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Inventory Inventory Parentheticals (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
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Parantheticals - Inventory [Abstract] |  |
Model Home Accumulated Depreciation | $ 4,390 | $ 4,340

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- Definition Accumulated depreciation related to our model homes in inventory. + References No definition available. + Details
Name: | mho_ModelHomeAccumulatedDepreciation
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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