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Capitalized Interest (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Capitalized Interest [Abstract]
Real Estate Inventory, Capitalized Interest Costs	$ 15,296us-gaap_RealEstateInventoryCapitalizedInterestCosts	$ 13,802us-gaap_RealEstateInventoryCapitalizedInterestCosts	$ 15,376us-gaap_RealEstateInventoryCapitalizedInterestCosts	$ 18,869us-gaap_RealEstateInventoryCapitalizedInterestCosts
Interest capitalized to inventory	17,937us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred	13,601us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred	9,975us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred
Capitalized interest charged to cost of sales	(16,443)us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales	(15,175)us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales	(13,468)us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales
Interest incurred	$ 31,302us-gaap_InterestCostsIncurred	$ 29,539us-gaap_InterestCostsIncurred	$ 26,046us-gaap_InterestCostsIncurred

X

- Details

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Namespace Prefix:	mho_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total interest costs incurred during the period and either capitalized or charged against earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

Name:	us-gaap_InterestCostsIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Carrying amount as of the balance sheet date of interest costs that were capitalized to properties under development during the land development and construction period of a project, and which are included in inventory.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

Name:	us-gaap_RealEstateInventoryCapitalizedInterestCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of interest costs that had been capitalized to inventory which were charged to cost of sales during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

Name:	us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of interest capitalized to an operative builder's inventory during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

Name:	us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration