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Fair Value Measurements Cash Flow Model Critical Assumptions (Details) | Dec. 31, 2012
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2013 [Member] |
Weighted Average Increase of Assumed Costs | 0.00%
Weighted Average Sales Price Increase | 0.00%
2014 And Beyond [Member] |
Weighted Average Increase of Assumed Costs | 2.00%
Weighted Average Sales Price Increase | 2.00%

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- Definition Weighted Average Increase of Assumed Costs + References No definition available. + Details
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Namespace Prefix: | mho_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Weighted Average Sales Price Increase + References No definition available. + Details
Name: | mho_WeightedAverageSalesPriceIncrease
Namespace Prefix: | mho_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant