XML 70 R50.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Stock Based Compensation Stock Based Compensation (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | 4,228,292 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 1,007,356 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value | $ 50,100,000 | $ 45,200,000 | $ 1,000,000.0
Share-based Payment Arrangement, Expense | 5,900,000 | $ 7,500,000 | $ 5,400,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ 11,700,000 |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 8 months 12 days |  |
Non-employee Director Restricted Stock Units Awarded | 1,622 |  |
Restricted Stock Units Awarded Under the 2018 LTIP Plan | 11,354 | 26,350 | 31,997
Value of Stock Units Awarded Under the 2018 LTIP Plan | $ 1,400,000 | $ 1,500,000 | $ 1,400,000
Total Numbner of Units Outstanding Under the 2006 Director Equity Plan | 8,059 |  |
Value of Units Outstanding Under the 2006 Director Equity Plan | $ 200,000 |  |
Deferred Compensation Liability, Current and Noncurrent | 100,000 | 900,000 | 1,100,000
Stock or Unit Option Plan Expense | $ (400,000) | $ (500,000) | (400,000)
Total Stock Units Outstanding Under All Stock Option Plans | 44,651 |  |
Total Value of Units Outstanding Under All Stock Option Plans | $ 2,300,000 |  |
Deferred Compensation Equity | 5,900,000 |  |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits | $ 2,400,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Outstanding, Number | 129,941 | 0 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Grants in Period, Gross | 133,149 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Forfeitures in Period | (3,208) |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Outstanding, Weighted Average Exercise Price | $ 124.66 | $ 0 |
Share-Based Compensation Arrangements by Share-Based Payment Award, Employee RSU, Grants in Period, Weighted Average Exercise Price | 124.66 |  |
Share-Based Compensation Arrangements by Share-Based Payment Award, Employee RSU, Forfeitures in Period, Weighted Average Exercise Price | $ 124.66 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Outstanding, Number | 79,696 | 68,342 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Vested and Expected to Vest, Outstanding, Number | 68,342 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Grants in Period, Gross | 11,354 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Outstanding, Weighted Average Exercise Price | $ 67.11 | $ 57.79 |
Share-Based Compensation Arrangements by Share-Based Payment Award, Director RSU, Grants in Period, Weighted Average Exercise Price | 123.23 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ 57.79 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Outstanding, Number | 44,651 | 52,552 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Additions in Period, Gross | 846 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Outstanding, Weighted Average Exercise Price | $ 52.34 | $ 48.95 |
Share-Based Compensation Arrangements by Share-Based Payment Award, Deferred Compensation Equity Units, Additions in Period, Weighted Average Exercise Price | 135.93 |  |
Share-Based Compensation Arrangements by Share-Based Payment Award, Deferred Compensation Equity Units, Distributions in Period, Weighted Average Exercise Price | $ 40.05 |  |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ 11.5 |  |
Share-based Payment Arrangement, Expense | $ 5,900,000 | $ 7,500,000 | $ 5,400,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | 1 year 8 months 12 days |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ 11,700,000 |  |
Share-Based Payment Arrangement, Expense, Tax Benefit | $ 4.7 |  |
Share-Based Payment Arrangement, Employee RSU Award, Cost Not yet Recognized, Period for Recognition | 1 year 6 months |  |
Share-Based Payment Arrangement, Director RSU Award, Excluding Option, Cost Not yet Recognized, Amount | $ 0.5 |  |
Market Condition Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Number | 16,342 | 18,345 |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Grants in Period, Gross | 4,171 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Adjustments in Period, Gross | 3,088 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Vested in Period, Gross | (9,262) |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Intrinsic Value | $ 1,013,000 | $ 1,488,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Distributions in Period, Gross | (8,747) |  |
Performance Condition Awards [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ 1 |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Number | 65,376 | 73,392 |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Grants in Period, Gross | 16,685 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Adjustments in Period, Gross | 12,349 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Vested in Period, Gross | (37,050) |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Intrinsic Value | $ 3,913,000 | $ 6,269,000 |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | 1 |  |
Deferred Compensation Arrangement with Individual, Compensation Expense | $ 0.3 |  |

X
- Definition Non-employee Director Restricted Stock Units Awarded under the 2018 LTIP Plan + References No definition available. + Details
Name: | mho_NonEmployeeDirectorRestrictedStockUnitsAwarded
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Restricted Stock Units Awarded Under the 2018 LTIP Plan as of the balance sheet date. + References No definition available. + Details
Name: | mho_RestrictedStockUnitsAwardedUnderThe2018LTIPPlan
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Additions in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDeferredCompensationEquityUnitsAdditionsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Distributions in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDeferredCompensationEquityUnitsDistributionsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Outstanding, Number + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDeferredCompensationEquityUnitsOutstandingNumber
