10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2015

or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______ to ______

Commission File Number 001-12762 (Mid-America Apartment Communities, Inc.)

Commission File Number 333-190028-01 (Mid-America Apartments, L.P.)

MID-AMERICA APARTMENT COMMUNITIES, INC.

MID-AMERICA APARTMENTS, L.P.

(Exact name of registrant as specified in its charter)

Tennessee (Mid-America Apartment Communities, Inc.)	62-1543819
Tennessee (Mid-America Apartments, L.P.)	62-1543816
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

6584 Poplar Avenue, Memphis, Tennessee, 38138

(Address of principal executive offices) (Zip Code)

(901) 682-6600

(Registrant's telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.
Mid-America Apartment Communities, Inc.	YES ý	NO o
Mid-America Apartments, L.P.	YES ý	NO o
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).
Mid-America Apartment Communities, Inc.	YES ý	NO o
Mid-America Apartments, L.P.	YES ý	NO o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.
Mid-America Apartment Communities, Inc.
	Large accelerated filer ý	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
			(Do not check if a smaller reporting company)
Mid-America Apartments, L.P.
	Large accelerated filer o	Accelerated filer o	Non-accelerated filer ý	Smaller reporting company o
			(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Mid-America Apartment Communities, Inc.	YES o	NO ý
Mid-America Apartments, L.P.	YES o	NO ý

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date:

	Number of Shares Outstanding at
Class	October 26, 2015
Common Stock, $0.01 par value	75,379,381

MID-AMERICA APARTMENT COMMUNITIES, INC.

MID-AMERICA APARTMENTS, L.P.

TABLE OF CONTENTS

		Page
PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements.
Mid-America Apartment Communities, Inc.
	Condensed Consolidated Balance Sheets as of September 30, 2015 (Unaudited) and December 31, 2014 (Unaudited).	4
	Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	5
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	6
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	7
Mid-America Apartments, L.P.
	Condensed Consolidated Balance Sheets as of September 30, 2015 (Unaudited) and December 31, 2014 (Unaudited).	8
	Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	9
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	10
	Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited).	11
	Notes to Condensed Consolidated Financial Statements (Unaudited).	12
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	37
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	51
Item 4.	Controls and Procedures.	51
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings.	52
Item 1A.	Risk Factors.	52
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	52
Item 3.	Defaults Upon Senior Securities.	53
Item 4.	Mine Safety Disclosures.	53
Item 5.	Other Information.	53
Item 6.	Exhibits.	53
	Signatures.	54
	Exhibit Index.	56

1

Explanatory Note

This periodic report on Form 10-Q, or this Report, combines the quarterly reports for the quarter ended September 30, 2015 of Mid-America Apartment Communities, Inc., a Tennessee corporation and Mid-America Apartments, L.P., a Tennessee limited partnership, of which Mid-America Apartment Communities, Inc. is the sole general partner. Mid-America Apartment Communities, Inc. and its 94.7% owned subsidiary, Mid-America Apartments, L.P., are both required to file periodic reports under the Securities Exchange Act of 1934, as amended.

Unless the context otherwise requires, all references in this Report to "MAA" refer only to Mid-America Apartment Communities, Inc., and not to any of its consolidated subsidiaries. Unless the context otherwise requires, all references in this Report to "we," "us," "our," or the "Company" refer collectively to Mid-America Apartment Communities, Inc., together with its consolidated subsidiaries, including Mid-America Apartments, L.P. Unless the context otherwise requires, the references in this Report to the "Operating Partnership" or "MAALP" refer to Mid-America Apartments, L.P. together with its consolidated subsidiaries. "Common stock" refers to the common stock of MAA and "shareholders" means the holders of shares of MAA’s common stock. The limited partnership interests of the Operating Partnership are referred to as "OP Units" and the holders of the OP Units are referred to as "unitholders".

As of September 30, 2015, MAA owned 75,379,381 units (or approximately 94.7%) of the limited partnership interests of the Operating Partnership. MAA conducts substantially all of its business and holds substantially all of its assets through the Operating Partnership, and by virtue of its ownership of the OP Units and being the Operating Partnership's sole general partner, MAA has the ability to control all of the day-to-day operations of the Operating Partnership.

We believe combining the periodic reports of MAA and the Operating Partnership, including the notes to the condensed consolidated financial statements, into this Report results in the following benefits:

• enhances investors' understanding of MAA and the Operating Partnership by enabling investors to view the business as a whole in the same manner that management views and operates the business;

• eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure in this Report applies to both MAA and the Operating Partnership; and

• creates time and cost efficiencies through the preparation of one combined Report instead of two separate periodic reports.

Management operates MAA and the Operating Partnership as one business. The management of the Company is comprised of individuals who are officers of MAA and employees of the Operating Partnership. We believe it is important to understand the few differences between MAA and the Operating Partnership in the context of how MAA and the Operating Partnership operate as a consolidated company. MAA and the Operating Partnership are structured as an "umbrella partnership REIT," or UPREIT. MAA's interest in the Operating Partnership entitles MAA to share in cash distributions from, and in the profits and losses of, the Operating Partnership in proportion to MAA's percentage interest therein, and entitles MAA to vote on substantially all matters requiring a vote of the limited partners. MAA's only material asset is its ownership of limited partner interests in the Operating Partnership; therefore, MAA does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time-to-time, and guaranteeing certain debt of the Operating Partnership. The Operating Partnership holds, directly or indirectly, all of our real estate assets. Except for net proceeds from public equity issuances by MAA, which are contributed to the Operating Partnership in exchange for limited partner interests, the Operating Partnership generates the capital required by the Company's business through the Operating Partnership's operations, direct or indirect incurrence of indebtedness, and issuance of partnership units.

The presentation of MAA's shareholders' equity and the Operating Partnership's capital are the principal areas of difference between the consolidated financial statements of MAA and those of the Operating Partnership. MAA's shareholders' equity may include shares of preferred stock, shares of common stock, additional paid-in capital, cumulative earnings, cumulative distributions, noncontrolling interest, preferred units, treasury shares, accumulated other comprehensive income and redeemable common units. The Operating Partnership's capital may include common capital and preferred capital of the general partner (MAA), limited partners' preferred capital, limited partners' noncontrolling interest, accumulated other comprehensive income and redeemable common units. Redeemable common units represent the number of outstanding OP Units as of the date of the applicable balance sheet, valued for conversion at the greater of the closing market price of MAA's common stock or the aggregate value of the individual partners' capital balances. Holders of common units in the Operating Partnership (other than MAA and its entity affiliates) may require the Operating Partnership to redeem their common units, in which case the Operating Partnership may, at its option, pay the redemption price either in cash (in an amount per common unit equal, in general, to the average closing price of MAA’s common stock on the New York Stock Exchange, or NYSE, over a

2

specified period of time prior to the redemption date) or by delivering one share of our common stock (subject to adjustment under specified circumstances) for each common unit so redeemed.

In order to highlight the material differences between MAA and the Operating Partnership, this Report includes sections that separately present and discuss areas that are materially different between MAA and the Operating Partnership, including:

• the consolidated financial statements in Item 1 of this Report;

• certain accompanying notes to the financial statements, including Note 2 - Earnings per Common Share of MAA and Note 3 - Earnings per OP Unit of MAALP; and Note 9 - Shareholders' Equity of MAA and Note 10 - Partners' Capital of Mid-America Apartments, L.P.; and

• the certifications of the Chief Executive Officer and Chief Financial Officer of MAA included as Exhibits 31 and 32 to this Report.

In the sections that combine disclosure for MAA and the Operating Partnership, this Report refers to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership (directly or indirectly through one of its subsidiaries) is generally the entity that enters into contracts, holds assets and issues debt, management believes this presentation is appropriate for the reasons set forth above and because the business is one enterprise and we operate the business through the Operating Partnership.

3

Mid-America Apartment Communities, Inc.

Condensed Consolidated Balance Sheets

September 30, 2015 and December 31, 2014

(Unaudited)

(Dollars in thousands, except share data)

	September 30, 2015			December 31, 2014
Assets:
Real estate assets:
Land	$	913,045		$	913,408
Buildings and improvements	6,842,089			6,781,210
Furniture, fixtures and equipment	223,759			214,742
Development and capital improvements in progress	44,645			80,772
	8,023,538			7,990,132
Less accumulated depreciation	(1,410,155		)	(1,358,400		)
	6,613,383			6,631,732
Undeveloped land	51,779			55,997
Corporate properties, net	8,606			7,988
Investments in real estate joint ventures	1,807			1,791
Real estate assets, net	6,675,575			6,697,508
Cash and cash equivalents	44,876			26,653
Restricted cash	89,321			28,181
Deferred financing costs, net	11,901			17,812
Other assets	64,061			61,119
Goodwill	1,607			2,321
Total assets	$	6,887,341		$	6,833,594
Liabilities and equity:
Liabilities:
Secured notes payable	$	1,373,654		$	1,592,116
Unsecured notes payable	2,051,481			1,932,399
Accounts payable	10,509			8,395
Fair market value of interest rate swaps	17,953			13,392
Accrued expenses and other liabilities	243,711			219,044
Security deposits	11,446			10,526
Total liabilities	3,708,754			3,775,872
Redeemable stock	7,266			5,911
Shareholders' equity:
Common stock, $0.01 par value per share, 100,000,000 shares authorized; 75,379,381 and 75,267,675 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively (1)	754			752
Additional paid-in capital	3,623,834			3,619,270
Accumulated distributions in excess of net income	(614,500		)	(729,086		)
Accumulated other comprehensive loss	(6,306		)	(412		)
Total MAA shareholders' equity	3,003,782			2,890,524
Noncontrolling interest	167,539			161,287
Total equity	3,171,321			3,051,811
Total liabilities and equity	$	6,887,341		$	6,833,594

⁽¹⁾  Number of shares issued and outstanding represent total shares of common stock regardless of classification on the consolidated balance sheet. The number of shares classified as redeemable stock on the consolidated balance sheet for September 30, 2015 and December 31, 2014 are 88,745 and 87,818, respectively.

See accompanying notes to condensed consolidated financial statements.

4

Mid-America Apartment Communities, Inc.

Condensed Consolidated Statements of Operations

Three and nine months ended September 30, 2015 and 2014

(Unaudited)

(Dollars in thousands, except per share data)

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Operating revenues:
Rental revenues	$	239,670		$	226,584		$	710,775		$	671,695
Other property revenues	22,328			22,979			68,666			67,264
Total property revenues	261,998			249,563			779,441			738,959
Management fee income	—			11			—			154
Total operating revenues	261,998			249,574			779,441			739,113
Property operating expenses:
Personnel	26,500			26,363			78,033			76,481
Building repairs and maintenance	8,793			9,056			23,195			23,354
Real estate taxes and insurance	31,699			31,025			97,824			93,128
Utilities	23,769			23,535			67,442			66,985
Landscaping	3,900			4,068			15,032			15,557
Other operating	6,938			6,835			21,577			20,903
Depreciation and amortization	73,098			70,222			220,606			229,866
Total property operating expenses	174,697			171,104			523,709			526,274
Acquisition expense	656			13			2,155			971
Property management expenses	7,628			7,429			23,106			24,019
General and administrative expenses	5,879			6,511			19,103			16,065
Merger related expenses	—			331			—			3,202
Integration related expenses	—			147			—			7,140
Income from continuing operations before non-operating items	73,138			64,039			211,368			161,442
Interest and other non-property (expense) income	(179		)	37			(359		)	1,077
Interest expense	(29,342		)	(28,251		)	(88,801		)	(89,090		)
Loss on debt extinguishment	(5		)	(2,586		)	(3,384		)	(2,586		)
Amortization of deferred financing costs	(887		)	(1,000		)	(2,710		)	(3,485		)
Net casualty (loss) gain after insurance and other settlement proceeds	(5		)	(126		)	485			(431		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621			36,032			190,031			42,254
Gain on sale of non-depreciable real estate assets	—			—			172			535
Income before income tax expense	97,341			68,145			306,802			109,716
Income tax expense	(512		)	(442		)	(1,419		)	(1,235		)
Income from continuing operations before joint venture activity	96,829			67,703			305,383			108,481
(Loss) gain from real estate joint ventures	(1		)	3,124			(5		)	6,019
Income from continuing operations	96,828			70,827			305,378			114,500
Discontinued operations:
Loss from discontinued operations before (loss) gain on sale	—			(8		)	—			(59		)
Net casualty gain after insurance and other settlement proceeds on discontinued operations	—			3			—			—
(Loss) gain on sale of discontinued operations	—			(103		)	—			5,378
Consolidated net income	96,828			70,719			305,378			119,819
Net income attributable to noncontrolling interests	5,094			3,743			16,078			6,364
Net income available for MAA common shareholders	$	91,734		$	66,976		$	289,300		$	113,455
Earnings per common share - basic:
Income from continuing operations available for common shareholders	$	1.22		$	0.89		$	3.84		$	1.44
Discontinued property operations	—			—			—			0.07
Net income available for common shareholders	$	1.22		$	0.89		$	3.84		$	1.51
Earnings per common share - diluted:
Income from continuing operations available for common shareholders	$	1.22		$	0.89		$	3.84		$	1.44
Discontinued property operations	—			—			—			0.07
Net income available for common shareholders	$	1.22		$	0.89		$	3.84		$	1.51
Dividends declared per common share	$	0.77		$	0.73		$	2.31		$	2.19

See accompanying notes to condensed consolidated financial statements.

5

Mid-America Apartment Communities, Inc.

Condensed Consolidated Statements of Comprehensive Income

Three and nine months ended September 30, 2015 and 2014

(Unaudited)

(Dollars in thousands)

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Consolidated net income	$	96,828		$	70,719		$	305,378		$	119,819
Other comprehensive income:
Unrealized loss from the effective portion of derivative instruments	(9,269		)	(696		)	(11,812		)	(9,096		)
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments	1,607			2,589			5,590			9,399
Total comprehensive income	89,166			72,612			299,156			120,122
Less: comprehensive income attributable to noncontrolling interests	(4,690		)	(3,845		)	(15,750		)	(6,379		)
Comprehensive income attributable to MAA	$	84,476		$	68,767		$	283,406		$	113,743
See accompanying notes to condensed consolidated financial statements.

6

Mid-America Apartment Communities, Inc.

Condensed Consolidated Statements of Cash Flows

Nine months endedSeptember 30, 2015 and 2014

(Unaudited)

(Dollars in thousands)

	Nine months ended September 30,
	2015			2014
Cash flows from operating activities:
Consolidated net income	$	305,378		$	119,819
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue accretion	(952		)	(17		)
Depreciation and amortization	223,651			233,312
Stock compensation expense	4,438			3,180
Redeemable stock issued	741			690
Amortization of debt premium	(15,465		)	(20,121		)
Loss (gain) from investments in real estate joint ventures	6			(3,159		)
Loss on debt extinguishment	2,788			2,586
Derivative interest credit	(1,567		)	(2,543		)
Settlement of forward swaps	—			(3,625		)
Gain on sale of non-depreciable real estate assets	(172		)	(535		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	(190,031		)	(42,254		)
Gain on sale of discontinued operations	—			(5,378		)
Net casualty (gain) loss and other settlement proceeds	(485		)	431
Changes in assets and liabilities:
Restricted cash	(1,533		)	(11,262		)
Other assets	5,927			(5,016		)
Accounts payable	(1,211		)	(1,665		)
Accrued expenses and other	28,877			32,209
Security deposits	1,146			688
Net cash provided by operating activities	361,536			297,340
Cash flows from investing activities:
Purchases of real estate and other assets	(248,668		)	(155,679		)
Normal capital improvements	(72,786		)	(72,045		)
Construction capital and other improvements	(5,479		)	(6,287		)
Renovations to existing real estate assets	(22,470		)	(15,484		)
Development	(24,870		)	(57,705		)
Distributions from real estate joint ventures	6			15,964
Contributions to real estate joint ventures	(29		)	—
Proceeds from disposition of real estate assets	358,017			241,691
Funding of escrow for future acquisitions	(59,607		)	(5,589		)
Net cash used in investing activities	(75,886		)	(55,134		)
Cash flows from financing activities:
Net change in credit lines	8,885			(216,184		)
Proceeds from notes payable	—			396,532
Principal payments on notes payable	(92,211		)	(258,105		)
Payment of deferred financing costs	(178		)	(4,156		)
Repurchase of common stock	(957		)	(456		)
Proceeds from issuances of common shares	326			728
Exercise of stock options	420			11,916
Distributions to noncontrolling interests	(9,676		)	(9,227		)
Dividends paid on common shares	(174,036		)	(164,298		)
Net cash used in financing activities	(267,427		)	(243,250		)
Net increase (decrease) in cash and cash equivalents	18,223			(1,044		)
Cash and cash equivalents, beginning of period	26,653			89,333
Cash and cash equivalents, end of period	$	44,876		$	88,289
Supplemental disclosure of cash flow information:
Interest paid	$	97,798		$	101,252
Income taxes paid	$	2,095		$	1,596
Supplemental disclosure of noncash investing and financing activities:
Conversion of units to shares of common stock	$	236		$	992
Accrued construction in progress	$	8,333		$	6,539
Interest capitalized	$	1,313		$	1,253
Marked-to-market adjustment on derivative instruments	$	(4,632	)	$	6,471
Fair value adjustment on debt assumed	$	—		$	2,720
Loan assumption	$	—		$	52,521

See accompanying notes to condensed consolidated financial statements.

7

Mid-America Apartments, L.P.

Condensed Consolidated Balance Sheets

September 30, 2015 and December 31, 2014

(Dollars in thousands, except unit data)

	September 30, 2015			December 31, 2014
Assets:
Real estate assets:
Land	$	913,045		$	913,408
Buildings and improvements	6,842,089			6,781,210
Furniture, fixtures and equipment	223,759			214,742
Development and capital improvements in progress	44,645			80,772
	8,023,538			7,990,132
Less accumulated depreciation	(1,410,155		)	(1,358,400		)
	6,613,383			6,631,732
Undeveloped land	51,779			55,997
Corporate properties, net	8,606			7,988
Investments in real estate joint ventures	1,807			1,791
Real estate assets, net	6,675,575			6,697,508
Cash and cash equivalents	44,876			26,653
Restricted cash	89,321			28,181
Deferred financing costs, net	11,901			17,812
Other assets	64,061			61,119
Goodwill	1,607			2,321
Total assets	$	6,887,341		$	6,833,594
Liabilities and Capital:
Liabilities:
Secured notes payable	$	1,373,654		$	1,592,116
Unsecured notes payable	2,051,481			1,932,399
Accounts payable	10,509			8,395
Fair market value of interest rate swaps	17,953			13,392
Accrued expenses and other liabilities	243,711			219,044
Security deposits	11,446			10,526
Due to general partner	19			19
Total liabilities	3,708,773			3,775,891
Redeemable units	7,266			5,911
Capital:
General partner: 75,379,381 OP Units outstanding at September 30, 2015 and 75,267,675 OP Units outstanding at December 31, 2014 (1)	3,010,361			2,890,858
Limited partners: 4,185,065 OP Units outstanding at September 30, 2015 and 4,191,152 OP Units outstanding at December 31, 2014 (1)	167,539			161,310
Accumulated other comprehensive loss	(6,598		)	(376		)
Total capital	3,171,302			3,051,792
Total liabilities and capital	$	6,887,341		$	6,833,594

⁽¹⁾  Number of units outstanding represent total OP Units regardless of classification on the consolidated balance sheet. The number of units classified as redeemable units on the consolidated balance sheet at September 30, 2015 and December 31, 2014 are 88,745 and 87,818, respectively.

See accompanying notes to condensed consolidated financial statements.

8

Mid-America Apartments, L.P.

Condensed Consolidated Statements of Operations

Three and nine months ended September 30, 2015 and 2014

(Unaudited)

(Dollars in thousands, except per unit data)

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Operating revenues:
Rental revenues	$	239,670		$	226,584		$	710,775		$	671,695
Other property revenues	22,328			22,979			68,666			67,264
Total property revenues	261,998			249,563			779,441			738,959
Management fee income	—			11			—			154
Total operating revenues	261,998			249,574			779,441			739,113
Property operating expenses:
Personnel	26,500			26,363			78,033			76,481
Building repairs and maintenance	8,793			9,056			23,195			23,354
Real estate taxes and insurance	31,699			31,025			97,824			93,128
Utilities	23,769			23,535			67,442			66,985
Landscaping	3,900			4,068			15,032			15,557
Other operating	6,938			6,835			21,577			20,903
Depreciation and amortization	73,098			70,222			220,606			229,866
Total property operating expenses	174,697			171,104			523,709			526,274
Acquisition expense	656			13			2,155			971
Property management expenses	7,628			7,429			23,106			24,019
General and administrative expenses	5,879			6,511			19,103			16,065
Merger related expenses	—			331			—			3,202
Integration related expenses	—			147			—			7,140
Income from continuing operations before non-operating items	73,138			64,039			211,368			161,442
Interest and other non-property (expense) income	(179		)	37			(359		)	1,077
Interest expense	(29,342		)	(28,251		)	(88,801		)	(89,090		)
Loss on debt extinguishment	(5		)	(2,586		)	(3,384		)	(2,586		)
Amortization of deferred financing costs	(887		)	(1,000		)	(2,710		)	(3,485		)
Net casualty (loss) gain after insurance and other settlement proceeds	(5		)	(126		)	485			(431		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621			36,032			190,031			42,254
Gain on sale of non-depreciable real estate assets	—			—			172			535
Income before income tax expense	97,341			68,145			306,802			109,716
Income tax expense	(512		)	(442		)	(1,419		)	(1,235		)
Income from continuing operations before joint venture activity	96,829			67,703			305,383			108,481
(Loss) gain from real estate joint ventures	(1		)	3,124			(5		)	6,019
Income from continuing operations	96,828			70,827			305,378			114,500
Discontinued operations:
Loss from discontinued operations before (loss) gain on sale	—			(8		)	—			(59		)
Net casualty gain after insurance and other settlement proceeds on discontinued operations	—			3			—			—
(Loss) gain on sale of discontinued operations	—			(103		)	—			5,378
Net income available for Mid-America Apartments, L.P. common unitholders	$	96,828		$	70,719		$	305,378		$	119,819
Earnings per common unit - basic:
Income from continuing operations available for common unitholders	$	1.22		$	0.89		$	3.84		$	1.44
Income from discontinued operations available for common unitholders	—			—			—			0.07
Net income available for common unitholders	$	1.22		$	0.89		$	3.84		$	1.51
Earnings per common unit - diluted:
Income from continuing operations available for common unitholders	$	1.22		$	0.89		$	3.84		$	1.44
Income from discontinued operations available for common unitholders	—			—			—			0.07
Net income available for common unitholders	$	1.22		$	0.89		$	3.84		$	1.51
Distributions declared per common unit	$	0.77		$	0.73		$	2.31		$	2.19

See accompanying notes to condensed consolidated financial statements.

9

Mid-America Apartments, L.P.

Condensed Consolidated Statements of Comprehensive Income

Three and nine months ended September 30, 2015 and 2014

(Unaudited)

(Dollars in thousands)

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Net income available for Mid-America Apartments, L.P. common unitholders	$	96,828		$	70,719		$	305,378		$	119,819
Other comprehensive income:
Unrealized loss from the effective portion of derivative instruments	(9,269		)	(696		)	(11,812		)	(9,096		)
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments	1,607			2,589			5,590			9,399
Comprehensive income attributable to Mid-America Apartments, L.P.	$	89,166		$	72,612		$	299,156		$	120,122
See accompanying notes to condensed consolidated financial statements.

10

Mid-America Apartments, L.P.

Condensed Consolidated Statements of Cash Flows

Nine months endedSeptember 30, 2015 and 2014

(Unaudited)

(Dollars in thousands)

	Nine months ended September 30,
	2015			2014
Cash flows from operating activities:
Consolidated net income	$	305,378		$	119,819
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue accretion	(952		)	(17		)
Depreciation and amortization	223,651			233,312
Stock compensation expense	4,438			3,180
Redeemable units issued	741			690
Amortization of debt premium	(15,465		)	(20,121		)
Loss (gain) from investments in real estate joint ventures	6			(3,159		)
Loss on debt extinguishment	2,788			2,586
Derivative interest credit	(1,567		)	(2,543		)
Settlement of forward swaps	—			(3,625		)
Gain on sale of non-depreciable real estate assets	(172		)	(535		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	(190,031		)	(42,254		)
Gain on sale of discontinued operations	—			(5,378		)
Net casualty (gain) loss and other settlement proceeds	(485		)	431
Changes in assets and liabilities:
Restricted cash	(1,533		)	(11,262		)
Other assets	5,927			(5,016		)
Accounts payable	(1,211		)	(1,665		)
Accrued expenses and other	28,877			32,209
Security deposits	1,146			688
Net cash provided by operating activities	361,536			297,340
Cash flows from investing activities:
Purchases of real estate and other assets	(248,668		)	(155,679		)
Normal capital improvements	(72,786		)	(72,045		)
Construction capital and other improvements	(5,479		)	(6,287		)
Renovations to existing real estate assets	(22,470		)	(15,484		)
Development	(24,870		)	(57,705		)
Distributions from real estate joint ventures	6			15,964
Contributions to real estate joint ventures	(29		)	—
Proceeds from disposition of real estate assets	358,017			241,691
Funding of escrow for future acquisitions	(59,607		)	(5,589		)
Net cash used in investing activities	(75,886		)	(55,134		)
Cash flows from financing activities:
Net change in credit lines	8,885			(216,184		)
Proceeds from notes payable	—			396,532
Principal payments on notes payable	(92,211		)	(258,105		)
Payment of deferred financing costs	(178		)	(4,156		)
Repurchase of common units	(957		)	(456		)
Proceeds from issuances of common units	326			728
Exercise of unit options	420			11,916
Distributions paid on common units	(183,712		)	(173,525		)
Net cash used in financing activities	(267,427		)	(243,250		)
Net increase (decrease) in cash and cash equivalents	18,223			(1,044		)
Cash and cash equivalents, beginning of period	26,653			89,333
Cash and cash equivalents, end of period	$	44,876		$	88,289
Supplemental disclosure of cash flow information:
Interest paid	$	97,798		$	101,252
Income taxes paid	$	2,095		$	1,596
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	$	8,333		$	6,539
Interest capitalized	$	1,313		$	1,253
Marked-to-market adjustment on derivative instruments	$	(4,632	)	$	6,471
Fair value adjustment on debt assumed	$	—		$	2,720
Loan assumption	$	—		$	52,521

See accompanying notes to condensed consolidated financial statements.

11

Mid-America Apartment Communities, Inc. and Mid-America Apartments, L.P.

Notes to Condensed Consolidated Financial Statements

September 30, 2015 and 2014

(Unaudited)

1.           Basis of Presentation and Principles of Consolidation and Significant Accounting Policies

Unless the context otherwise requires, all references to "we," "us," "our," or the "Company" refer collectively to Mid-America Apartment Communities, Inc., together with its consolidated subsidiaries, including the Mid-America Apartments, L.P. Unless the context otherwise requires, all references to "MAA" refer only to Mid-America Apartment Communities, Inc., and not any of its consolidated subsidiaries. Unless the context otherwise requires, the references to the "Operating Partnership" or "MAALP" refer to Mid-America Apartments, L.P. together with its consolidated subsidiaries. "Common stock" refers to the common stock of MAA and "shareholders" means the holders of shares of MAA’s common stock. The limited partnership interests of the Operating Partnership are referred to as "OP Units" and the holders of the OP Units are referred to as "unitholders".

As of September 30, 2015, MAA owned 75,379,381 units (or approximately 94.7%) of the limited partnership interests of the Operating Partnership. MAA conducts substantially all of its business and holds substantially all of its assets through the Operating Partnership, and by virtue of its ownership of the OP Units and being the Operating Partnership's sole general partner, MAA has the ability to control all of the day-to-day operations of the Operating Partnership.

We believe combining the notes to the consolidated financial statements of MAA and MAALP results in the following benefits:

• enhances a readers' understanding of MAA and the Operating Partnership by enabling the reader to view the business as a whole in the same manner that management views and operates the business; and

• eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure applies to both MAA and the Operating Partnership.

Management operates MAA and the Operating Partnership as one business. The management of the Company is comprised of individuals who are officers of MAA and employees of the Operating Partnership. We believe it is important to understand the few differences between MAA and the Operating Partnership in the context of how MAA and the Operating Partnership operate as a consolidated company. MAA and the Operating Partnership are structured as an "umbrella partnership REIT," or UPREIT. MAA's interest in the Operating Partnership entitles MAA to share in cash distributions from, and in the profits and losses of, the Operating Partnership in proportion to MAA's percentage interest therein, and entitles MAA to vote on substantially all matters requiring a vote of the limited partners. MAA's only material asset is its ownership of limited partner interests in the Operating Partnership; therefore, MAA does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time, and guaranteeing certain debt of the Operating Partnership. The Operating Partnership holds, directly or indirectly, all of our real estate assets. Except for net proceeds from public equity issuances by MAA, which are contributed to the Operating Partnership in exchange for OP Units, the Operating Partnership generates the capital required by our business through the Operating Partnership's operations, direct or indirect incurrence of indebtedness, and issuance of partnership units.

The presentation of MAA's shareholders' equity and the Operating Partnership's capital are the principal areas of difference between the consolidated financial statements of MAA and those of the Operating Partnership. MAA's shareholders' equity may include shares of preferred stock, shares of common stock, additional paid-in capital, cumulative earnings, cumulative distributions, noncontrolling interest, preferred units, treasury shares, accumulated other comprehensive income and redeemable common units. The Operating Partnership's capital may include common capital and preferred capital of the general partner (MAA), limited partners' preferred capital, limited partners' noncontrolling interest, accumulated other comprehensive income and redeemable common units. Redeemable common units represent the number of outstanding OP Units as of the date of the applicable balance sheet, valued at the greater of the closing market price of MAA's common stock or the aggregate value of the individual partners' capital balances. Each redeemable OP Unit may be redeemed by the holder thereof for either cash equal to the fair market value of one share of common stock of MAA at the time of such redemption or, at the option of MAA, one share of common stock of MAA.

As of September 30, 2015, we owned and operated253 apartment communities comprising79,024 apartments located in 15 states principally through the Operating Partnership.

12

As of September 30, 2015, we had four development communities under construction totaling806 units, with232 units completed. Total expected costs for the development projects are $119.5 million, of which $65.5 million has been incurred through September 30, 2015. We expect to complete construction on the first project by the fourthquarter of 2015, the second project by the firstquarter of 2016, the third project by the third quarter of 2016, and the fourth project by the second quarter of 2017. Five of our multifamily properties include retail components with approximately 163,000 square feet of gross leasable area. We also have one wholly owned commercial property, which we acquired through our merger with Colonial Properties Trust, or Colonial, with approximately 196,000 square feet of gross leasable area, excluding tenant owned anchor stores, and one partially owned commercial property with approximately 30,000 square feet of gross leasable area.

Reclassifications

In order to present comparative financial statements, certain reclassifications have been made to prior period numbers. In our Form 10-Q for the three and nine months ended September 30, 2014, we reported approximately $0.3 million and $1.0 million, respectively, in permits and fees and general maintenance costs in the Other operating expense line of our Condensed Consolidated Statement of Operations. These costs have been reclassified to Building repairs and maintenance for the three and nine months ended September 30, 2014, presented in the Condensed Consolidated Statement of Operations included in this Report. In our Form 10-Q for the three and nine months ended September 30, 2014, we also reported approximately $8.6 million and $25.4 million, respectively, primarily for cable TV, trash removal, and telephone costs, in the Other operating expense line of our Condensed Consolidated Statement of Operations. These costs have been reclassified to Utilities for the three and nine months ended September 30, 2014, presented in the Condensed Consolidated Statement of Operations included in this Report. In our Form 10-K for the year ended December 31, 2014, we reported approximately $36.5 million as Assets held for sale, excluded from Real estate assets, net. These assets have been reclassified to Assets held for use within the applicable line items in the Condensed Consolidated Balance Sheet included in this Report. See further discussion on the held for sale reclassification in Note 12 to these condensed consolidated financial statements. These changes have been made in order to provide better insight into our property operating expenses and balance sheet position.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements have been prepared by our management in accordance with United States generally accepted accounting principles, or GAAP, and applicable rules and regulations of the Securities and Exchange Commission, or the SEC. The condensed consolidated financial statements of MAA presented herein include the accounts of MAA, the Operating Partnership, and all other subsidiaries in which MAA has a controlling financial interest. MAA owns approximately 94.7% to 100% of all consolidated subsidiaries. The condensed consolidated financial statements of MAALP presented herein include the accounts of MAALP and all other subsidiaries in which MAALP has a controlling financial interest. MAALP owns, directly or indirectly, 100% of all consolidated subsidiaries. In our opinion, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included, and all such adjustments were of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated in consolidation.

We invest in entities which may qualify as variable interest entities, or VIE. A VIE is a legal entity in which the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support or, as a group, the holders of the equity investment at risk lack the power to direct the activities of a legal entity as well as the obligation to absorb its expected losses or the right to receive its expected residual returns. We consolidate all VIEs for which we are the primary beneficiary and use the equity method to account for investments that qualify as VIEs but for which we are not the primary beneficiary. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including but not limited to, those activities that most significantly impact the VIE's economic performance and which party controls such activities.

We use the equity method of accounting for our investments in entities for which we exercise significant influence, but do not have the ability to exercise control. These entities are not variable interest entities. The factors considered in determining that we do not have the ability to exercise control include ownership of voting interests and participatory rights of investors.

13

2.    Earnings per Common Share of MAA

Basic earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of shares outstanding during the period.  All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common shareholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per share. Both the unvested restricted shares and other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis with our diluted earnings per share being the more dilutive of the treasury stock or two-class methods.  OP Units are included in dilutive earnings per share calculations when they are dilutive to earnings per share. For the three and nine months ended September 30, 2015 and 2014, MAA's basic earnings per share is computed using the two-class method, and our diluted earnings per share is computed using the more dilutive of the treasury stock method or two-class method, as presented below:

14

(dollars and shares in thousands, except per share amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Shares Outstanding
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Weighted average partnership units outstanding	—			(1)	—			(1)	—			(1)	—			(1)
Effect of dilutive securities	—			(2)	—			(2)	—			(2)	—			(2)
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Calculation of Earnings per Share - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)		(3,748		)		(16,078		)		(6,080		)
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,948			$	288,632			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				5				—				(284		)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(103	)		$	—			$	5,025
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Earnings per share - basic	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Share - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)	(1)	(3,751		)	(1)	(16,080		)	(1)	(6,080		)	(1)
Income from continuing operations allocated to unvested restricted shares	(221		)	(2)	(131		)	(2)	(668		)	(2)	(212		)	(2)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,945			$	288,630			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				8			(1)	—				(284		)	(1)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(2)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(100	)		$	—			$	5,025
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Earnings per share - diluted	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For both the three and nine months ended September 30, 2015 and 2014, 4.2 million operating partnership units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

⁽²⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

15

3.    Earnings per OP Unit of MAALP

Basic earnings per OP Unit is computed by dividing net income available for common unitholders by the weighted average number of units outstanding during the period. All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common unitholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per OP unit. Diluted earnings per OP Unit reflects the potential dilution that could occur if securities or other contracts to issue OP Units were exercised or converted into OP Units. A reconciliation of the numerators and denominators of the basic and diluted earnings per unit computations for the three and nine months ended September 30, 2015 and 2014 is presented below:

(dollars and units in thousands, except per unit amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Units Outstanding
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Effect of dilutive securities	—			(1)	—			(1)	—			(1)	—			(1)
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Calculation of Earnings per Unit - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Earnings per unit - basic:	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Unit - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)	(1)	(131		)	(1)	(668		)	(1)	(212		)	(1)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(1)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Earnings per unit - diluted:	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

16

4.    MAA Equity

Total equity and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per share and per unit data):

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2014	$	752	$	3,619,270		$	(729,086	)	$	(412	)	$	161,287		$	3,051,811
Net income						289,300						16,078			305,378
Other comprehensive loss - derivative instruments (cash flow hedges)									(5,894		)	(328		)	(6,222		)
Issuance and registration of common shares	2		324												326
Shares repurchased and retired	—		(957		)										(957		)
Exercise of stock options	—		420												420
Shares issued in exchange for units	—		236									(236		)	—
Redeemable stock fair market value adjustment						(614		)							(614		)
Adjustment for noncontrolling interest ownership in operating partnership			(409		)							409			—
Amortization of unearned compensation			4,950												4,950
Dividends on common stock ($2.31 per share)						(174,100		)				—			(174,100		)
Dividends on noncontrolling interest units ($2.31 per unit)												(9,671		)	(9,671		)
EQUITY BALANCE SEPTEMBER 30, 2015	$	754	$	3,623,834		$	(614,500	)	$	(6,306	)	$	167,539		$	3,171,321

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2013	$	747	$	3,599,549		$	(653,593	)	$	108	$	166,726		$	3,113,537
Net income						113,455					6,364			119,819
Other comprehensive income - derivative instruments (cash flow hedges)									288		15			303
Issuance and registration of common shares	2		726											728
Shares repurchased and retired	—		(456		)									(456		)
Exercise of stock options	3		11,913											11,916
Shares issued in exchange for units	—		992								(992		)	—
Shares issued in exchange for redeemable stock			998											998
Redeemable stock fair market value adjustment						(286		)						(286		)
Adjustment for noncontrolling interest ownership in operating partnership			(55		)						55			—
Amortization of unearned compensation			3,180											3,180
Dividends on common stock ($2.19 per share)						(164,598		)			—			(164,598		)
Dividends on noncontrolling interest units ($2.19 per unit)											(9,209		)	(9,209		)
EQUITY BALANCE SEPTEMBER 30, 2014	$	752	$	3,616,847		$	(705,022	)	$	396	$	162,959		$	3,075,932

17

5.    MAALP Capital

Total capital and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per unit data):

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2014	$	161,310		$	2,890,858		$	(376	)	$	3,051,792
Net income	16,078			289,300						305,378
Other comprehensive loss - derivative instruments (cash flow hedges)							(6,222		)	(6,222		)
Issuance of units				326						326
Units repurchased and retired				(957		)				(957		)
Exercise of unit options				420						420
General partner units issued in exchange for limited partner units	(236		)	236						—
Redeemable units fair market value adjustment				(614		)				(614		)
Adjustment for limited partners' capital at redemption value	58			(58		)				—
Amortization of unearned compensation				4,950						4,950
Distributions ($2.31 per unit)	(9,671		)	(174,100		)				(183,771		)
CAPITAL BALANCE SEPTEMBER 30, 2015	$	167,539		$	3,010,361		$	(6,598	)	$	3,171,302

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2013	$	166,746		$	2,946,598		$	174	$	3,113,518
Net income	6,364			113,455					119,819
Other comprehensive income - derivative instruments (cash flow hedges)							303		303
Issuance of units				728					728
Units repurchased and retired				(456		)			(456		)
Exercise of unit options				11,916					11,916
General partner units issued in exchange for limited partner units	(992		)	992					—
Units issued in exchange for redeemable units				998					998
Redeemable units fair market value adjustment				(286		)			(286		)
Adjustment for limited partners capital at redemption value	28			(28		)			—
Amortization of unearned compensation				3,180					3,180
Distributions ($2.19 per unit)	(9,209		)	(164,598		)			(173,807		)
CAPITAL BALANCE SEPTEMBER 30, 2014	$	162,937		$	2,912,499		$	477	$	3,075,913

6.           Borrowings

The weighted average interest rate at September 30, 2015 for the $3.43 billion of debt outstanding was 3.6%, compared to the weighted average interest rate of 3.7% on $3.52 billion of debt outstanding at December 31, 2014. Our debt consists of an unsecured credit facility, unsecured term loans, senior unsecured notes, a secured credit facility with Fannie Mae, and secured property mortgages. We utilize fixed rate borrowings, interest rate swaps, and interest rate caps to manage our current and future interest rate risk. More details on our borrowings can be found in the schedules presented later in this Report.

At September 30, 2015, we had $145.8 million (after considering the impact of interest rate swap and cap agreements in effect) of secured variable rate debt outstanding at an average interest rate of 0.8% and $125.0 million of capped secured variable rate debt at an average interest rate of 0.8%. The interest rate on all other secured debt, totaling $1.1 billion, was hedged or fixed at an average interest rate of 4.0%. Additionally, we had $1.9 billion of senior unsecured notes and term loans fixed at an average interest rate of 4.0% and a $500 million variable rate credit facility with an average interest rate of 1.3% with $184.0 million borrowed at September 30, 2015.

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Unsecured Credit Facility

We maintain a $500.0 million unsecured credit facility with fourteen banks led by KeyBank National Association (the KeyBank Facility). The KeyBank Facility includes an expansion option up to $800.0 million. The KeyBank Facility bears an interest rate of LIBOR plus a spread of 0.90% to 1.70% based on an investment grade pricing grid and is currently bearing interest at 1.29%. This credit line expires in August 2017 with two six-month extension options. At September 30, 2015, we had $496.7 million total capacity under the KeyBank Facility with $184.0 million borrowed. Approximately $3.3 million of the KeyBank Facility is used to support letters of credit.

Unsecured Term Loans

We also maintain three term loans with a syndicate of banks, led by KeyBank, Wells Fargo, and US Bank, respectively. The KeyBank term loan has a balance of $150 million, matures in 2017, and has a variable interest rate of LIBOR plus a spread of 1.10% to 2.05% based on our credit ratings. The Wells Fargo term loan has a balance of $250 million and matures in 2018. The US Bank term loan has a balance of $150 million and matures in 2020. Both the Wells Fargo and US Bank term loans have variable interest rates of LIBOR plus a spread of 0.90% to 1.90% based on our credit ratings. As of September 30, 2015, the KeyBank term loan was bearing interest at a rate of LIBOR plus 1.35%. As of September 30, 2015, the Wells Fargo and US Bank term loans were bearing interest at a rate of LIBOR plus 1.15%.

Senior Unsecured Notes

We have also issued both public and private unsecured senior notes. As ofSeptember 30, 2015, we have approximately $1.0 billion of publicly issued bonds and $310.0 million of private placement notes. These senior unsecured notes are longer term in nature and usually mature within five to 12 years.

Secured Credit Facility

We also maintain a $360.0 million secured credit facility with Prudential Mortgage Capital, which is credit enhanced by Fannie Mae, or the Fannie Mae Facility, of which $320.8 million is collateralized and available to borrow. The Fannie Mae Facility provides for both fixed and variable rate borrowings and has Fannie Mae rate tranches with maturities from 2015 through 2018. The interest rate on the variable portion renews every 90 days and is based on the Fannie Mae discount mortgage backed security rate on the date of renewal, which, for us, has historically approximated three-month LIBOR less an average of 0.17% over the life of the Fannie Mae Facility, plus a fee of 0.62%. Borrowings under the Fannie Mae Facility totaled $320.8 million at September 30, 2015, consisting of $50.0 million under a fixed portion at a rate of 4.7%, and the remaining $270.8 million under the variable rate portion of the Fannie Mae Facility at an average rate of 0.8%. On February 17, 2015, we paid off $91.1 million related to a group of mortgages associated with a previous tax-free Fannie Mae Facility. As part of this transaction, we recorded a $3.1 million loss on debt extinguishment, primarily due to the write-off of unamortized financing costs associated with these mortgages.

Each of our credit facilities is subject to various covenants and conditions on usage, and the secured facility is subject to periodic re-evaluation of collateral. If we were to fail to satisfy a condition to borrowing or in the event of a reduction in real estate values, the available credit under one or more of the facilities could be reduced, which could adversely affect our liquidity. Moreover, if we were to fail to make a payment or violate a covenant under a credit facility, after applicable cure periods, one or more of our lenders could declare a default, accelerate the due date for repayment of all amounts outstanding and/or foreclose on properties securing such facilities. A default on an obligation to repay outstanding debt could also create a cross default on a separate piece of debt, whereby one or more of our lenders could accelerate the due date for repayment of all amounts outstanding and/or foreclose on properties securing the related facilities. Any such event could have a material adverse effect on the Company. We believe that we were in compliance with these covenants and conditions on usage at September 30, 2015.

Secured Property Mortgages

At September 30, 2015, we had $1.1 billion of fixed rate conventional property mortgages with an average interest rate of 3.9% and an average maturity in 2019.

On January 30, 2015, we paid off a $15.2 million mortgage associated with the Farmington Village apartment community. We recorded a $0.2 million loss on debt extinguishment due to paying off the mortgage prior to maturity.

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On June 1, 2015, we paid off a $25.5 million mortgage associated with the Colonial Grand at Wilmington apartment community. The payoff was a scheduled maturity of the loan.

On June 15, 2015, we paid off a $10.1 million mortgage associated with the Reserve at Woodwind Lakes apartment community. The payoff was a scheduled maturity of the loan.

On September 1, 2015, we paid off a $11.6 million mortgage associated with the Colonial Village at Timber Crest apartment community. The payoff was a scheduled maturity of the loan.

On September 30, 2015, we paid off a $23.5 million mortgage associated with the Sanctuary at Oglethorpe apartment community. The payoff was a scheduled maturity of the loan.

In addition to these payoffs, we have paid $6.3 million associated with property mortgage principal amortizations.

Guarantees

Of the debt mentioned above, MAA fully and unconditionally guarantees the following debt incurred by MAALP for the full terms of the respective instruments:

• $360.0 million of the Fannie Mae Facilities, of which $320.8 million has been borrowed as of September 30, 2015;

• $500.0 million KeyBank credit facility, of which $184.0 million has been borrowed as of September 30, 2015;

• $310.0 million of senior unsecured notes, all of which has been borrowed as of September 30, 2015; and

• $550.0 million of term loans, all of which has been borrowed as of September 30, 2015.

Borrowings Overview

The following table summarizes our outstanding debt structure as of September 30, 2015 (dollars in thousands):

	Borrowed Balance		Effective Rate		Average Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	1,052,869	3.9	%	7/10/2019
Fannie Mae Facility	50,000		4.7	%	3/31/2017
Total fixed rate secured debt	$	1,102,869	3.9	%	6/2/2019
Variable Rate Secured Debt (1)
Fannie Mae Facility	270,785		0.8	%	2/18/2017
Total variable rate secured debt	$	270,785	0.8	%	2/18/2017
Total Secured Debt	$	1,373,654	3.3	%	12/20/2018
Unsecured Debt
Variable rate credit facility	$	184,000	1.3	%	8/7/2017
Term loans fixed with swaps	550,000		3.1	%	11/10/2017
Fixed rate senior bonds	1,317,481		4.5	%	12/4/2021
Total Unsecured Debt	$	2,051,481	3.8	%	6/12/2020
Total Outstanding Debt	$	3,425,135	3.6	%	9/18/2019

⁽¹⁾ Includes capped balances.

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7.           Derivatives and Hedging Activities

Risk Management Objective of Using Derivatives

We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of our debt funding and the use of derivative financial instruments. Specifically, we enter into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future contractual and forecasted cash amounts, principally related to our borrowings, the value of which are determined by changing interest rates, related cash flows and other factors.

Cash Flow Hedges of Interest Rate Risk

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish these objectives, we use interest rate swaps and interest rate caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps designated as cash flow hedges involve the receipt of variable amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the three and nine months ended September 30, 2015 and 2014, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt and forecasted issuances of fixed-rate debt.  The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings.

During the three months ended September 30, 2015 and 2014, we recorded ineffectiveness of $44,000 (increase to interest expense) and $25,000 (increase to interest expense), respectively, and during the nine months ended September 30, 2015 and 2014, we recorded ineffectiveness of $117,000 (increase to interest expense) and $88,000 (increase to interest expense), respectively, mainly attributable to a mismatch in the underlying indices of the derivatives and the hedged interest payments made on our variable-rate debt and due to the designation of acquired interest rate swaps with a non-zero fair value at inception.

Amounts reported in accumulated other comprehensive income related to derivatives designated as qualifying cash flow hedges will be reclassified to interest expense as interest payments are made on our variable-rate or fixed-rate debt. During the next 12 months, we estimate that an additional $5.0 million will be reclassified to earnings as an increase to interest expense, which primarily represents the difference between our fixed interest rate swap payments and the projected variable interest rate swap payments.

As of September 30, 2015, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	5	$	125,000,000
Interest Rate Swaps(1)	7	$	550,000,000

⁽¹⁾ Excludes three forward rate swaps totaling $150 million where the debt has not yet been issued. These swaps are not included in our debt discussion in Note 6 or Management's Discussion and Analysis.

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Tabular Disclosure of Fair Values of Derivative Instruments on the Balance Sheets

The table below presents the fair value of our derivative financial instruments as well as their classification on the Condensed Consolidated Balance Sheet as of September 30, 2015 and December 31, 2014.

Fair Values of Derivative Instruments on the Condensed Consolidated Balance Sheets as of September 30, 2015 and

December 31, 2014 (dollars in thousands)

	Asset Derivatives					Liability Derivatives
		September 30, 2015		December 31, 2014			September 30, 2015		December 31, 2014
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	6	$	72	Fair market value of interest rate swaps	$	17,953	$	13,392
Total derivatives designated as hedging instruments		$	6	$	72		$	17,953	$	13,392
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	—	$	6		$	—	$	—
Total derivatives not designated as hedging instruments		$	—	$	6		$	—	$	—

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Tabular Disclosure of the Effect of Derivative Instruments on the Statements of Operations

The table below presents the effect of our derivative financial instruments on the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 and 2014.

Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations for the

Three and nine months ended September 30, 2015 and 2014 (dollars in thousands)

Derivatives in Cash Flow Hedging Relationships	Amount of  Gain or (Loss) Recognized in  OCI on Derivative  (Effective Portion)						Location of Gain or (Loss) Reclassified  from Accumulated OCI into Income (Effective Portion)	Amount of   Gain or (Loss) Reclassified from Accumulated  OCI into Income  (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Three months ended September 30,	2015			2014				2015			2014				2015			2014
Interest rate contracts	$	(9,269	)	$	(696	)	Interest expense	$	(1,607	)	$	(2,589	)	Interest expense	$	(44	)	$	(25	)
Total derivatives in cash flow hedging relationships	$	(9,269	)	$	(696	)		$	(1,607	)	$	(2,589	)		$	(44	)	$	(25	)
Nine months ended September 30,
Interest rate contracts	$	(11,812	)	$	(9,096	)	Interest expense	$	(5,590	)	$	(9,399	)	Interest expense	$	(117	)	$	(88	)
Total derivatives in cash flow hedging relationships	$	(11,812	)	$	(9,096	)		$	(5,590	)	$	(9,399	)		$	(117	)	$	(88	)
Derivatives Not Designated as Hedging Instruments
Three months ended September 30,														Location of Gain or (Loss) Recognized in Income	2015			2014
Interest rate contracts														Interest expense	$	—		$	(10	)
Total															$	—		$	(10	)
Nine months ended September 30,
Interest rate contracts														Interest expense	$	(3	)	$	(138	)
Total															$	(3	)	$	(138	)

Credit-Risk-Related Contingent Features

As of September 30, 2015, derivatives that were in a net liability position and subject to credit-risk-related contingent features had a termination value of $18.9 million, which includes accrued interest but excludes any adjustment for nonperformance risk. These derivatives had a fair value, gross of asset positions, of $18.0 million at September 30, 2015.

Certain of our derivative contracts contain a provision where we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of

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September 30, 2015, we had not breached the provisions of these agreements. If we had breached these provisions, we could have been required to settle our obligations under the agreements at the termination value of $18.9 million.

Although our derivative contracts are subject to master netting arrangements, which serve as credit mitigants to both us and our counterparties under certain situations, we do not net our derivative fair values or any existing rights or obligations to cash collateral on the Condensed Consolidated Balance Sheets.

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The table below presents a gross presentation, the effects of offsetting, and a net presentation of our derivatives as of September 30, 2015 and December 31, 2014. The net amounts of derivative assets or liabilities can be reconciled to the Tabular Disclosure of Fair Values of Derivative Instruments above, which also provides the location that derivative assets and liabilities are presented on the Condensed Consolidated Balance Sheets (dollars in thousands):

Offsetting of Derivative Assets
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	6	$	—	$	6	$	—	$	—	$	6
Offsetting of Derivative Liabilities
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	17,953	$	—	$	17,953	$	—	$	—	$	17,953
Offsetting of Derivative Assets
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	78	$	—	$	78	$	—	$	—	$	78
Offsetting of Derivative Liabilities
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	13,392	$	—	$	13,392	$	—	$	—	$	13,392

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Other Comprehensive Income

Our other comprehensive income consists entirely of gains and losses attributable to the effective portion of our cash flow hedges. The chart below shows the change in the balance for the nine months ended September 30, 2015 and 2014 (dollars in thousands):

Changes in Accumulated Other Comprehensive Income by Component
	Affected Line Item in the Consolidated Statements Of Operations	Gains and Losses on Cash Flow Hedges
		for the nine months ended September 30,
		2015			2014
Beginning balance		$	(412	)	$	108
Other comprehensive loss before reclassifications		(11,812		)	(9,096		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	5,590			9,399
Net current-period other comprehensive loss (income) attributable to noncontrolling interest		328			(15		)
Net current-period other comprehensive (loss) income attributable to MAA		(5,894		)	288
Ending balance		$	(6,306	)	$	396

See also discussions in Note 8 to the Condensed Consolidated Financial Statements.

8.           Fair Value Disclosure of Financial Instruments

Cash and cash equivalents, restricted cash, accounts payable, accrued expenses and other liabilities and security deposits are carried at amounts that reasonably approximate their fair value due to their short term nature.

We apply Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, 820 Fair Value Measurements and Disclosures, or ASC 820.ASC 820 defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.

ASC 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement.  Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability.  As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Fixed rate notes payable at September 30, 2015 and December 31, 2014, totaled $2.42 billion and $2.50 billion, respectively, and had estimated fair values of $2.46 billion and $2.54 billion (excluding prepayment penalties), respectively, as of

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September 30, 2015 and December 31, 2014. The carrying value of variable rate notes payable (excluding the effect of interest rate swap and cap agreements) at September 30, 2015 and December 31, 2014, totaled $1.01 billion and $1.02 billion, respectively, and had estimated fair values of $0.99 billion and $0.97 billion (excluding prepayment penalties), respectively, as of September 30, 2015 and December 31, 2014. The valuation of our debt is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each debt instrument. This analysis reflects the contractual terms of the debt, and uses observable market-based inputs, including interest rate curves and credit spreads. The fair values of fixed debt are determined by using the present value of future cash outflows discounted with the applicable current market rate plus a credit spread. The fair values of variable debt are determined using the stated variable rate plus the current market credit spread. Our variable rates reset every 30 to 90 days and we conclude that these rates reasonably estimate current market rates. We have determined that inputs used to value our debt fall within Level 2 of the fair value hierarchy and therefore our fair market valuation of debt is considered Level 2 in the fair value hierarchy.

Currently, we use interest rate swaps and interest rate caps (options)to manage our interest raterisk. The valuation of these instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

The fair values of interest rate options are determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates rise above the strike rate of the caps. The variable interest rates used in the calculation of projected receipts on the cap are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities.

To comply with the provisions of ASC 820, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees. In conjunction with the FASB's fair value measurement guidance, we made an accounting policy election to measure the credit risk of our derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.

We have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, and as a result, all of our derivatives held as of September 30, 2015 and December 31, 2014 were classified as Level 2 of the fair value hierarchy.

The table below presents our assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014, aggregated by the level in the fair value hierarchy within which those measurements fall.

Assets and Liabilities Measured at Fair Value on a Recurring Basis at September 30, 2015

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							September 30, 2015
Assets
Derivative financial instruments	$	—	$	6	$	—	$	6
Liabilities
Derivative financial instruments	$	—	$	17,953	$	—	$	17,953

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Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2014

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							December 31, 2014
Assets
Derivative financial instruments	$	—	$	78	$	—	$	78
Liabilities
Derivative financial instruments	$	—	$	13,392	$	—	$	13,392

The fair value estimates presented herein are based on information available to management as of September 30, 2015 and December 31, 2014.  These estimates are not necessarily indicative of the amounts we could ultimately realize.  See also discussions in Note 7 to the Condensed Consolidated Financial Statements.

9.           Shareholders' Equity of MAA

On September 30, 2015, 75,379,381 shares of common stock of MAA and 4,185,065 OP Units were issued and outstanding, representing a total of 79,564,446 shares and units. At September 30, 2014, 75,242,266 shares of common stock of MAA and 4,202,123 OP Units were outstanding, representing a total of 79,444,389 shares and units. There were 58,112 outstanding options as of September 30, 2015 compared to 81,654 outstanding options as of September 30, 2014.

During the nine months ended September 30, 2015, 11,914 shares of our 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, 2014, 9,292 shares were acquired for these purposes.

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, 2014, we issued 263,259 shares related to the exercise of stock options. These exercises resulted in proceeds of $11.9 million.

10.    Partners' Capital of Mid-America Apartments, L.P.

OP Units

As of September 30, 2015, there were 79,564,446 OP Units outstanding, 75,379,381, or 94.7%, of which were owned by MAA, the Operating Partnership's general partner. The remaining 4,185,065 OP Units were owned by non-affiliated limited partners (Class A Limited Partners). As of September 30, 2014, there were 79,444,389 OP Units outstanding, 75,242,266, or 94.7%, of which were owned by MAA and 4,202,123 of which were owned by the Class A Limited Partners.

MAA, as the sole general partner of the Operating Partnership, has full, complete and exclusive discretion to manage and control the business of the Operating Partnership subject to the restrictions specifically contained within the Operating Partnership's agreement of limited partnership, or the Partnership Agreement. Unless otherwise stated in the Partnership Agreement, this power includes, but is not limited to acquiring, leasing, or disposing of any real property; constructing buildings and making other improvements to properties owned; borrowing money, modifying or extinguishing current borrowings, issuing evidence of indebtedness, and securing such indebtedness by mortgage, deed of trust, pledge or other lien on the Operating Partnership's assets; and distribution of Operating Partnership cash or other assets in accordance with the Partnership Agreement. MAA can generally, at its sole discretion, issue and redeem OP Units and determine the consideration to be received or the redemption price to be paid, as applicable. MAA may delegate these and other powers granted if MAA remains in supervision of the designee.

Under the Partnership Agreement, the Operating Partnership may issue Class A OP Units and Class B OP Units. Class A OP Units may only be held by limited partners other than MAA, in its capacity as general partner of the Operating Partnership, or its subsidiaries, while Class B OP Units may only be held by MAA, in its capacity as general partner of the Operating Partnership, and as of September 30, 2015, a total of 4,185,065 Class A OP Units in the Operating Partnership were held by

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limited partners other than MAA or its subsidiaries, while a total of 75,379,381 Class B OP Units were held by MAA. In general, the limited partners do not have the power to participate in the management or control of the Operating Partnership's business except in limited circumstances including changes in the general partner and protective rights if the general partner acts outside of the provisions provided in the Partnership Agreement. The transferability of Class A OP Units is also limited by the Partnership Agreement.

Net income is allocated to the general partner and limited partners based on their respective ownership percentages of the OP Units. Issuance or redemption of additional Class A OP Units or Class B OP Units changes the relative ownership percentage of the partners. The issuance of Class B OP Units generally occurs when MAA issues common stock and the proceeds from that issuance are contributed to the Operating Partnership in exchange for the issuance to MAA of a number of OP Units equal to the number of shares of common stock issued. Likewise, if MAA repurchases or redeems outstanding shares of common stock, the Operating Partnership generally redeems an equal number of Class B OP Units with similar terms held by MAA for a redemption price equal to the purchase price of those shares of common stock. At each reporting period, the allocation between general partner capital and limited partner capital is adjusted to account for the change in the respective percentage ownership of the underlying capital of the Operating Partnership. Holders of the Class A OP Units may require MAA to redeem their Class A OP Units, in which case MAA may, at its option, pay the redemption price either in cash (in an amount per Class A OP Unit equal, in general, to the average closing price of MAA's common stock on the New York Stock Exchange over a specified period prior to the redemption date) or by delivering one share of MAA common stock (subject to adjustment under specified circumstances) for each Class A OP Unit so redeemed.

At September 30, 2015, a total of 4,185,065 Class A OP Units were outstanding and redeemable for 4,185,065 shares of MAA common stock or approximately $342.6 million, based on the closing price of MAA’s common stock on September 30, 2015 of $81.87 per share, at MAA’s option. At September 30, 2014, a total of 4,202,123 Class A OP Units were outstanding and redeemable for 4,202,123 shares of MAA common stock or approximately $275.9 million, based on the closing price of MAA’s common stock on September 30, 2014 of $65.65 per share, at MAA’s option.

The Operating Partnership pays the same per unit distribution in respect to the OP Units as the per share dividend MAA pays in respect to its common and preferred stock.

11.     Legal Proceedings

We, along with multiple other parties, are named defendants in lawsuits arising out of alleged construction deficiencies with respect to condominium units at Regatta at James Island in Charleston, South Carolina. The Regatta at James Island property was developed by certain of our subsidiaries prior to MAA's merger with Colonial and constructed by Colonial Construction Services, LLC. The condominiums were constructed in 2006 and all 212 units were sold. The lawsuits, one filed on behalf of the condominium homeowners association and one filed by three of the unit owners (purportedly on behalf of all unit owners), were filed in South Carolina state court (Charleston County) in August 2012, against various parties involved in the development and construction of the Regatta at James Island property, including the contractors, subcontractors, architect, developer, and product manufacturers. The plaintiffs are seeking damages resulting primarily from alleged construction deficiencies, but the amount plaintiffs seek to recover has not been disclosed. The lawsuits are currently in discovery. We are continuing to investigate the matter and evaluate our options and intend to vigorously defend ourselves against these claims. No assurance can be given that the matter will be resolved favorably to us. We have included in our loss contingency an estimate of probable loss in connection with this matter, but currently cannot reasonably estimate any further possible loss, or any further range of reasonably possible loss, in connection with this matter.

In addition, we are subject to various other legal proceedings and claims that arise in the ordinary course of our business operations. Matters which arise out of allegations of bodily injury, property damage, and employment practices are generally covered by insurance. While the resolution of these other matters cannot be predicted with certainty, management currently believes the final outcome of such matters will not have a material adverse effect on our financial position, results of operations or cash flows.

Loss Contingencies

The outcomes of the claims, disputes and legal proceedings described or referenced above are subject to significant uncertainty. We record an accrual for loss contingencies when a loss is probable and the amount of the loss can be reasonably estimated. We review these accruals quarterly and make revisions based on changes in facts and circumstances. When a loss contingency is not both probable and reasonably estimable, we do not accrue the loss. However, for material loss contingencies, if the unrecorded loss (or an additional loss in excess of the accrual) is at least a reasonable possibility and material, then we disclose

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a reasonable estimate of the possible loss, or range of loss, if such reasonable estimate can be made. If we cannot make a reasonable estimate of the possible loss, or range of loss, then that is disclosed.

