unconsolidated Joint Ventures: |  |  |
Impairment of investments in unconsolidated joint ventures | $ 0 | $ 0 | $ 0

X
- Definition Total valuation adjustments and write-offs recorded during the period. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Definition Valuation adjustments recorded in costs of homes sold in the period, related to future communities, in order to reduce the carrying amount to fair value. + References No definition available. + Details
Name: | mho_ValuationAdjustmentsToFutureCommunities
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Losses recorded relating the entity's investment in unconsolidated entities, if its investment in the unconsolidated entity, or a portion thereof, is deemed to be other than temporary impaired. + References No definition available. + Details
Name: | mho_ValuationAdjustmentsToInvestmentsInUnconsolidatedEntities
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Valuation adjustments to land the Company intends to sell or has sold recorded in costs of land sold in the period. + References No definition available. + Details
Name: | mho_ValuationAdjustmentsToLandWithIntendToSellOrHasSoldToThirdParties
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Definition Valuation adjustments recorded in costs of homes sold in the period, related to current operating communities, in order to reduce the carrying amount to fair value. + References No definition available. + Details
Name: | mho_ValuationAdjustmentsToOperatingCommunities
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

X
- Definition Write-offs of option deposits and pre-acquisition costs for which the entity intends to walk-away recorded during the period. + References No definition available. + Details
Name: | mho_WriteOffsOfOptionDepositsAndPreacquisitionCosts
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration