<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.6.0.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>259</ContextCount>
  <ElementCount>457</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>65</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - DEI Document</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/DeiDocument</Role>
      <ShortName>DEI Document</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/ConsolidatedStatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002001 - Statement - Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/ConsolidatedBalanceSheetsParentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - Consolidated Statement of Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/ConsolidatedStatementOfShareholdersEquity</Role>
      <ShortName>Consolidated Statement of Shareholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Stock Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensation</Role>
      <ShortName>Stock Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2122100 - Disclosure - Inventory</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/Inventory</Role>
      <ShortName>Inventory</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2128100 - Disclosure - Transactions with Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/TransactionsWithRelatedParties</Role>
      <ShortName>Transactions with Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2131100 - Disclosure - Investment in Unconsolidated Joint Ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InvestmentInUnconsolidatedJointVentures</Role>
      <ShortName>Investment in Unconsolidated Joint Ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2134100 - Disclosure - Guarantees and Indemnifications</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/GuaranteesAndIndemnifications</Role>
      <ShortName>Guarantees and Indemnifications</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2137100 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2146100 - Disclosure - Lease Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/LeaseCommitments</Role>
      <ShortName>Lease Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2147100 - Disclosure - Community Development District Infrastructure and Related Obligations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommunityDevelopmentDistrictInfrastructureAndRelatedObligations</Role>
      <ShortName>Community Development District Infrastructure and Related Obligations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2149100 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2150100 - Disclosure - Preferred Shares</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/PreferredShares</Role>
      <ShortName>Preferred Shares</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2151100 - Disclosure - Earnings per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/EarningsPerShare</Role>
      <ShortName>Earnings per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2152100 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2153100 - Disclosure - Business Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/BusinessSegments</Role>
      <ShortName>Business Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2154100 - Disclosure - Supplemental Guarantor Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementalGuarantorInformation</Role>
      <ShortName>Supplemental Guarantor Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2155100 - Disclosure - Supplementary Financial Data</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementaryFinancialData</Role>
      <ShortName>Supplementary Financial Data</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Stock Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/StockBasedCompensation</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2319301 - Disclosure - Fair Value Measurements Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2322301 - Disclosure - Inventory Inventory (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InventoryInventoryTables</Role>
      <ShortName>Inventory Inventory (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2331301 - Disclosure - Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InvestmentInUnconsolidatedJointVenturesInvestmentInUnconsolidatedJointVenturesTables</Role>
      <ShortName>Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2337301 - Disclosure - Commitments and Contingencies Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2347301 - Disclosure - Community Development District Infrastructure and Related Obligations Community Development District Infrastructure and Related Obligations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommunityDevelopmentDistrictInfrastructureAndRelatedObligationsCommunityDevelopmentDistrictInfrastructureAndRelatedObligationsTables</Role>
      <ShortName>Community Development District Infrastructure and Related Obligations Community Development District Infrastructure and Related Obligations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2349301 - Disclosure - Debt Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/DebtDebtTables</Role>
      <ShortName>Debt Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2351301 - Disclosure - Earnings per Share Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/EarningsPerShareEarningsPerShareTables</Role>
      <ShortName>Earnings per Share Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2352301 - Disclosure - Income Taxes Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesIncomeTaxesTables</Role>
      <ShortName>Income Taxes Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2353301 - Disclosure - Business Segments Business Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/BusinessSegmentsBusinessSegmentsTables</Role>
      <ShortName>Business Segments Business Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2354301 - Disclosure - Supplemental Guarantor Information Supplemental Guarantor Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementalGuarantorInformationSupplementalGuarantorInformationTables</Role>
      <ShortName>Supplemental Guarantor Information Supplemental Guarantor Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2355301 - Disclosure - Supplementary Financial Data Supplementary Financial Data (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementaryFinancialDataSupplementaryFinancialDataTables</Role>
      <ShortName>Supplementary Financial Data Supplementary Financial Data (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - Capitalized Interest Rollfoward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CapitalizedInterestRollfowardDetails</Role>
      <ShortName>Capitalized Interest Rollfoward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2401405 - Disclosure - Summary of Significant Accounting Policies Variable interest entities and unconsolidated joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesVariableInterestEntitiesAndUnconsolidatedJointVenturesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies Variable interest entities and unconsolidated joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2401406 - Disclosure - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/PropertyAndEquipmentDetails</Role>
