Debt	9 Months Ended
Sep. 30, 2013
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Debt Notes Payable - Homebuilding On July 18, 2013, the Company entered into the Credit Facility, which has a maximum borrowing availability of $200 million. The Credit Facility matures on July 18, 2016. The Credit Facility contains an uncommitted $25 million accordion feature under which its aggregate principal amount can be increased to up to $225 million, subject to certain conditions, including obtaining additional commitments from existing or new lenders, as well as a sub-limit of $100 million for the issuance of letters of credit. Interest on amounts borrowed under the Credit Facility is payable at a rate based on either the Alternate Base Rate plus 2.25% or at the Eurodollar Rate plus 3.25%. Borrowings under the Credit Facility are unsecured and availability is subject to, among other things, a borrowing base. The Credit Facility also contains certain financial covenants, including a minimum tangible net worth requirement and a maximum leverage covenant that prohibits the leverage ratio (as defined therein) from exceeding 60%. In addition, we are restricted from allowing the amount of unsold owned land to exceed exceed 125% of the sum of tangible net worth and subordinated debt, we are prohibited from making investments in Unrestricted Subsidiaries and Joint Ventures in excess of 30% of tangible net worth, and we are required to maintain either (i) an interest coverage ratio ( as defined therein) of at least 1.50 to 1.00 or (ii) liquidity (as defined therein) of an amount not less than our consolidated interest incurred during the trailing 12 months. At September 30, 2013, the Company was in compliance with all financial covenants of the Credit Facility. The Credit Facility replaced the $140 million secured revolving credit facility (the “Prior Credit Facility”) that was scheduled to mature on December 31, 2014. The guarantors of the Credit Facility are the same subsidiaries that guarantee the 2018 Senior Notes, the 2017 Convertible Senior Subordinated Notes and the 2018 Convertible Senior Subordinated Notes. The Company incurred no prepayment penalties in connection with the termination and replacement of the Prior Credit Facility; however, the Company recorded a $1.7 million loss on early extinguishment of debt related to unamortized issuance fees on the Prior Credit Facility. At September 30, 2013, borrowing availability under the Credit Facility in accordance with the borrowing base calculation was $352.9 million, so the full amount of the $200 million facility was available, and there were no borrowings outstanding and $13.9 million of letters of credit outstanding under the Credit Facility, leaving net remaining borrowing availability of $186.1 million as of September 30, 2013. The Company is party to three secured credit agreements for the issuance of letters of credit outside of the Credit Facility (collectively, the “Letter of Credit Facilities”). During the three months ended September 30, 2013, the Company extended the maturity dates on two of the Letter of Credit Facilities for an additional year to August 31, 2014 and September 30, 2014, respectively, while also increasing the maximum available amount under the facility maturing on September 30, 2014 from $8.0 million to $10.0 million. At September 30, 2013, there was $15.5 million of outstanding letters of credit in aggregate under the Company's three Letter of Credit Facilities, which were collateralized with $15.8 million of the Company's cash. Notes Payable — Financial Services In March 2013, M/I Financial amended and restated the MIF Mortgage Warehousing Agreement, which, among other things, increased the maximum borrowing availability to $80.0 million and included an accordion feature which allowed for an increase of the maximum borrowing availability of up to an additional $20.0 million (subject to certain conditions, including obtaining additional commitments from existing or new lenders), extended the expiration date to March 28, 2014, and increased the maximum principal amount permitted to be outstanding at any one time in aggregate under all warehouse credit lines to $125.0 million. The interest rate was also adjusted to a per annum rate equal to the greater of (1) the floating LIBOR rate plus 275 basis points and (2) 3.50%. On June 3, 2013, M/I Financial exercised the accordion feature described above to increase the amount of our maximum borrowing availability under the MIF Mortgage Warehousing Agreement to $100.0 million by obtaining additional bank commitments totaling $20.0 million. On November 13, 2012, M/I Financial entered into the MIF Mortgage Repurchase Facility with a maximum borrowing availability of $15.0 million and an expiration date of November 12, 2013. As is typical for similar credit facilities in the mortgage origination industry, at closing, the expiration of the MIF Mortgage Repurchase Facility was set at approximately one year and is under consideration for extension annually by the participating lenders. We expect to extend the MIF Mortgage Repurchase Facility on or prior to the current expiration date of November 12, 2013, but we cannot provide any assurance that we will be able to obtain such an extension. At September 30, 2013, M/I Financial's total combined maximum borrowing availability under the two credit facilities was $115.0 million. At September 30, 2013, M/I Financial had $55.6 million outstanding on a combined basis under its credit facilities and was in compliance with all financial covenants of those agreements. Convertible Senior Subordinated Notes In March 2013, the Company issued $86.3 million aggregate principal amount of 2018 Convertible Senior Subordinated Notes. The 2018 Convertible Senior Subordinated Notes bear interest at a rate of 3.0% per year, payable semiannually in arrears on March 1 and September 1 of each year. The 2018 Convertible Senior Subordinated Notes mature on March 1, 2018. At any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2018 Convertible Senior Subordinated Notes into the Company's common shares. The conversion rate initially equals 30.9478 shares per $1,000 of principal amount. This corresponds to an initial conversion price of approximately $32.31 per common share, which equates to approximately 2.7 million common shares. The conversion rate is subject to adjustment upon the occurrence of certain events. The 2018 Convertible Senior Subordinated Notes are fully and unconditionally guaranteed on a senior subordinated unsecured basis by those subsidiaries of the Company that are guarantors under the Company's 2018 Senior Notes and 2017 Convertible Senior Subordinated Notes. The 2018 Convertible Senior Subordinated Notes are senior subordinated unsecured obligations of the Company and the subsidiary guarantors and are subordinated in right of payment to our existing and future senior indebtedness and are also effectively subordinated to our existing and future secured indebtedness with respect to any assets comprising security or collateral for such indebtedness. The indenture governing the 2018 Convertible Senior Subordinated Notes provides that the Company may not redeem the 2018 Convertible Senior Subordinated Notes prior to March 6, 2016, but also contains provisions requiring the Company to repurchase the notes (subject to certain exceptions), at a holder's option, upon the occurrence of a fundamental change (as defined in the indenture). On or after March 6, 2016, the Company may redeem for cash any or all of the 2018 Convertible Senior Subordinated Notes (except for any 2018 Convertible Senior Subordinated Notes that the Company is required to repurchase in connection with a fundamental change), but only if the last reported sale price of the Company's common shares exceeds 130% of the applicable conversion price for the notes on each of at least 20 applicable trading days. The 20 trading days do not need to be consecutive, but must occur during a period of 30 consecutive trading days that ends within 10 trading days immediately prior to the date the Company provides the notice of redemption. The redemption price for the 2018 Convertible Senior Subordinated Notes to be redeemed will equal 100% of the principal amount, plus accrued and unpaid interest, if any. In September 2012, the Company issued $57.5 million aggregate principal amount of 2017 Convertible Senior Subordinated Notes. The 2017 Convertible Senior Subordinated Notes bear interest at a rate of 3.25% per year, payable semiannually in arrears on March 15 and September 15 of each year. The 2017 Convertible Senior Subordinated Notes mature on September 15, 2017. At any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2017 Convertible Senior Subordinated Notes into the Company's common shares. The conversion rate initially equals 42.0159 shares per $1,000 of principal amount. This corresponds to an initial conversion price of approximately $23.80 per common share, which equates to approximately 2.4 million common shares. The conversion rate is subject to adjustment upon the occurrence of certain events. The 2017 Convertible Senior Subordinated Notes are fully and unconditionally guaranteed on a senior subordinated unsecured basis by those subsidiaries of the Company that are guarantors under the Company's 2018 Senior Notes and 2018 Convertible Senior Subordinated Notes. The 2017 Convertible Senior Subordinated Notes are senior subordinated unsecured obligations of the Company and the subsidiary guarantors and are subordinated in right of payment to our existing and future senior indebtedness and are also effectively subordinated to our existing and future secured indebtedness with respect to any assets comprising security or collateral for such indebtedness. The indenture governing the 2017 Convertible Senior Subordinated Notes provides that we may not redeem the notes prior to their stated maturity date, but also contains provisions requiring the Company to repurchase the 2017 Convertible Senior Subordinated Notes (subject to certain exceptions), at a holder's option, upon the occurrence of a fundamental change (as defined in the indenture). Senior Notes As of September 30, 2013, we had $230.0 million of our 2018 Senior Notes outstanding. The 2018 Senior Notes bear interest at a rate of 8.625% per year, payable semiannually in arrears on May 15 and November 15 of each year, and mature on November 15, 2018. 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 2018 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our subsidiaries, with the exception of subsidiaries that are primarily engaged in the business of mortgage financing, title insurance or similar financial businesses relating to the homebuilding and home sales business, certain subsidiaries that are not 100%-owned by the Company or another subsidiary, and other subsidiaries designated by the Company as Unrestricted Subsidiaries in accordance with the terms of the indenture. The indenture governing our 2018 Senior Notes limits our ability to pay dividends on, and repurchase, our common shares and our 9.75% Series A Preferred Shares (the “Series A Preferred Shares”) to the amount of the positive balance in our “restricted payments basket,” as defined in the indenture. The restricted payments basket was $127.5 million at September 30, 2013. The increase in the balance of our restricted payments basket from the second quarter of 2013 was primarily due to the net income of our Restricted Subsidiaries in the third quarter of 2013, offset partially by a $1.2 million dividend payment made on our Series A Preferred Shares on September 16, 2013. We are permitted to pay dividends on, and repurchase, our common shares and Series A Preferred Shares to the extent of the positive balance in our restricted payments basket. The determination to pay future dividends on, or make future repurchases of, our common shares or Series A Preferred Shares will be at the discretion of our board of directors and will depend upon our results of operations, financial condition, capital requirements and compliance with debt covenants and the terms of our Series A Preferred Shares, and other factors deemed relevant by our board of directors.

Debt

Notes Payable - Homebuilding

On July 18, 2013, the Company entered into the Credit Facility, which has a maximum borrowing availability of $200 million. The Credit Facility matures on July 18, 2016. The Credit Facility contains an uncommitted $25 million accordion feature under which its aggregate principal amount can be increased to up to $225 million, subject to certain conditions, including obtaining additional commitments from existing or new lenders, as well as a sub-limit of $100 million for the issuance of letters of credit. Interest on amounts borrowed under the Credit Facility is payable at a rate based on either the Alternate Base Rate plus 2.25% or at the Eurodollar Rate plus 3.25%. Borrowings under the Credit Facility are unsecured and availability is subject to, among other things, a borrowing base. The Credit Facility also contains certain financial covenants, including a minimum tangible net worth requirement and a maximum leverage covenant that prohibits the leverage ratio (as defined therein) from exceeding 60%. In addition, we are restricted from allowing the amount of unsold owned land to exceed exceed 125% of the sum of tangible net worth and subordinated debt, we are prohibited from making investments in Unrestricted Subsidiaries and Joint Ventures in excess of 30% of tangible net worth, and we are required to maintain either (i) an interest coverage ratio ( as defined therein) of at least 1.50 to 1.00 or (ii) liquidity (as defined therein) of an amount not less than our consolidated interest incurred during the trailing 12 months. At September 30, 2013, the Company was in compliance with all financial covenants of the Credit Facility.

The Credit Facility replaced the $140 million secured revolving credit facility (the “Prior Credit Facility”) that was scheduled to mature on December 31, 2014. The guarantors of the Credit Facility are the same subsidiaries that guarantee the 2018 Senior Notes, the 2017 Convertible Senior Subordinated Notes and the 2018 Convertible Senior Subordinated Notes. The Company incurred no prepayment penalties in connection with the termination and replacement of the Prior Credit Facility; however, the Company recorded a $1.7 million loss on early extinguishment of debt related to unamortized issuance fees on the Prior Credit Facility.

At September 30, 2013, borrowing availability under the Credit Facility in accordance with the borrowing base calculation was $352.9 million, so the full amount of the $200 million facility was available, and there were no borrowings outstanding and $13.9 million of letters of credit outstanding under the Credit Facility, leaving net remaining borrowing availability of $186.1 million as of September 30, 2013.

The Company is party to three secured credit agreements for the issuance of letters of credit outside of the Credit Facility (collectively, the “Letter of Credit Facilities”). During the three months ended September 30, 2013, the Company extended the maturity dates on two of the Letter of Credit Facilities for an additional year to August 31, 2014 and September 30, 2014, respectively, while also increasing the maximum available amount under the facility maturing on September 30, 2014 from $8.0 million to $10.0 million. At September 30, 2013, there was $15.5 million of outstanding letters of credit in aggregate under the Company's three Letter of Credit Facilities, which were collateralized with $15.8 million of the Company's cash.

Notes Payable — Financial Services

In March 2013, M/I Financial amended and restated the MIF Mortgage Warehousing Agreement, which, among other things, increased the maximum borrowing availability to $80.0 million and included an accordion feature which allowed for an increase of the maximum borrowing availability of up to an additional $20.0 million (subject to certain conditions, including obtaining additional commitments from existing or new lenders), extended the expiration date to March 28, 2014, and increased the maximum principal amount permitted to be outstanding at any one time in aggregate under all warehouse credit lines to $125.0 million. The interest rate was also adjusted to a per annum rate equal to the greater of (1) the floating LIBOR rate plus 275 basis points and (2) 3.50%. On June 3, 2013, M/I Financial exercised the accordion feature described above to increase the amount of our maximum borrowing availability under the MIF Mortgage Warehousing Agreement to $100.0 million by obtaining additional bank commitments totaling $20.0 million.

On November 13, 2012, M/I Financial entered into the MIF Mortgage Repurchase Facility with a maximum borrowing availability of $15.0 million and an expiration date of November 12, 2013. As is typical for similar credit facilities in the mortgage origination industry, at closing, the expiration of the MIF Mortgage Repurchase Facility was set at approximately one year and is under consideration for extension annually by the participating lenders. We expect to extend the MIF Mortgage Repurchase Facility on or prior to the current expiration date of November 12, 2013, but we cannot provide any assurance that we will be able to obtain such an extension.

At September 30, 2013, M/I Financial's total combined maximum borrowing availability under the two credit facilities was $115.0 million. At September 30, 2013, M/I Financial had $55.6 million outstanding on a combined basis under its credit facilities and was in compliance with all financial covenants of those agreements.

Convertible Senior Subordinated Notes

In March 2013, the Company issued $86.3 million aggregate principal amount of 2018 Convertible Senior Subordinated Notes. The 2018 Convertible Senior Subordinated Notes bear interest at a rate of 3.0% per year, payable semiannually in arrears on March 1 and September 1 of each year. The 2018 Convertible Senior Subordinated Notes mature on March 1, 2018. At any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2018 Convertible Senior Subordinated Notes into the Company's common shares. The conversion rate initially equals 30.9478 shares per $1,000 of principal amount. This corresponds to an initial conversion price of approximately $32.31 per common share, which equates to approximately 2.7 million common shares. The conversion rate is subject to adjustment upon the occurrence of certain events. The 2018 Convertible Senior Subordinated Notes are fully and unconditionally guaranteed on a senior subordinated unsecured basis by those subsidiaries of the Company that are guarantors under the Company's 2018 Senior Notes and 2017 Convertible Senior Subordinated Notes. The 2018 Convertible Senior Subordinated Notes are senior subordinated unsecured obligations of the Company and the subsidiary guarantors and are subordinated in right of payment to our existing and future senior indebtedness and are also effectively subordinated to our existing and future secured indebtedness with respect to any assets comprising security or collateral for such indebtedness. The indenture governing the 2018 Convertible Senior Subordinated Notes provides that the Company may not redeem the 2018 Convertible Senior Subordinated Notes prior to March 6, 2016, but also contains provisions requiring the Company to repurchase the notes (subject to certain exceptions), at a holder's option, upon the occurrence of a fundamental change (as defined in the indenture).

