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Operating and Reporting Segments (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Land closing revenue |  |  |  |  |  |  |  |  | $ 27,252,000 us-gaap_LandSales |  | $ 31,270,000 us-gaap_LandSales |  | $ 9,314,000 us-gaap_LandSales
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | 698,918,000 us-gaap_RealEstateRevenueNet | 556,776,000 us-gaap_RealEstateRevenueNet | 505,604,000 us-gaap_RealEstateRevenueNet | 408,345,000 us-gaap_RealEstateRevenueNet | 536,194,000 us-gaap_RealEstateRevenueNet | 492,080,000 us-gaap_RealEstateRevenueNet | 449,950,000 us-gaap_RealEstateRevenueNet | 336,435,000 us-gaap_RealEstateRevenueNet | 2,169,643,000 us-gaap_RealEstateRevenueNet |  | 1,814,659,000 us-gaap_RealEstateRevenueNet |  | 1,193,674,000 us-gaap_RealEstateRevenueNet
Segment operating income |  |  |  |  |  |  |  |  |  |  |  |  |
Total homebuilding segment operating income |  |  |  |  |  |  |  |  | 224,522,000 us-gaap_OperatingIncomeLoss | [1] | 209,408,000 us-gaap_OperatingIncomeLoss | [1] | 77,800,000 us-gaap_OperatingIncomeLoss
Financial services segment profit |  |  |  |  |  |  |  |  | 16,178,000 mth_FinancialServicesOperatingProfit |  | 15,954,000 mth_FinancialServicesOperatingProfit |  | 10,255,000 mth_FinancialServicesOperatingProfit
Corporate and unallocated costs |  |  |  |  |  |  |  |  | (33,245,000)mth_CorporateAndUnallocatedIncomeExpense |  | (31,216,000)mth_CorporateAndUnallocatedIncomeExpense |  | (22,619,000)mth_CorporateAndUnallocatedIncomeExpense
Loss from other unconsolidated entities, net |  |  |  |  |  |  |  |  | (447,000)mth_EarningsFromOtherUnconsolidatedEntitiesNet |  | (378,000)mth_EarningsFromOtherUnconsolidatedEntitiesNet |  | (224,000)mth_EarningsFromOtherUnconsolidatedEntitiesNet
Interest expense |  |  |  |  |  |  |  |  | (5,163,000)us-gaap_InterestExpense |  | (15,092,000)us-gaap_InterestExpense |  | (24,244,000)us-gaap_InterestExpense
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt |  | (3,796,000)us-gaap_GainsLossesOnExtinguishmentOfDebt |  | (5,772,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
Other income/(loss), net |  |  |  |  |  |  |  |  | 6,572,000 us-gaap_OtherNonoperatingIncomeExpense |  | 2,792,000 us-gaap_OtherNonoperatingIncomeExpense |  | (6,342,000)us-gaap_OtherNonoperatingIncomeExpense
Earnings before income taxes | 66,393,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 47,030,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 55,236,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 39,758,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 65,879,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 56,786,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 38,532,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 16,475,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 208,417,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  | 177,672,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  | 28,854,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
West [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Land closing revenue |  |  |  |  |  |  |  |  | 11,155,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 11,616,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 6,488,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_WestMember
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 920,244,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 937,050,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 600,227,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_WestMember
Segment operating income |  |  |  |  |  |  |  |  |  |  |  |  |
Total homebuilding segment operating income |  |  |  |  |  |  |  |  | 102,640,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 131,352,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_WestMember |  | 44,727,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_WestMember
Central [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Land closing revenue |  |  |  |  |  |  |  |  | 8,603,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 16,184,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 2,036,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_CentralMember
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 692,320,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 508,961,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 392,678,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_CentralMember
Segment operating income |  |  |  |  |  |  |  |  |  |  |  |  |
Total homebuilding segment operating income |  |  |  |  |  |  |  |  | 75,372,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 38,499,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_CentralMember |  | 17,790,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_CentralMember
East [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Land closing revenue |  |  |  |  |  |  |  |  | 7,494,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_EastMember |  | 3,470,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_EastMember |  | 790,000 us-gaap_LandSales / us-gaap_StatementGeographicalAxis = mth_EastMember
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 557,079,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_EastMember |  | 368,648,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_EastMember |  | 200,769,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementGeographicalAxis = mth_EastMember
Segment operating income |  |  |  |  |  |  |  |  |  |  |  |  |
Total homebuilding segment operating income |  |  |  |  |  |  |  |  | $ 46,510,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_EastMember |  | $ 39,557,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_EastMember |  | $ 15,283,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementGeographicalAxis = mth_EastMember
[1] | Homebuilding revenue includes the following land closing revenue, by segment: Years Ended December 31,Land closing revenue: 2014 2013 2012West $11,155 $11,616 $6,488Central 8,603 16,184 2,036East 7,494 3,470 790Total $27,252 $31,270 $9,314

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