Note 1 - Basis of Presentation (Details Textual)	Nov. 20, 2017
Stock Dividend Rate, Percentage	8.00%

The percentage rate used to calculate stock dividend payments.

No definition available.

Name:	mdc_StockDividendRatePercentage
Namespace Prefix:	mdc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration