Debt instrument, convertible, principal amount used in conversion rate calculation.

No definition available.

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- Definition

Percent restrictions on payment of dividends per restricted payments basket

+ References

No definition available.

+ Details

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- Definition

Restricted Payments Basket, as defined in the indenture governing the Company's 2018 Senior Notes

+ References

No definition available.

+ Details

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- Definition

Restrictions on payment of dividends - beginning amount for calculation

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX210.5-02.22))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Article 5

-Subsection 20, 22

+ Details

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Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(5))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Conversion Rate

-URI http://asc.fasb.org/extlink&oid=6509012

+ Details

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Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

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- Details

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- Details

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Debt Senior Notes (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended		24 Months Ended
	Nov. 14, 2016	Dec. 31, 2014	Nov. 15, 2018	Dec. 31, 2013
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	102.156%	104.313%	100.00%
Senior notes		$ 228,469,000us-gaap_SeniorNotes		$ 228,070,000us-gaap_SeniorNotes
Preferred Stock, Dividend Rate, Percentage		9.75%
Restricted Payments Basket		148,600,000mho_RestrictedPaymentsBasket		132,700,000mho_RestrictedPaymentsBasket
2018 Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible senior subordinated notes		86,250,000
Debt Instrument, Convertible, Conversion Ratio		30.9478
Debt Instrument Convertible Principal Amount Used In Conversion Rate Calculation		1,000
Debt Instrument, Convertible, Conversion Price		$ 32.31
Stock Issued During Period, Shares, Other		2.7
Debt Instrument, Interest Rate, Stated Percentage		3.00%
2018 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		8.625%
Senior notes		230,000,000
2017 Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Convertible senior subordinated notes		57,500,000
Debt Instrument, Convertible, Conversion Ratio		42.0159
Debt Instrument Convertible Principal Amount Used In Conversion Rate Calculation		1,000
Debt Instrument, Convertible, Conversion Price		$ 23.80
Stock Issued During Period, Shares, Other		2.4
Debt Instrument, Interest Rate, Stated Percentage		3.25%
Face value [Member] \| 2018 Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes		230,000,000
Percentage of our aggregate consolidated net income added to base amount of calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends		50.00%
Percentage of net cash proceeds from sale of qualified equity interests added to base and income/loss amount in calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends		100.00%
Percentage of our aggregate consolidated net income subtracted from base amount of calculation [Member]
Debt Instrument [Line Items]
Percent restrictions on payment of dividends		100.00%
Base of restricted payments basket income calculation [Member]
Debt Instrument [Line Items]
Restrictions on payment of dividends		$ 40,000,000