Investment in Unconsolidated Joint Ventures Investment in Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment in Unconsolidated LLCs [Abstract]
Maximum exposure related to investments in unconsolidated joint ventures or similar arrangements	$ 28,016
Capitalized interest and other costs included in investment in Unconsolidated Joint Ventures	$ 86	$ 411

This item represents the total amount of investment the company is exposed to related to its investment in unconsolidated joint ventures or other similar arrangements including the amount on the entity's balance sheet of its investment in an equity method investee and its related party note receivable in Other Assets.

No definition available.

Name:	mho_Maximumexposurerelatedtoinvestmentsinunconsolidatedjointventuresorsimilararrangements
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant