Guarantees and Indemnifications Guarantees (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Guarantees [Abstract]
Total of Loans Covered by Guarantees	$ 21,100	$ 48,100
Total of Guaranteed Loans Inquired About	600	600
Loan Repurchase Guarantee Liability	400	500
Guarantor Obligations, Current Carrying Value	$ 1,400	$ 700

Maximum potential amount of future payments the guarantor could be required to make under the Company's subsidiary loan repurchase guarantees.

No definition available.

+ Details

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- Definition

Total of loans covered by the guarantees discussed for which inquiries were made by the purchasers of the loans.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The total amount of loans covered by guarantees that said loans could potentially be repurchased in the case certain conditions occur.

+ References

No definition available.

+ Details

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Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

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Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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