On or after March 6, 2016, the Company may redeem for cash any or all of the 2018 Convertible Senior Subordinated Notes (except for any 2018 Convertible Senior Subordinated Notes that the Company is required to repurchase in connection with a fundamental change), but only if the last reported sale price of the Company's common shares exceeds 130% of the applicable conversion price for the notes on each of at least 20 applicable trading days. The 20 trading days do not need to be consecutive, but must occur during a period of 30 consecutive trading days that ends within 10 trading days immediately prior to the date the Company provides the notice of redemption. The redemption price for the 2018 Convertible Senior Subordinated Notes to be redeemed will equal 100% of the principal amount, plus accrued and unpaid interest, if any.

In September 2012, the Company issued $57.5 million aggregate principal amount of 2017 Convertible Senior Subordinated Notes. The 2017 Convertible Senior Subordinated Notes bear interest at a rate of 3.25% per year, payable semiannually in arrears on March 15 and September 15 of each year. The 2017 Convertible Senior Subordinated Notes mature on September 15, 2017. At any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2017 Convertible Senior Subordinated Notes into the Company's common shares. The conversion rate initially equals 42.0159 shares per $1,000 of principal amount. This corresponds to an initial conversion price of approximately $23.80 per common share, which equates to approximately 2.4 million common shares. The conversion rate is subject to adjustment upon the occurrence of certain events. The 2017 Convertible Senior Subordinated Notes are fully and unconditionally guaranteed on a senior subordinated unsecured basis by those subsidiaries of the Company that are guarantors under the Company's 2018 Senior Notes and 2018 Convertible Senior Subordinated Notes. The 2017 Convertible Senior Subordinated Notes are senior subordinated unsecured obligations of the Company and the subsidiary guarantors and are subordinated in right of payment to our existing and future senior indebtedness and are also effectively subordinated to our existing and future secured indebtedness with respect to any assets comprising security or collateral for such indebtedness. The indenture governing the 2017 Convertible Senior Subordinated Notes provides that we may not redeem the notes prior to their stated maturity date, but also contains provisions requiring the Company to repurchase the 2017 Convertible Senior Subordinated Notes (subject to certain exceptions), at a holder's option, upon the occurrence of a fundamental change (as defined in the indenture).

Senior Notes

As of September 30, 2013, we had $230.0 million of our 2018 Senior Notes outstanding. The 2018 Senior Notes bear interest at a rate of 8.625% per year, payable semiannually in arrears on May 15 and November 15 of each year, and mature on November 15, 2018. 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 2018 Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by all of our subsidiaries, with the exception of subsidiaries that are primarily engaged in the business of mortgage financing, title insurance or similar financial businesses relating to the homebuilding and home sales business, certain subsidiaries that are not 100%-owned by the Company or another subsidiary, and other subsidiaries designated by the Company as Unrestricted Subsidiaries in accordance with the terms of the indenture.

The indenture governing our 2018 Senior Notes limits our ability to pay dividends on, and repurchase, our common shares and our 9.75% Series A Preferred Shares (the “Series A Preferred Shares”) to the amount of the positive balance in our “restricted payments basket,” as defined in the indenture. The restricted payments basket was $127.5 million at September 30, 2013. The increase in the balance of our restricted payments basket from the second quarter of 2013 was primarily due to the net income of our Restricted Subsidiaries in the third quarter of 2013, offset partially by a $1.2 million dividend payment made on our Series A Preferred Shares on September 16, 2013. We are permitted to pay dividends on, and repurchase, our common shares and Series A Preferred Shares to the extent of the positive balance in our restricted payments basket. The determination to pay future dividends on, or make future repurchases of, our common shares or Series A Preferred Shares will be at the discretion of our board of directors and will depend upon our results of operations, financial condition, capital requirements and compliance with debt covenants and the terms of our Series A Preferred Shares, and other factors deemed relevant by our board of directors.