      <ShortName>Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2401407 - Disclosure - Estimated Useful Life (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/EstimatedUsefulLifeDetails</Role>
      <ShortName>Estimated Useful Life (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2401408 - Disclosure - Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/OtherLiabilitiesDetails</Role>
      <ShortName>Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2401409 - Disclosure - Self-Insurance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SelfInsuranceDetails</Role>
      <ShortName>Self-Insurance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2401410 - Disclosure - Summary of Significant Accounting Policies Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SummaryOfSignificantAccountingPoliciesOtherAssetsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Stock Based Compensation Summary of Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationSummaryOfStockOptionActivityDetails</Role>
      <ShortName>Stock Based Compensation Summary of Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Stock Based Compensation Fair Value Assumptions for Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationFairValueAssumptionsForStockOptionsDetails</Role>
      <ShortName>Stock Based Compensation Fair Value Assumptions for Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Stock Based Compensation Stock Based Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationStockBasedCompensationDetails</Role>
      <ShortName>Stock Based Compensation Stock Based Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2410405 - Disclosure - Stock Based Compensation Profit Sharing Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationProfitSharingPlanDetails</Role>
      <ShortName>Stock Based Compensation Profit Sharing Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2410406 - Disclosure - Stock Based Compensation Performance share units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/StockBasedCompensationPerformanceShareUnitsDetails</Role>
      <ShortName>Stock Based Compensation Performance share units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2419402 - Disclosure - Fair Value Measurements Notional Amount of Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsNotionalAmountOfFinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements Notional Amount of Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2419403 - Disclosure - Fair Value Measurements Assets and Liabilities Measured on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements Assets and Liabilities Measured on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2419404 - Disclosure - Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsLossGainOnAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/FairValueMeasurementsFairValueMeasurementsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2419405 - Disclosure - Fair Value Measurements Balance Sheet Location of Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsBalanceSheetLocationOfFinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements Balance Sheet Location of Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2419406 - Disclosure - Fair Value Measurements Assets and Liabilities Measured on a Non-Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsAssetsAndLiabilitiesMeasuredOnNonRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements Assets and Liabilities Measured on a Non-Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2419407 - Disclosure - Fair Value Measurements Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsFinancialInstrumentsDetails</Role>
      <ShortName>Fair Value Measurements Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2419408 - Disclosure - Fair Value Measurements Fair Value of Financial Instrument Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/FairValueMeasurementsFairValueOfFinancialInstrumentAssumptionsDetails</Role>
      <ShortName>Fair Value Measurements Fair Value of Financial Instrument Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2422402 - Disclosure - Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InventoryDetails</Role>
      <ShortName>Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mihomes.com/role/InventoryInventoryTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2422403 - Disclosure - Inventory Model Home Accumulated Depreciation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InventoryModelHomeAccumulatedDepreciation</Role>
      <ShortName>Inventory Model Home Accumulated Depreciation</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2422404 - Disclosure - Inventory Other Inventory Items - Homes under construction not subject to a sale contract (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InventoryOtherInventoryItemsHomesUnderConstructionNotSubjectToSaleContractDetails</Role>
      <ShortName>Inventory Other Inventory Items - Homes under construction not subject to a sale contract (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2428401 - Disclosure - Transactions with Related Parties Transactions with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/TransactionsWithRelatedPartiesTransactionsWithRelatedPartiesDetails</Role>
      <ShortName>Transactions with Related Parties Transactions with Related Parties (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2431402 - Disclosure - Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InvestmentInUnconsolidatedJointVenturesInvestmentInUnconsolidatedJointVenturesDetails</Role>
      <ShortName>Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2431403 - Disclosure - Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures Balance Sheet Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InvestmentInUnconsolidatedJointVenturesInvestmentInUnconsolidatedJointVenturesBalanceSheetInformationDetails</Role>
      <ShortName>Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures Balance Sheet Information (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2431404 - Disclosure - Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures Income Statement Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/InvestmentInUnconsolidatedJointVenturesInvestmentInUnconsolidatedJointVenturesIncomeStatementInformationDetails</Role>
      <ShortName>Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures Income Statement Information (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2434401 - Disclosure - Guarantees and Indemnifications Guarantees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/GuaranteesAndIndemnificationsGuaranteesDetails</Role>
      <ShortName>Guarantees and Indemnifications Guarantees (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2437402 - Disclosure - Commitments and Contingencies Warranty (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommitmentsAndContingenciesWarrantyDetails</Role>
