| 
           Investments in Unconsolidated Entities (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Mar. 31, 2015 
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           Dec. 31, 2014 
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|---|---|---|---|---|---|---|
| Assets: | ||||||
| Cash | $ 5,284mth_EquityMethodInvestmentSummarizedFinancialInformationCashAndCashEquivalent | $ 6,471mth_EquityMethodInvestmentSummarizedFinancialInformationCashAndCashEquivalent | ||||
| Real estate | 34,437mth_EquityMethodInvestmentSummarizedFinancialInformationRealEstateInventory | 34,435mth_EquityMethodInvestmentSummarizedFinancialInformationRealEstateInventory | ||||
| Other assets | 3,239mth_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets | 2,990mth_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets | ||||
| Total assets | 42,960us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets | 43,896us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets | ||||
| Liabilities and equity: | ||||||
| Accounts payable and other liabilities | 5,186mth_EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndOtherLiabilities | 5,994mth_EquityMethodInvestmentSummarizedFinancialInformationAccountsPayableAndOtherLiabilities | ||||
| Notes and mortgages payable | 13,345mth_EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt | 13,346mth_EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt | ||||
| Total liabilities and equity | 42,960us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity | 43,896us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity | ||||
| Meritage Homes [Member] | ||||||
| Liabilities and equity: | ||||||
| Equity | 
7,970us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / dei_LegalEntityAxis = mth_MeritageHomesMember  | 
        [1] | 
7,735us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / dei_LegalEntityAxis = mth_MeritageHomesMember  | 
        [1] | ||
| JV Partners [Member] | ||||||
| Liabilities and equity: | ||||||
| Equity | 
$ 16,459us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / dei_LegalEntityAxis = mth_JvPartnersMember  | 
        
$ 16,821us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity / dei_LegalEntityAxis = mth_JvPartnersMember  | 
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- Definition 
          The amount of accounts payable and other liabilities reported by an equity method investment of the entity. No definition available. 
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- Definition 
          The amount of cash and cash equivalent reported by an equity method investment of the entity. No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Long Term Debt No definition available. 
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- Definition 
          Equity method investment summarized financial information other assets. No definition available. 
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- Definition 
          Equity Method Investment, Summarized Financial Information, Real Estate Inventory No definition available. 
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- Definition 
          The amount of assets reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of equity, including noncontrolling interest, reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of liabilities and equity reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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