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Shareholders' Equity of MAA
 9 Months Ended
Sep. 30, 2016
Shareholders' Equity of MAA [Abstract]  
Stockholders' Equity Note Disclosure [Text Block]
Shareholders' Equity of MAA

On September 30, 2016, 75,542,583 shares of MAA's common stock and 4,143,203 OP Units (not held by MAA or its corporate affiliates) were issued and outstanding, representing a total of 79,685,786 shares and units. At September 30, 2015, 75,379,381 shares of MAA's common stock and 4,185,065 OP Units (not held by MAA or its corporate affiliates) were outstanding, representing a total of 79,564,446 shares and units. There were outstanding options to purchase 39,084 shares of MAA's common stock as of September 30, 2016 compared to outstanding options to purchase 58,112 shares of MAA common stock as of September 30, 2015.

During the nine months ended September 30, 2016, 19,727 shares of MAA's common stock were acquired from employees to satisfy minimum tax withholding obligations that arose upon vesting of restricted stock granted pursuant to approved plans. During the nine months ended September 30, 2015, 11,914 shares were acquired for that purpose.

During the nine months ended September 30, 2015, we issued 7,342 shares related to the exercise of stock options. These exercises resulted in proceeds of $0.4 million. During the nine months ended September 30, 2016, there were no stock options exercised.