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Note 6 - Fair Value Measurements (Details) - Carrying Value of Impaired Inventories (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Note 6 - Fair Value Measurements (Details) - Carrying Value of Impaired Inventories [Line Items]    
Carrying Value of Impaired Inventory $ 6,709mdc_CarryingValueOfImpairedInventory $ 4,187mdc_CarryingValueOfImpairedInventory
Mountain [Member]    
Note 6 - Fair Value Measurements (Details) - Carrying Value of Impaired Inventories [Line Items]    
Carrying Value of Impaired Inventory 4,378mdc_CarryingValueOfImpairedInventory
/ us-gaap_SubsegmentsAxis
= mdc_MountainMember		  
East [Member]    
Note 6 - Fair Value Measurements (Details) - Carrying Value of Impaired Inventories [Line Items]    
Carrying Value of Impaired Inventory $ 2,331mdc_CarryingValueOfImpairedInventory
/ us-gaap_SubsegmentsAxis
= mdc_EastMember		 $ 4,187mdc_CarryingValueOfImpairedInventory
/ us-gaap_SubsegmentsAxis
= mdc_EastMember