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Note 17 - Commitments and Contingencies (Details) - Mortgage Loan Loss Reserve Activity (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mortgage Loan Loss Reserve Activity [Abstract]      
Balance at beginning of year $ 1,370mdc_MortgageLoanLossReserves $ 976mdc_MortgageLoanLossReserves $ 830mdc_MortgageLoanLossReserves
Expense provisions 298mdc_MortgageLoanLossExpenseProvision 1,172mdc_MortgageLoanLossExpenseProvision 437mdc_MortgageLoanLossExpenseProvision
Cash payments   (734)mdc_MortgageLoanLossPayments (226)mdc_MortgageLoanLossPayments
Adjustments (858)mdc_MortgageLoanLossReservesAdjustments (44)mdc_MortgageLoanLossReservesAdjustments (65)mdc_MortgageLoanLossReservesAdjustments
Balance at end of year $ 810mdc_MortgageLoanLossReserves $ 1,370mdc_MortgageLoanLossReserves $ 976mdc_MortgageLoanLossReserves