The assessment of whether a loss is probable or a reasonable possibility, and whether the loss or range of loss is reasonably estimable, often involves a series of complex judgments about future events. Among the factors that we consider in this assessment, including with respect to the matters disclosed in this Note, are the nature of existing legal proceedings and claims, the asserted or possible damages or loss contingency (if reasonably estimable), the progress of the matter, existing law and precedent, the opinions or views of legal counsel and other advisers, our experience in similar matters, the facts available to us at the time of assessment, and how we intend to respond, or have responded, to the proceeding or claim. Our assessment of these factors may change over time as individual proceedings or claims progress. For matters where we are not currently able to reasonably estimate a range of reasonably possible loss, the factors that have contributed to this determination include the following: (i) the damages sought are indeterminate; (ii) the proceedings are in the early stages; (iii) the matters involve novel or unsettled legal theories or a large or uncertain number of actual or potential cases or parties; and/or (iv) discussions with the parties in matters that are expected ultimately to be resolved through negotiation and settlement have not reached the point where we believe a reasonable estimate of loss, or range of loss, can be made. In such instances, we believe that there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss or business impact, if any.

As of September 30, 2015 and December 31, 2014, our accrual for loss contingencies was $13.1 million and $12.3 million in the aggregate, respectively.

12.           Discontinued Operations

In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. We adopted ASU 2014-08 during the period ending March 31, 2014. Due to the early adoption of ASU 2014-08, we did not classify Brookwood Mall, Colonial Village at North Arlington, Colonial Village at Vista Ridge, Greenbrook, Colonial Village at Inverness, Colonial Village at Charleston Place, Colonial Village at Huntleigh Woods, Colonial Village at Ashford Place, or Colonial Promenade Huntsville, which were sold during the year ended December 31, 2014, as discontinued operations. We also did not classify Vistas, Austin Chase, Fairways at Hartland, Fountain Lake, Post House Jackson, Post House North, Woodwinds, Oaks, Woods of Post House, Bradford Pointe, Huntington Chase, Westbury Creek, Colony at South Park, Paddock Park, Anatole, Bradford Chase, Sutton Place, Southland Station, Colonial Promenade Craft Farms, Colonial Grand Wilmington, Savannah Creek, or Whisperwood, which were sold during the nine months ended September 30, 2015, as discontinued operations.

As part of the merger with Colonial on October 1, 2013, we acquired the Nord du Lac commercial property. Starting on October 1, 2013, the criteria for classifying this property as Held for Sale were met and as a result the assets and liabilities for this property were presented as held for sale in the Condensed Consolidated Balance Sheets , and the results of operations were included within discontinued operations in the Condensed Consolidated Statement of Operations for all periods presented through the period ended March 31, 2015. Additionally, we ceased recording depreciation and amortization following the held for sale designation. On May 29, 2015, after several amendments to the original sale agreement extending the closing date, the buyer elected not to purchase the property and consequently, the Nord Du Lac Property no longer met the criteria to be classified as held for sale as of June 30, 2015. Approximately $34.1 million of real estate assets that were classified as held for sale as of March 31, 2015 was reclassified to held for use as of June 30, 2015, and included in the applicable line items in the accompanying Condensed Consolidated Balance Sheets. We measured the property to be reclassified at the lower of (1) its carrying value before being classified as held for sale, adjusted for any depreciation and amortization expense that would have been recognized had the asset been continuously classified as held for use or (2) its fair value at the date of the subsequent decision not to sell. As a result of this reclassification, we recorded an additional $2.3 million of depreciation and amortization expense during the three months ended June 30, 2015, which represents the depreciation and amortization expense on the Nord du Lac property that would have been recognized had the property been continuously classified as held for use. Additionally, the related results of operations previously recorded in discontinued operations have been included in the applicable line items of continuing operations in the accompanying Condensed Consolidated Statements of Operations for all periods presented, and thus are not presented in discontinued operations in the tables below.

Willow Creek, one of the properties that we sold during the nine months ended September 30, 2014, has been classified as discontinued operations in the Consolidated Statements of Operations. Willow Creek is included in discontinued operations because it was shown in discontinued operations as of December 31, 2013, and thus is not subject to ASU 2014-08.

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The following is a summary of income from continuing and discontinued operations attributable to MAA and noncontrolling interest for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Income from continuing operations:
Attributable to MAA	$	91,734	$	67,079		$	289,300	$	108,420
Attributable to noncontrolling interest	5,094		3,748			16,078		6,080
Income from continuing operations	$	96,828	$	70,827		$	305,378	$	114,500
Income from discontinued operations:
Attributable to MAA	$	—	$	(103	)	$	—	$	5,035
Attributable to noncontrolling interest	—		(5		)	—		284
Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

The following is a summary of earnings from discontinued operations for MAA and MAALP for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Revenues
Rental revenues	$	—	$	—		$	—	$	76
Other revenues	—		—			—		10
Total revenues	$	—	$	—		$	—	$	86
Expenses
Property operating expenses	$	—	$	8		$	—	$	67
Depreciation and amortization	—		—			—		42
Interest expense and other	—		—			—		36
Total expense	$	—	$	8		$	—	$	145
Loss from discontinued operations before gain on sale	$	—	$	(8	)	$	—	$	(59	)
Net loss on insurance and other settlement proceeds on discontinued operations	—		3			—		—
Gain on sale of discontinued operations	—		(103		)	—		5,378
(Loss) Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

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13.           Segment Information

As of September 30, 2015, we owned or had an ownership interest in 253 multifamily apartment communities in 15 different states from which we derived all significant sources of earnings and operating cash flows. Senior management evaluates performance and determines resource allocations by reviewing apartment communities individually and in the following reportable operating segments:

• Large market same store communities are generally communities:

◦ in markets with a population of at least 1 million and at least 1% of the total public multifamily REIT units; and

◦ that we have owned and have been stabilized for at least a full 12 months and have not been classified as held for sale.

• Secondary market same store communities are generally communities:

◦ in markets with populations of more than 1 million but less than 1% of the total public multifamily REIT units or in markets with a population of less than 1 million; and

◦ that we have owned and have been stabilized for at least a full 12 months and have not been classified as held for sale.

• Non same store communities and other includes recent acquisitions, communities in development or lease-up, communities that have been identified for disposition, and communities that have undergone a significant casualty loss. Also included in non same store communities are non multifamily activities, which represent less than 1% of our portfolio.

On the first day of each calendar year, we determine the composition of our same store operating segments for that year as well as adjust the previous year, which allows us to evaluate full period-over-period operating comparisons.  Properties in development or lease-up will be added to the same store portfolio on the first day of the calendar year after they have been owned and stabilized for at least a full 12 months. Communities are considered stabilized after achieving 90% occupancy for 90 days. Communities that have been identified for disposition are excluded from our same store portfolio.

We utilize net operating income, or NOI, a non-GAAP financial measure, in evaluating the performance of the segments.  Total NOI represents total property revenues, the most directly comparable GAAP financial measure, less total property operating expenses, excluding depreciation and amortization, for all properties held during the period regardless of their status as held for sale. We believe NOI is a helpful tool in evaluating the operating performance of our segments because it measures the core operations of property performance by excluding corporate level expenses and other items not related to property operating performance.

A redevelopment community is a community with a specific plan in place to upgrade at least half of the community's units over a period of time with new finishes, fixtures, and appliances, among other upgrades.  These plans include spending a pre-defined amount of capital per unit to achieve a rent increase as a result of the upgrades.  We separately identify redevelopment communities that would cause a material distortion of normal same store operating results; however, currently there are no communities separately identified. Routine renovations occur at a property as items need to be replaced as a normal part of operations and is done with an expectation to maintain the current level of quality at the property. There is no specified plan in place for routine renovations.

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Revenues and NOI for each reportable segment for the three- and nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Revenues
Large Market Same Store	$	149,642		$	140,452		$	438,184		$	411,851
Secondary Market Same Store	82,494			78,413			242,908			231,852
Non-Same Store and Other	29,862			30,698			98,349			95,256
Total property revenues	261,998			249,563			779,441			738,959
Management fee income	—			11			—			154
Total operating revenues	$	261,998		$	249,574		$	779,441		$	739,113
NOI
Large Market Same Store	$	91,237		$	84,084		$	266,941		$	247,256
Secondary Market Same Store	50,864			47,365			149,800			141,731
Non-Same Store and Other	18,298			17,232			59,597			54,666
Total NOI	160,399			148,681			476,338			443,653
Discontinued operations NOI included above	—			—			—			(1,102		)
Management fee income	—			11			—			154
Depreciation and amortization	(73,098		)	(70,222		)	(220,606		)	(229,866		)
Acquisition expense	(656		)	(13		)	(2,155		)	(971		)
Property management expense	(7,628		)	(7,429		)	(23,106		)	(24,019		)
General and administrative expense	(5,879		)	(6,511		)	(19,103		)	(16,065		)
Merger related expenses	—			(331		)	—			(3,202		)
Integration costs	—			(147		)	—			(7,140		)
Interest and other non-property (expense) income	(179		)	37			(359		)	1,077
Interest expense	(29,342		)	(28,251		)	(88,801		)	(89,090		)
Loss on debt extinguishment/modification	(5		)	(2,586		)	(3,384		)	(2,586		)
Amortization of deferred financing costs	(887		)	(1,000		)	(2,710		)	(3,485		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621			36,032			190,031			42,254
Net casualty (loss) gain after insurance and other settlement proceeds	(5		)	(126		)	485			(431		)
Income tax expense	(512		)	(442		)	(1,419		)	(1,235		)
Gain on sale of non-depreciable real estate assets	—			—			172			535
(Loss) gain from real estate joint ventures	(1		)	3,124			(5		)	6,019
Discontinued operations	—			(108		)	—			5,319
Net income attributable to noncontrolling interests	(5,094		)	(3,743		)	(16,078		)	(6,364		)
Net income attributable to MAA	$	91,734		$	66,976		$	289,300		$	113,455

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Assets for each reportable segment as of September 30, 2015 and December 31, 2014, were as follows (dollars in thousands):

	September 30, 2015		December 31, 2014
Assets
Large Market Same Store	$	3,803,518	$	1,253,995
Secondary Market Same Store	1,676,365		1,003,426
Non-Same Store and Other	1,266,054		4,509,517
Corporate assets	141,404		66,656
Total assets	$	6,887,341	$	6,833,594

The decrease in the Non-Same Store and Other category, and subsequent increase in both the Large Market Same Store and Secondary Market Same Store categories, are due to the properties acquired as part of the merger with Colonial being moved out of Non-Same Store and into Same Store as the criteria noted above have been met.

14.           Real Estate Acquisitions and Dispositions

The following chart shows our acquisition activity for the nine months ended September 30, 2015:

Communities	Locations	Units (unless noted)	Dates Acquired
River's Walk (4 outparcels)	Charleston, South Carolina	2.5 acres	Q1/Q2 2015 - various
Residences at Burlington Creek	Kansas City, Missouri	298	January 15, 2015
SkySong	Scottsdale, Arizona	325	June 11, 2015
Retreat at West Creek	Richmond, Virginia	254	June 15, 2015
Radius	Newport News, Virginia	252	July 28, 2015
Haven at Prairie Trace	Overland Park, Kansas	280	July 30, 2015

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The following chart shows our disposition activity for the nine months ended September 30, 2015:

Communities	Locations	Units (unless noted)	Dates Sold
Vistas	Macon, Georgia	144	February 26, 2015
Austin Chase	Macon, Georgia	256	February 26, 2015
Fairways at Hartland	Bowling Green, Kentucky	240	February 26, 2015
Fountain Lake	Brunswick, Georgia	113	March 25, 2015
Westbury Creek	Augusta, Georgia	120	April 1, 2015
Woodwinds	Aiken, South Carolina	144	April 1, 2015
Colony at South Park	Aiken, South Carolina	184	April 1, 2015
Bradford Pointe	Augusta, Georgia	192	April 1, 2015
Colonial Promenade Craft Farms	Gulf Shores, Alabama	67,735 sq. ft	April 28, 2015
Colonial Promenade Craft Farms outparcel	Gulf Shores, Alabama	0.23 acres	April 28, 2015
Anatole	Daytona Beach, Florida	208	April 29, 2015
Oaks	Jackson, Tennessee	100	April 29, 2015
Post House Jackson	Jackson, Tennessee	150	April 29, 2015
Woods of Post House	Jackson, Tennessee	122	April 29, 2015
Post House North	Jackson, Tennessee	145	April 29, 2015
Bradford Chase	Jackson, Tennessee	148	April 29, 2015
Sutton Place	Memphis, Tennessee MSA	253	April 29, 2015
Southland Station	Warner Robins, Georgia	304	April 29, 2015
Huntington Chase	Warner Robins, Georgia	200	April 29, 2015
Paddock Park	Ocala, Florida	480	April 29, 2015
Colonial Grand Wilmington	Wilmington, North Carolina	390	July 1, 2015
Savannah Creek	Memphis, Tennessee MSA	204	July 1, 2015
Whisperwood	Columbus, Georgia	1,008	July 1, 2015

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15.           Recent Accounting Pronouncements

The following table provides a brief description of recent accounting pronouncements that could have a material effect on our financial statements:

Standard	Description	Date of Adoption	Effect on the Financial Statements or Other Significant Matters
Accounting Standards Update (ASU) 2015-03 and ASU 2015-15, Interest - Imputation of Interest	ASU 2015-03, requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. ASU 2015-15 provides additional guidance to ASU 2015-03, which did not address presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. ASU 2015-15 noted that the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement.	This ASU is effective for annual periods ending after December 15, 2015; however, early adoption is permitted.	We are currently in the process of evaluating the impact of this ASU, but do not expect the adoption of this ASU to have a material impact on our consolidated financial position or results of operations taken as a whole.
ASU 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern	This ASU requires an entity's management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date that the financial statements are issued. If substantial doubt exists, the entity must disclose the principal conditions or events that raised the substantial doubt, management's evaluation of the significance of these conditions, and management's plan for alleviating the substantial doubt about the entity's ability to continue as a going concern.	This ASU is effective for annual periods ending after December 15, 2016; however, early adoption is permitted.	We are currently in the process of evaluating the impact of this ASU, but do not expect the adoption of this ASU to have a material impact on our consolidated financial position or results of operations taken as a whole.
ASU 2014-09, Revenue from Contracts with Customers	This ASU establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services.	This ASU is effective for annual reporting periods beginning after December 15, 2017, as a result of a deferral of the effective date arising from the issuance of ASU 2015-14, Revenue from Contracts with Customers - Deferral of the Effective Date. Early adoption is permitted.	The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. We are currently in the process of evaluating the impact of adoption of this ASU on our consolidated financial condition and results of operations taken as a whole, but do not expect the impact to be material. We have not yet determined which method will be used for initial application.
ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity	This ASU raises the threshold for disposals to qualify as discontinued operations. It also requires additional disclosures for discontinued operations and new disclosures for individually material disposal transactions that do not meet the definition of a discontinued operation.	This ASU is effective for fiscal years beginning after December 15, 2014, and interim periods within those years; however, early adoption is permitted beginning in the first quarter of 2014.	We adopted this ASU on January 1, 2014. The adoption of this ASU required us to not classify certain disposals occurring during 2014 as discontinued operations.The 2014 dispositions did not qualify for discontinued operations treatment and therefore the gains on these properties are presented as a component of continuing operations for 2014.

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16. Subsequent Events

Financings

On October 1, 2015, we paid off $184.9 million of senior unsecured notes upon maturity.

On October 2, 2015, we entered into a forward swap agreement with a notional value of $50 million related to debt that has not yet been issued.

On October 15, 2015, we closed on a new unsecured revolving credit facility, replacing the current credit facility. The new credit facility provides $750.0 million of borrowing capacity with an option to extend to $1.5 billion at the company's request. The new facility extends the maturity date of the credit facility to April 2020 with one 6-month extension option and bears interest at LIBOR plus a spread based on an investment ratings grid, which is currently 1.00%.

OnOctober 26, 2015, we amended the terms to one of the three existing terms loans; extending the maturity from 2017 to 2021 and reducing the interest rate from LIBOR plus a spread of 1.35% to LIBOR plus a spread of 1.10% based on an investment grade ratings grid.

Acquisition

On October 14, 2015, we purchased 4.4 acres of land at the Retreat at West Creek apartment community for approximately $3.0 million.

Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion analyzes the financial condition and results of operations of both MAA and the Operating Partnership, of which MAA is the sole general partner and in which MAA owned a 94.7% limited partner interest as of September 30, 2015. MAA conducts all of its business through the Operating Partnership and the Operating Partnership’s various subsidiaries.

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes appearing elsewhere in this Report.  Historical results and trends that might appear in the condensed consolidated financial statements should not be interpreted as being indicative of future operations.

Risk Associated with Forward Looking Statements

We consider this and other sections of this Report to contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, with respect to our expectations for future periods. Forward-looking statements do not discuss historical fact, but instead include statements related to expectations, projections, intentions or other items related to the future. Such forward-looking statements include, without limitation, statements concerning property acquisitions and dispositions, joint venture activity, development and renovation activity as well as other capital expenditures, capital raising activities, rent and expense growth, occupancy, financing activities and interest rate and other economic expectations. Words such as "expects," "anticipates," "intends," "plans," "believes," "seeks," "estimates," and variations of such words and similar expressions are intended to identify such forward-looking statements. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from the results of operations, financial conditions or plans expressed or implied by such forward-looking statements. Such factors include, among other things, unanticipated adverse business developments affecting us, or our properties, adverse changes in the real estate markets and general and local economies and business conditions. Although we believe that the assumptions underlying the forward-looking statements contained herein are reasonable, any of the assumptions could be inaccurate, and therefore such forward-looking statements included in this Report may not prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that the results or conditions described in such statements or our objectives and plans will be achieved.

The following factors, among others, could cause our future results to differ materially from those expressed in the forward-looking statements:

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• inability to generate sufficient cash flows due to market conditions, changes in supply and/or demand, competition, uninsured losses, changes in tax and housing laws, or other factors;

• exposure, as a multifamily focused REIT, to risks inherent in investments in a single industry;

• adverse changes in real estate markets, including, but not limited to, the extent of future demand for multifamily units in our significant markets, barriers of entry into new markets, which we may seek to enter in the future, limitations on our ability to increase rental rates, competition, our ability to identify and consummate attractive acquisitions or development projects on favorable terms, our ability to consummate any planned dispositions in a timely manner on acceptable terms, and our ability to reinvest sale proceeds in a manner that generates favorable returns;

• failure of new acquisitions to achieve anticipated results or be efficiently integrated;

• failure of development communities to be completed, if at all, within budget and on a timely basis or to lease-up as anticipated;

• unexpected capital needs;

• changes in operating costs, including real estate taxes, utilities and insurance costs;

• losses from catastrophes in excess of our insurance coverage;

• ability to obtain financing at favorable rates, if at all, and refinance existing debt as it matures;

• level and volatility of interest or capitalization rates or capital market conditions;

• loss of hedge accounting treatment for interest rate swaps or interest rate caps;

• the continuation of the good credit of our interest rate swap and cap providers;

• price volatility, dislocations and liquidity disruptions in the financial markets and the resulting impact on financing;

• the effect of any rating agency actions on the cost and availability of new debt financing;

• significant decline in market value of real estate serving as collateral for mortgage obligations;

• significant change in the mortgage financing market that would cause single-family housing, either as an owned or rental product, to become a more significant competitive product;

• our ability to continue to satisfy complex rules in order to maintain our status as a REIT for federal income tax purposes, the ability of the Operating Partnership to satisfy the rules to maintain its status as a partnership for federal income tax purposes, the ability of our taxable REIT subsidiaries to maintain their status as such for federal income tax purposes, and our ability and the ability of our subsidiaries to operate effectively within the limitations imposed by these rules;

• inability to attract and retain qualified personnel;

• potential liability for breaches of our privacy or information security systems;

• potential liability for environmental contamination;

• adverse legislative or regulatory tax changes;

• litigation and compliance costs associated with laws requiring access for disabled persons; and

• other risks identified in this Report and, from time to time, in other Reports we file with the Securities and Exchange Commission, or the SEC, or in other documents that we publicly disseminate.

We undertake no obligation to publicly update or revise these forward-looking statements to reflect events, circumstances or changes in expectations after the date on which this Report is filed.

Critical Accounting Policies and Estimates

Please refer to our Annual Report on Form 10-K for the year ended December 31, 2014 that we filed with the SEC on February 25, 2015 for discussions of our critical accounting policies. During the three months ended September 30, 2015, there were no material changes to these policies.

Overview of the Three Months Ended September 30, 2015

We experienced an increase in income from continuing operations for the three months ended September 30, 2015 over the three months ended September 30, 2014 as increases in revenues outpaced increases in expenses. The increases in revenues came from a 6.5% increase in our large market same store segment, a 5.2% increase in our secondary market same store segment and a 2.7% decrease in our non-same store and other segment, which was primarily a result of acquisition and disposition activity. The increase in expense came from a 3.6% increase in our large market same store segment and a 1.9% increase in our secondary market same store segment offset by a 14.1% decrease in our non-same store and other segment. Our same store portfolio represents those communities that have been held and have been stabilized for at least 12 months. Communities excluded from the same store portfolio would include recent acquisitions, communities being developed or in lease-up, communities undergoing extensive renovations, and communities identified for disposition. The drivers of these increases are discussed below in the results of operations section.

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The following table shows our multifamily real estate assets as of September 30, 2015 and 2014:

	September 30, 2015	September 30, 2014
Properties	253	265
Units	79,024	81,137
Development Units	806	514
Average Effective Rent/Unit for the three months ended September 30, 2015, excluding lease-up and development	$999	$934
Physical occupancy, excluding lease-up and development	96.6%	96.4%

See discussion of same store average rent per unit and occupancy comparisons in the Trends section below.    

In addition to the multi-family assets detailed above, we also owned or owned an interest in two commercial properties totaling 226,000 square feet of leasable space at September 30, 2015.

Average effective monthly rent per unit is equal to the average of gross rent amounts after the effect of leasing concessions for occupied units plus prevalent market rates asked for unoccupied units, divided by the total number of units. Leasing concessions represent discounts to the current market rate. We believe average effective monthly rent is a helpful measurement in evaluating average pricing. It does not represent actual rental revenue collected per unit.

The following is a discussion of our consolidated financial condition and results of operations for the three- and nine-month periods ended September 30, 2015and2014.This discussion should be read in conjunction with all of the consolidated financial statements included in this Report.

Results of Operations

Comparison of the three months ended September 30, 2015 to the three months ended September 30, 2014

Property Revenues

The following table shows our property revenues by segment for the three months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Three months ended September 30,
	2015		2014		Increase (Decrease)			Percentage Increase (Decrease)
Large Market Same Store	$	149,642	$	140,452	$	9,190		6.5	%
Secondary Market Same Store	82,494		78,413		4,081			5.2	%
Same Store Portfolio	232,136		218,865		13,271			6.1	%
Non-Same Store and Other	29,862		30,698		(836		)	(2.7	)%
Total	$	261,998	$	249,563	$	12,435		5.0	%

The increases in property revenues from our large market same store and secondary market same store groups are primarily a result of increased revenues per occupied unit of 5.1% and increased average physical occupancy of 0.9%.

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Property Operating Expenses

Property operating expenses include costs for property personnel, building repairs and maintenance, real estate taxes and insurance, utilities, landscaping, and depreciation and amortization. The following table shows our property operating expenses by segment for the three months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Three months ended September 30,
	2015		2014		Increase/(Decrease)			Percentage Increase/(Decrease)
Large Market Same Store	$	58,405	$	56,366	$	2,039		3.6	%
Secondary Market Same Store	31,630		31,050		580			1.9	%
Same Store Portfolio	90,035		87,416		2,619			3.0	%
Non-Same Store and Other	11,564		13,466		(1,902		)	(14.1	)%
Total	$	101,599	$	100,882	$	717		0.7	%

The increase in property operating expenses from our large market same store group is primarily a result of increases in real estate taxes of $0.5 million, irrigation expenses of $0.3 million, and cable expenses of $0.2 million. The increase in property operating expenses from our secondary market same store group is primarily a result of increases in leasing personnel expenses of $0.1 million and cable expenses of $0.1 million.

Depreciation and Amortization

The following table shows our depreciation and amortization expense by segment for the three months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Three months ended September 30,
	2015		2014		Increase		Percentage Increase
Large Market Same Store	$	42,496	$	40,597	$	1,899	4.7	%
Secondary Market Same Store	21,413		20,456		957		4.7	%
Same Store Portfolio	63,909		61,053		2,856		4.7	%
Non-Same Store and Other	9,189		9,169		20		0.2	%
Total	$	73,098	$	70,222	$	2,876	4.1	%

The increases in depreciation and amortization expense from our large market same store and secondary market same store groups are primarily due to asset additions made in the normal course of business.     

Debt Extinguishment

Loss on debt extinguishment for the three months ended September 30, 2014 was approximately $2.6 million. We did not incur a material gain or loss on debt extinguishment during the three months ended September 30, 2015.

Dispositions of Depreciable Real Estate Assets Excluded from Discontinued Operations

We recorded a gain on sale of depreciable real estate assets excluded from discontinued operations of $54.6 million for the three months ended September 30, 2015, an increase of $18.6 million from the three months ended September 30, 2014. The increase in the gain was primarily caused by selling a property owned for 18 years for a gain of approximately $40.4 million during the three months ended September 30, 2015. The gains recorded during the three months ended September 30, 2014 were smaller on average due to the period of ownership being shorter.

Gain from Real Estate Joint Ventures

We recorded a gain from real estate joint ventures of $3.1 million during the three months ended September 30, 2014 as opposed to no material gain or loss being recorded during the three months ended September 30, 2015. The decrease was primarily a result of recording a $2.8 million gain for the promote fee received from our Mid-America Fund II, or Fund II,

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partner during the three months ended September 30, 2014. The promote fee was received as a result of MAA achieving certain performance metrics in its management of the Fund II properties over the life of the joint venture. There was no such gain recorded during the three months ended September 30, 2015.

Net Income Attributable to Noncontrolling Interests

Net income attributable to noncontrolling interests for the three months ended September 30, 2015 was approximately $5.1 million, an increase of $1.4 million from the three months ended September 30, 2014. This increase is primarily due to the increase in consolidated net income, which resulted from the factors listed above.

Net Income Attributable to MAA

Primarily as a result of the foregoing, net income attributable to MAA increased by approximately $24.8 million for the three months ended September 30, 2015 from the three months ended September 30, 2014.

Comparison of the nine months ended September 30, 2015 to the nine months ended September 30, 2014

Property Revenues

The following table shows our property revenues by segment for the nine months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Nine months ended September 30,
	2015		2014		Increase		Percentage Increase
Large Market Same Store	$	438,184	$	411,851	$	26,333	6.4	%
Secondary Market Same Store	242,908		231,852		11,056		4.8	%
Same Store Portfolio	681,092		643,703		37,389		5.8	%
Non-Same Store and Other	98,349		95,256		3,093		3.2	%
Total	$	779,441	$	738,959	$	40,482	5.5	%

The increases in property revenues from our large market same store and secondary market same store groups are primarily a result of increased revenues per occupied unit of 4.9% and increased average physical occupancy of 0.8%.

Property Operating Expenses

Property operating expenses include costs for property personnel, building repairs and maintenance, real estate taxes and insurance, utilities, landscaping, and depreciation and amortization. The following table shows our property operating expenses by segment for the nine months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Nine months ended September 30,
	2015		2014		Increase/(Decrease)			Percentage Increase/(Decrease)
Large Market Same Store	$	171,243	$	164,595	$	6,648		4.0	%
Secondary Market Same Store	93,108		90,121		2,987			3.3	%
Same Store Portfolio	264,351		254,716		9,635			3.8	%
Non-Same Store and Other	38,752		41,692		(2,940		)	(7.1	)%
Total	$	303,103	$	296,408	$	6,695		2.3	%

The increases in property operating expenses from our large market same store and secondary market same store groups are primarily a result of increases in real estate taxes of $3.1 million, office and maintenance personnel expenses of $2.4 million, and water and cable utilities of $1.4 million.

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Depreciation and Amortization

The following table shows our depreciation and amortization expense by segment for the nine months ended September 30, 2015 and September 30, 2014 (dollars in thousands):

	Nine months ended September 30,
	2015		2014		(Decrease)/Increase			Percentage (Decrease)/Increase
Large Market Same Store	$	125,794	$	133,915	$	(8,121	)	(6.1	)%
Secondary Market Same Store	63,314		65,361		(2,047		)	(3.1	)%
Same Store Portfolio	189,108		199,276		(10,168		)	(5.1	)%
Non-Same Store and Other	31,498		30,590		908			3.0	%
Total	$	220,606	$	229,866	$	(9,260	)	(4.0	)%

The decreases in depreciation and amortization expense from our large market and secondary market same store groups are primarily due to the decrease in the amortization of the fair value of in-place leases and resident relationships acquired as a result of the merger with Colonial of $19.3 million from the nine months ended September 30, 2014 to the nine months ended September 30, 2015. This decrease was offset by an increase in depreciation expense of $9.6 million from the nine months ended September 30, 2014 to the nine months ended September 30, 2015.    

General and Administrative Expenses

General and Administrative expenses for the nine months ended September 30, 2015 were approximately $19.1 million, an increase of $3.0 million from the nine months ended September 30, 2014. The majority of the increase was related to an increase in legal expenses of $2.2 million.

Merger and Integration Related Expenses

Merger related expenses, primarily severance, legal, and professional costs for the acquisition of Colonial were approximately $3.2 million for the nine months ended September 30, 2014. We also incurred integration related expenses, primarily related to temporary systems, staffing, and facilities costs of $7.1 million for the nine months ended September 30, 2014. We did not incur any merger or integration related expenses for the nine months ended September 30, 2015.

Dispositions of Depreciable Real Estate Assets Excluded from Discontinued Operations

We recorded a gain on sale of depreciable real estate assets excluded from discontinued operations of $190.0 million for the nine months ended September 30, 2015, an increase of $147.8 million from the nine months ended September 30, 2014. The increase in the gain is caused by selling 22 properties during the nine months ended September 30, 2015 versus only selling nine properties during the nine months ended September 30, 2014.

Gain from Real Estate Joint Ventures

We recorded a gain from real estate joint ventures of $6.0 million during the nine months ended September 30, 2014 as opposed to no material gain or loss being recorded during the nine months ended September 30, 2015. The decrease was primarily a result of recording a $3.4 million gain for the disposition of Ansley Village by Fund II as well as a $2.8 million gain for the promote fee received from our Fund II partner during the nine months ended September 30, 2014. The promote fee was received as a result of MAA achieving certain performance metrics in its management of the Fund II properties over the life of the joint venture. There was no such gains recorded during the nine months ended September 30, 2015.

Discontinued Operations

We recorded a gain on sale of discontinued operations of $5.4 million during the nine months endedSeptember 30, 2014. We did not record a gain or loss on sale of discontinued operations during the nine months ended September 30, 2015 due to the adoption of ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which resulted in dispositions being included in the gain on sale of depreciable real estate assets excluded from discontinued operations. See Note 15 to the Condensed Consolidated Financial Statements.

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Net Income Attributable to Noncontrolling Interests

Net income attributable to noncontrolling interests for the nine months ended September 30, 2015 was approximately $16.1 million, an increase of $9.7 million from the nine months ended September 30, 2014. This increase is primarily due to the increase in consolidated net income, which resulted from the factors listed above.

Net Income Attributable to MAA

Primarily as a result of the foregoing, net income attributable to MAA increased by approximately $175.8 million for the nine months ended September 30, 2015 from the nine months ended September 30, 2014.

Funds from Operations

Funds from operations, or FFO, represents net income available for common shareholders (computed in accordance with GAAP) excluding extraordinary items, asset impairment, gains or losses on disposition of depreciable real estate assets, plus net income attributable to noncontrolling interest, depreciation and amortization of real estate, and adjustments for joint ventures to reflect FFO on the same basis. Disposition of real estate assets includes sales of discontinued operations. Because noncontrolling interest is added back, FFO, when used in this document, represents FFO attributable to the Company.

FFO is a non-GAAP financial measure. FFO should not be considered as an alternative to net income or any other GAAP measurement of performance, as an indicator of operating performance or as an alternative to cash flow from operating, investing, and financing activities as a measure of liquidity. We believe that FFO is helpful to investors in understanding our operating performance because its calculation excludes depreciation and amortization expense on real estate assets. We believe that GAAP historical cost depreciation of real estate assets is generally not correlated with changes in the value of those assets, whose value does not diminish predictably over time, as historical cost depreciation implies. Our calculation of FFO may differ from the methodology for calculating FFO utilized by other REITs and, accordingly, may not be comparable to such other REITs.

Core FFO, a non-GAAP financial measure, represents FFO excluding certain non-cash or non-routine items such as acquisition, merger and integration expenses, mark-to-market debt adjustments and loss or gain on debt extinguishment. While our definition of Core FFO is similar to others in our industry, our precise methodology for calculating Core FFO may differ from that utilized by other REITs and, accordingly, may not be comparable to such other REITs. Core FFO should not be considered as an alternative to net income. We believe that Core FFO is helpful in understanding our operating performance in that it removes certain items that by their nature are not comparable over periods and therefore tend to obscure actual operating performance.

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The following table is a reconciliation of Core FFO and FFO to net income available for MAA common shareholders for the three and nine months ended September 30, 2015 and September 30, 2014 (dollars in thousands): 

	Three months ended September 30,							Nine months ended September 30,
	2015			2014				2015			2014
Net income available for MAA common shareholders	$	91,734		$	66,976			$	289,300		$	113,455
Depreciation and amortization of real estate assets	72,335			69,613				218,451			228,106
Depreciation and amortization of real estate assets of discontinued operations	—			—				—			42
Gain on sales of discontinued operations	—			103				—			(5,378		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	(54,621		)	(36,032		)		(190,031		)	(42,254		)
Gain on disposition within unconsolidated entities	—			(603		)		(12		)	(4,017		)
Depreciation and amortization of real estate assets of real estate joint ventures	6			37				19			391
Net income attributable to noncontrolling interests	5,094			3,743				16,078			6,364
Funds from operations attributable to the Company	114,548			103,837				333,805			296,709
Acquisition expense	656			13				2,155			971
Merger related expenses	—			331				—			3,202
Integration related expenses	—			147				—			7,140
(Gain) loss on sale of non-depreciable real estate assets	—			—				(172		)	(535		)
Mark-to-market debt adjustment	(5,321		)	(5,328		)		(16,053		)	(19,568		)
Loss on debt extinguishment	5			2,586			(1)	3,384			3,126			(1)
Core funds from operations attributable to the Company	$	109,888		$	101,586			$	323,119		$	291,045

⁽¹⁾ The loss on debt extinguishment for 2014 includes MAA's share of debt extinguishment costs incurred by Fund II.

FFO and Core FFO for the three months ended September 30, 2015 increased approximately $10.7 million and $8.3 million, respectively, from the three months ended September 30, 2014 primarily as a result of the increase in total property revenues of approximately $12.4 million discussed above that was only partially offset by the $0.7 million increase in property operating expenses.    

FFO and Core FFO for the nine months ended September 30, 2015 increased approximately $37.1 million and $32.1 million, respectively, from the nine months ended September 30, 2014 primarily as a result of the increase in total property revenues of approximately $40.5 million discussed above that was only partially offset by the $6.7 million increase in property operating expenses.

Trends

During the three months ended September 30, 2015, demand for apartments continued to be strong. This strength was evident on two fronts: same store average physical occupancy during the three months ended September 30, 2015 increased, averaging 96.6% occupancy for the quarter as compared to 95.7% for the three months ended September 30, 2014; and same store effective rent per unit also increased, up 4.6% in the three months ended September 30, 2015 as compared to the three months ended September 30, 2014. The average physical occupancy for the quarter of 96.6% was a record high for the company.

An important part of our portfolio strategy is to maintain a diversity of markets across the Southeast and Southwest regions of the United States. The diversity of markets tends to mitigate exposure to economic issues in any one geographic market or area. We believe that a well-diversified portfolio, including both large and select secondary markets, will perform well in “up” cycles as well as weather “down” cycles better. As of September 30, 2015, we were invested in approximately 42 defined Metropolitan Statistical Areas across 15 states, with approximately 65% of our multifamily assets, based on gross assets, in large markets and 35% of our multifamily assets in select secondary markets, which is in line with our strategy.

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New supply of rental units has increased in several key markets, and multifamily permitting increased in 2014 and continues to remain elevated in 2015. We believe this permitting will ultimately lead to a further increase in supply but also believe the lack of new apartments in recent years combined with strong demand from new households will help keep supply and demand in balance. Competition from single family homes, both for rent and for sale, continues to be comparable to prior periods and has not materially increased or caused higher resident turnover in our portfolio. Long term, we expect demographic trends (including the growth of prime age groups for rentals and immigration and population movement to the Southeast and Southwest) will continue to build apartment rental demand in our markets.

Our focus is on maintaining strong physical occupancy while increasing pricing through our revenue management system. Same store physical occupancy remained strong during the quarter and ended the quarter at 96.7%. As we move into the fall and winter leasing season, this level of physical occupancy should allow us to maximize pricing while at the same time protecting occupancy in the fourth quarter of 2015, typically a slower leasing period.

We continue to develop improved products, operating systems and procedures that we believe enable us to capture more revenue. The continued benefit of ancillary services (such as our cable saver and deposit saver programs), improved collections and utility reimbursements enable us to capture increased revenue. We also actively work on improving processes and products to reduce expenses, such as new websites and internet access for our residents that enable them to transact their business with us more simply and effectively.

Liquidity and Capital Resources

Our cash flows from operating, investing and financing activities, as well as general economic and market conditions, are the principal factors affecting our liquidity and capital resources. The significant changes in cash due to operating, investing, and financing activities from the nine months ended September 30, 2014 to the nine months ended September 30, 2015 are as follows:

Operating Activities

Net cash flow provided by operating activities increased to $361.5 million for the nine months ended September 30, 2015 from $297.3 million for the nine months ended September 30, 2014. This change was a result of various items, including higher revenue as discussed above.

Investing Activities

Net cash used in investing activities during the nine months ended September 30, 2015 was $75.9 million compared to net cash used in investing activities during the nine months ended September 30, 2014 of $55.1 million. The primary drivers of this change are as follows:

	Cash inflow/(outflow) during the nine months ended September 30,
	2015			2014			Increase/(Decrease) in Net Cash			Percentage Increase/(Decrease) in Net Cash
Proceeds from disposition of real estate assets	$	358,017		$	241,691		$	116,326		48.1	%
Purchases of real estate and other assets	$	(248,668	)	$	(155,679	)	$	(92,989	)	(59.7	)%
Funding of escrow for future acquisitions	$	(59,607	)	$	(5,589	)	$	(54,018	)	(966.5	)%
Development	$	(24,870	)	$	(57,705	)	$	32,835		56.9	%
Distributions from real estate joint ventures	$	6		$	15,964		$	(15,958	)	(100.0	)%

The increase in proceeds from the disposition of real estate assets resulted from the sale of 21 apartment communities and one commercial property during the nine months ended September 30, 2015 compared to the sale of seven apartment communities, two commercial properties, and five land parcels during the nine months ended September 30, 2014. The increase in cash outflows from purchases of real estate and other assets resulted from the acquisition of five apartment communities and four land parcels during the nine months ended September 30, 2015 compared to the acquisition of five apartment communities during the nine months ended September 30, 2014. Additionally, the apartment communities acquired

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during the nine months ended September 30, 2014 included debt assumptions, which reduced the amount of cash paid for these properties. The increase in cash outflows from funding of escrow for future acquisitions resulted from the funding of two 1031(b) transactions during the nine months ended September 30, 2015 compared to the funding of three 1031(b) transactions and the return of escrow related to two 1031(b) transactions during the nine months ended September 30, 2014. The decrease in cash outflows for development resulted from the timing of development spending for two projects commencing during the nine months ended September 30, 2015. The decrease in distributions from real estate joint ventures primarily resulted from the receipt of funds from the sale of two joint venture properties during the nine months ended September 30, 2014. No joint venture properties were sold during the nine months ended September 30, 2015.

Financing Activities

Net cash used in financing activities increased to $267.4 million for the nine months ended September 30, 2015 from $243.3 million for the nine months ended September 30, 2014. The primary drivers of this change are as follows:

	Cash inflow/(outflow) during the nine months ended September 30,
	2015			2014			(Decrease)/Increase in Net Cash			Percentage (Decrease)/Increase in Net Cash
Proceeds from notes payable	$	—		$	396,532		$	(396,532	)	(100.0	)%
Net change in credit lines	$	8,885		$	(216,184	)	$	225,069		104.1	%
Principal payments on notes payable	$	(92,211	)	$	(258,105	)	$	165,894		64.3	%
Exercise of stock options	$	420		$	11,916		$	(11,496	)	(96.5	)%
Dividends paid on common shares	$	(174,036	)	$	(164,298	)	$	(9,738	)	(5.9	)%

The decrease in cash inflows related to the proceeds from notes payable primarily resulted from issuing $400.0 million in senior unsecured notes during the nine months ended September 30, 2014. No debt was issued during the nine months ended September 30, 2015. The decrease in cash outflows from the net change in credit lines resulted from the borrowing of $125.0 million on our KeyBank unsecured credit facility and the repayment of $116.1 million on our Fannie Mae secured credit facility during thenine months ended September 30, 2015 compared to the repayment of $198.2 million on our Freddie Mac secured credit facility and $17.9 million on our Fannie Mae secured tax free facility during the nine months ended September 30, 2014. The decrease in cash outflows from principal payments on notes payable primarily resulted from paying off approximately $85.9 million of secured property mortgages during the nine months ended September 30, 2015 compared to paying off approximately $192.2 million of senior unsecured notes and approximately $61.2 million of secured property mortgages during the nine months ended September 30, 2014. The decrease in cash inflows from the exercise of stock options resulted from the exercise of approximately 7,000 stock options during the nine months ended September 30, 2015 compared to the exercise of approximately 263,000 stock options during the nine months ended September 30, 2014. The increase in cash outflows from dividends paid on common shares primarily resulted from the increase in the dividend rate to $0.77 per share during thenine months ended September 30, 2015 from $0.73 per share during the nine months ended September 30, 2014.

Net cash provided by operating activities (computed in accordance with GAAP) was in excess of our funding of normal capital improvements to existing real estate assets, distributions to unitholders and dividends paid on common and preferred shares for both the nine months ended September 30, 2015 and 2014. While we had sufficient liquidity to permit dividend distributions at current rates through additional borrowings, if necessary, any significant deterioration in operations could result in our financial resources being insufficient to pay distributions to shareholders at the current rate, in which event we would be required to reduce the dividend distribution rate.

We believe that we have adequate resources to fund our current operations, annual refurbishment of our properties, and incremental investment in new properties. To the extent additional capital resources are required or deemed desirable, we may issue, from time to time equity or debt securities.

Equity

As of September 30, 2015, we owned 75,379,381 OP Units, comprising a 94.7% limited partnership interest in the Operating Partnership, while the remaining 4,185,065 outstanding OP Units were held by limited partners of the Operating Partnership. Holders of OP Units (other than us and our affiliates) may require us to redeem their OP Units from time to time, in which case we may, at our option, pay the redemption price either in cash (in an amount per OP Unit equal, in general, to the

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average closing price of our common stock on the New York Stock Exchange over a specified period prior to the redemption date) or by delivering one share of our common stock (subject to adjustment under specified circumstances) for each OP Unit so redeemed. In addition, we have registered the 4,185,065 shares of our common stock, which as of September 30, 2015, were issuable upon redemption of OP Units held by the Operating Partnership's limited partners under the Securities Act of 1933, as amended, so that those shares can be sold freely in the public markets. To the extent that additional OP Units are issued to limited partners of the Operating Partnership, we will likely register the additional shares of common stock issuable upon redemption of those OP Units under the Securities Act of 1933, as amended, so that those shares can also be sold in the public markets. If we issue shares of our common stock upon the redemption of OP Units in our Operating Partnership, sales of substantial amounts of such shares of our common stock, or the perception that these sales could occur, may adversely affect prevailing market prices for our common stock or may impair our ability to raise capital through the sale of our common stock or other equity securities.

For more information regarding our equity capital resources, see Note 9 and Note 10 to the Condensed Consolidated Financial Statements.

Debt

The following schedule outlines our variable versus fixed rate debt, including the impact of interest rate swaps and caps, outstanding as of September 30, 2015 (dollars in thousands):

	Principal Balance		Average Years to Rate Maturity	Effective Rate
SECURED DEBT
Fixed Rate or Swapped	$	1,102,868	3.7	4.0	%
Variable Rate - Capped(1)	125,000		1.4	0.8	%
Total Fixed or Hedged Rate Maturity	$	1,227,868	3.4	3.6	%
Variable Rate	145,786		0.1	0.8	%
Total Secured Rate Maturity	$	1,373,654	3.1	3.3	%
UNSECURED DEBT
Fixed Rate or Swapped	$	1,867,481	4.7	4.0	%
Variable Rate	184,000		0.1	1.3	%
Total Unsecured Rate Maturity	$	2,051,481	4.3	3.8	%
TOTAL DEBT RATE MATURITY	$	3,425,135	3.8	3.6	%
TOTAL FIXED OR HEDGED DEBT RATE MATURITY	$	3,095,349	4.2	3.9	%

(1) The effective rate represents the average rate on the underlying variable debt unless the cap rates are reached, which average 4.6% of LIBOR for conventional caps.

As of September 30, 2015, we had entered into interest rate swaps totaling a notional amount of $550.0 million related to issued debt. Additionally, we have entered into three forward rate swaps totaling a notional amount of $150 million where the debt has not yet been issued. To date, these swaps have proven to be highly effective hedges. We had also entered into interest rate cap agreements totaling a notional amount of approximately $125.0 million as of September 30, 2015.

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The following schedule outlines the contractual maturity dates of our outstanding debt as of September 30, 2015 (dollars in thousands):

	Amount Borrowed
	Credit Facilities
	Fannie Mae Secured		KeyBank Unsecured		Other Secured		Other Unsecured		Total
2015	$	80,785	$	—	$	—	$	184,932	$	265,717
2016	80,000		—		34,354		78,911		193,265
2017	80,000		184,000		61,544		168,039		493,583
2018	80,000		—		92,426		300,188		472,614
2019	—		—		551,615		20,000		571,615
Thereafter	—		—		312,930		1,115,411		$	1,428,341
Total	$	320,785	$	184,000	$	1,052,869	$	1,867,481	$	3,425,135

The following schedule outlines the interest rate maturities of our outstanding fixed or hedged debt as of September 30, 2015 (dollars in thousands):

	Fixed Rate Debt		Interest Rate Swaps		Total Fixed Rate Balances		Contract Rate		Interest Rate Caps		Total Fixed or Hedged
2015	$	184,932	$	—	$	184,932	5.5	%	$	—	$	184,932
2016	109,600		—		109,600		5.9	%	75,000		184,600
2017	129,544		300,000		429,544		3.0	%	25,000		454,544
2018	142,426		250,000		392,426		3.6	%	25,000		417,426
2019	571,615		—		571,615		5.7	%	—		571,615
Thereafter	1,282,232		—		1,282,232		4.4	%	—		1,282,232
Total	$	2,420,349	$	550,000	$	2,970,349	4.5	%	$	125,000	$	3,095,349

Unsecured Credit Facilities

On August 7, 2013, our Operating Partnership entered into a $500.0 million unsecured revolving credit facility agreement with KeyBank National Association and thirteen other banks. This credit facility replaces our Operating Partnership's previous unsecured credit facility with KeyBank. Interest is paid using an investment grade pricing grid using LIBOR plus a spread of 0.90% to 1.70%. As of September 30, 2015, we had $184.0 million borrowed under this facility. This facility serves as our primary source of short term liquidity and has an accordion feature to expand its capacity to $800.0 million.

Unsecured Term Loans

In addition to our unsecured credit facility, we maintain three term loans. We had total borrowings of $550.0 million outstanding under these term loan agreements at September 30, 2015.     

The $250.0 million Wells Fargo term loan bore interest at a rate of LIBOR plus a spread of 1.65% to 2.90% based on the credit ratings of our unsecured debt from time to time. The loan matures on August 1, 2018. On July 25, 2014, we repriced the Wells Fargo term loan, and it now bears interest at a rate of LIBOR plus a spread of 0.90% to 1.90% based on the credit ratings of our unsecured debt from time to time. The maturity date was not changed. As of September 30, 2015, this loan was bearing interest at a rate of LIBOR plus 1.15%.

The $150.0 million U.S. Bank National Association term loan bore interest at a rate of LIBOR plus a spread of 1.10% to 2.05% based on the credit ratings of our unsecured debt from time to time and was set to mature on May 11, 2017. On October 1, 2014, we repriced the US Bank term loan, and it now bears interest at a rate of LIBOR plus a spread of 0.90% to

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1.90% based on the credit ratings of our unsecured debt from time to time. The maturity was extended to March 1, 2020. As of September 30, 2015, this loan was bearing interest at a rate of LIBOR plus 1.15%.

The $150.0 million term loan agreement with KeyBank and J.P. Morgan bore interest at a rate of LIBOR plus a spread of 1.10% to 2.05% and matures on March 1, 2017. As of September 30, 2015, this loan was bearing interest at a rate of LIBOR plus 1.35%.

Senior Unsecured Notes

We have also issued both public and private unsecured senior notes. As of September 30, 2015, we have approximately $1.0 billion of publicly issued bonds and $310.0 million of private placement notes. These senior unsecured notes are longer term in nature and usually mature within five to 12 years.

Secured Credit Facilities

We rely on the efficient operation of the financial markets to refinance debt maturities, and on rate renewals for Fannie Mae. Fannie Mae provided credit enhancement for approximately $320.8 million of our outstanding debt through our Fannie Mae Facility, as defined below, as of September 30, 2015.

The interest rate markets for Fannie Mae Discount Mortgage Backed Securities, or DMBS, which in our experience are highly liquid and highly correlated with three-month LIBOR interest rates, are also an important component of our liquidity and interest rate swap effectiveness. Prudential Mortgage Capital, a Delegated Underwriting and Servicing, or DUS, lender for Fannie Mae, markets 90-day Fannie Mae DMBS monthly, and is obligated to advance funds to us at DMBS rates plus a credit spread under the terms of the credit agreements between Prudential and us.

Approximately 9.4% of our outstanding obligations at September 30, 2015 were borrowed through a credit facility credit enhanced by Fannie Mae, also referred to as the Fannie Mae Facility. The Fannie Mae Facility has a combined line limit of $360.0 million, of which $320.8 million was collateralized and available to borrow at September 30, 2015. We had total borrowings outstanding under the Fannie Mae Facility of approximately $320.8 million at September 30, 2015. Various Fannie Mae rate tranches of the Fannie Mae Facility mature from 2015 through 2018. The Fannie Mae Facility provides for both fixed and variable rate borrowings. The interest rate on the majority of the variable portion is based on the Fannie Mae DMBS rate which are credit-enhanced by Fannie Mae and are typically sold every 90 days by Prudential Mortgage Capital at interest rates approximating three-month LIBOR less a spread that has averaged 0.17% over the life of the Fannie Mae Facility, plus a credit enhancement fee of 0.49% to 0.67%. We have seen more volatility in the spread between the DMBS and three-month LIBOR since late 2007 than was historically prevalent.

Secured Property Mortgages

We also maintain secured property mortgages with Fannie Mae, Freddie Mac, and various life insurance companies. These mortgages are usually fixed rate and can range from five to 10 years in maturity. As of September 30, 2015, we have $1.1 billion of secured property mortgages.

For more information regarding our debt capital resources, see Note 6 to the Condensed Consolidated Financial Statements.

49

The following table reflects our total contractual cash obligations which consist of our long-term debt, development fees and operating leases as of September 30, 2015 (dollars in thousands):

Contractual Obligations (1)	2015		2016		2017		2018		2019		Thereafter		Total
Long-Term Debt Obligations (2)	$	452,257	$	202,685	$	317,966	$	426,509	$	559,885	$	1,465,833	$	3,425,135
Fixed Rate or
Swapped Interest (3)	42,299		114,745		103,235		93,799		65,527		167,732		587,337
Purchase Obligations (4)	161		1,125		—		—		—		—		1,286
Operating Lease Obligations	13		51		47		32		5		4		152
Total	$	494,730	$	318,606	$	421,248	$	520,340	$	625,417	$	1,633,569	$	4,013,910

(1) Fixed rate and swapped interest are shown in this table. The average interest rates of variable rate debt are shown in preceding tables.

(2) Represents principal payments.

(3) Swapped interest is subject to the ineffective portion of cash flow hedges as described in Note 7 to the Condensed Consolidated Financial Statements. 

(4) Represents development fees.

Off-Balance Sheet Arrangements

At September 30, 2015, and 2014, we did not have any relationships, including those with unconsolidated entities or financial partnerships, for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources that are material to investors.

In addition, we do not engage in trading activities involving non-exchange traded contracts. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such relationships. We do not have any relationships or transactions with persons or entities that derive benefits from their non-independent relationships with us or our related parties other than those disclosed in Note 14 to the Condensed Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2014 filed with the SEC on February 25, 2015.

Our investments in our real estate joint ventures are unconsolidated and are recorded using the equity method for the joint ventures in which we do not have a controlling interest.

Insurance

We renegotiated our insurance programs effective July 1, 2015. We believe that our current property and casualty insurance program provides appropriate insurance coverage for financial protection against insurable risks such that any insurable loss experienced that can be reasonably anticipated would not have a significant impact on our liquidity, financial position or results of operation.

Inflation

Our resident leases at the apartment communities allow, at the time of renewal, for adjustments in the rent payable thereunder, and thus may enable us to seek rent increases. Almost all residential leases are for one year or less. The short-term nature of these leases generally serves to reduce our risk to adverse effects of inflation.

Impact of Recently Issued Accounting Standards

Note 15 to the Condensed Consolidated Financial Statements provides a brief description of recent accounting pronouncements that could have a material effect on our financial statements.

50

Item 3.    Quantitative and Qualitative Disclosures About Market Risk.

We are exposed to interest rate changes associated with our credit facilities and other variable rate debt as well as refinancing risk on our fixed rate debt. Our involvement with derivative financial instruments is limited to managing our exposure to changes in interest rates and we do not expect to use them for trading or other speculative purposes.

There have been no material changes in our market risk as disclosed in the Annual Report on Form 10-K for the year ended December 31, 2014 filed with the SEC on February 25, 2015.

Item 4.   Controls and Procedures.

Management’s Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive and financial officers, has evaluated the effectiveness of our disclosure controls and procedures in ensuring that the information required to be disclosed in our filings under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, including ensuring that such information is accumulated and communicated to our management as appropriate to allow timely decisions regarding required disclosure. Based on such evaluation, our principal executive and financial officers have concluded that such disclosure controls and procedures were effective as of September 30, 2015 (the end of the period covered by this Report).

Changes in Internal Controls

During the quarter ended September 30, 2015, there were no changes in our internal control over financial reporting that materially affected, or that are reasonably likely to materially affect, our internal control over financial reporting.

51

PART II – OTHER INFORMATION

Item 1.      Legal Proceedings.

We, along with multiple other parties, are named defendants in lawsuits arising out of alleged construction deficiencies with respect to condominium units at Regatta at James Island in Charleston, South Carolina. The Regatta at James Island property was developed by certain of our subsidiaries prior to MAA's merger with Colonial and constructed by Colonial Construction Services, LLC. The condominiums were constructed in 2006 and all 212 units were sold. The lawsuits, one filed on behalf of the condominium homeowners association and one filed by three of the unit owners (purportedly on behalf of all unit owners), were filed in South Carolina state court (Charleston County) in August 2012, against various parties involved in the development and construction of the Regatta at James Island property, including the contractors, subcontractors, architect, developer, and product manufacturers. The plaintiffs are seeking damages resulting primarily from alleged construction deficiencies, but the amount plaintiffs seek to recover has not been disclosed. The lawsuits are currently in discovery. We are continuing to investigate the matter and evaluate our options and intend to vigorously defend ourself against these claims. No assurance can be given that the matter will be resolved favorably to us. We have included in our loss contingency an estimate of probable loss in connection with this matter, but currently cannot reasonably estimate any further possible loss, or any range of reasonably possible loss, in connection with this matter.

In addition, we are subject to various other legal proceedings and claims that arise in the ordinary course of our business operations. Matters which arise out of allegations of bodily injury, property damage, and employment practices are generally covered by insurance. While the resolution of these other matters cannot be predicted with certainty, we currently believe the final outcome of such matters will not have a material adverse effect on our financial position, results of operations or cash flows.

For more information regarding our legal proceedings, see Note 11 to the Condensed Consolidated Financial Statements.

Item 1A.   Risk Factors.

There have been no material changes to the risk factors that were discussed in Part I, Item 1A of the Company's and the Operating Partnership's Annual Report on Form 10-K for the year ended December 31, 2014 filed with the SEC on February 25, 2015.

Item 2.   Unregistered Sales of Equity Securities and Use of Proceeds.

The following chart shows our repurchases of shares for the three-month period ended September 30, 2015:

MAA Purchases of Equity Securities

Period	Total Number of Shares (or Units) Purchased	Average Price Paid per Share (or Unit)		Total Number of Shares (or Units)Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Shares (or Units)That May Yet be Purchased Under the Plans or Programs (1)
July 1, 2015 - July 31, 2015	—	$	—	—	2,138,000
August 1, 2015 - August 31, 2015	—	$	—	—	2,138,000
September 1, 2015 - September 30, 2015	—	$	—	—	2,138,000
Total	—	$	—	—	2,138,000

(1) This number reflects the amount of shares of MAA's common stock that were available for purchase under our 4,000,000 share repurchase program authorized by our Board of Directors in 1999.

52

Item 3.  Defaults Upon Senior Securities.

Not Applicable.

Item 4.  Mine Safety Disclosures.

Not applicable.

Item 5.  Other Information.

Not Applicable.

Item 6.         Exhibits.

(a) The following exhibits are filed as part of this Report.

Exhibit Number	Exhibit Description
12.1	Consolidated Ratio of Earnings to Fixed charges for MAA
12.2	Consolidated Ratio of Earnings to Fixed charges for MAALP
31.1	Certification of Chief Executive Officer of MAA Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer of MAA Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.3	Certification of Chief Executive Officer of MAA, in its capacity as general partner of MAALP, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.4	Certification of Chief Financial Officer of MAA, in its capacity as general partner of MAALP, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer of MAA Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer of MAA Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.3	Certification of Chief Executive Officer of MAA, in its capacity as general partner of MAALP, Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.4	Certification of Chief Financial Officer of MAA, in its capacity as general partner of MAALP, Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	The following financial information from Mid-America Apartment Communities, Inc.’s (MAA) and Mid-America Apartments, L.P.'s (MAALP) Report for the period ended September 30, 2015, filed with the SEC on October 30, 2015, formatted in Extensible Business Reporting Language (XBRL): (i) the Condensed Consolidated Balance Sheets as of September 30, 2015 (Unaudited) and December 31, 2014 (Unaudited); (ii) the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); (iii) the Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); (iv) the Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); and (v) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text (Unaudited).

53

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.

		MID-AMERICA APARTMENT COMMUNITIES, INC.
Date:	October 30, 2015	/s/Albert M. Campbell, III
		Albert M. Campbell, III
		Executive Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)

54

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.

		MID-AMERICA APARTMENTS, L.P.
	By:	Mid-America Apartment Communities, Inc., its general partner
Date:	October 30, 2015	/s/Albert M. Campbell, III
		Albert M. Campbell, III
		Executive Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)

55

EXHIBIT INDEX

Exhibit Number	Exhibit Description
12.1	Consolidated Ratio of Earnings to Fixed charges for MAA
12.2	Consolidated Ratio of Earnings to Fixed charges for MAALP
31.1	Certification of Chief Executive Officer of MAA Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer of MAA Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.3	Certification of Chief Executive Officer of MAA, in its capacity as general partner of MAALP, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.4	Certification of Chief Financial Officer of MAA, in its capacity as general partner of MAALP, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer of MAA Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer of MAA Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.3	Certification of Chief Executive Officer of MAA, in its capacity as general partner of MAALP, Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.4	Certification of Chief Financial Officer of MAA, in its capacity as general partner of MAALP, Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	The following financial information from Mid-America Apartment Communities, Inc.’s (MAA) and Mid-America Apartments, L.P.'s (MAALP) Report for the period ended September 30, 2015, filed with the SEC on October 30, 2015, formatted in Extensible Business Reporting Language (XBRL): (i) the Condensed Consolidated Balance Sheets as of September 30, 2015 (Unaudited) and December 31, 2014 (Unaudited); (ii) the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); (iii) the Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); (iv) the Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2015 (Unaudited) and 2014 (Unaudited); and (v) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text (Unaudited).

56

EX-12.1

EXHIBIT 12.1

Mid-America Apartment Communities, Inc.

Computation of Ratio of Earnings to Fixed Charges

(Dollars in thousands)

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Earnings:
Income from continuing operations	$	96,828	$	70,827		$	305,378	$	114,500
Equity in loss (income) of unconsolidated entities	1		(3,124		)	5		(6,019		)
Income tax expense	512		442			1,419		1,235
Income from continuing operations before equity in loss (income) of unconsolidated entities and income tax expense	97,341		68,145			306,802		109,716
Add:
Distribution of income from investments in unconsolidated entities	—		4,423			6		15,964
Fixed charges, less preferred distribution requirement of consolidated subsidiaries	30,578		29,654			92,824		93,828
Deduct:
Capitalized interest	349		403			1,313		1,253
Total Earnings (A)	$	127,570	$	101,819		$	398,319	$	218,255
Fixed charges and preferred dividends:
Interest expense	$	29,342	$	28,251		$	88,801	$	89,090
Amortization of deferred financing costs	887		1,000			2,710		3,485
Capitalized interest	349		403			1,313		1,253
Total Fixed Charges (B)	$	30,578	$	29,654		$	92,824	$	93,828
Preferred dividends, including redemption costs	—		—			—		—
Total Fixed Charges and Stock Dividends (C)	$	30,578	$	29,654		$	92,824	$	93,828
Ratio of Earnings to Fixed Charges (A/B)	4.2 x		3.4 x			4.3 x		2.3 x
Ratio of Earnings to Fixed Charges and Preferred Dividends (A/C)	4.2 x		3.4 x			4.3 x		2.3 x

EX-12.2

EXHIBIT 12.2

Mid-America Apartments, L.P.

Computation of Ratio of Earnings to Fixed Charges

(Dollars in thousands)

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Earnings:
Income from continuing operations	$	96,828	$	70,827		$	305,378	$	114,500
Equity in loss (income) of unconsolidated entities	1		(3,124		)	5		(6,019		)
Income tax expense	512		442			1,419		1,235
Income from continuing operations before equity in loss (income) of unconsolidated entities and income tax expense	97,341		68,145			306,802		109,716
Add:
Distribution of income from investments in unconsolidated entities	—		4,423			6		15,964
Fixed charges, less preferred distribution requirement of consolidated subsidiaries	30,578		29,654			92,824		93,828
Deduct:
Capitalized interest	349		403			1,313		1,253
Total Earnings (A)	$	127,570	$	101,819		$	398,319	$	218,255
Fixed charges and preferred dividends:
Interest expense	$	29,342	$	28,251		$	88,801	$	89,090
Amortization of deferred financing costs	887		1,000			2,710		3,485
Capitalized interest	349		403			1,313		1,253
Total Fixed Charges (B)	$	30,578	$	29,654		$	92,824	$	93,828
Preferred dividends, including redemption costs	—		—			—		—
Total Fixed Charges and Stock Dividends (C)	$	30,578	$	29,654		$	92,824	$	93,828
Ratio of Earnings to Fixed Charges (A/B)	4.2 x		3.4 x			4.3 x		2.3 x
Ratio of Earnings to Fixed Charges and Preferred Dividends (A/C)	4.2 x		3.4 x			4.3 x		2.3 x

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, H. Eric Bolton, Jr., certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Mid-America Apartment Communities, Inc.;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2015	/s/ H. Eric Bolton, Jr.
		H. Eric Bolton, Jr.
		Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Albert M. Campbell, III, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Mid-America Apartment Communities, Inc.;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2015	/s/ Albert M. Campbell, III
		Albert M. Campbell, III
		Chief Financial Officer

EX-31.3

EXHIBIT 31.3

CERTIFICATION

I, H. Eric Bolton, Jr., certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Mid-America Apartments, L.P.;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2015	/s/ H. Eric Bolton, Jr.
		H. Eric Bolton, Jr.
		Chief Executive Officer of Mid-America Apartment Communities, Inc., general partner of Mid-America Apartments, L.P.

EX-31.4

EXHIBIT 31.4

CERTIFICATION

I, Albert M. Campbell, III, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of Mid-America Apartments, L.P.;

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 30, 2015	/s/ Albert M. Campbell, III
		Albert M. Campbell, III
		Chief Financial Officer of Mid-America Apartment Communities, Inc., general partner of Mid-America Apartments, L.P.

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mid-America Apartment Communities, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, H. Eric Bolton, Jr., President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ H. Eric Bolton, Jr.

H. Eric Bolton, Jr.

Chief Executive Officer

October 30, 2015

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mid-America Apartment Communities, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Albert M. Campbell, III, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Albert M. Campbell, III

Albert M. Campbell, III

Chief Financial Officer

October 30, 2015

EX-32.3

EXHIBIT 32.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mid-America Apartments, L.P. (the “Operating Partnership”) on Form 10-Q for the period ended September 30, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, H. Eric Bolton, Jr., President and Chief Executive Officer of Mid-America Apartment Communities, Inc., general partner of the Operating Partnership, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ H. Eric Bolton, Jr.

H. Eric Bolton, Jr.

Chief Executive Officer of Mid-America Apartment Communities, Inc., general partner of Mid-America Apartments, L.P.

October 30, 2015

EX-32.4

EXHIBIT 32.4

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Mid-America Apartments, L.P. (the “Operating Partnership”) on Form 10-Q for the period ended September 30, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Albert M. Campbell, III, Executive Vice President and Chief Financial Officer of Mid-America Apartment Communities, Inc., general partner of the Operating Partnership, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ Albert M. Campbell, III

Albert M. Campbell, III

Chief Financial Officer of Mid-America Apartment Communities, Inc., general partner of Mid-America Apartments, L.P.

October 30, 2015

XML

MAALP Capital (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Limited Partners' Capital Account [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	$ 161,310	$ 166,746
Net Income Allocated to Limited Partners	16,078	6,364
General partner units issued in exchange for limited partner units	(236)	(992)
Adjustment for noncontrolling interest ownership in operating partnership	58	28
Distributions	(9,671)	(9,209)
Ending Balance	167,539	162,937
General Partners' Capital Account [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	2,890,858	2,946,598
Net Income Allocated to General Partners	289,300	113,455
Issuance of units	326	728
Units repurchased and retired	(957)	(456)
Exercise of unit options	420	11,916
General partner units issued in exchange for limited partner units	236	992
Units issued in exchange for redeemable units		998
Redeemable stock fair market value	(614)	(286)
Adjustment for noncontrolling interest ownership in operating partnership	(58)	(28)
Amortization of unearned compensation	4,950	3,180
Distributions	(174,100)	(164,598)
Ending Balance	3,010,361	2,912,499
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	(376)	174
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(6,222)	303
Ending Balance	(6,598)	477
Total Partnership Capital [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	3,051,792	3,113,518
Net Income Available for Common Unitholders	305,378	119,819
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(6,222)	303
Issuance of units	326	728
Units repurchased and retired	(957)	(456)
Exercise of unit options	420	11,916
General partner units issued in exchange for limited partner units	0	0
Units issued in exchange for redeemable units		998
Redeemable stock fair market value	(614)	(286)
Adjustment for noncontrolling interest ownership in operating partnership	0	0
Amortization of unearned compensation	4,950	3,180
Distributions	(183,771)	(173,807)
Ending Balance	$ 3,171,302	$ 3,075,913

XML

MAA Summary of Discontinued Operations (Detail) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental revenues	$ 0	$ 0	$ 0	$ 76
Other revenues	0	0	0	10
Total revenues	0	0	0	86
Property operating expenses	0	8	0	67
Depreciation and amortization	0	0	0	42
Interest expense and other	0	0	0	36
Total expenses	0	8	0	145
Income from discontinued operations before gain on sale	0	(8)	0	(59)
Net loss on insurance and other settlement proceeds on discontinued operations	0	3	0	0
Gain on sale of discontinued operations	0	(103)	0	5,378
Income from discontinued operations	0	(108)	0	5,319
Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Attributable to MAA	91,734	67,079	289,300	108,420
Attributable to noncontrolling interest	5,094	3,748	16,078	6,080
Income from continuing operations	96,828	70,827	305,378	114,500
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Attributable to MAA	0	(103)	0	5,035
Attributable to noncontrolling interest	0	(5)	0	284
Income from discontinued operations	$ 0	$ (108)	$ 0	$ 5,319

XML

Fair Value Disclosure of Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fixed Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, fair value	$ 2,460	$ 2,540
Notes Payable Excluding Interest Rate Swaps and Cap Agreements	2,420	2,500
Variable Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, fair value	990	970
Notes Payable Excluding Interest Rate Swaps and Cap Agreements	$ 1,010	$ 1,020
Minimum [Member] | Conventional Variable Rate Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Renewal Period	30 days
Maximum [Member] | Conventional Variable Rate Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Renewal Period	90 days

XML

Segment Information - Additional Information (Detail) individual in Millions	9 Months Ended
	Sep. 30, 2015 Property States individual
Segment Reporting Information [Line Items]
Number of owned or owned interests of apartment communities | Property	253
Number of states in which apartment units are located | States	15
Period properties owned and stabilized	12 months
Occupancy Level for Stabilized Communities	90.00%
Period Properties Stabilized	90 days
Large Market Same Store [Member]
Segment Reporting Information [Line Items]
Apartment Community Population	1
Percentage of Total Public Multifamily REIT Units	1.00%
Period properties owned and stabilized	12 months
Secondary Market Same Store [Member]
Segment Reporting Information [Line Items]
Apartment Community Population	1
Percentage of Total Public Multifamily REIT Units	1.00%
Period properties owned and stabilized	12 months
Non Same Store And Other [Member]
Segment Reporting Information [Line Items]
Percentage of Total Public Multifamily REIT Units	1.00%

XML

Derivatives and Hedging Activities Gross Presentation, Effects of Offsetting, and Net Presentation of Derivatives (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 6	$ 78
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability, Fair Value, Gross Liability	17,953	13,392
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	6	78
Derivative Liabilities [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	17,953	13,392
Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	6	78
Liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 17,953	$ 13,392

XML

Segment Information (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Revenues and NOI for Reportable Segment

Revenues and NOI for each reportable segment for the three- and nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Revenues
Large Market Same Store	$	149,642		$	140,452		$	438,184		$	411,851
Secondary Market Same Store	82,494			78,413			242,908			231,852
Non-Same Store and Other	29,862			30,698			98,349			95,256
Total property revenues	261,998			249,563			779,441			738,959
Management fee income	—			11			—			154
Total operating revenues	$	261,998		$	249,574		$	779,441		$	739,113
NOI
Large Market Same Store	$	91,237		$	84,084		$	266,941		$	247,256
Secondary Market Same Store	50,864			47,365			149,800			141,731
Non-Same Store and Other	18,298			17,232			59,597			54,666
Total NOI	160,399			148,681			476,338			443,653
Discontinued operations NOI included above	—			—			—			(1,102		)
Management fee income	—			11			—			154
Depreciation and amortization	(73,098		)	(70,222		)	(220,606		)	(229,866		)
Acquisition expense	(656		)	(13		)	(2,155		)	(971		)
Property management expense	(7,628		)	(7,429		)	(23,106		)	(24,019		)
General and administrative expense	(5,879		)	(6,511		)	(19,103		)	(16,065		)
Merger related expenses	—			(331		)	—			(3,202		)
Integration costs	—			(147		)	—			(7,140		)
Interest and other non-property (expense) income	(179		)	37			(359		)	1,077
Interest expense	(29,342		)	(28,251		)	(88,801		)	(89,090		)
Loss on debt extinguishment/modification	(5		)	(2,586		)	(3,384		)	(2,586		)
Amortization of deferred financing costs	(887		)	(1,000		)	(2,710		)	(3,485		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621			36,032			190,031			42,254
Net casualty (loss) gain after insurance and other settlement proceeds	(5		)	(126		)	485			(431		)
Income tax expense	(512		)	(442		)	(1,419		)	(1,235		)
Gain on sale of non-depreciable real estate assets	—			—			172			535
(Loss) gain from real estate joint ventures	(1		)	3,124			(5		)	6,019
Discontinued operations	—			(108		)	—			5,319
Net income attributable to noncontrolling interests	(5,094		)	(3,743		)	(16,078		)	(6,364		)
Net income attributable to MAA	$	91,734		$	66,976		$	289,300		$	113,455

Assets for Reportable Segment

Assets for each reportable segment as of September 30, 2015 and December 31, 2014, were as follows (dollars in thousands):

	September 30, 2015		December 31, 2014
Assets
Large Market Same Store	$	3,803,518	$	1,253,995
Secondary Market Same Store	1,676,365		1,003,426
Non-Same Store and Other	1,266,054		4,509,517
Corporate assets	141,404		66,656
Total assets	$	6,887,341	$	6,833,594

The decrease in the Non-Same Store and Other category, and subsequent increase in both the Large Market Same Store and Secondary Market Same Store categories, are due to the properties acquired as part of the merger with Colonial being moved out of Non-Same Store and into Same Store as the criteria noted above have been met.

XML

Assets for Reportable Segment (Detail) - Parent Company [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 6,887,341	$ 6,833,594
Large Market Same Store
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,803,518	1,253,995
Secondary Market Same Store
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,676,365	1,003,426
Non-Same Store and Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,266,054	4,509,517
Corporate assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 141,404	$ 66,656

XML

Earnings Per Common Share of MAA (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Common Share of MAA [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

Basic earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of shares outstanding during the period.  All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common shareholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per share. Both the unvested restricted shares and other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis with our diluted earnings per share being the more dilutive of the treasury stock or two-class methods.  OP Units are included in dilutive earnings per share calculations when they are dilutive to earnings per share. For the three and nine months ended September 30, 2015 and 2014, MAA's basic earnings per share is computed using the two-class method, and our diluted earnings per share is computed using the more dilutive of the treasury stock method or two-class method, as presented below:

(dollars and shares in thousands, except per share amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Shares Outstanding
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Weighted average partnership units outstanding	—			(1)	—			(1)	—			(1)	—			(1)
Effect of dilutive securities	—			(2)	—			(2)	—			(2)	—			(2)
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Calculation of Earnings per Share - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)		(3,748		)		(16,078		)		(6,080		)
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,948			$	288,632			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				5				—				(284		)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(103	)		$	—			$	5,025
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Earnings per share - basic	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Share - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)	(1)	(3,751		)	(1)	(16,080		)	(1)	(6,080		)	(1)
Income from continuing operations allocated to unvested restricted shares	(221		)	(2)	(131		)	(2)	(668		)	(2)	(212		)	(2)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,945			$	288,630			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				8			(1)	—				(284		)	(1)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(2)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(100	)		$	—			$	5,025
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Earnings per share - diluted	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For both the three and nine months ended September 30, 2015 and 2014, 4.2 million operating partnership units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

⁽²⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

XML

Shareholders' Equity of MAA - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) apartmentunits shares	Sep. 30, 2014 USD ($) shares	Dec. 31, 2014 shares
Statement [Line Items]
Common stock, shares outstanding	75,379,381	75,242,266
Total common shares and operating partnership units outstanding	79,564,446	79,444,389
Number of Units in Real Estate Property | apartmentunits	79,024
Treasury Stock, Shares, Acquired	11,914	9,292
Noncontrolling Interest [Member]
Statement [Line Items]
Common Shares Issuable Upon Conversion Of Convertible Stock	4,185,065	4,202,123
Parent Company [Member]
Statement [Line Items]
Common stock, shares outstanding	75,379,381		75,267,675
Exercise of stock options | $	$ 420	$ 11,916
Employee Stock Option [Member]
Statement [Line Items]
Common stock shares, outstanding option	58,112	81,654
Equity Option [Member]
Statement [Line Items]
Stock Issued During Period, Shares, New Issues		263,259

XML

Debt Structure (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total Outstanding Debt	$ 3,425,135	$ 3,520,000
Debt Instrument, Interest Rate, Effective Percentage	3.60%	3.70%
Contract Maturity	Sep. 18, 2019
Secured Debt [Member]
Debt Instrument [Line Items]
Total Outstanding Debt	$ 1,373,654
Debt Instrument, Interest Rate, Effective Percentage	3.30%
Contract Maturity	Dec. 20, 2018
Secured Debt [Member] | Mortgages [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Mortgage Loans on Real Estate	$ 1,052,869
Debt Instrument, Interest Rate, Effective Percentage	3.90%
Contract Maturity	Jul. 10, 2019
Secured Debt [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Total Outstanding Debt	$ 1,102,869
Debt Instrument, Interest Rate, Effective Percentage	3.90%
Contract Maturity	Jun. 02, 2019
Secured Debt [Member] | Variable Rate Debt
Debt Instrument [Line Items]
Total Outstanding Debt	$ 270,785
Debt Instrument, Interest Rate, Effective Percentage	0.80%
Contract Maturity	Feb. 18, 2017
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	$ 320,800
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Variable Rate Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.80%
Contract Maturity	Feb. 18, 2017
Line of Credit Facility, Amount Outstanding	$ 270,785
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.70%
Contract Maturity	Mar. 31, 2017
Line of Credit Facility, Amount Outstanding	$ 50,000
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.80%
Line of Credit Facility, Amount Outstanding	$ 270,800
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total Outstanding Debt	$ 2,051,481
Debt Instrument, Interest Rate, Effective Percentage	3.80%
Contract Maturity	Jun. 12, 2020
Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.29%
Line of Credit Facility, Amount Outstanding	$ 184,000
Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.30%
Contract Maturity	Aug. 07, 2017
Line of Credit Facility, Amount Outstanding	$ 184,000
Unsecured Debt [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.10%
Contract Maturity	Nov. 10, 2017
Debt Instrument, Face Amount	$ 550,000
Unsecured Debt [Member] | Senior Notes [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.50%
Contract Maturity	Dec. 04, 2021
Debt Instrument, Face Amount	$ 1,317,481

XML

MAA Equity (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 752,000	$ 747,000
Issuance and registration of common shares	2,000	2,000
Shares repurchased and retired	0	0
Exercise of stock options	0	3,000
Shares issued in exchange for units	0	0
Ending Balance	754,000	752,000
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3,619,270,000	3,599,549,000
Issuance and registration of common shares	324,000	726,000
Shares repurchased and retired	(957,000)	(456,000)
Exercise of stock options	420,000	11,913,000
Shares issued in exchange for units	236,000	992,000
Shares issued in exchange for redeemable stock		998,000
Adjustment for noncontrolling interest ownership in operating partnership	(409,000)	(55,000)
Amortization of unearned compensation	4,950,000	3,180,000
Ending Balance	3,623,834,000	3,616,847,000
Accumulated Distributions in Excess of Net Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(729,086,000)	(653,593,000)
Net income attributable to MAA	289,300,000	113,455,000
Redeemable stock fair market value	(614,000)	(286,000)
Dividends on common stock	(174,100,000)	(164,598,000)
Ending Balance	(614,500,000)	(705,022,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(412,000)	108,000
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(5,894,000)	288,000
Ending Balance	(6,306,000)	396,000
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	161,287,000	166,726,000
Net Income Attributable to Noncontrolling Interest	16,078,000	6,364,000
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(328,000)	15,000
Shares issued in exchange for units	(236,000)	(992,000)
Adjustment for noncontrolling interest ownership in operating partnership	409,000	55,000
Dividends on common stock	0	0
Dividends on noncontrolling interest units	(9,671,000)	(9,209,000)
Ending Balance	167,539,000	162,959,000
Stockholders' Equity, Total [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3,051,811,000	3,113,537,000
Net Income Including Portion Attributable to Noncontrolling Interest	305,378,000	119,819,000
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(6,222,000)	303,000
Issuance and registration of common shares	326,000	728,000
Shares repurchased and retired	(957,000)	(456,000)
Exercise of stock options	420,000	11,916,000
Shares issued in exchange for units	0	0
Shares issued in exchange for redeemable stock		998,000
Redeemable stock fair market value	(614,000)	(286,000)
Adjustment for noncontrolling interest ownership in operating partnership	0	0
Amortization of unearned compensation	4,950,000	3,180,000
Dividends on common stock	(174,100,000)	(164,598,000)
Dividends on noncontrolling interest units	(9,671,000)	(9,209,000)
Ending Balance	$ 3,171,321,000	$ 3,075,932,000

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Legal Proceedings (Details) $ in Millions	Sep. 30, 2015 USD ($) apartmentunits	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Number of Units in Real Estate Property	79,024
Loss Contingency Accrual | $	$ 13.1	$ 12.3
Regatta at James Island Litigation [Member]
Loss Contingencies [Line Items]
Number of Units in Real Estate Property	212

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Derivatives and Hedging Activities Other Comprehensive Income (Details) - Parent Company [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (412)	$ 108
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	(11,812)	(9,096)
Other Comprehensive Loss, Reclassification Adjustment from AOCI on Derivatives, Net of Tax	5,590	9,399
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	328	(15)
Other Comprehensive (Loss) Income , Net of Tax, Portion Attributable to Parent	(5,894)	$ 288
Ending Balance	$ (6,306)

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Earnings Per Common Share of MAA

9 Months Ended

Sep. 30, 2015

Earnings Per Common Share of MAA [Abstract]

Earnings Per Share [Text Block]

Earnings per Common Share of MAA

Basic earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of shares outstanding during the period.  All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common shareholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per share. Both the unvested restricted shares and other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis with our diluted earnings per share being the more dilutive of the treasury stock or two-class methods.  OP Units are included in dilutive earnings per share calculations when they are dilutive to earnings per share. For the three and nine months ended September 30, 2015 and 2014, MAA's basic earnings per share is computed using the two-class method, and our diluted earnings per share is computed using the more dilutive of the treasury stock method or two-class method, as presented below:

(dollars and shares in thousands, except per share amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Shares Outstanding
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Weighted average partnership units outstanding	—			(1)	—			(1)	—			(1)	—			(1)
Effect of dilutive securities	—			(2)	—			(2)	—			(2)	—			(2)
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Calculation of Earnings per Share - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)		(3,748		)		(16,078		)		(6,080		)
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,948			$	288,632			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				5				—				(284		)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(103	)		$	—			$	5,025
Weighted average common shares - basic	75,189				75,058				75,167				74,937
Earnings per share - basic	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Share - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations attributable to noncontrolling interests	(5,094		)	(1)	(3,751		)	(1)	(16,080		)	(1)	(6,080		)	(1)
Income from continuing operations allocated to unvested restricted shares	(221		)	(2)	(131		)	(2)	(668		)	(2)	(212		)	(2)
Income from continuing operations available for common shareholders, adjusted	$	91,513			$	66,945			$	288,630			$	108,208
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations attributable to noncontrolling interest	—				8			(1)	—				(284		)	(1)
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(2)
Income from discontinued operations available for common shareholders, adjusted	$	—			$	(100	)		$	—			$	5,025
Weighted average common shares - diluted	75,189				75,058				75,167				74,937
Earnings per share - diluted	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For both the three and nine months ended September 30, 2015 and 2014, 4.2 million operating partnership units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

⁽²⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Contract	Sep. 30, 2014 USD ($)
Credit Default Option [Member]
Derivative [Line Items]
Credit Risk Related Contingent Features Termination Value	$ 18,900,000		$ 18,900,000
Termination
Derivative [Line Items]
Fair Value of Credit Risk Derivatives	18,000,000		18,000,000
Net Liability Position [Member]
Derivative [Line Items]
Credit Risk Related Contingent Features Termination Value	$ 18,900,000		$ 18,900,000
Interest Rate Forward Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | Contract	3		3
Derivative, Notional Amount	$ 150,000,000		$ 150,000,000
Designated as Hedging Instrument [Member] | Interest Rate Caps
Derivative [Line Items]
Derivative, Number of Instruments Held | Contract	5		5
Derivative, Notional Amount	$ 125,000,000		$ 125,000,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | Contract	7		7
Derivative, Notional Amount	$ 550,000,000		$ 550,000,000
Designated as Hedging Instrument [Member] | Interest Expense
Derivative [Line Items]
Loss on Cash Flow Hedge Ineffectiveness	$ (44,000)	$ (25,000)	(117,000)	$ (88,000)
Change in fair value of interest rate derivatives included in AOCI and expected to be reclassified in the next 12 months			$ 5,000,000

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Notes Payable (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Debt Structure [Table Text Block]

Borrowings Overview

The following table summarizes our outstanding debt structure as of September 30, 2015 (dollars in thousands):

	Borrowed Balance		Effective Rate		Average Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	1,052,869	3.9	%	7/10/2019
Fannie Mae Facility	50,000		4.7	%	3/31/2017
Total fixed rate secured debt	$	1,102,869	3.9	%	6/2/2019
Variable Rate Secured Debt (1)
Fannie Mae Facility	270,785		0.8	%	2/18/2017
Total variable rate secured debt	$	270,785	0.8	%	2/18/2017
Total Secured Debt	$	1,373,654	3.3	%	12/20/2018
Unsecured Debt
Variable rate credit facility	$	184,000	1.3	%	8/7/2017
Term loans fixed with swaps	550,000		3.1	%	11/10/2017
Fixed rate senior bonds	1,317,481		4.5	%	12/4/2021
Total Unsecured Debt	$	2,051,481	3.8	%	6/12/2020
Total Outstanding Debt	$	3,425,135	3.6	%	9/18/2019

⁽¹⁾ Includes capped balances.

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MAALP Capital (Tables)

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

MAALP Capital [Abstract]

Partners' Capital [Table Text Block]

Total capital and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per unit data):

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2014	$	161,310		$	2,890,858		$	(376	)	$	3,051,792
Net income	16,078			289,300						305,378
Other comprehensive loss - derivative instruments (cash flow hedges)							(6,222		)	(6,222		)
Issuance of units				326						326
Units repurchased and retired				(957		)				(957		)
Exercise of unit options				420						420
General partner units issued in exchange for limited partner units	(236		)	236						—
Redeemable units fair market value adjustment				(614		)				(614		)
Adjustment for limited partners' capital at redemption value	58			(58		)				—
Amortization of unearned compensation				4,950						4,950
Distributions ($2.31 per unit)	(9,671		)	(174,100		)				(183,771		)
CAPITAL BALANCE SEPTEMBER 30, 2015	$	167,539		$	3,010,361		$	(6,598	)	$	3,171,302

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2013	$	166,746		$	2,946,598		$	174	$	3,113,518
Net income	6,364			113,455					119,819
Other comprehensive income - derivative instruments (cash flow hedges)							303		303
Issuance of units				728					728
Units repurchased and retired				(456		)			(456		)
Exercise of unit options				11,916					11,916
General partner units issued in exchange for limited partner units	(992		)	992					—
Units issued in exchange for redeemable units				998					998
Redeemable units fair market value adjustment				(286		)			(286		)
Adjustment for limited partners capital at redemption value	28			(28		)			—
Amortization of unearned compensation				3,180					3,180
Distributions ($2.19 per unit)	(9,209		)	(164,598		)			(173,807		)
CAPITAL BALANCE SEPTEMBER 30, 2014	$	162,937		$	2,912,499		$	477	$	3,075,913

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Revenues and NOI for Reportable Segment (Detail) - Parent Company [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Information
Total property revenues	$ 261,998	$ 249,563	$ 779,441	$ 738,959
Management fee income	0	11	0	154
Total operating revenues	261,998	249,574	779,441	739,113
Net Operating Income	160,399	148,681	476,338	443,653
Discontinued operations NOI included above	0	0	0	(1,102)
Depreciation and amortization	(73,098)	(70,222)	(220,606)	(229,866)
Acquisition expense	(656)	(13)	(2,155)	(971)
Property management expense	(7,628)	(7,429)	(23,106)	(24,019)
General and administrative expense	(5,879)	(6,511)	(19,103)	(16,065)
Merger related expenses	0	(331)	0	(3,202)
Integration costs	0	(147)	0	(7,140)
Interest and other non-property (expense) income	(179)	37	(359)	1,077
Interest expense	(29,342)	(28,251)	(88,801)	(89,090)
Loss on debt extinguishment	(5)	(2,586)	(3,384)	(2,586)
Amortization of deferred financing costs	(887)	(1,000)	(2,710)	(3,485)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621	36,032	190,031	42,254
Net casualty loss after insurance and other settlement proceeds	(5)	(126)	485	(431)
Income tax expense	(512)	(442)	(1,419)	(1,235)
Gain on sale of non-depreciable real estate assets	0	0	172	535
Gain (loss) from real estate joint ventures	(1)	3,124	(5)	6,019
Discontinued operations	0	(108)	0	5,319
Net income attributable to noncontrolling interests	(5,094)	(3,743)	(16,078)	(6,364)
Net income attributable to MAA	91,734	66,976	289,300	113,455
Large Market Same Store
Segment Information
Total property revenues	149,642	140,452	438,184	411,851
Net Operating Income	91,237	84,084	266,941	247,256
Secondary Market Same Store
Segment Information
Total property revenues	82,494	78,413	242,908	231,852
Net Operating Income	50,864	47,365	149,800	141,731
Non-Same Store and Other
Segment Information
Total property revenues	29,862	30,698	98,349	95,256
Net Operating Income	$ 18,298	$ 17,232	$ 59,597	$ 54,666

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Fair Values of Derivative Instruments on Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 6	$ 72
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	6
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, Liability	17,953	13,392
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0	0
Parent Company [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	6	72
Derivative financial instruments, Liability	17,953	13,392
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	0	6
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	$ 0	$ 0

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Derivatives and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk

As of September 30, 2015, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	5	$	125,000,000
Interest Rate Swaps(1)	7	$	550,000,000

Fair Values of Derivative Instruments on Condensed Consolidated Balance Sheet

Tabular Disclosure of Fair Values of Derivative Instruments on the Balance Sheets

The table below presents the fair value of our derivative financial instruments as well as their classification on the Condensed Consolidated Balance Sheet as of September 30, 2015 and December 31, 2014.

Fair Values of Derivative Instruments on the Condensed Consolidated Balance Sheets as of September 30, 2015 and

December 31, 2014 (dollars in thousands)

	Asset Derivatives					Liability Derivatives
		September 30, 2015		December 31, 2014			September 30, 2015		December 31, 2014
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	6	$	72	Fair market value of interest rate swaps	$	17,953	$	13,392
Total derivatives designated as hedging instruments		$	6	$	72		$	17,953	$	13,392
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	—	$	6		$	—	$	—
Total derivatives not designated as hedging instruments		$	—	$	6		$	—	$	—

Effect of Derivative Instruments on Consolidated Statement of Operations

Tabular Disclosure of the Effect of Derivative Instruments on the Statements of Operations

The table below presents the effect of our derivative financial instruments on the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 and 2014.

Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations for the

Three and nine months ended September 30, 2015 and 2014 (dollars in thousands)

Derivatives in Cash Flow Hedging Relationships	Amount of  Gain or (Loss) Recognized in  OCI on Derivative  (Effective Portion)						Location of Gain or (Loss) Reclassified  from Accumulated OCI into Income (Effective Portion)	Amount of   Gain or (Loss) Reclassified from Accumulated  OCI into Income  (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Three months ended September 30,	2015			2014				2015			2014				2015			2014
Interest rate contracts	$	(9,269	)	$	(696	)	Interest expense	$	(1,607	)	$	(2,589	)	Interest expense	$	(44	)	$	(25	)
Total derivatives in cash flow hedging relationships	$	(9,269	)	$	(696	)		$	(1,607	)	$	(2,589	)		$	(44	)	$	(25	)
Nine months ended September 30,
Interest rate contracts	$	(11,812	)	$	(9,096	)	Interest expense	$	(5,590	)	$	(9,399	)	Interest expense	$	(117	)	$	(88	)
Total derivatives in cash flow hedging relationships	$	(11,812	)	$	(9,096	)		$	(5,590	)	$	(9,399	)		$	(117	)	$	(88	)
Derivatives Not Designated as Hedging Instruments
Three months ended September 30,														Location of Gain or (Loss) Recognized in Income	2015			2014
Interest rate contracts														Interest expense	$	—		$	(10	)
Total															$	—		$	(10	)
Nine months ended September 30,
Interest rate contracts														Interest expense	$	(3	)	$	(138	)
Total															$	(3	)	$	(138	)

Offsetting Assets and Liabilities [Table Text Block]

The table below presents a gross presentation, the effects of offsetting, and a net presentation of our derivatives as of September 30, 2015 and December 31, 2014. The net amounts of derivative assets or liabilities can be reconciled to the Tabular Disclosure of Fair Values of Derivative Instruments above, which also provides the location that derivative assets and liabilities are presented on the Condensed Consolidated Balance Sheets (dollars in thousands):

Offsetting of Derivative Assets
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	6	$	—	$	6	$	—	$	—	$	6
Offsetting of Derivative Liabilities
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	17,953	$	—	$	17,953	$	—	$	—	$	17,953
Offsetting of Derivative Assets
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	78	$	—	$	78	$	—	$	—	$	78
Offsetting of Derivative Liabilities
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	13,392	$	—	$	13,392	$	—	$	—	$	13,392

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Other Comprehensive Income

Our other comprehensive income consists entirely of gains and losses attributable to the effective portion of our cash flow hedges. The chart below shows the change in the balance for the nine months ended September 30, 2015 and 2014 (dollars in thousands):

Changes in Accumulated Other Comprehensive Income by Component
	Affected Line Item in the Consolidated Statements Of Operations	Gains and Losses on Cash Flow Hedges
		for the nine months ended September 30,
		2015			2014
Beginning balance		$	(412	)	$	108
Other comprehensive loss before reclassifications		(11,812		)	(9,096		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	5,590			9,399
Net current-period other comprehensive loss (income) attributable to noncontrolling interest		328			(15		)
Net current-period other comprehensive (loss) income attributable to MAA		(5,894		)	288
Ending balance		$	(6,306	)	$	396

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Fair Value Disclosure of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The table below presents our assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014, aggregated by the level in the fair value hierarchy within which those measurements fall.

Assets and Liabilities Measured at Fair Value on a Recurring Basis at September 30, 2015

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							September 30, 2015
Assets
Derivative financial instruments	$	—	$	6	$	—	$	6
Liabilities
Derivative financial instruments	$	—	$	17,953	$	—	$	17,953

Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2014

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							December 31, 2014
Assets
Derivative financial instruments	$	—	$	78	$	—	$	78
Liabilities
Derivative financial instruments	$	—	$	13,392	$	—	$	13,392

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Basis of Presentation and Principles of Consolidation and Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Consolidation and Basis of Presentation and Significant Accounting Policies [Abstract]

Consolidation and Basis of Presentation and Significant Accounting Policies

Basis of Presentation and Principles of Consolidation and Significant Accounting Policies

Unless the context otherwise requires, all references to "we," "us," "our," or the "Company" refer collectively to Mid-America Apartment Communities, Inc., together with its consolidated subsidiaries, including the Mid-America Apartments, L.P. Unless the context otherwise requires, all references to "MAA" refer only to Mid-America Apartment Communities, Inc., and not any of its consolidated subsidiaries. Unless the context otherwise requires, the references to the "Operating Partnership" or "MAALP" refer to Mid-America Apartments, L.P. together with its consolidated subsidiaries. "Common stock" refers to the common stock of MAA and "shareholders" means the holders of shares of MAA’s common stock. The limited partnership interests of the Operating Partnership are referred to as "OP Units" and the holders of the OP Units are referred to as "unitholders".

As of September 30, 2015, MAA owned 75,379,381 units (or approximately 94.7%) of the limited partnership interests of the Operating Partnership. MAA conducts substantially all of its business and holds substantially all of its assets through the Operating Partnership, and by virtue of its ownership of the OP Units and being the Operating Partnership's sole general partner, MAA has the ability to control all of the day-to-day operations of the Operating Partnership.

We believe combining the notes to the consolidated financial statements of MAA and MAALP results in the following benefits:

• enhances a readers' understanding of MAA and the Operating Partnership by enabling the reader to view the business as a whole in the same manner that management views and operates the business; and

• eliminates duplicative disclosure and provides a more streamlined and readable presentation since a substantial portion of the disclosure applies to both MAA and the Operating Partnership.

Management operates MAA and the Operating Partnership as one business. The management of the Company is comprised of individuals who are officers of MAA and employees of the Operating Partnership. We believe it is important to understand the few differences between MAA and the Operating Partnership in the context of how MAA and the Operating Partnership operate as a consolidated company. MAA and the Operating Partnership are structured as an "umbrella partnership REIT," or UPREIT. MAA's interest in the Operating Partnership entitles MAA to share in cash distributions from, and in the profits and losses of, the Operating Partnership in proportion to MAA's percentage interest therein, and entitles MAA to vote on substantially all matters requiring a vote of the limited partners. MAA's only material asset is its ownership of limited partner interests in the Operating Partnership; therefore, MAA does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time, and guaranteeing certain debt of the Operating Partnership. The Operating Partnership holds, directly or indirectly, all of our real estate assets. Except for net proceeds from public equity issuances by MAA, which are contributed to the Operating Partnership in exchange for OP Units, the Operating Partnership generates the capital required by our business through the Operating Partnership's operations, direct or indirect incurrence of indebtedness, and issuance of partnership units.

The presentation of MAA's shareholders' equity and the Operating Partnership's capital are the principal areas of difference between the consolidated financial statements of MAA and those of the Operating Partnership. MAA's shareholders' equity may include shares of preferred stock, shares of common stock, additional paid-in capital, cumulative earnings, cumulative distributions, noncontrolling interest, preferred units, treasury shares, accumulated other comprehensive income and redeemable common units. The Operating Partnership's capital may include common capital and preferred capital of the general partner (MAA), limited partners' preferred capital, limited partners' noncontrolling interest, accumulated other comprehensive income and redeemable common units. Redeemable common units represent the number of outstanding OP Units as of the date of the applicable balance sheet, valued at the greater of the closing market price of MAA's common stock or the aggregate value of the individual partners' capital balances. Each redeemable OP Unit may be redeemed by the holder thereof for either cash equal to the fair market value of one share of common stock of MAA at the time of such redemption or, at the option of MAA, one share of common stock of MAA.

As of September 30, 2015, we owned and operated253 apartment communities comprising79,024 apartments located in 15 states principally through the Operating Partnership.

As of September 30, 2015, we had four development communities under construction totaling806 units, with232 units completed. Total expected costs for the development projects are $119.5 million, of which $65.5 million has been incurred through September 30, 2015. We expect to complete construction on the first project by the fourthquarter of 2015, the second project by the firstquarter of 2016, the third project by the third quarter of 2016, and the fourth project by the second quarter of 2017. Five of our multifamily properties include retail components with approximately 163,000 square feet of gross leasable area. We also have one wholly owned commercial property, which we acquired through our merger with Colonial Properties Trust, or Colonial, with approximately 196,000 square feet of gross leasable area, excluding tenant owned anchor stores, and one partially owned commercial property with approximately 30,000 square feet of gross leasable area.

Reclassifications

In order to present comparative financial statements, certain reclassifications have been made to prior period numbers. In our Form 10-Q for the three and nine months ended September 30, 2014, we reported approximately $0.3 million and $1.0 million, respectively, in permits and fees and general maintenance costs in the Other operating expense line of our Condensed Consolidated Statement of Operations. These costs have been reclassified to Building repairs and maintenance for the three and nine months ended September 30, 2014, presented in the Condensed Consolidated Statement of Operations included in this Report. In our Form 10-Q for the three and nine months ended September 30, 2014, we also reported approximately $8.6 million and $25.4 million, respectively, primarily for cable TV, trash removal, and telephone costs, in the Other operating expense line of our Condensed Consolidated Statement of Operations. These costs have been reclassified to Utilities for the three and nine months ended September 30, 2014, presented in the Condensed Consolidated Statement of Operations included in this Report. In our Form 10-K for the year ended December 31, 2014, we reported approximately $36.5 million as Assets held for sale, excluded from Real estate assets, net. These assets have been reclassified to Assets held for use within the applicable line items in the Condensed Consolidated Balance Sheet included in this Report. See further discussion on the held for sale reclassification in Note 12 to these condensed consolidated financial statements. These changes have been made in order to provide better insight into our property operating expenses and balance sheet position.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements have been prepared by our management in accordance with United States generally accepted accounting principles, or GAAP, and applicable rules and regulations of the Securities and Exchange Commission, or the SEC. The condensed consolidated financial statements of MAA presented herein include the accounts of MAA, the Operating Partnership, and all other subsidiaries in which MAA has a controlling financial interest. MAA owns approximately 94.7% to 100% of all consolidated subsidiaries. The condensed consolidated financial statements of MAALP presented herein include the accounts of MAALP and all other subsidiaries in which MAALP has a controlling financial interest. MAALP owns, directly or indirectly, 100% of all consolidated subsidiaries. In our opinion, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included, and all such adjustments were of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated in consolidation.

We invest in entities which may qualify as variable interest entities, or VIE. A VIE is a legal entity in which the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support or, as a group, the holders of the equity investment at risk lack the power to direct the activities of a legal entity as well as the obligation to absorb its expected losses or the right to receive its expected residual returns. We consolidate all VIEs for which we are the primary beneficiary and use the equity method to account for investments that qualify as VIEs but for which we are not the primary beneficiary. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including but not limited to, those activities that most significantly impact the VIE's economic performance and which party controls such activities.

We use the equity method of accounting for our investments in entities for which we exercise significant influence, but do not have the ability to exercise control. These entities are not variable interest entities. The factors considered in determining that we do not have the ability to exercise control include ownership of voting interests and participatory rights of investors.

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Schedule of Income from Continuing and Discontinued Operations Attributable to MAA and Noncontrolling Interest [Table Text Block]

The following is a summary of income from continuing and discontinued operations attributable to MAA and noncontrolling interest for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Income from continuing operations:
Attributable to MAA	$	91,734	$	67,079		$	289,300	$	108,420
Attributable to noncontrolling interest	5,094		3,748			16,078		6,080
Income from continuing operations	$	96,828	$	70,827		$	305,378	$	114,500
Income from discontinued operations:
Attributable to MAA	$	—	$	(103	)	$	—	$	5,035
Attributable to noncontrolling interest	—		(5		)	—		284
Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

Disposal Groups, Including Discontinued Operations [Table Text Block]

The following is a summary of earnings from discontinued operations for MAA and MAALP for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Revenues
Rental revenues	$	—	$	—		$	—	$	76
Other revenues	—		—			—		10
Total revenues	$	—	$	—		$	—	$	86
Expenses
Property operating expenses	$	—	$	8		$	—	$	67
Depreciation and amortization	—		—			—		42
Interest expense and other	—		—			—		36
Total expense	$	—	$	8		$	—	$	145
Loss from discontinued operations before gain on sale	$	—	$	(8	)	$	—	$	(59	)
Net loss on insurance and other settlement proceeds on discontinued operations	—		3			—		—
Gain on sale of discontinued operations	—		(103		)	—		5,378
(Loss) Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

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MAALP Capital Parenthetical (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Limited Partner [Member]
Capital Disclosure [Line Items]
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$ 0.77	$ 0.73	$ 2.31	$ 2.19

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Discontinued Operations - Additional Information (Detail) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($) apartmentunits Communities	Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and Amortization, Discontinued Operations	$ 2.3
Number Of Properties Sold | Communities	1
Number of Units in Real Estate Property | apartmentunits	79,024
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prior Period Reclassification Adjustment	$ 34.1	$ 36.5

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MAA Condensed Consolidated Balance Sheets - Parent Company [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets:
Land	$ 913,045	$ 913,408
Buildings and improvements	6,842,089	6,781,210
Furniture, fixtures and equipment	223,759	214,742
Development and capital improvements in progress	44,645	80,772
Real Estate Investment Property, at Cost	8,023,538	7,990,132
Less accumulated depreciation	(1,410,155)	(1,358,400)
Real Estate Investment Property, Net	6,613,383	6,631,732
Undeveloped land	51,779	55,997
Corporate properties, net	8,606	7,988
Investments in real estate joint ventures	1,807	1,791
Real estate assets, net	6,675,575	6,697,508
Cash and cash equivalents	44,876	26,653
Restricted cash	89,321	28,181
Deferred financing costs, net	11,901	17,812
Other assets	64,061	61,119
Goodwill	1,607	2,321
Total assets	6,887,341	6,833,594
Liabilities:
Secured notes payable	1,373,654	1,592,116
Unsecured notes payable	2,051,481	1,932,399
Accounts payable	10,509	8,395
Fair market value of interest rate swaps	17,953	13,392
Accrued expenses and other liabilities	243,711	219,044
Security deposits	11,446	10,526
Total liabilities	3,708,754	3,775,872
Redeemable stock	7,266	5,911
Shareholders' equity:
Common stock	754	752
Additional paid-in capital	3,623,834	3,619,270
Accumulated distributions in excess of net income	(614,500)	(729,086)
Accumulated other comprehensive loss	(6,306)	(412)
Total MAA shareholders' equity	3,003,782	2,890,524
Noncontrolling interest	167,539	161,287
Total equity	3,171,321	3,051,811
Total liabilities and equity	$ 6,887,341	$ 6,833,594
Redeemable stock, shares issued and outstanding	88,745	87,818

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Effect of Derivative Instruments on Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	$ (9,269)	$ (696)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	(1,607)	(2,589)	$ (5,590)	$ (9,399)
(Loss) Gain on Cash Flow Hedge Ineffectiveness, Net	(44)	(25)	(117)	(88)
Designated as Hedging Instrument [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	(1,607)	(2,589)	5,590	9,399
(Loss) Gain on Cash Flow Hedge Ineffectiveness, Net	(44)	(25)	(117)	(88)
Designated as Hedging Instrument [Member] | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) or Gain Recognized in OCI on Derivative (Effective Portion)	(9,269)	(696)	(11,812)	(9,096)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Income, Net	0	(10)	(3)	(138)
Not Designated as Hedging Instrument [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, (Loss) Gain Recognized in Income, Net	$ 0	$ (10)	$ (3)	$ (138)

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Parent Company [Member]
Consolidated net income	$ 96,828	$ 70,719	$ 305,378	$ 119,819
Unrealized loss from the effective portion of derivitave insturments	(9,269)	(696)	(11,812)	(9,096)
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments	1,607	2,589	5,590	9,399
Total comprehensive income	89,166	72,612	299,156	120,122
Less: comprehensive income attributable to noncontrolling interests	(4,690)	(3,845)	(15,750)	(6,379)
Comprehensive income attributable to MAA	84,476	68,767	283,406	113,743
Limited Partner [Member]
Consolidated net income	96,828	70,719	305,378	119,819
Unrealized loss from the effective portion of derivitave insturments	(9,269)	(696)	(11,812)	(9,096)
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments	1,607	2,589	5,590	9,399
Comprehensive income attributable to Mid-America Apartments, L.P.	$ 89,166	$ 72,612	$ 299,156	$ 120,122

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Subsequent Events - Additional Information (Detail) $ in Millions	Oct. 23, 2015	Oct. 15, 2015 USD ($)	Oct. 14, 2015 USD ($) a	Oct. 02, 2015 USD ($)	Oct. 01, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014
Subsequent Event [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						3.60%	3.70%
Retreat at West Creek [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Area of Land | a			4.4
Business Acquisition, Cost of Entity Acquired, Purchase Price			$ 3.0
Unsecured Debt [Member]
Subsequent Event [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						3.80%
Unsecured Debt [Member] | KeyBank Term Loan [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount						$ 150.0
Debt Instrument, Interest Rate, Effective Percentage						1.35%
Unsecured Debt [Member] | KeyBank Term Loan [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.10%
Unsecured Debt [Member] | $750 million unsecured revolving credit facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 750.0
Debt Instrument, Interest Rate, Effective Percentage		1.00%
Fixed Rate Debt | Unsecured Debt [Member] | Public Income Notes [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount						$ 1,000.0
Fixed Rate Debt | Unsecured Debt [Member] | Public Income Notes [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount					$ 184.9
Interest Rate Forward Swap [Member]
Subsequent Event [Line Items]
Derivative, Notional Amount						$ 150.0
Interest Rate Forward Swap [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Derivative, Notional Amount				$ 50.0
Maximum [Member] | Unsecured Debt [Member] | $750 million unsecured revolving credit facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,500.0

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Earnings Per Common Share of MAA (Details) - Parent Company [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share Disclosure [Line Items]
Weighted average common shares - basic		75,189	75,058		75,167	74,937
Weighted average partnership units outstanding	[1]	0	0		0	0
Effect of dilutive securities	[2]	0	0		0	0
Weighted average common shares - diluted		75,189	75,058		75,167	74,937
Calculation of Basic Earnings per Share [Member]
Earnings Per Share Disclosure [Line Items]
Income from continuing operations		$ 96,828	$ 70,827		$ 305,378	$ 114,500
Income from continuing operations attributable to noncontrolling interests		(5,094)	(3,748)		(16,078)	(6,080)
Income from continuing operations allocated to unvested restricted shares		(221)	(131)		(668)	(212)
Income from continuing operations available for common shareholders, adjusted		91,513	66,948		288,632	108,208
Income from discontinued operations		0	(108)		0	5,319
Income from discontinued operations attributable to noncontrolling interest		0	5		0	(284)
Income from discontinued operations allocated to unvested restricted shares		0	0		0	(10)
Income from discontinued operations available for common shareholders, adjusted		$ 0	$ (103)		$ 0	$ 5,025
Earnings per share - basic		$ 1.22	$ 0.89		$ 3.84	$ 1.51
Calculation of Diluted Earnings per Share [Member]
Earnings Per Share Disclosure [Line Items]
Income from continuing operations		$ 96,828	$ 70,827		$ 305,378	$ 114,500
Income from continuing operations attributable to noncontrolling interests	[1]	(5,094)	(3,751)		(16,080)	(6,080)
Income from continuing operations allocated to unvested restricted shares	[2]	(221)	(131)		(668)	(212)
Income from continuing operations available for common shareholders, adjusted		91,513	66,945		288,630	108,208
Income from discontinued operations		0	(108)		0	5,319
Income from discontinued operations attributable to noncontrolling interest		0	8	[1]	0	(284)	[1]
Income from discontinued operations allocated to unvested restricted shares		0	0		0	(10)	[2]
Income from discontinued operations available for common shareholders, adjusted		$ 0	$ (100)		$ 0	$ 5,025
Earnings per share - diluted		$ 1.22	$ 0.89		$ 3.84	$ 1.51
Limited Partnership Units [Member]
Earnings Per Share Disclosure [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount					4,200
Restricted Stock [Member]
Earnings Per Share Disclosure [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		200			100

[1] (1) For both the three and nine months ended September 30, 2015 and 2014, 4.2 million operating partnership units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

[2] (2) For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Recent Accounting Pronouncements

 Recent Accounting Pronouncements

The following table provides a brief description of recent accounting pronouncements that could have a material effect on our financial statements:

Standard	Description	Date of Adoption	Effect on the Financial Statements or Other Significant Matters
Accounting Standards Update (ASU) 2015-03 and ASU 2015-15, Interest - Imputation of Interest	ASU 2015-03, requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. ASU 2015-15 provides additional guidance to ASU 2015-03, which did not address presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. ASU 2015-15 noted that the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement.	This ASU is effective for annual periods ending after December 15, 2015; however, early adoption is permitted.	We are currently in the process of evaluating the impact of this ASU, but do not expect the adoption of this ASU to have a material impact on our consolidated financial position or results of operations taken as a whole.
ASU 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern	This ASU requires an entity's management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date that the financial statements are issued. If substantial doubt exists, the entity must disclose the principal conditions or events that raised the substantial doubt, management's evaluation of the significance of these conditions, and management's plan for alleviating the substantial doubt about the entity's ability to continue as a going concern.	This ASU is effective for annual periods ending after December 15, 2016; however, early adoption is permitted.	We are currently in the process of evaluating the impact of this ASU, but do not expect the adoption of this ASU to have a material impact on our consolidated financial position or results of operations taken as a whole.
ASU 2014-09, Revenue from Contracts with Customers	This ASU establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services.	This ASU is effective for annual reporting periods beginning after December 15, 2017, as a result of a deferral of the effective date arising from the issuance of ASU 2015-14, Revenue from Contracts with Customers - Deferral of the Effective Date. Early adoption is permitted.	The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. We are currently in the process of evaluating the impact of adoption of this ASU on our consolidated financial condition and results of operations taken as a whole, but do not expect the impact to be material. We have not yet determined which method will be used for initial application.
ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity	This ASU raises the threshold for disposals to qualify as discontinued operations. It also requires additional disclosures for discontinued operations and new disclosures for individually material disposal transactions that do not meet the definition of a discontinued operation.	This ASU is effective for fiscal years beginning after December 15, 2014, and interim periods within those years; however, early adoption is permitted beginning in the first quarter of 2014.	We adopted this ASU on January 1, 2014. The adoption of this ASU required us to not classify certain disposals occurring during 2014 as discontinued operations.The 2014 dispositions did not qualify for discontinued operations treatment and therefore the gains on these properties are presented as a component of continuing operations for 2014.

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Earnings Per OP Unit of MAALP Statement (details) - Limited Partner [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share Disclosure [Line Items]
Weighted average common units - basic		79,374	79,263	79,356	79,148
Effect of dilutive securities	[1]	0	0	0	0
Weighted average common shares - diluted		79,374	79,263	79,356	79,148
Calculation of Basic Earnings Per Unit [Member]
Earnings Per Share Disclosure [Line Items]
Income from continuing operations		$ 96,828	$ 70,827	$ 305,378	$ 114,500
Income from continuing operations allocated to unvested restricted shares		(221)	(131)	(668)	(212)
Income from continuing operations available for common unitholders, adjusted		96,607	70,696	304,710	114,288
Income from discontinued operations		0	(108)	0	5,319
Income from discontinued operations allocated to unvested restricted shares		0	0	0	(10)
Income from discontinued operations available for common unitholders, adjusted		$ 0	$ (108)	$ 0	$ 5,309
Earnings per unit - basic		$ 1.22	$ 0.89	$ 3.84	$ 1.51
Calculation of Diluted Earnings Per Unit [Member]
Earnings Per Share Disclosure [Line Items]
Income from continuing operations		$ 96,828	$ 70,827	$ 305,378	$ 114,500
Income from continuing operations allocated to unvested restricted shares	[1]	(221)	(131)	(668)	(212)
Income from continuing operations available for common unitholders, adjusted		96,607	70,696	304,710	114,288
Income from discontinued operations		0	(108)	0	5,319
Income from discontinued operations allocated to unvested restricted shares		0	0	0	(10)	[1]
Income from discontinued operations available for common unitholders, adjusted		$ 0	$ (108)	$ 0	$ 5,309
Earnings per unit - diluted		$ 1.22	$ 0.89	$ 3.84	$ 1.51
Restricted Stock [Member]
Earnings Per Share Disclosure [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		200		100

[1] (1) For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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Basis of Presentation and Principles of Consolidation (Policies)

9 Months Ended

Sep. 30, 2015

Basis of Presentation and Principles of Consolidation [Abstract]

Basis Of Presentation And Principles Of Consolidation Policy [Policy Text Block]

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements have been prepared by our management in accordance with United States generally accepted accounting principles, or GAAP, and applicable rules and regulations of the Securities and Exchange Commission, or the SEC. The condensed consolidated financial statements of MAA presented herein include the accounts of MAA, the Operating Partnership, and all other subsidiaries in which MAA has a controlling financial interest. MAA owns approximately 94.7% to 100% of all consolidated subsidiaries. The condensed consolidated financial statements of MAALP presented herein include the accounts of MAALP and all other subsidiaries in which MAALP has a controlling financial interest. MAALP owns, directly or indirectly, 100% of all consolidated subsidiaries. In our opinion, all adjustments necessary for a fair presentation of the condensed consolidated financial statements have been included, and all such adjustments were of a normal recurring nature. All significant intercompany accounts and transactions have been eliminated in consolidation.

We invest in entities which may qualify as variable interest entities, or VIE. A VIE is a legal entity in which the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support or, as a group, the holders of the equity investment at risk lack the power to direct the activities of a legal entity as well as the obligation to absorb its expected losses or the right to receive its expected residual returns. We consolidate all VIEs for which we are the primary beneficiary and use the equity method to account for investments that qualify as VIEs but for which we are not the primary beneficiary. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including but not limited to, those activities that most significantly impact the VIE's economic performance and which party controls such activities.

We use the equity method of accounting for our investments in entities for which we exercise significant influence, but do not have the ability to exercise control. These entities are not variable interest entities. The factors considered in determining that we do not have the ability to exercise control include ownership of voting interests and participatory rights of investors.

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Parent Company [Member]
Cash flows from operating activities:
Consolidated net income	$ 305,378	$ 119,819
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue accretion	(952)	(17)
Depreciation and amortization	223,651	233,312
Stock compensation expense	4,438	3,180
Redeemable stock issued	741	690
Amortization of debt premium	(15,465)	(20,121)
(Gain) loss from investments in real estate joint ventures	6	(3,159)
Loss on debt extinguishment	2,788	2,586
Derivative interest (credit) expense	(1,567)	(2,543)
Gain (Loss) on Sale of Derivatives	0	(3,625)
Gain on sale of non-depreciable real estate assets	(172)	(535)
Gain on sale of depreciable real estate assets excluded from discontinued operations	(190,031)	(42,254)
Gain on sale of discontinued operations	0	(5,378)
Net casualty loss and other settlement proceeds	(485)	431
Changes in assets and liabilities:
Restricted cash	(1,533)	(11,262)
Other assets	5,927	(5,016)
Accounts payable	(1,211)	(1,665)
Accrued expenses and other	28,877	32,209
Security deposits	1,146	688
Net cash provided by operating activities	361,536	297,340
Cash flows from investing activities:
Purchases of real estate and other assets	(248,668)	(155,679)
Normal capital improvements	(72,786)	(72,045)
Construction capital and other improvements	(5,479)	(6,287)
Renovations to existing real estate assets	(22,470)	(15,484)
Development	(24,870)	(57,705)
Distributions from real estate joint ventures	6	15,964
Contributions to Real Estate Joint Ventures	(29)	0
Proceeds from disposition of real estate assets	358,017	241,691
(Funding) return of escrow for future acquisitions	(59,607)	(5,589)
Net cash (used in) provided by investing activities	(75,886)	(55,134)
Cash flows from financing activities:
Net change in credit lines	8,885	(216,184)
Proceeds from notes payable	0	396,532
Principal payments on notes payable	(92,211)	(258,105)
Payment of deferred financing costs	(178)	(4,156)
Repurchase of common stock	(957)	(456)
Proceeds from issuances of common shares	326	728
Exercise of stock options	420	11,916
Distributions to noncontrolling interests	(9,676)	(9,227)
Dividends paid on common shares	(174,036)	(164,298)
Net cash used in financing activities	(267,427)	(243,250)
Net (decrease) increase in cash and cash equivalents	18,223	(1,044)
Cash and cash equivalents, beginning of period	26,653	89,333
Cash and cash equivalents, end of period	44,876	88,289
Supplemental disclosure of cash flow information:
Interest paid	97,798	101,252
Income Taxes Paid	2,095	1,596
Supplemental disclosure of noncash investing and financing activities:
Conversion of units to shares of common stock	236	992
Accrued construction in progress	8,333	6,539
Interest capitalized	1,313	1,253
Marked-to-market adjustment on derivative instruments	(4,632)	6,471
Fair value adjustment on debt assumed	0	2,720
Loan assumption	0	52,521
Limited Partner [Member]
Cash flows from operating activities:
Consolidated net income	305,378	119,819
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue accretion	(952)	(17)
Depreciation and amortization	223,651	233,312
Stock compensation expense	4,438	3,180
Redeemable stock issued	741	690
Amortization of debt premium	(15,465)	(20,121)
(Gain) loss from investments in real estate joint ventures	6	(3,159)
Loss on debt extinguishment	2,788	2,586
Derivative interest (credit) expense	(1,567)	(2,543)
Gain (Loss) on Sale of Derivatives	0	(3,625)
Gain on sale of non-depreciable real estate assets	(172)	(535)
Gain on sale of depreciable real estate assets excluded from discontinued operations	(190,031)	(42,254)
Gain on sale of discontinued operations	0	(5,378)
Net casualty loss and other settlement proceeds	(485)	431
Changes in assets and liabilities:
Restricted cash	(1,533)	(11,262)
Other assets	5,927	(5,016)
Accounts payable	(1,211)	(1,665)
Accrued expenses and other	28,877	32,209
Security deposits	1,146	688
Net cash provided by operating activities	361,536	297,340
Cash flows from investing activities:
Purchases of real estate and other assets	(248,668)	(155,679)
Normal capital improvements	(72,786)	(72,045)
Construction capital and other improvements	(5,479)	(6,287)
Renovations to existing real estate assets	(22,470)	(15,484)
Development	(24,870)	(57,705)
Distributions from real estate joint ventures	6	15,964
Contributions to Real Estate Joint Ventures	(29)	0
Proceeds from disposition of real estate assets	358,017	241,691
(Funding) return of escrow for future acquisitions	(59,607)	(5,589)
Net cash (used in) provided by investing activities	(75,886)	(55,134)
Cash flows from financing activities:
Net change in credit lines	8,885	(216,184)
Proceeds from notes payable	0	396,532
Principal payments on notes payable	(92,211)	(258,105)
Payment of deferred financing costs	(178)	(4,156)
Repurchase of common units	(957)	(456)
Proceeds from issuances of common units	326	728
Exercise of stock options	420	11,916
Distributions paid on common units	(183,712)	(173,525)
Net cash used in financing activities	(267,427)	(243,250)
Net (decrease) increase in cash and cash equivalents	18,223	(1,044)
Cash and cash equivalents, beginning of period	26,653	89,333
Cash and cash equivalents, end of period	44,876	88,289
Supplemental disclosure of cash flow information:
Interest paid	97,798	101,252
Income Taxes Paid	2,095	1,596
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	8,333	6,539
Interest capitalized	1,313	1,253
Marked-to-market adjustment on derivative instruments	(4,632)	6,471
Fair value adjustment on debt assumed	0	2,720
Loan assumption	$ 0	$ 52,521

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MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets:
Land	$ 913,045	$ 913,408
Buildings and improvements	6,842,089	6,781,210
Furniture, fixtures and equipment	223,759	214,742
Development and capital improvements in progress	44,645	80,772
Real Estate Investment Property, at Cost	8,023,538	7,990,132
Less accumulated depreciation	(1,410,155)	(1,358,400)
Real Estate Investment Property, Net	6,613,383	6,631,732
Undeveloped land	51,779	55,997
Corporate properties, net	8,606	7,988
Investments in real estate joint ventures	1,807	1,791
Real estate assets, net	6,675,575	6,697,508
Cash and cash equivalents	44,876	26,653
Restricted cash	89,321	28,181
Deferred financing costs, net	11,901	17,812
Other assets	64,061	61,119
Goodwill	1,607	2,321
Total assets	6,887,341	6,833,594
Liabilities:
Secured notes payable	1,373,654	1,592,116
Unsecured notes payable	2,051,481	1,932,399
Accounts payable	10,509	8,395
Fair market value of interest rate swaps	17,953	13,392
Accrued expenses and other liabilities	243,711	219,044
Security deposits	11,446	10,526
Due to general partner	19	19
Total liabilities	3,708,773	3,775,891
Redeemable units	7,266	5,911
Capital [Abstract]
General Partners' Capital Account	3,010,361	2,890,858
Limited Partners' Capital Account	167,539	161,310
Accumulated other comprehensive loss	(6,598)	(376)
Total Capital	3,171,302	3,051,792
Total Liabilities and Capital	$ 6,887,341	$ 6,833,594
Redeemable units, units issued and outstanding	88,745	87,818

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Partners' Capital of Mid-America Apartments, L.P.

9 Months Ended

Sep. 30, 2015

Partners' Capital of Mid-America Apartments, L.P. [Abstract]

Partners' Capital Notes Disclosure [Text Block]

Partners' Capital of Mid-America Apartments, L.P.

OP Units

As of September 30, 2015, there were 79,564,446 OP Units outstanding, 75,379,381, or 94.7%, of which were owned by MAA, the Operating Partnership's general partner. The remaining 4,185,065 OP Units were owned by non-affiliated limited partners (Class A Limited Partners). As of September 30, 2014, there were 79,444,389 OP Units outstanding, 75,242,266, or 94.7%, of which were owned by MAA and 4,202,123 of which were owned by the Class A Limited Partners.

