Inventory Inventory Parentheticals (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Parantheticals - Inventory [Abstract]
Model Home Accumulated Depreciation	$ 5,341	$ 4,883

Accumulated depreciation related to our model homes in inventory.

No definition available.

Name:	mho_ModelHomeAccumulatedDepreciation
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant