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Note 20 - Equity Incentive and Employee Benefit Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Defined Contribution Plan, Cost Recognized $ 0.9us-gaap_DefinedContributionPlanCostRecognized    
Defined Contribution Plan, Employer Discretionary Contribution Amount   $ 0.9us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 0.2us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Restricted Stock [Member] | Maximum [Member] | Equity Incentive Plan 2001 [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Employee Stock Option [Member] | Maximum [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 7 years    
Employee Stock Option [Member] | Two Thousand Eleven Equity Incentive Plan [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Maximum [Member] | Equity Incentive Plan 2001 [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 7 years    
Equity Incentive Plan 2001 [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Common Stock, Capital Shares Reserved for Future Issuance 2,500,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= mdc_EquityIncentivePlan2001Member
   
Two Thousand Eleven Equity Incentive Plan [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Common Stock, Capital Shares Reserved for Future Issuance 2,500,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= mdc_TwoThousandElevenEquityIncentivePlanMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mdc_TwoThousandElevenEquityIncentivePlanMember
   
Director Stock Option Plan 2001 [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Common Stock, Capital Shares Reserved for Future Issuance 700,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= mdc_DirectorStockOptionPlan2001Member
   
Director Stock Option Plan 2011 [Member]      
Note 20 - Equity Incentive and Employee Benefit Plans (Details) [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Common Stock, Capital Shares Reserved for Future Issuance 800,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= mdc_DirectorStockOptionPlan2011Member
   
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mdc_DirectorStockOptionPlan2011Member
   
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee 25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
/ us-gaap_PlanNameAxis
= mdc_DirectorStockOptionPlan2011Member
   
ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExercisablePeriod 6 months