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Inventory and Capitalized Interest Inventory (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Inventory [Abstract] |  |
Single-family lots, land and land development costs | $ 470,317 us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts | $ 463,198 us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts
Land held for sale | 4,374 us-gaap_InventoryLandHeldForSale | 10,647 us-gaap_InventoryLandHeldForSale
Homes under construction | 403,965 us-gaap_InventoryHomesUnderConstruction | 371,119 us-gaap_InventoryHomesUnderConstruction
Model homes and furnishings - at cost (less accumulated depreciation: March 31, 2015 - $7,318; December 31, 2014 - $7,010) | 55,341 mho_InventoryModelHomesAndFurnishings | 46,780 mho_InventoryModelHomesAndFurnishings
Community development district infrastructure | 2,314 mho_CommunityDevelopmentDistrict | 2,571 mho_CommunityDevelopmentDistrict
Land Purchase Deposits | 22,194 mho_LandPurchaseDeposits | 23,495 mho_LandPurchaseDeposits
Consolidated Inventory Not Owned | 565 mho_ConsolidatedInventoryNotOwned | 779 mho_ConsolidatedInventoryNotOwned
Total Inventory | $ 959,070 us-gaap_InventoryRealEstate | $ 918,589 us-gaap_InventoryRealEstate

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- Definition A CDD is a unit of local government created to allow for the construction and maintenance of long-term infrastructure through alternative financing sources. CDDs may utilize bond financing to fund construction or acquisition of certain on-site and off-site infrastructure improvements near or within a community. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Consolidation of inventory relating to land and lot option purchases contracts in which the entity is deemed to be the primary beneficiary of the arrangements and a transaction that did not qualify as a sale of inventory under current accounting standards thus the inventory remained on the entity's balance sheet. + References No definition available. + Details
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- Details
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- Definition Carrying amount as of the balance sheet date of capitalized model homes and furnishings which will be sold at a later date. + References No definition available. + Details
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- Definition Carrying value of capitalized payments made in advance for inventory that is expected to be received within one year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of capitalized construction costs of homes for future sale. + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 + Details
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- Definition Carrying amount as of the balance sheet date of parcels of land held for sale, and on which the entity has no intention or no further intention to perform construction activities. + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 + Details
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- Definition Total of (1) improvements, (2) held-for-sale, (3) land and land under development, (4) construction-in-process, (5) mortgage loans held-in-inventory, and (6) other real estate investments which are considered inventory due to being held for sale or disposition. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities.. + 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 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 + Details
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