MAA, as the sole general partner of the Operating Partnership, has full, complete and exclusive discretion to manage and control the business of the Operating Partnership subject to the restrictions specifically contained within the Operating Partnership's agreement of limited partnership, or the Partnership Agreement. Unless otherwise stated in the Partnership Agreement, this power includes, but is not limited to acquiring, leasing, or disposing of any real property; constructing buildings and making other improvements to properties owned; borrowing money, modifying or extinguishing current borrowings, issuing evidence of indebtedness, and securing such indebtedness by mortgage, deed of trust, pledge or other lien on the Operating Partnership's assets; and distribution of Operating Partnership cash or other assets in accordance with the Partnership Agreement. MAA can generally, at its sole discretion, issue and redeem OP Units and determine the consideration to be received or the redemption price to be paid, as applicable. MAA may delegate these and other powers granted if MAA remains in supervision of the designee.

Under the Partnership Agreement, the Operating Partnership may issue Class A OP Units and Class B OP Units. Class A OP Units may only be held by limited partners other than MAA, in its capacity as general partner of the Operating Partnership, or its subsidiaries, while Class B OP Units may only be held by MAA, in its capacity as general partner of the Operating Partnership, and as of September 30, 2015, a total of 4,185,065 Class A OP Units in the Operating Partnership were held by limited partners other than MAA or its subsidiaries, while a total of 75,379,381 Class B OP Units were held by MAA. In general, the limited partners do not have the power to participate in the management or control of the Operating Partnership's business except in limited circumstances including changes in the general partner and protective rights if the general partner acts outside of the provisions provided in the Partnership Agreement. The transferability of Class A OP Units is also limited by the Partnership Agreement.

Net income is allocated to the general partner and limited partners based on their respective ownership percentages of the OP Units. Issuance or redemption of additional Class A OP Units or Class B OP Units changes the relative ownership percentage of the partners. The issuance of Class B OP Units generally occurs when MAA issues common stock and the proceeds from that issuance are contributed to the Operating Partnership in exchange for the issuance to MAA of a number of OP Units equal to the number of shares of common stock issued. Likewise, if MAA repurchases or redeems outstanding shares of common stock, the Operating Partnership generally redeems an equal number of Class B OP Units with similar terms held by MAA for a redemption price equal to the purchase price of those shares of common stock. At each reporting period, the allocation between general partner capital and limited partner capital is adjusted to account for the change in the respective percentage ownership of the underlying capital of the Operating Partnership. Holders of the Class A OP Units may require MAA to redeem their Class A OP Units, in which case MAA may, at its option, pay the redemption price either in cash (in an amount per Class A OP Unit equal, in general, to the average closing price of MAA's common stock on the New York Stock Exchange over a specified period prior to the redemption date) or by delivering one share of MAA common stock (subject to adjustment under specified circumstances) for each Class A OP Unit so redeemed.

At September 30, 2015, a total of 4,185,065 Class A OP Units were outstanding and redeemable for 4,185,065 shares of MAA common stock or approximately $342.6 million, based on the closing price of MAA’s common stock on September 30, 2015 of $81.87 per share, at MAA’s option. At September 30, 2014, a total of 4,202,123 Class A OP Units were outstanding and redeemable for 4,202,123 shares of MAA common stock or approximately $275.9 million, based on the closing price of MAA’s common stock on September 30, 2014 of $65.65 per share, at MAA’s option.

The Operating Partnership pays the same per unit distribution in respect to the OP Units as the per share dividend MAA pays in respect to its common and preferred stock.

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 26, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	MAA
Entity Registrant Name	MID AMERICA APARTMENT COMMUNITIES INC
Entity Central Index Key	0000912595
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		75,379,381
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Limited Partner [Member]
Document Information [Line Items]
Entity Registrant Name	MID-AMERICA APARTMENTS, L.P.
Entity Central Index Key	0001581776
Entity Filer Category	Non-accelerated Filer

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Legal Proceedings

9 Months Ended

Sep. 30, 2015

Legal Proceedings [Abstract]

Legal Matters and Contingencies [Text Block]

Legal Proceedings

We, along with multiple other parties, are named defendants in lawsuits arising out of alleged construction deficiencies with respect to condominium units at Regatta at James Island in Charleston, South Carolina. The Regatta at James Island property was developed by certain of our subsidiaries prior to MAA's merger with Colonial and constructed by Colonial Construction Services, LLC. The condominiums were constructed in 2006 and all 212 units were sold. The lawsuits, one filed on behalf of the condominium homeowners association and one filed by three of the unit owners (purportedly on behalf of all unit owners), were filed in South Carolina state court (Charleston County) in August 2012, against various parties involved in the development and construction of the Regatta at James Island property, including the contractors, subcontractors, architect, developer, and product manufacturers. The plaintiffs are seeking damages resulting primarily from alleged construction deficiencies, but the amount plaintiffs seek to recover has not been disclosed. The lawsuits are currently in discovery. We are continuing to investigate the matter and evaluate our options and intend to vigorously defend ourselves against these claims. No assurance can be given that the matter will be resolved favorably to us. We have included in our loss contingency an estimate of probable loss in connection with this matter, but currently cannot reasonably estimate any further possible loss, or any further range of reasonably possible loss, in connection with this matter.

In addition, we are subject to various other legal proceedings and claims that arise in the ordinary course of our business operations. Matters which arise out of allegations of bodily injury, property damage, and employment practices are generally covered by insurance. While the resolution of these other matters cannot be predicted with certainty, management currently believes the final outcome of such matters will not have a material adverse effect on our financial position, results of operations or cash flows.

Loss Contingencies

The outcomes of the claims, disputes and legal proceedings described or referenced above are subject to significant uncertainty. We record an accrual for loss contingencies when a loss is probable and the amount of the loss can be reasonably estimated. We review these accruals quarterly and make revisions based on changes in facts and circumstances. When a loss contingency is not both probable and reasonably estimable, we do not accrue the loss. However, for material loss contingencies, if the unrecorded loss (or an additional loss in excess of the accrual) is at least a reasonable possibility and material, then we disclose a reasonable estimate of the possible loss, or range of loss, if such reasonable estimate can be made. If we cannot make a reasonable estimate of the possible loss, or range of loss, then that is disclosed.

The assessment of whether a loss is probable or a reasonable possibility, and whether the loss or range of loss is reasonably estimable, often involves a series of complex judgments about future events. Among the factors that we consider in this assessment, including with respect to the matters disclosed in this Note, are the nature of existing legal proceedings and claims, the asserted or possible damages or loss contingency (if reasonably estimable), the progress of the matter, existing law and precedent, the opinions or views of legal counsel and other advisers, our experience in similar matters, the facts available to us at the time of assessment, and how we intend to respond, or have responded, to the proceeding or claim. Our assessment of these factors may change over time as individual proceedings or claims progress. For matters where we are not currently able to reasonably estimate a range of reasonably possible loss, the factors that have contributed to this determination include the following: (i) the damages sought are indeterminate; (ii) the proceedings are in the early stages; (iii) the matters involve novel or unsettled legal theories or a large or uncertain number of actual or potential cases or parties; and/or (iv) discussions with the parties in matters that are expected ultimately to be resolved through negotiation and settlement have not reached the point where we believe a reasonable estimate of loss, or range of loss, can be made. In such instances, we believe that there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss or business impact, if any.

As of September 30, 2015 and December 31, 2014, our accrual for loss contingencies was $13.1 million and $12.3 million in the aggregate, respectively.

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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Common stock, shares outstanding	75,379,381
General Partners' Capital Account, Units Outstanding	75,379,381
Limited Partners' Capital Account, Units Outstanding	4,185,065
Parent Company [Member]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	75,379,381	75,267,675
Common stock, shares outstanding	75,379,381	75,267,675
Limited Partner [Member]
General Partners' Capital Account, Units Outstanding	75,379,381	75,267,675
Limited Partners' Capital Account, Units Outstanding	4,185,065	4,191,152

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MAALP Capital

9 Months Ended

Sep. 30, 2015

MAALP Capital [Abstract]

Consolidated Statements of Changes in Capital [Text Block]

MAALP Capital

Total capital and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per unit data):

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2014	$	161,310		$	2,890,858		$	(376	)	$	3,051,792
Net income	16,078			289,300						305,378
Other comprehensive loss - derivative instruments (cash flow hedges)							(6,222		)	(6,222		)
Issuance of units				326						326
Units repurchased and retired				(957		)				(957		)
Exercise of unit options				420						420
General partner units issued in exchange for limited partner units	(236		)	236						—
Redeemable units fair market value adjustment				(614		)				(614		)
Adjustment for limited partners' capital at redemption value	58			(58		)				—
Amortization of unearned compensation				4,950						4,950
Distributions ($2.31 per unit)	(9,671		)	(174,100		)				(183,771		)
CAPITAL BALANCE SEPTEMBER 30, 2015	$	167,539		$	3,010,361		$	(6,598	)	$	3,171,302

	Mid-America Apartments, L.P. Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2013	$	166,746		$	2,946,598		$	174	$	3,113,518
Net income	6,364			113,455					119,819
Other comprehensive income - derivative instruments (cash flow hedges)							303		303
Issuance of units				728					728
Units repurchased and retired				(456		)			(456		)
Exercise of unit options				11,916					11,916
General partner units issued in exchange for limited partner units	(992		)	992					—
Units issued in exchange for redeemable units				998					998
Redeemable units fair market value adjustment				(286		)			(286		)
Adjustment for limited partners capital at redemption value	28			(28		)			—
Amortization of unearned compensation				3,180					3,180
Distributions ($2.19 per unit)	(9,209		)	(164,598		)			(173,807		)
CAPITAL BALANCE SEPTEMBER 30, 2014	$	162,937		$	2,912,499		$	477	$	3,075,913

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MAA Equity

9 Months Ended

Sep. 30, 2015

MAA Equity [Abstract]

Consolidated Statements of Equity [Text Block]

MAA Equity

Total equity and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per share and per unit data):

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2014	$	752	$	3,619,270		$	(729,086	)	$	(412	)	$	161,287		$	3,051,811
Net income						289,300						16,078			305,378
Other comprehensive loss - derivative instruments (cash flow hedges)									(5,894		)	(328		)	(6,222		)
Issuance and registration of common shares	2		324												326
Shares repurchased and retired	—		(957		)										(957		)
Exercise of stock options	—		420												420
Shares issued in exchange for units	—		236									(236		)	—
Redeemable stock fair market value adjustment						(614		)							(614		)
Adjustment for noncontrolling interest ownership in operating partnership			(409		)							409			—
Amortization of unearned compensation			4,950												4,950
Dividends on common stock ($2.31 per share)						(174,100		)				—			(174,100		)
Dividends on noncontrolling interest units ($2.31 per unit)												(9,671		)	(9,671		)
EQUITY BALANCE SEPTEMBER 30, 2015	$	754	$	3,623,834		$	(614,500	)	$	(6,306	)	$	167,539		$	3,171,321

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2013	$	747	$	3,599,549		$	(653,593	)	$	108	$	166,726		$	3,113,537
Net income						113,455					6,364			119,819
Other comprehensive income - derivative instruments (cash flow hedges)									288		15			303
Issuance and registration of common shares	2		726											728
Shares repurchased and retired	—		(456		)									(456		)
Exercise of stock options	3		11,913											11,916
Shares issued in exchange for units	—		992								(992		)	—
Shares issued in exchange for redeemable stock			998											998
Redeemable stock fair market value adjustment						(286		)						(286		)
Adjustment for noncontrolling interest ownership in operating partnership			(55		)						55			—
Amortization of unearned compensation			3,180											3,180
Dividends on common stock ($2.19 per share)						(164,598		)			—			(164,598		)
Dividends on noncontrolling interest units ($2.19 per unit)											(9,209		)	(9,209		)
EQUITY BALANCE SEPTEMBER 30, 2014	$	752	$	3,616,847		$	(705,022	)	$	396	$	162,959		$	3,075,932

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Subsequent Events

9 Months Ended

Sep. 30, 2015

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Financings

On October 1, 2015, we paid off $184.9 million of senior unsecured notes upon maturity.

On October 2, 2015, we entered into a forward swap agreement with a notional value of $50 million related to debt that has not yet been issued.

On October 15, 2015, we closed on a new unsecured revolving credit facility, replacing the current credit facility. The new credit facility provides $750.0 million of borrowing capacity with an option to extend to $1.5 billion at the company's request. The new facility extends the maturity date of the credit facility to April 2020 with one 6-month extension option and bears interest at LIBOR plus a spread based on an investment ratings grid, which is currently 1.00%.

OnOctober 26, 2015, we amended the terms to one of the three existing terms loans; extending the maturity from 2017 to 2021 and reducing the interest rate from LIBOR plus a spread of 1.35% to LIBOR plus a spread of 1.10% based on an investment grade ratings grid.

Acquisition

On October 14, 2015, we purchased 4.4 acres of land at the Retreat at West Creek apartment community for approximately $3.0 million.

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Discontinued Operations

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Discontinued Operations

Discontinued Operations

In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. We adopted ASU 2014-08 during the period ending March 31, 2014. Due to the early adoption of ASU 2014-08, we did not classify Brookwood Mall, Colonial Village at North Arlington, Colonial Village at Vista Ridge, Greenbrook, Colonial Village at Inverness, Colonial Village at Charleston Place, Colonial Village at Huntleigh Woods, Colonial Village at Ashford Place, or Colonial Promenade Huntsville, which were sold during the year ended December 31, 2014, as discontinued operations. We also did not classify Vistas, Austin Chase, Fairways at Hartland, Fountain Lake, Post House Jackson, Post House North, Woodwinds, Oaks, Woods of Post House, Bradford Pointe, Huntington Chase, Westbury Creek, Colony at South Park, Paddock Park, Anatole, Bradford Chase, Sutton Place, Southland Station, Colonial Promenade Craft Farms, Colonial Grand Wilmington, Savannah Creek, or Whisperwood, which were sold during the nine months ended September 30, 2015, as discontinued operations.

As part of the merger with Colonial on October 1, 2013, we acquired the Nord du Lac commercial property. Starting on October 1, 2013, the criteria for classifying this property as Held for Sale were met and as a result the assets and liabilities for this property were presented as held for sale in the Condensed Consolidated Balance Sheets , and the results of operations were included within discontinued operations in the Condensed Consolidated Statement of Operations for all periods presented through the period ended March 31, 2015. Additionally, we ceased recording depreciation and amortization following the held for sale designation. On May 29, 2015, after several amendments to the original sale agreement extending the closing date, the buyer elected not to purchase the property and consequently, the Nord Du Lac Property no longer met the criteria to be classified as held for sale as of June 30, 2015. Approximately $34.1 million of real estate assets that were classified as held for sale as of March 31, 2015 was reclassified to held for use as of June 30, 2015, and included in the applicable line items in the accompanying Condensed Consolidated Balance Sheets. We measured the property to be reclassified at the lower of (1) its carrying value before being classified as held for sale, adjusted for any depreciation and amortization expense that would have been recognized had the asset been continuously classified as held for use or (2) its fair value at the date of the subsequent decision not to sell. As a result of this reclassification, we recorded an additional $2.3 million of depreciation and amortization expense during the three months ended June 30, 2015, which represents the depreciation and amortization expense on the Nord du Lac property that would have been recognized had the property been continuously classified as held for use. Additionally, the related results of operations previously recorded in discontinued operations have been included in the applicable line items of continuing operations in the accompanying Condensed Consolidated Statements of Operations for all periods presented, and thus are not presented in discontinued operations in the tables below.

Willow Creek, one of the properties that we sold during the nine months ended September 30, 2014, has been classified as discontinued operations in the Consolidated Statements of Operations. Willow Creek is included in discontinued operations because it was shown in discontinued operations as of December 31, 2013, and thus is not subject to ASU 2014-08.

The following is a summary of income from continuing and discontinued operations attributable to MAA and noncontrolling interest for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Income from continuing operations:
Attributable to MAA	$	91,734	$	67,079		$	289,300	$	108,420
Attributable to noncontrolling interest	5,094		3,748			16,078		6,080
Income from continuing operations	$	96,828	$	70,827		$	305,378	$	114,500
Income from discontinued operations:
Attributable to MAA	$	—	$	(103	)	$	—	$	5,035
Attributable to noncontrolling interest	—		(5		)	—		284
Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

The following is a summary of earnings from discontinued operations for MAA and MAALP for the three- and nine-month periods ended September 30, 2015 and 2014 (dollars in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2015		2014			2015		2014
Revenues
Rental revenues	$	—	$	—		$	—	$	76
Other revenues	—		—			—		10
Total revenues	$	—	$	—		$	—	$	86
Expenses
Property operating expenses	$	—	$	8		$	—	$	67
Depreciation and amortization	—		—			—		42
Interest expense and other	—		—			—		36
Total expense	$	—	$	8		$	—	$	145
Loss from discontinued operations before gain on sale	$	—	$	(8	)	$	—	$	(59	)
Net loss on insurance and other settlement proceeds on discontinued operations	—		3			—		—
Gain on sale of discontinued operations	—		(103		)	—		5,378
(Loss) Income from discontinued operations	$	—	$	(108	)	$	—	$	5,319

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Fair Value Disclosure of Financial Instruments

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Fair Value Disclosure of Financial Instruments

 Fair Value Disclosure of Financial Instruments

Cash and cash equivalents, restricted cash, accounts payable, accrued expenses and other liabilities and security deposits are carried at amounts that reasonably approximate their fair value due to their short term nature.

We apply Financial Accounting Standards Board, or FASB, Accounting Standards Codification, or ASC, 820 Fair Value Measurements and Disclosures, or ASC 820.ASC 820 defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.

ASC 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement.  Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability.  As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

Fixed rate notes payable at September 30, 2015 and December 31, 2014, totaled $2.42 billion and $2.50 billion, respectively, and had estimated fair values of $2.46 billion and $2.54 billion (excluding prepayment penalties), respectively, as of September 30, 2015 and December 31, 2014. The carrying value of variable rate notes payable (excluding the effect of interest rate swap and cap agreements) at September 30, 2015 and December 31, 2014, totaled $1.01 billion and $1.02 billion, respectively, and had estimated fair values of $0.99 billion and $0.97 billion (excluding prepayment penalties), respectively, as of September 30, 2015 and December 31, 2014. The valuation of our debt is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each debt instrument. This analysis reflects the contractual terms of the debt, and uses observable market-based inputs, including interest rate curves and credit spreads. The fair values of fixed debt are determined by using the present value of future cash outflows discounted with the applicable current market rate plus a credit spread. The fair values of variable debt are determined using the stated variable rate plus the current market credit spread. Our variable rates reset every 30 to 90 days and we conclude that these rates reasonably estimate current market rates. We have determined that inputs used to value our debt fall within Level 2 of the fair value hierarchy and therefore our fair market valuation of debt is considered Level 2 in the fair value hierarchy.

Currently, we use interest rate swaps and interest rate caps (options)to manage our interest raterisk. The valuation of these instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

The fair values of interest rate options are determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates rise above the strike rate of the caps. The variable interest rates used in the calculation of projected receipts on the cap are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities.

To comply with the provisions of ASC 820, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees. In conjunction with the FASB's fair value measurement guidance, we made an accounting policy election to measure the credit risk of our derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.

We have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, and as a result, all of our derivatives held as of September 30, 2015 and December 31, 2014 were classified as Level 2 of the fair value hierarchy.

The table below presents our assets and liabilities measured at fair value on a recurring basis as of September 30, 2015 and December 31, 2014, aggregated by the level in the fair value hierarchy within which those measurements fall.

Assets and Liabilities Measured at Fair Value on a Recurring Basis at September 30, 2015

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							September 30, 2015
Assets
Derivative financial instruments	$	—	$	6	$	—	$	6
Liabilities
Derivative financial instruments	$	—	$	17,953	$	—	$	17,953

Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2014

(dollars in thousands)

	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at
							December 31, 2014
Assets
Derivative financial instruments	$	—	$	78	$	—	$	78
Liabilities
Derivative financial instruments	$	—	$	13,392	$	—	$	13,392

The fair value estimates presented herein are based on information available to management as of September 30, 2015 and December 31, 2014.  These estimates are not necessarily indicative of the amounts we could ultimately realize.  See also discussions in Note 7 to the Condensed Consolidated Financial Statements.

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Borrowings

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Notes Payable

Borrowings

The weighted average interest rate at September 30, 2015 for the $3.43 billion of debt outstanding was 3.6%, compared to the weighted average interest rate of 3.7% on $3.52 billion of debt outstanding at December 31, 2014. Our debt consists of an unsecured credit facility, unsecured term loans, senior unsecured notes, a secured credit facility with Fannie Mae, and secured property mortgages. We utilize fixed rate borrowings, interest rate swaps, and interest rate caps to manage our current and future interest rate risk. More details on our borrowings can be found in the schedules presented later in this Report.

At September 30, 2015, we had $145.8 million (after considering the impact of interest rate swap and cap agreements in effect) of secured variable rate debt outstanding at an average interest rate of 0.8% and $125.0 million of capped secured variable rate debt at an average interest rate of 0.8%. The interest rate on all other secured debt, totaling $1.1 billion, was hedged or fixed at an average interest rate of 4.0%. Additionally, we had $1.9 billion of senior unsecured notes and term loans fixed at an average interest rate of 4.0% and a $500 million variable rate credit facility with an average interest rate of 1.3% with $184.0 million borrowed at September 30, 2015.

Unsecured Credit Facility

We maintain a $500.0 million unsecured credit facility with fourteen banks led by KeyBank National Association (the KeyBank Facility). The KeyBank Facility includes an expansion option up to $800.0 million. The KeyBank Facility bears an interest rate of LIBOR plus a spread of 0.90% to 1.70% based on an investment grade pricing grid and is currently bearing interest at 1.29%. This credit line expires in August 2017 with two six-month extension options. At September 30, 2015, we had $496.7 million total capacity under the KeyBank Facility with $184.0 million borrowed. Approximately $3.3 million of the KeyBank Facility is used to support letters of credit.

Unsecured Term Loans

We also maintain three term loans with a syndicate of banks, led by KeyBank, Wells Fargo, and US Bank, respectively. The KeyBank term loan has a balance of $150 million, matures in 2017, and has a variable interest rate of LIBOR plus a spread of 1.10% to 2.05% based on our credit ratings. The Wells Fargo term loan has a balance of $250 million and matures in 2018. The US Bank term loan has a balance of $150 million and matures in 2020. Both the Wells Fargo and US Bank term loans have variable interest rates of LIBOR plus a spread of 0.90% to 1.90% based on our credit ratings. As of September 30, 2015, the KeyBank term loan was bearing interest at a rate of LIBOR plus 1.35%. As of September 30, 2015, the Wells Fargo and US Bank term loans were bearing interest at a rate of LIBOR plus 1.15%.

Senior Unsecured Notes

We have also issued both public and private unsecured senior notes. As ofSeptember 30, 2015, we have approximately $1.0 billion of publicly issued bonds and $310.0 million of private placement notes. These senior unsecured notes are longer term in nature and usually mature within five to 12 years.

Secured Credit Facility

We also maintain a $360.0 million secured credit facility with Prudential Mortgage Capital, which is credit enhanced by Fannie Mae, or the Fannie Mae Facility, of which $320.8 million is collateralized and available to borrow. The Fannie Mae Facility provides for both fixed and variable rate borrowings and has Fannie Mae rate tranches with maturities from 2015 through 2018. The interest rate on the variable portion renews every 90 days and is based on the Fannie Mae discount mortgage backed security rate on the date of renewal, which, for us, has historically approximated three-month LIBOR less an average of 0.17% over the life of the Fannie Mae Facility, plus a fee of 0.62%. Borrowings under the Fannie Mae Facility totaled $320.8 million at September 30, 2015, consisting of $50.0 million under a fixed portion at a rate of 4.7%, and the remaining $270.8 million under the variable rate portion of the Fannie Mae Facility at an average rate of 0.8%. On February 17, 2015, we paid off $91.1 million related to a group of mortgages associated with a previous tax-free Fannie Mae Facility. As part of this transaction, we recorded a $3.1 million loss on debt extinguishment, primarily due to the write-off of unamortized financing costs associated with these mortgages.

Each of our credit facilities is subject to various covenants and conditions on usage, and the secured facility is subject to periodic re-evaluation of collateral. If we were to fail to satisfy a condition to borrowing or in the event of a reduction in real estate values, the available credit under one or more of the facilities could be reduced, which could adversely affect our liquidity. Moreover, if we were to fail to make a payment or violate a covenant under a credit facility, after applicable cure periods, one or more of our lenders could declare a default, accelerate the due date for repayment of all amounts outstanding and/or foreclose on properties securing such facilities. A default on an obligation to repay outstanding debt could also create a cross default on a separate piece of debt, whereby one or more of our lenders could accelerate the due date for repayment of all amounts outstanding and/or foreclose on properties securing the related facilities. Any such event could have a material adverse effect on the Company. We believe that we were in compliance with these covenants and conditions on usage at September 30, 2015.

Secured Property Mortgages

At September 30, 2015, we had $1.1 billion of fixed rate conventional property mortgages with an average interest rate of 3.9% and an average maturity in 2019.

On January 30, 2015, we paid off a $15.2 million mortgage associated with the Farmington Village apartment community. We recorded a $0.2 million loss on debt extinguishment due to paying off the mortgage prior to maturity.

On June 1, 2015, we paid off a $25.5 million mortgage associated with the Colonial Grand at Wilmington apartment community. The payoff was a scheduled maturity of the loan.

On June 15, 2015, we paid off a $10.1 million mortgage associated with the Reserve at Woodwind Lakes apartment community. The payoff was a scheduled maturity of the loan.

On September 1, 2015, we paid off a $11.6 million mortgage associated with the Colonial Village at Timber Crest apartment community. The payoff was a scheduled maturity of the loan.

On September 30, 2015, we paid off a $23.5 million mortgage associated with the Sanctuary at Oglethorpe apartment community. The payoff was a scheduled maturity of the loan.

In addition to these payoffs, we have paid $6.3 million associated with property mortgage principal amortizations.

Guarantees

Of the debt mentioned above, MAA fully and unconditionally guarantees the following debt incurred by MAALP for the full terms of the respective instruments:

• $360.0 million of the Fannie Mae Facilities, of which $320.8 million has been borrowed as of September 30, 2015;

• $500.0 million KeyBank credit facility, of which $184.0 million has been borrowed as of September 30, 2015;

• $310.0 million of senior unsecured notes, all of which has been borrowed as of September 30, 2015; and

• $550.0 million of term loans, all of which has been borrowed as of September 30, 2015.

Borrowings Overview

The following table summarizes our outstanding debt structure as of September 30, 2015 (dollars in thousands):

	Borrowed Balance		Effective Rate		Average Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	1,052,869	3.9	%	7/10/2019
Fannie Mae Facility	50,000		4.7	%	3/31/2017
Total fixed rate secured debt	$	1,102,869	3.9	%	6/2/2019
Variable Rate Secured Debt (1)
Fannie Mae Facility	270,785		0.8	%	2/18/2017
Total variable rate secured debt	$	270,785	0.8	%	2/18/2017
Total Secured Debt	$	1,373,654	3.3	%	12/20/2018
Unsecured Debt
Variable rate credit facility	$	184,000	1.3	%	8/7/2017
Term loans fixed with swaps	550,000		3.1	%	11/10/2017
Fixed rate senior bonds	1,317,481		4.5	%	12/4/2021
Total Unsecured Debt	$	2,051,481	3.8	%	6/12/2020
Total Outstanding Debt	$	3,425,135	3.6	%	9/18/2019

⁽¹⁾ Includes capped balances.

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Derivatives and Hedging Activities

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Derivatives and Hedging Activities

Derivatives and Hedging Activities

Risk Management Objective of Using Derivatives

We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of our debt funding and the use of derivative financial instruments. Specifically, we enter into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future contractual and forecasted cash amounts, principally related to our borrowings, the value of which are determined by changing interest rates, related cash flows and other factors.

Cash Flow Hedges of Interest Rate Risk

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish these objectives, we use interest rate swaps and interest rate caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps designated as cash flow hedges involve the receipt of variable amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an up-front premium.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the three and nine months ended September 30, 2015 and 2014, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt and forecasted issuances of fixed-rate debt.  The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings.

During the three months ended September 30, 2015 and 2014, we recorded ineffectiveness of $44,000 (increase to interest expense) and $25,000 (increase to interest expense), respectively, and during the nine months ended September 30, 2015 and 2014, we recorded ineffectiveness of $117,000 (increase to interest expense) and $88,000 (increase to interest expense), respectively, mainly attributable to a mismatch in the underlying indices of the derivatives and the hedged interest payments made on our variable-rate debt and due to the designation of acquired interest rate swaps with a non-zero fair value at inception.

Amounts reported in accumulated other comprehensive income related to derivatives designated as qualifying cash flow hedges will be reclassified to interest expense as interest payments are made on our variable-rate or fixed-rate debt. During the next 12 months, we estimate that an additional $5.0 million will be reclassified to earnings as an increase to interest expense, which primarily represents the difference between our fixed interest rate swap payments and the projected variable interest rate swap payments.

As of September 30, 2015, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	5	$	125,000,000
Interest Rate Swaps(1)	7	$	550,000,000

⁽¹⁾ Excludes three forward rate swaps totaling $150 million where the debt has not yet been issued. These swaps are not included in our debt discussion in Note 6 or Management's Discussion and Analysis.

Tabular Disclosure of Fair Values of Derivative Instruments on the Balance Sheets

The table below presents the fair value of our derivative financial instruments as well as their classification on the Condensed Consolidated Balance Sheet as of September 30, 2015 and December 31, 2014.

Fair Values of Derivative Instruments on the Condensed Consolidated Balance Sheets as of September 30, 2015 and

December 31, 2014 (dollars in thousands)

	Asset Derivatives					Liability Derivatives
		September 30, 2015		December 31, 2014			September 30, 2015		December 31, 2014
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	6	$	72	Fair market value of interest rate swaps	$	17,953	$	13,392
Total derivatives designated as hedging instruments		$	6	$	72		$	17,953	$	13,392
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	—	$	6		$	—	$	—
Total derivatives not designated as hedging instruments		$	—	$	6		$	—	$	—

Tabular Disclosure of the Effect of Derivative Instruments on the Statements of Operations

The table below presents the effect of our derivative financial instruments on the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2015 and 2014.

Effect of Derivative Instruments on the Condensed Consolidated Statements of Operations for the

Three and nine months ended September 30, 2015 and 2014 (dollars in thousands)

Derivatives in Cash Flow Hedging Relationships	Amount of  Gain or (Loss) Recognized in  OCI on Derivative  (Effective Portion)						Location of Gain or (Loss) Reclassified  from Accumulated OCI into Income (Effective Portion)	Amount of   Gain or (Loss) Reclassified from Accumulated  OCI into Income  (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Three months ended September 30,	2015			2014				2015			2014				2015			2014
Interest rate contracts	$	(9,269	)	$	(696	)	Interest expense	$	(1,607	)	$	(2,589	)	Interest expense	$	(44	)	$	(25	)
Total derivatives in cash flow hedging relationships	$	(9,269	)	$	(696	)		$	(1,607	)	$	(2,589	)		$	(44	)	$	(25	)
Nine months ended September 30,
Interest rate contracts	$	(11,812	)	$	(9,096	)	Interest expense	$	(5,590	)	$	(9,399	)	Interest expense	$	(117	)	$	(88	)
Total derivatives in cash flow hedging relationships	$	(11,812	)	$	(9,096	)		$	(5,590	)	$	(9,399	)		$	(117	)	$	(88	)
Derivatives Not Designated as Hedging Instruments
Three months ended September 30,														Location of Gain or (Loss) Recognized in Income	2015			2014
Interest rate contracts														Interest expense	$	—		$	(10	)
Total															$	—		$	(10	)
Nine months ended September 30,
Interest rate contracts														Interest expense	$	(3	)	$	(138	)
Total															$	(3	)	$	(138	)

Credit-Risk-Related Contingent Features

As of September 30, 2015, derivatives that were in a net liability position and subject to credit-risk-related contingent features had a termination value of $18.9 million, which includes accrued interest but excludes any adjustment for nonperformance risk. These derivatives had a fair value, gross of asset positions, of $18.0 million at September 30, 2015.

