Inventory and Capitalized Interest Inventory Parentheticals (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Parantheticals - Inventory [Abstract]
Model Home Accumulated Depreciation	$ 13,327	$ 12,909

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