      <ShortName>Commitments and Contingencies Warranty (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2437403 - Disclosure - Commitments and Contingencies Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2437404 - Disclosure - Commitments and Contingencies Legal (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommitmentsAndContingenciesLegalDetails</Role>
      <ShortName>Commitments and Contingencies Legal (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2446402 - Disclosure - Lease Commitments Lease Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/LeaseCommitmentsLeaseCommitmentsDetails</Role>
      <ShortName>Lease Commitments Lease Commitments (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2447402 - Disclosure - Community Development District Infrastructure and Related Obligations Community Development District Infrastructure and Related Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/CommunityDevelopmentDistrictInfrastructureAndRelatedObligationsCommunityDevelopmentDistrictInfrastructureAndRelatedObligationsDetails</Role>
      <ShortName>Community Development District Infrastructure and Related Obligations Community Development District Infrastructure and Related Obligations (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2449402 - Disclosure - Debt Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/DebtDebtDetails</Role>
      <ShortName>Debt Debt (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2449403 - Disclosure - Debt MIF Warehousing Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/DebtMifWarehousingAgreementDetails</Role>
      <ShortName>Debt MIF Warehousing Agreement (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2449404 - Disclosure - Debt Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.mihomes.com/role/DebtSeniorNotesDetails</Role>
      <ShortName>Debt Senior Notes (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2449405 - Disclosure - Debt Notes Payable - Other (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.mihomes.com/role/DebtNotesPayableOtherDetails</Role>
      <ShortName>Debt Notes Payable - Other (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2449406 - Disclosure - Debt Debt Maturities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/DebtDebtMaturitiesDetails</Role>
      <ShortName>Debt Debt Maturities (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2450401 - Disclosure - Preferred Shares Preferred Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/PreferredSharesPreferredSharesDetails</Role>
      <ShortName>Preferred Shares Preferred Shares (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2451402 - Disclosure - Earnings per Share Earnings per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/EarningsPerShareEarningsPerShareDetails</Role>
      <ShortName>Earnings per Share Earnings per Share (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2451403 - Disclosure - Earnings per Share Earnings per Share (Textuals) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/EarningsPerShareEarningsPerShareTextualsDetails</Role>
      <ShortName>Earnings per Share Earnings per Share (Textuals) (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2452402 - Disclosure - Income Taxes Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Income Taxes Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2452403 - Disclosure - Income Taxes Benefit From Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesBenefitFromIncomeTaxesDetails</Role>
      <ShortName>Income Taxes Benefit From Income Taxes (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2452404 - Disclosure - Income Taxes Income Tax Disclosure (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesIncomeTaxDisclosureDetails</Role>
      <ShortName>Income Taxes Income Tax Disclosure (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2452405 - Disclosure - Income Taxes Income Tax Reconciliation of Effective Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesIncomeTaxReconciliationOfEffectiveTaxRateDetails</Role>
      <ShortName>Income Taxes Income Tax Reconciliation of Effective Tax Rate (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2452406 - Disclosure - Income Taxes Net Operating Loss Carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails</Role>
      <ShortName>Income Taxes Net Operating Loss Carryforwards (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2453402 - Disclosure - Business Segments Business Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/BusinessSegmentsBusinessSegmentsDetails</Role>
      <ShortName>Business Segments Business Segments (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2453403 - Disclosure - Business Segments Business Segments - Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/BusinessSegmentsBusinessSegmentsAssetsDetails</Role>
      <ShortName>Business Segments Business Segments - Assets (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2453404 - Disclosure - Business Segments Business Segments - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/BusinessSegmentsBusinessSegmentsTextualsDetails</Role>
      <ShortName>Business Segments Business Segments - Textuals (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2454402 - Disclosure - Supplemental Guarantor Information  Supplemental Guarantor Information - Income Statement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementalGuarantorInformationSupplementalGuarantorInformationIncomeStatementDetails</Role>
      <ShortName>Supplemental Guarantor Information  Supplemental Guarantor Information - Income Statement (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2454403 - Disclosure - Supplemental Guarantor Information Supplemental Guarantor Information - Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementalGuarantorInformationSupplementalGuarantorInformationBalanceSheetDetails</Role>
      <ShortName>Supplemental Guarantor Information Supplemental Guarantor Information - Balance Sheet (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2454404 - Disclosure - Supplemental Guarantor Information Supplemental Guarantor Information - Statements of Cash Flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementalGuarantorInformationSupplementalGuarantorInformationStatementsOfCashFlowsDetails</Role>
      <ShortName>Supplemental Guarantor Information Supplemental Guarantor Information - Statements of Cash Flows (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="mho-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2455402 - Disclosure - Supplementary Financial Data Supplementary Financial Data (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mihomes.com/role/SupplementaryFinancialDataSupplementaryFinancialDataDetails</Role>
      <ShortName>Supplementary Financial Data Supplementary Financial Data (Details)</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>mho-20161231.xml</File>
    <File>mho-20161231.xsd</File>
    <File>mho-20161231_cal.xml</File>
    <File>mho-20161231_def.xml</File>
    <File>mho-20161231_lab.xml</File>
    <File>mho-20161231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
