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Inventory and Capitalized Interest Inventory Parentheticals (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Parantheticals - Inventory [Abstract] |  |
Model Home Accumulated Depreciation | $ 13,568 | $ 13,441

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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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- Definition Parantheticals - Inventory [Abstract] + References No definition available. + Details
Name: | mho_ParantheticalsInventoryAbstract
Namespace Prefix: | mho_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration