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v3.8.0.1

Subsequent Event Subsequent Event (Details) - USD ($) $ in Thousands | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2017 | Sep. 14, 2017 | Apr. 10, 2013
Subsequent Event [Line Items] |  |  |  |
Preferred shares redeemed |  |  | 2,000 | 2,000
Payments for Repurchase of Redeemable Preferred Stock | $ 50,352 | $ 50,420 |  |

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- Definition Preferred shares redeemed + References No definition available. + Details
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Namespace Prefix: | mho_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The cash outflow for reacquisition of callable preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration