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Business Segments Business Segments - Assets (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Segment Reporting Information [Line Items] |  |
Land purchase deposits | $ 23,495 us-gaap_AdvancesOnInventoryPurchases | $ 14,365 us-gaap_AdvancesOnInventoryPurchases
Inventory | 895,094 mho_InventorySegments | 676,570 mho_InventorySegments
Investment in unconsolidated joint ventures | 27,769 us-gaap_EquityMethodInvestments | 35,266 us-gaap_EquityMethodInvestments
Other Combined Assets | 265,052 mho_OtherCombinedAssets | 383,975 mho_OtherCombinedAssets
TOTAL ASSETS | 1,211,410 us-gaap_Assets | 1,110,176 us-gaap_Assets
Midwest Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Land purchase deposits | 4,573 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember | 2,003 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember
Inventory | 303,037 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember | 248,218 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember
Investment in unconsolidated joint ventures | 1,764 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember | 5,331 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember
Other Combined Assets | 7,933 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember | 10,571 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember
TOTAL ASSETS | 317,307 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember | 266,123 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_MidwestHomebuildingMember
Southern Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Land purchase deposits | 14,752 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember | 7,107 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember
Inventory | 331,938 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember | 236,505 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember
Investment in unconsolidated joint ventures | 26,005 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember | 29,935 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember
Other Combined Assets | 16,829 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember | 982 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember
TOTAL ASSETS | 389,524 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember | 274,529 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_SouthernHomebuildingMember
Mid-Atlantic Homebuilding [Member] |  |
Segment Reporting Information [Line Items] |  |
Land purchase deposits | 4,170 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember | 5,255 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember
Inventory | 260,119 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember | 191,847 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember
Investment in unconsolidated joint ventures | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember
Other Combined Assets | 7,536 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember | 11,050 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember
TOTAL ASSETS | 271,825 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember | 208,152 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_MidAtlanticHomebuildingMember
Corporate, Financial Services and Unallocated [Member] |  |
Segment Reporting Information [Line Items] |  |
Land purchase deposits | 0 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember | 0 us-gaap_AdvancesOnInventoryPurchases / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember
Inventory | 0 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember | 0 mho_InventorySegments / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember
Investment in unconsolidated joint ventures | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember | 0 us-gaap_EquityMethodInvestments / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember
Other Combined Assets | 232,754 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember | 361,372 mho_OtherCombinedAssets / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember
TOTAL ASSETS | $ 232,754 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember | $ 361,372 us-gaap_Assets / us-gaap_StatementGeographicalAxis = mho_CorporateFinancialServicesAndUnallocatedMember

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- Definition Inventory - Segments, which includes single-family lots, land and land development costs; land held for sale; homes under construction; model homes and furnishings; community development district infrastructure; and consolidated inventory not owned. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet including cash and cash equivalents, restricted cash, property and equipment - net, and mortgage loans held for sale. + 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 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 210.5-02.8) -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 8 -Article 5 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + 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 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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- Details
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