Certain of our derivative contracts contain a provision where we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness. As of September 30, 2015, we had not breached the provisions of these agreements. If we had breached these provisions, we could have been required to settle our obligations under the agreements at the termination value of $18.9 million.

Although our derivative contracts are subject to master netting arrangements, which serve as credit mitigants to both us and our counterparties under certain situations, we do not net our derivative fair values or any existing rights or obligations to cash collateral on the Condensed Consolidated Balance Sheets.

The table below presents a gross presentation, the effects of offsetting, and a net presentation of our derivatives as of September 30, 2015 and December 31, 2014. The net amounts of derivative assets or liabilities can be reconciled to the Tabular Disclosure of Fair Values of Derivative Instruments above, which also provides the location that derivative assets and liabilities are presented on the Condensed Consolidated Balance Sheets (dollars in thousands):

Offsetting of Derivative Assets
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	6	$	—	$	6	$	—	$	—	$	6
Offsetting of Derivative Liabilities
As of September 30, 2015
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	17,953	$	—	$	17,953	$	—	$	—	$	17,953
Offsetting of Derivative Assets
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Received		Net Amount
Derivatives	$	78	$	—	$	78	$	—	$	—	$	78
Offsetting of Derivative Liabilities
As of December 31, 2014
							Gross Amounts Not Offset in the Statement of Financial Position
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Liabilities presented in the Statement of Financial Position		Financial Instruments		Cash Collateral Posted		Net Amount
Derivatives	$	13,392	$	—	$	13,392	$	—	$	—	$	13,392

Other Comprehensive Income

Our other comprehensive income consists entirely of gains and losses attributable to the effective portion of our cash flow hedges. The chart below shows the change in the balance for the nine months ended September 30, 2015 and 2014 (dollars in thousands):

Changes in Accumulated Other Comprehensive Income by Component
	Affected Line Item in the Consolidated Statements Of Operations	Gains and Losses on Cash Flow Hedges
		for the nine months ended September 30,
		2015			2014
Beginning balance		$	(412	)	$	108
Other comprehensive loss before reclassifications		(11,812		)	(9,096		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	5,590			9,399
Net current-period other comprehensive loss (income) attributable to noncontrolling interest		328			(15		)
Net current-period other comprehensive (loss) income attributable to MAA		(5,894		)	288
Ending balance		$	(6,306	)	$	396

See also discussions in Note 8 to the Condensed Consolidated Financial Statements.

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Shareholders' Equity of MAA

9 Months Ended

Sep. 30, 2015

Shareholders' Equity of MAA [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Shareholders' Equity of MAA

On September 30, 2015, 75,379,381 shares of common stock of MAA and 4,185,065 OP Units were issued and outstanding, representing a total of 79,564,446 shares and units. At September 30, 2014, 75,242,266 shares of common stock of MAA and 4,202,123 OP Units were outstanding, representing a total of 79,444,389 shares and units. There were 58,112 outstanding options as of September 30, 2015 compared to 81,654 outstanding options as of September 30, 2014.

During the nine months ended September 30, 2015, 11,914 shares of our 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, 2014, 9,292 shares were acquired for these purposes.

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, 2014, we issued 263,259 shares related to the exercise of stock options. These exercises resulted in proceeds of $11.9 million.

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Consolidation and Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) ft² in Thousands, $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) ft² Property apartmentunits States Communities shares	Sep. 30, 2015 USD ($) ft² Property apartmentunits States Communities shares	Sep. 30, 2014 shares	Dec. 31, 2014 USD ($)
Real Estate Properties [Line Items]
General Partners' Capital Account, Units Outstanding | shares	75,379,381	75,379,381	75,242,266
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest		94.70%	94.70%
Number of owned or owned interests of apartment communities	253	253
Number of apartments included in a community | apartmentunits	79,024	79,024
Number of states in which apartment units are located | States	15	15
Percentage Of Ownership Interests	100.00%	100.00%
Maximum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests	100.00%	100.00%
Development Properties [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities | Communities	4	4
Number of apartments included in a community	232	232
Number of units under development community	806	806
Development Properties [Member] | Expected Costs [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress | $	$ 119.5	$ 119.5
Development Properties [Member] | Costs Incurred to Date [Member]
Real Estate Properties [Line Items]
Development and capital improvements in progress | $	$ 65.5	$ 65.5
Retail
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities	5	5
Square Footage of Real Estate Property | ft²	163	163
Commercial Real Estate [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities	1	1
Square Footage of Real Estate Property | ft²	196	196
Partially Owned Properties [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities	1	1
Square Footage of Real Estate Property | ft²	30	30
Building Repairs and Maintenance Expenses [Member]
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment | $	$ 0.3	$ 1.0
Utilities Expenses [Member]
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment | $	$ 8.6	25.4
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Prior Period Reclassification Adjustment | $		$ 34.1		$ 36.5

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Partners' Capital of Mid-America Apartments, L.P. (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Schedule of Capital Structure [Line Items]
Operating partnership units outstanding	79,564,446	79,444,389
General Partners' Capital Account, Units Outstanding	75,379,381	75,242,266
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	94.70%	94.70%
Limited Partners' Capital Account, Units Outstanding	4,185,065	4,202,123
Noncontrolling Interest [Member]
Schedule of Capital Structure [Line Items]
Common Shares Issuable Upon Conversion Of Convertible Stock	4,185,065	4,202,123
Limited Partners' Capital Account	$ 342.6	$ 275.9
Redeemable Capital Shares Par Or Stated Value Per Share	$ 81.87	$ 65.65

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Real Estate Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Real Estate Acquisitions and Dispositions

 Real Estate Acquisitions and Dispositions

The following chart shows our acquisition activity for the nine months ended September 30, 2015:

Communities	Locations	Units (unless noted)	Dates Acquired
River's Walk (4 outparcels)	Charleston, South Carolina	2.5 acres	Q1/Q2 2015 - various
Residences at Burlington Creek	Kansas City, Missouri	298	January 15, 2015
SkySong	Scottsdale, Arizona	325	June 11, 2015
Retreat at West Creek	Richmond, Virginia	254	June 15, 2015
Radius	Newport News, Virginia	252	July 28, 2015
Haven at Prairie Trace	Overland Park, Kansas	280	July 30, 2015

The following chart shows our disposition activity for the nine months ended September 30, 2015:

Communities	Locations	Units (unless noted)	Dates Sold
Vistas	Macon, Georgia	144	February 26, 2015
Austin Chase	Macon, Georgia	256	February 26, 2015
Fairways at Hartland	Bowling Green, Kentucky	240	February 26, 2015
Fountain Lake	Brunswick, Georgia	113	March 25, 2015
Westbury Creek	Augusta, Georgia	120	April 1, 2015
Woodwinds	Aiken, South Carolina	144	April 1, 2015
Colony at South Park	Aiken, South Carolina	184	April 1, 2015
Bradford Pointe	Augusta, Georgia	192	April 1, 2015
Colonial Promenade Craft Farms	Gulf Shores, Alabama	67,735 sq. ft	April 28, 2015
Colonial Promenade Craft Farms outparcel	Gulf Shores, Alabama	0.23 acres	April 28, 2015
Anatole	Daytona Beach, Florida	208	April 29, 2015
Oaks	Jackson, Tennessee	100	April 29, 2015
Post House Jackson	Jackson, Tennessee	150	April 29, 2015
Woods of Post House	Jackson, Tennessee	122	April 29, 2015
Post House North	Jackson, Tennessee	145	April 29, 2015
Bradford Chase	Jackson, Tennessee	148	April 29, 2015
Sutton Place	Memphis, Tennessee MSA	253	April 29, 2015
Southland Station	Warner Robins, Georgia	304	April 29, 2015
Huntington Chase	Warner Robins, Georgia	200	April 29, 2015
Paddock Park	Ocala, Florida	480	April 29, 2015
Colonial Grand Wilmington	Wilmington, North Carolina	390	July 1, 2015
Savannah Creek	Memphis, Tennessee MSA	204	July 1, 2015
Whisperwood	Columbus, Georgia	1,008	July 1, 2015

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Earnings Per OP Unit of MAALP (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per OP Unit of MAALP [Abstract]

Schedule of Earnings Per Unit, Basic and Diluted [Table Text Block]

Basic earnings per OP Unit is computed by dividing net income available for common unitholders by the weighted average number of units outstanding during the period. All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common unitholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per OP unit. Diluted earnings per OP Unit reflects the potential dilution that could occur if securities or other contracts to issue OP Units were exercised or converted into OP Units. A reconciliation of the numerators and denominators of the basic and diluted earnings per unit computations for the three and nine months ended September 30, 2015 and 2014 is presented below:

(dollars and units in thousands, except per unit amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Units Outstanding
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Effect of dilutive securities	—			(1)	—			(1)	—			(1)	—			(1)
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Calculation of Earnings per Unit - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Earnings per unit - basic:	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Unit - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)	(1)	(131		)	(1)	(668		)	(1)	(212		)	(1)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(1)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Earnings per unit - diluted:	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments - assets	$ 6	$ 78
Derivative financial instruments - liabilities	17,953	13,392
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments - assets	0	0
Derivative financial instruments - liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments - assets	6	78
Derivative financial instruments - liabilities	17,953	13,392
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative financial instruments - assets	0	0
Derivative financial instruments - liabilities	$ 0	$ 0

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Notes Payable - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Notes Payable	$ 3,425,135	$ 3,520,000
Debt Instrument, Interest Rate, Effective Percentage	3.60%	3.70%
Conventional Variable Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.80%
Long-term Debt	$ 145,800
Capped Conventional Variable Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.80%
Long-term Debt	$ 125,000
Mortgages [Member]
Debt Instrument [Line Items]
Repayments of Notes Payable	(6,300)
Other Than Conventional Variable Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 1,100,000
Debt Instrument Average Interest Rate	4.00%
Fixed Rate Senior Notes [Member]
Debt Instrument [Line Items]
Unsecured notes payable	$ 1,900,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	4.00%
Secured Debt [Member]
Debt Instrument [Line Items]
Notes Payable	$ 1,373,654
Debt Instrument, Interest Rate, Effective Percentage	3.30%
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.17%
Line of Credit Facility, Commitment Fee Percentage	0.62%
Line of Credit Facility, Amount Outstanding	$ 320,800
Line of Credit Facility, Maximum Borrowing Capacity	$ 360,000
Debt Renewal Period	90 days
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.80%
Line of Credit Facility, Amount Outstanding	$ 270,800
Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.70%
Line of Credit Facility, Amount Outstanding	$ 50,000
Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Loss on debt extinguishment	$ 200
Secured Debt [Member] | Mortgages [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.90%
Mortgage Loans on Real Estate	$ 1,052,869
Unsecured Debt [Member]
Debt Instrument [Line Items]
Notes Payable	$ 2,051,481
Debt Instrument, Interest Rate, Effective Percentage	3.80%
Unsecured Debt [Member] | Wells Fargo Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000
Unsecured Debt [Member] | US Bank Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 150,000
Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.29%
Line of Credit Facility, Amount Outstanding	$ 184,000
Letters of Credit Outstanding, Amount	3,300
Line of Credit Facility, Maximum Borrowing Capacity	500,000
Line of Credit Facility, Current Borrowing Capacity	$ 496,700
Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.30%
Line of Credit Facility, Amount Outstanding	$ 184,000
Unsecured Debt [Member] | KeyBank Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 150,000
Debt Instrument, Interest Rate, Effective Percentage	1.35%
Unsecured Debt [Member] | Wells Fargo and US Bank Term Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.15%
Unsecured Debt [Member] | Public Income Notes [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000,000
Unsecured Debt [Member] | Private Placement [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	310,000
Unsecured Debt [Member] | 2011 and 2012 Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	310,000
Unsecured Debt [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 550,000
Debt Instrument, Interest Rate, Effective Percentage	3.10%
Minimum [Member] | Unsecured Debt [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Maturity Date, Description	P5Y
Minimum [Member] | Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.90%
Minimum [Member] | Unsecured Debt [Member] | KeyBank Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.10%
Minimum [Member] | Unsecured Debt [Member] | Wells Fargo and US Bank Term Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.90%
Maximum [Member] | Unsecured Debt [Member] | Fixed Rate Debt
Debt Instrument [Line Items]
Debt Instrument, Maturity Date, Description	P12Y
Maximum [Member] | Unsecured Debt [Member] | $500 million unsecured revolving credit faciltiy [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.70%
Line of Credit Facility, Maximum Borrowing Capacity	$ 800,000
Maximum [Member] | Unsecured Debt [Member] | KeyBank Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.05%
Maximum [Member] | Unsecured Debt [Member] | Wells Fargo and US Bank Term Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.90%
Tax Free Credit Facility [Member] | Secured Debt [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 91,100
Loss on debt extinguishment	3,100
Farmington Village [Member] | Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	15,200
Colonial Grand at Wilmington [Member] | Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	25,500
Reserve At Woodwind Lakes [Member] | Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	10,100
Colonial Village at Timber Crest [Member] | Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	11,600
Sanctuary At Oglethorpe [Member] | Secured Debt [Member] | Mortgages [Member] | Variable Rate Debt [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 23,500

XML

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Parent Company [Member]
Operating revenues:
Rental revenues	$ 239,670	$ 226,584	$ 710,775	$ 671,695
Other property revenues	22,328	22,979	68,666	67,264
Total property revenues	261,998	249,563	779,441	738,959
Management fee income	0	11	0	154
Total operating revenues	261,998	249,574	779,441	739,113
Property operating expenses:
Personnel	26,500	26,363	78,033	76,481
Building repairs and maintenance	8,793	9,056	23,195	23,354
Real estate taxes and insurance	31,699	31,025	97,824	93,128
Utilities	23,769	23,535	67,442	66,985
Landscaping	3,900	4,068	15,032	15,557
Other operating	6,938	6,835	21,577	20,903
Depreciation and amortization	73,098	70,222	220,606	229,866
Total property operating expenses	174,697	171,104	523,709	526,274
Acquisition expense	656	13	2,155	971
Property management expenses	7,628	7,429	23,106	24,019
General and administrative expenses	5,879	6,511	19,103	16,065
Merger related expenses	0	331	0	3,202
Integration related expenses	0	147	0	7,140
Income from continuing operations before non-operating items	73,138	64,039	211,368	161,442
Interest and other non-property (expense) income	(179)	37	(359)	1,077
Interest expense	(29,342)	(28,251)	(88,801)	(89,090)
Loss on debt extinguishment	(5)	(2,586)	(3,384)	(2,586)
Amortization of deferred financing costs	(887)	(1,000)	(2,710)	(3,485)
Net casualty loss after insurance and other settlement proceeds	(5)	(126)	485	(431)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621	36,032	190,031	42,254
Gain on sale of non-depreciable real estate assets	0	0	172	535
Income before income tax expense	97,341	68,145	306,802	109,716
Income tax expense	(512)	(442)	(1,419)	(1,235)
Income from continuing operations before joint venture activity	96,829	67,703	305,383	108,481
Gain (loss) from real estate joint ventures	(1)	3,124	(5)	6,019
Income from continuing operations	96,828	70,827	305,378	114,500
Discontinued operations:
Income from discontinued operations before gain on sale	0	(8)	0	(59)
Loss from Insurance Settlement and Other, Discontinued Operations	0	3	0	0
Gain on sale of discontinued operations	0	(103)	0	5,378
Consolidated net income	96,828	70,719	305,378	119,819
Net income attributable to noncontrolling interests	5,094	3,743	16,078	6,364
Net income available for MAA common shareholders	$ 91,734	$ 66,976	$ 289,300	$ 113,455
Earnings per common share - basic:
Income from continuing operations available for common shareholders	$ 1.22	$ 0.89	$ 3.84	$ 1.44
Discontinued property operations	0.00	0.00	0.00	0.07
Net income available for common shareholders	1.22	0.89	3.84	1.51
Earnings per common share - diluted:
Income from continuing operations available for common shareholders	1.22	0.89	3.84	1.44
Discontinued property operations	0.00	0.00	0.00	0.07
Net income available for common shareholders	1.22	0.89	3.84	1.51
Dividends declared per common share	$ 0.77	$ 0.73	2.31	2.19
Distribution Made to Limited Partner, Distributions Declared, Per Unit			$ 2.31	$ 2.19
Limited Partner [Member]
Operating revenues:
Rental revenues	$ 239,670	$ 226,584	$ 710,775	$ 671,695
Other property revenues	22,328	22,979	68,666	67,264
Total property revenues	261,998	249,563	779,441	738,959
Management fee income	0	11	0	154
Total operating revenues	261,998	249,574	779,441	739,113
Property operating expenses:
Personnel	26,500	26,363	78,033	76,481
Building repairs and maintenance	8,793	9,056	23,195	23,354
Real estate taxes and insurance	31,699	31,025	97,824	93,128
Utilities	23,769	23,535	67,442	66,985
Landscaping	3,900	4,068	15,032	15,557
Other operating	6,938	6,835	21,577	20,903
Depreciation and amortization	73,098	70,222	220,606	229,866
Total property operating expenses	174,697	171,104	523,709	526,274
Acquisition expense	656	13	2,155	971
Property management expenses	7,628	7,429	23,106	24,019
General and administrative expenses	5,879	6,511	19,103	16,065
Merger related expenses	0	331	0	3,202
Integration related expenses	0	147	0	7,140
Income from continuing operations before non-operating items	73,138	64,039	211,368	161,442
Interest and other non-property (expense) income	(179)	37	(359)	1,077
Interest expense	(29,342)	(28,251)	(88,801)	(89,090)
Loss on debt extinguishment	(5)	(2,586)	(3,384)	(2,586)
Amortization of deferred financing costs	(887)	(1,000)	(2,710)	(3,485)
Net casualty loss after insurance and other settlement proceeds	(5)	(126)	485	(431)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621	36,032	190,031	42,254
Gain on sale of non-depreciable real estate assets	0	0	172	535
Income before income tax expense	97,341	68,145	306,802	109,716
Income tax expense	(512)	(442)	(1,419)	(1,235)
Income from continuing operations before joint venture activity	96,829	67,703	305,383	108,481
Gain (loss) from real estate joint ventures	(1)	3,124	(5)	6,019
Income from continuing operations	96,828	70,827	305,378	114,500
Discontinued operations:
Income from discontinued operations before gain on sale	0	(8)	0	(59)
Loss from Insurance Settlement and Other, Discontinued Operations	0	3	0	0
Gain on sale of discontinued operations	0	(103)	0	5,378
Consolidated net income	96,828	70,719	305,378	119,819
Net income available for Mid-America Apartments, L.P. common unitholders	$ 96,828	$ 70,719	$ 305,378	$ 119,819
Earnings per common share - basic:
Income from continuing operations available for common shareholders	$ 1.22	$ 0.89	$ 3.84	$ 1.44
Discontinued property operations	0.00	0.00	0.00	0.07
Net income available for common shareholders	1.22	0.89	3.84	1.51
Earnings per common share - diluted:
Income from continuing operations available for common shareholders	1.22	0.89	3.84	1.44
Discontinued property operations	0.00	0.00	0.00	0.07
Net income available for common shareholders	1.22	0.89	3.84	1.51
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$ 0.77	$ 0.73	$ 2.31	$ 2.19

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Earnings Per OP Unit of MAALP

9 Months Ended

Sep. 30, 2015

Earnings Per OP Unit of MAALP [Abstract]

Earnings Per Unit [Text Block]

Earnings per OP Unit of MAALP

Basic earnings per OP Unit is computed by dividing net income available for common unitholders by the weighted average number of units outstanding during the period. All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common unitholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per OP unit. Diluted earnings per OP Unit reflects the potential dilution that could occur if securities or other contracts to issue OP Units were exercised or converted into OP Units. A reconciliation of the numerators and denominators of the basic and diluted earnings per unit computations for the three and nine months ended September 30, 2015 and 2014 is presented below:

(dollars and units in thousands, except per unit amounts)	Three months ended September 30,								Nine months ended September 30,
	2015				2014				2015				2014
Units Outstanding
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Effect of dilutive securities	—			(1)	—			(1)	—			(1)	—			(1)
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Calculation of Earnings per Unit - basic
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)		(131		)		(668		)		(212		)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - basic	79,374				79,263				79,356				79,148
Earnings per unit - basic:	$	1.22			$	0.89			$	3.84			$	1.51
Calculation of Earnings per Unit - diluted
Income from continuing operations	$	96,828			$	70,827			$	305,378			$	114,500
Income from continuing operations allocated to unvested restricted shares	(221		)	(1)	(131		)	(1)	(668		)	(1)	(212		)	(1)
Income from continuing operations available for common unitholders, adjusted	$	96,607			$	70,696			$	304,710			$	114,288
Income from discontinued operations	$	—			$	(108	)		$	—			$	5,319
Income from discontinued operations allocated to unvested restricted shares	—				—				—				(10		)	(1)
Income from discontinued operations available for common unitholders, adjusted	$	—			$	(108	)		$	—			$	5,309
Weighted average OP Units - diluted	79,374				79,263				79,356				79,148
Earnings per unit - diluted:	$	1.22			$	0.89			$	3.84			$	1.51

⁽¹⁾ For the three and nine months ended September 30, 2015 and September 30, 2014, 0.2 million and 0.1 million, respectively, potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

XML

Real Estate Acquisitions and Dispositions - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015 ft² a apartmentunits Communities Apartments	Oct. 14, 2015 a
Business Acquisitions and Dispositions [Line Items]
Number Of Properties Sold | Communities	1
Number of Units in Real Estate Property | apartmentunits	79,024
Colonial Promenade Craft Farms [Member]
Business Acquisitions and Dispositions [Line Items]
Square Footage of Real Estate Property | ft²	67,735
Area of Land | a	0.23
River's Walk [Member]
Business Acquisitions and Dispositions [Line Items]
Area of Land | a	2.5
Residences at Burlington Creek [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	298
Vistas [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	144
Austin Chase [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	256
Fairways At Hartland [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	240
Fountain Lake [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	113
Westbury Creek [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	120
Woodwinds [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	144
Colony At South Park [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	184
Bradford Pointe [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	192
Anatole [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	208
Oaks [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	100
Post House Jackson [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	150
Woods of Post House [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	122
Post House North [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	145
Bradford Chase [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	148
Sutton Place [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	253
Southland Station [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	304
Huntington Chase [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	200
SkySong [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	325
Retreat at West Creek [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	254
Paddock Park Ocala [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	480
Colonial Grand at Wilmington [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	390
Savannah Creek [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	204
Radius [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	252
Haven at Prairie Trace [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	280
Whisperwood [Member]
Business Acquisitions and Dispositions [Line Items]
Number of Units in Real Estate Property	1,008
Subsequent Event [Member] | Retreat at West Creek [Member]
Business Acquisitions and Dispositions [Line Items]
Area of Land | a		4.4

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MAA Equity (Tables)

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

MAA Equity [Abstract]

Shareholders' Equity [Table Text Block]

Total equity and its components for the nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands, except per share and per unit data):

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2014	$	752	$	3,619,270		$	(729,086	)	$	(412	)	$	161,287		$	3,051,811
Net income						289,300						16,078			305,378
Other comprehensive loss - derivative instruments (cash flow hedges)									(5,894		)	(328		)	(6,222		)
Issuance and registration of common shares	2		324												326
Shares repurchased and retired	—		(957		)										(957		)
Exercise of stock options	—		420												420
Shares issued in exchange for units	—		236									(236		)	—
Redeemable stock fair market value adjustment						(614		)							(614		)
Adjustment for noncontrolling interest ownership in operating partnership			(409		)							409			—
Amortization of unearned compensation			4,950												4,950
Dividends on common stock ($2.31 per share)						(174,100		)				—			(174,100		)
Dividends on noncontrolling interest units ($2.31 per unit)												(9,671		)	(9,671		)
EQUITY BALANCE SEPTEMBER 30, 2015	$	754	$	3,623,834		$	(614,500	)	$	(6,306	)	$	167,539		$	3,171,321

	Mid-America Apartment Communities, Inc. Shareholders' Equity
	Common Stock Amount		Additional Paid-In Capital			Accumulated Distributions in Excess of Net Income			Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest			Total Equity
EQUITY BALANCE DECEMBER 31, 2013	$	747	$	3,599,549		$	(653,593	)	$	108	$	166,726		$	3,113,537
Net income						113,455					6,364			119,819
Other comprehensive income - derivative instruments (cash flow hedges)									288		15			303
Issuance and registration of common shares	2		726											728
Shares repurchased and retired	—		(456		)									(456		)
Exercise of stock options	3		11,913											11,916
Shares issued in exchange for units	—		992								(992		)	—
Shares issued in exchange for redeemable stock			998											998
Redeemable stock fair market value adjustment						(286		)						(286		)
Adjustment for noncontrolling interest ownership in operating partnership			(55		)						55			—
Amortization of unearned compensation			3,180											3,180
Dividends on common stock ($2.19 per share)						(164,598		)			—			(164,598		)
Dividends on noncontrolling interest units ($2.19 per unit)											(9,209		)	(9,209		)
EQUITY BALANCE SEPTEMBER 30, 2014	$	752	$	3,616,847		$	(705,022	)	$	396	$	162,959		$	3,075,932

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MAA Equity Parenthetical (Details) - Parent Company [Member] - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Disclosure [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.77	$ 0.73	$ 2.31	$ 2.19
Distribution Made to Limited Partner, Distributions Declared, Per Unit			$ 2.31	$ 2.19

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Segment Information

9 Months Ended

Sep. 30, 2015

Notes To Financial Statements [Abstract]

Segment Information

Segment Information

As of September 30, 2015, we owned or had an ownership interest in 253 multifamily apartment communities in 15 different states from which we derived all significant sources of earnings and operating cash flows. Senior management evaluates performance and determines resource allocations by reviewing apartment communities individually and in the following reportable operating segments:

• Large market same store communities are generally communities:

◦ in markets with a population of at least 1 million and at least 1% of the total public multifamily REIT units; and

◦ that we have owned and have been stabilized for at least a full 12 months and have not been classified as held for sale.

• Secondary market same store communities are generally communities:

◦ in markets with populations of more than 1 million but less than 1% of the total public multifamily REIT units or in markets with a population of less than 1 million; and

◦ that we have owned and have been stabilized for at least a full 12 months and have not been classified as held for sale.

• Non same store communities and other includes recent acquisitions, communities in development or lease-up, communities that have been identified for disposition, and communities that have undergone a significant casualty loss. Also included in non same store communities are non multifamily activities, which represent less than 1% of our portfolio.

On the first day of each calendar year, we determine the composition of our same store operating segments for that year as well as adjust the previous year, which allows us to evaluate full period-over-period operating comparisons.  Properties in development or lease-up will be added to the same store portfolio on the first day of the calendar year after they have been owned and stabilized for at least a full 12 months. Communities are considered stabilized after achieving 90% occupancy for 90 days. Communities that have been identified for disposition are excluded from our same store portfolio.

We utilize net operating income, or NOI, a non-GAAP financial measure, in evaluating the performance of the segments.  Total NOI represents total property revenues, the most directly comparable GAAP financial measure, less total property operating expenses, excluding depreciation and amortization, for all properties held during the period regardless of their status as held for sale. We believe NOI is a helpful tool in evaluating the operating performance of our segments because it measures the core operations of property performance by excluding corporate level expenses and other items not related to property operating performance.

A redevelopment community is a community with a specific plan in place to upgrade at least half of the community's units over a period of time with new finishes, fixtures, and appliances, among other upgrades.  These plans include spending a pre-defined amount of capital per unit to achieve a rent increase as a result of the upgrades.  We separately identify redevelopment communities that would cause a material distortion of normal same store operating results; however, currently there are no communities separately identified. Routine renovations occur at a property as items need to be replaced as a normal part of operations and is done with an expectation to maintain the current level of quality at the property. There is no specified plan in place for routine renovations.

Revenues and NOI for each reportable segment for the three- and nine-month periods ended September 30, 2015 and 2014 were as follows (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2015			2014			2015			2014
Revenues
Large Market Same Store	$	149,642		$	140,452		$	438,184		$	411,851
Secondary Market Same Store	82,494			78,413			242,908			231,852
Non-Same Store and Other	29,862			30,698			98,349			95,256
Total property revenues	261,998			249,563			779,441			738,959
Management fee income	—			11			—			154
Total operating revenues	$	261,998		$	249,574		$	779,441		$	739,113
NOI
Large Market Same Store	$	91,237		$	84,084		$	266,941		$	247,256
Secondary Market Same Store	50,864			47,365			149,800			141,731
Non-Same Store and Other	18,298			17,232			59,597			54,666
Total NOI	160,399			148,681			476,338			443,653
Discontinued operations NOI included above	—			—			—			(1,102		)
Management fee income	—			11			—			154
Depreciation and amortization	(73,098		)	(70,222		)	(220,606		)	(229,866		)
Acquisition expense	(656		)	(13		)	(2,155		)	(971		)
Property management expense	(7,628		)	(7,429		)	(23,106		)	(24,019		)
General and administrative expense	(5,879		)	(6,511		)	(19,103		)	(16,065		)
Merger related expenses	—			(331		)	—			(3,202		)
Integration costs	—			(147		)	—			(7,140		)
Interest and other non-property (expense) income	(179		)	37			(359		)	1,077
Interest expense	(29,342		)	(28,251		)	(88,801		)	(89,090		)
Loss on debt extinguishment/modification	(5		)	(2,586		)	(3,384		)	(2,586		)
Amortization of deferred financing costs	(887		)	(1,000		)	(2,710		)	(3,485		)
Gain on sale of depreciable real estate assets excluded from discontinued operations	54,621			36,032			190,031			42,254
Net casualty (loss) gain after insurance and other settlement proceeds	(5		)	(126		)	485			(431		)
Income tax expense	(512		)	(442		)	(1,419		)	(1,235		)
Gain on sale of non-depreciable real estate assets	—			—			172			535
(Loss) gain from real estate joint ventures	(1		)	3,124			(5		)	6,019
Discontinued operations	—			(108		)	—			5,319
Net income attributable to noncontrolling interests	(5,094		)	(3,743		)	(16,078		)	(6,364		)
Net income attributable to MAA	$	91,734		$	66,976		$	289,300		$	113,455

Assets for each reportable segment as of September 30, 2015 and December 31, 2014, were as follows (dollars in thousands):

	September 30, 2015		December 31, 2014
Assets
Large Market Same Store	$	3,803,518	$	1,253,995
Secondary Market Same Store	1,676,365		1,003,426
Non-Same Store and Other	1,266,054		4,509,517
Corporate assets	141,404		66,656
Total assets	$	6,887,341	$	6,833,594

The decrease in the Non-Same Store and Other category, and subsequent increase in both the Large Market Same Store and Secondary Market Same Store categories, are due to the properties acquired as part of the merger with Colonial being moved out of Non-Same Store and into Same Store as the criteria noted above have been met.