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Deferred Compensation Equity Units, Outstanding, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDeferredCompensationEquityUnitsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Grants in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDirectorRSUGrantsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Outstanding, Number + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDirectorRSUOutstandingNumber
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Outstanding, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDirectorRSUOutstandingWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Vested and Expected to Vest, Outstanding, Number + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDirectorRSUVestedAndExpectedToVestOutstandingNumber
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Director RSU, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardDirectorRSUVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Forfeitures in Period + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeRSUForfeituresInPeriod
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Grants in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeRSUGrantsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Outstanding, Number + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeRSUOutstandingNumber
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Employee RSU, Outstanding, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeRSUOutstandingWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Adjustments in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPSUAdjustmentsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Granted in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPSUGrantsInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Intrinsic Value + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPSUOutstandingIntrinsicValue
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Outstanding, Number + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPSUOutstandingNumber
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, PSU, Vested in Period, Gross + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardPSUVestedInPeriodGross
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units outstanding under the 2006 Director Equity Incentive Plan that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnitsOutstanding
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The value of the units outstanding under the 2006 Director Equity Incentive Plan that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementByShareBasedPaymentAwardValueOfUnitsOutstanding
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangements by Share-Based Payment Award, Deferred Compensation Equity Units, Additions in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDeferredCompensationEquityUnitsAdditionsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangements by Share-Based Payment Award, Deferred Compensation Equity Units, Distributions in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDeferredCompensationEquityUnitsDistributionsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangements by Share-Based Payment Award, Director RSU, Grants in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementsByShareBasedPaymentAwardDirectorRSUGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangements by Share-Based Payment Award, Employee RSU, Forfeitures in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEmployeeRSUForfeituresInPeriodWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Compensation Arrangements by Share-Based Payment Award, Employee RSU, Grants in Period, Weighted Average Exercise Price + References No definition available. + Details
Name: | mho_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEmployeeRSUGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | mho_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share-Based Payment Arrangement, Director RSU Award, Excluding Option, Cost Not yet Recognized, Amount + References No definition available. + Details
Name: | mho_ShareBasedPaymentArrangementDirectorRSUAwardExcludingOptionCostNotYetRecognizedAmount
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-Based Payment Arrangement, Employee RSU Award, Cost Not yet Recognized, Period for Recognition + References No definition available. + Details
Name: | mho_ShareBasedPaymentArrangementEmployeeRSUAwardCostNotYetRecognizedPeriodForRecognition
Namespace Prefix: | mho_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total number of stock units outstanding under all stock option plans as of the balance sheet date. + References No definition available. + Details
Name: | mho_StockUnitsOutstandingUnderStockOptionPlan
Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total Value of Units Outstanding Under All Stock Option Plans + References No definition available. + Details
Name: | mho_TotalValueOfUnitsOutstandingUnderAllStockOptionPlans
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Value of Stock Units Awarded Under the 2018 LTIP Plan as of the balance sheet date. + References No definition available. + Details
Name: | mho_ValueOfStockUnitsAwardedUnderThe2018LTIPPlan
Namespace Prefix: | mho_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483043/710-10-30-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-1 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Value of stock issued under share-based plans to employees or officers which is the unearned portion, accounted for under the fair value method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-2 + Details
Name: | us-gaap_DeferredCompensationEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from employee benefits, classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
Name: | us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost to be recognized for option under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 1D -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-1D Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(v) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of noncash expense for option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_StockOptionPlanExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=mho_MarketConditionAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=mho_PerformanceConditionAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |