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v2.4.1.9

Fair Value Measurements Assets and Liabilities Measured on a Non-Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Valuation adjustments to investments in unconsolidated joint ventures | $ 1,047 mho_ValuationAdjustmentsToInvestmentsInUnconsolidatedEntities | $ 0 mho_ValuationAdjustmentsToInvestmentsInUnconsolidatedEntities | $ 390 mho_ValuationAdjustmentsToInvestmentsInUnconsolidatedEntities
Fair Value, Significant Unobservable Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long Lived Real Estate Assets Fair Value Disclosure | 3,730 mho_LongLivedRealEstateAssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 5,494 mho_LongLivedRealEstateAssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 6,658 mho_LongLivedRealEstateAssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Total losses | 3,457 mho_RealEstateRelatedImpairments / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 5,805 mho_RealEstateRelatedImpairments / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 3,502 mho_RealEstateRelatedImpairments / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Long Lived Assets Initial Basis | 7,187 mho_LongLivedAssetsInitialBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 11,299 mho_LongLivedAssetsInitialBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 10,160 mho_LongLivedAssetsInitialBasis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Total Fair Value Measurements - Non-Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investments in unconsolidated joint ventures |  |  | $ 1,050 us-gaap_EquityMethodInvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = mho_TotalFairValueNonRecurringMember

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- Definition Long lived assets initial basis. + References No definition available. + Details
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Balance Type: | debit
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- Definition The fair value of long lived real estate assets that are held by the entity and are expected to provide future economic benefit, that were impaired during the reporting period. + References No definition available. + Details
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- Definition The charge against earnings resulting from the aggregate write down of land, terminated options/purchase contracts and related pre acquisition costs, and real estate from their carrying value to their fair value. + References No definition available. + Details
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- 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
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- Definition Fair value portion of investments accounted under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35740979&loc=d3e32014-111567 + Details
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