Document and Entity Information Document (USD $)	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Entity Information [Line Items]
Entity Registrant Name	M I HOMES INC
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	38,000,000	38,000,000
Common shares, shares issued	22,101,723	22,101,723
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, shares authorized	2,000,000	2,000,000
Preferred shares, shares issued	4,000	4,000
Entity Central Index Key	0000799292
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding			18,712,283