Debt	6 Months Ended
Jun. 30, 2011
Debt [Abstract]
Debt Disclosure [Text Block]	Debt Notes Payable - Homebuilding At June 30, 2011, borrowing availability under the Credit Facility was $21.0 million in accordance with the borrowing base calculation, and there were no borrowings outstanding or letters of credit outstanding under the Credit Facility. At June 30, 2011, the Company had pledged $67.8 million in aggregate book value of inventory to secure any borrowings that we may make in the future under the Credit Facility. At June 30, 2011, the Company was in compliance with all covenants of the Credit Facility. At June 30, 2011, there was $36.1 million outstanding under the Letter of Credit Facilities, which was collateralized with $37.0 million of the Company's cash. Notes Payable — Financial Services At June 30, 2011, M/I Financial had $26.9 million outstanding under the MIF Mortgage Warehousing Agreement, and was in compliance with all covenants of that agreement. The MIF Mortgage Warehousing Agreement replaced M/I Financial's previous $45 million secured credit agreement dated April 26, 2010. At June 30, 2011, M/I Financial had sold and not yet repurchased $5.2 million of mortgages under its uncommitted repurchase agreement that was entered into on December 27, 2010 (the "MIF Mortgage Repurchase Agreement") and was in compliance with all covenants of that agreement. As a result of the repurchase agreement, these were accounted for as secured borrowings. Senior Notes As of June 30, 2011, we had $41.4 million of our 2012 Senior Notes and $200.0 million of our 2018 Senior Notes outstanding. The 2012 Senior Notes and the 2018 Senior Notes are general, unsecured senior obligations of the Company and the subsidiary guarantors and rank equally in right of payment with all our existing and future unsecured senior indebtedness. The 2012 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our wholly-owned subsidiaries. The parent company has no independent assets or operations, and any subsidiaries of the parent company, other than the subsidiary guarantors of the 2012 Senior Notes, are minor. The 2018 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our subsidiaries that, as of the date of issuance of the notes, were guarantors under the Credit Facility. The indentures governing our 2012 Senior Notes and our 2018 Senior Notes contain restrictive covenants that limit, among other things, the ability of the Company to pay dividends on common and preferred shares, or repurchase any shares. If our "restricted payments basket," as defined in each of the indentures, is less than zero, we are restricted from making certain payments, including dividends, as well as from repurchasing any shares. At June 30, 2011, the restricted payments basket was ($208.8) million under the indenture governing our 2012 Senior Notes, and $0.3 million under the indenture governing our 2018 Senior Notes. As a result of the deficit in our restricted payments basket under the indenture governing our 2012 Senior Notes, we are currently restricted from paying dividends on our common shares and our 9.75% Series A Preferred Shares, and from repurchasing any of our common or preferred shares. Absent such a restriction in the 2012 Senior Notes, as a result of the restricted payments basket under the indenture governing the 2018 Senior Notes, as of June 30, 2011, the Company would have been restricted in aggregate to a total of $0.3 million of such payments and repurchases. These restrictions do not affect our compliance with any of the covenants contained in the Credit Facility and will not permit the lenders under the Credit Facility to accelerate any outstanding borrowings under the facility.

Debt

Notes Payable - Homebuilding

At June 30, 2011, borrowing availability under the Credit Facility was $21.0 million in accordance with the borrowing base calculation, and there were no borrowings outstanding or letters of credit outstanding under the Credit Facility. At June 30, 2011, the Company had pledged $67.8 million in aggregate book value of inventory to secure any borrowings that we may make in the future under the Credit Facility. At June 30, 2011, the Company was in compliance with all covenants of the Credit Facility.

At June 30, 2011, there was $36.1 million outstanding under the Letter of Credit Facilities, which was collateralized with $37.0 million of the Company's cash.

Notes Payable — Financial Services

At June 30, 2011, M/I Financial had $26.9 million outstanding under the MIF Mortgage Warehousing Agreement, and was in compliance with all covenants of that agreement. The MIF Mortgage Warehousing Agreement replaced M/I Financial's previous $45 million secured credit agreement dated April 26, 2010.

At June 30, 2011, M/I Financial had sold and not yet repurchased $5.2 million of mortgages under its uncommitted repurchase agreement that was entered into on December 27, 2010 (the "MIF Mortgage Repurchase Agreement") and was in compliance with all covenants of that agreement. As a result of the repurchase agreement, these were accounted for as secured borrowings.

Senior Notes

As of June 30, 2011, we had $41.4 million of our 2012 Senior Notes and $200.0 million of our 2018 Senior Notes outstanding. The 2012 Senior Notes and the 2018 Senior Notes are general, unsecured senior obligations of the Company and the subsidiary guarantors and rank equally in right of payment with all our existing and future unsecured senior indebtedness. The 2012 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our wholly-owned subsidiaries. The parent company has no independent assets or operations, and any subsidiaries of the parent company, other than the subsidiary guarantors of the 2012 Senior Notes, are minor. The 2018 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our subsidiaries that, as of the date of issuance of the notes, were guarantors under the Credit Facility.

The indentures governing our 2012 Senior Notes and our 2018 Senior Notes contain restrictive covenants that limit, among other things, the ability of the Company to pay dividends on common and preferred shares, or repurchase any shares. If our "restricted payments basket," as defined in each of the indentures, is less than zero, we are restricted from making certain payments, including dividends, as well as from repurchasing any shares. At June 30, 2011, the restricted payments basket was ($208.8) million under the indenture governing our 2012 Senior Notes, and $0.3 million under the indenture governing our 2018 Senior Notes. As a result of the deficit in our restricted payments basket under the indenture governing our 2012 Senior Notes, we are currently restricted from paying dividends on our common shares and our 9.75% Series A Preferred Shares, and from repurchasing any of our common or preferred shares. Absent such a restriction in the 2012 Senior Notes, as a result of the restricted payments basket under the indenture governing the 2018 Senior Notes, as of June 30, 2011, the Company would have been restricted in aggregate to a total of $0.3 million of such payments and repurchases. These restrictions do not affect our compliance with any of the covenants contained in the Credit Facility and will not permit the lenders under the Credit Facility to accelerate any outstanding borrowings under the facility.