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Self-Insurance (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
General Liability Insurance Deductible | $ 7,500 |  |
Aggregate General Liability Deductible | 24,800 |  |
Self Insurance Reserve | 1,800 | $ 1,600 |
General Insurance Expense | 6,500 | $ 6,100 | $ 7,800
Employee Health Care [Member] |  |  |
Self-Insurance Limit | 250 |  |
Employee Health Care Limit / Stop Loss coverage [Member] |  |  |
Self-Insurance Limit | 250 |  |
Workers Compensation Deductible [Member] |  |  |
Workers Compensation | 250 |  |
Maximum Incurred Losses not to Exceed - Ohio [Member] |  |  |
Workers Compensation | 500 |  |
Deductible for all other types of claims [Member] |  |  |
General Liability Insurance Deductible | $ 500 |  |

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- Definition Annual aggregate deductible under our general liability insurance for construction defects and warranty claims on homes delivered. + References No definition available. + Details
Name: | mho_AggregateGeneralLiabilityDeductible
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Annual deductible under our general liability insurance per occurrence for construction defects and warranty claims on homes delivered. + References No definition available. + Details
Name: | mho_GeneralLiabilityInsuranceDeductible
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Self-Insurance Limit + References No definition available. + Details
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Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Workers Compensation + References No definition available. + Details
Name: | mho_WorkersCompensation
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production (which are allocated to cost of sales). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
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- Details
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- Details
Name: | us-gaap_ProductOrServiceAxis=mho_WorkersCompensationDeductibleMember
Namespace Prefix: |
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Balance Type: |
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- Details
Name: | us-gaap_ProductOrServiceAxis=mho_MaximumIncurredLossesNotToExceedOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ProductOrServiceAxis=mho_DeductibleforallothertypesofclaimsMember
Namespace Prefix: |
Data Type: | na
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Period Type: |