Annual report pursuant to Section 13 and 15(d)

Operating and Reporting Segments Operating and Reporting Segments (Details 2) (Details)

v2.4.1.9
Operating and Reporting Segments Operating and Reporting Segments (Details 2) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]      
Land closing revenue $ 27,252,000us-gaap_LandSales $ 31,270,000us-gaap_LandSales $ 9,314,000us-gaap_LandSales
West [Member]      
Segment Reporting Information [Line Items]      
Land closing revenue 11,155,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_WestMember
11,616,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_WestMember
6,488,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_WestMember
Central [Member]      
Segment Reporting Information [Line Items]      
Land closing revenue 8,603,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_CentralMember
16,184,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_CentralMember
2,036,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_CentralMember
East [Member]      
Segment Reporting Information [Line Items]      
Land closing revenue $ 7,494,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_EastMember
$ 3,470,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_EastMember
$ 790,000us-gaap_LandSales
/ us-gaap_StatementGeographicalAxis
= mth_EastMember