8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report: August 2, 2013

MID-AMERICA APARTMENT COMMUNITIES, INC.

(Exact name of registrant as specified in its charter)

TENNESSEE	001-12762	62-1543819
(State of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

6584 Poplar Avenue
Memphis, Tennessee	38138
(Address of principal executive officer)	(Zip Code)

(901) 682-6600

(Registrant's telephone number, including area code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13 e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 8.01 Other Events.

Mid-America Apartment Communities, Inc., or MAA, is a real estate investment trust, or REIT, whose most significant asset is its ownership interest in Mid-America Apartments, L.P., a Tennessee limited partnership, or the Operating Partnership. The Operating Partnership and its subsidiaries conduct the operations of a substantial majority of MAA's business, hold a substantial majority of MAA's consolidated assets and generate a substantial majority of MAA's revenues. MAA is the sole general partner of the Operating Partnership and as of June 30, 2013, owned 40,141,197 common units of partnership interest, or approximately 95.9% of the outstanding partnership interests in the Operating Partnership. Prior to the completion of the merger between MAA and Colonial Properties Trust, which is expected to close towards the end of the third quarter of 2013, MAA plans to contribute all of its assets, with the exception of its ownership in the Operating Partnership and certain bank accounts, to the Operating Partnership. Currently, there are no publicly traded securities of the Operating Partnership.

Exhibits 99.1 and 99.2 to this Current Report are incorporated herein by reference and contain information about the Operating Partnership for the periods ended June 30, 2013 and 2012. As previously disclosed by MAA, it is anticipated that in the future, the Operating Partnership may issue registered debt securities or may be required to guarantee the registered debt securities of MAA. This information about MAA's majority-owned subsidiary, the Operating Partnership, is being filed pursuant to the instructions of Form S-3, which requires information about a majority-owned subsidiary of a well-known seasoned issuer be included in the registration statement or a post-effective amendment to the registration statement before securities of such majority-owned subsidiary may be registered on such registration statement.

This Current Report and the information incorporated herein should be read in conjunction with MAA's Quarterly Report on Form 10-Q for the period ended June 30, 2013, MAA's Annual Report on Form 10-K for the year ended December 31, 2012, and MAA's 2013 Proxy Statement filed with the Securities & Exchange Commission (SEC) on March 22, 2013.

ITEM 9.01 Financial Statements and Exhibits.

(d)     Exhibits

The following exhibits are filed pursuant to Item 9.01:

Exhibit Number	Description
99.1	Consolidated Financial Statements and Notes thereto of Mid-America Apartments, L.P.
99.2	Information about Mid-America Apartments, L.P.
101	Financial information of Mid-America Apartments, L.P. for the period ended June 30, 2013, filed with the SEC on August 2, 2013, formatted in Extensible Business Reporting Language (XBRL): (i) the Consolidated Balance Sheet as of June 30, 2013 (Unaudited) and December 31, 2012 (Unaudited); (ii) the Consolidated Statements of Operations for the three and six months ended June 30, 2013 (Unaudited) and 2012 (Unaudited); (iii) the Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2013 (Unaudited) and 2012 (Unaudited); (iv) the Consolidated Statements of Cash Flows for the six months ended June 30, 2013 (Unaudited) and 2012 (Unaudited); and (v) Notes to Consolidated Financial Statements, tagged as blocks of text (Unaudited).*

* Pursuant to Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this Current Report on Form 8-K shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be deemed part of a registration statement, prospectus or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filings

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:	August 2, 2013	/s/Albert M. Campbell, III
		Albert M. Campbell, III
		Executive Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)

EX-99.1

MID-AMERICA APARTMENT COMMUNITIES, INC. Exhibit 99.1

Explanatory Note

Unless the context otherwise requires, all references in this Current Report to "we," "us," "our," "Operating Partnership," "MAALP" or the "Company" refer to Mid-America Apartments, L.P. Unless the context otherwise requires, the references in this Current Report to "MAA" or "general partner" refers to Mid-America Apartment Communities, Inc. Any reference to the "Board" or "Board of Directors" refers to the Board of Directors of MAA. "Common Stock" refers to the common stock of MAA and "shareholders" means the holders of shares of MAA's common and preferred stock. The partnership interests of the Operating Partnership are referred to as "OP Units" and the holders of the OP Units are referred to as "unitholders".

1

Mid-America Apartments, L.P.

Condensed Consolidated Balance Sheets

June 30, 2013 and December 31, 2012

(Unaudited)

(Dollars in thousands, except unit data)

	June 30, 2013			December 31, 2012
Assets:
Real estate assets:
Land	$	370,589		$	359,943
Buildings and improvements	2,942,211			2,867,409
Furniture, fixtures and equipment	87,429			84,997
Development and capital improvements in progress	47,020			50,844
	3,447,249			3,363,193
Less accumulated depreciation	(927,829		)	(901,485		)
	2,519,420			2,461,708
Land held for future development	5,450			1,205
Commercial properties, net	7,873			8,058
Investments in real estate joint ventures	3,178			4,837
Real estate assets, net	2,535,921			2,475,808
Cash and cash equivalents	8,743			8,886
Restricted cash	12,989			809
Deferred financing costs, net	12,041			13,380
Other assets	41,039			26,882
Goodwill	4,106			4,106
Assets held for sale	5,881			—
Total assets	$	2,620,720		$	2,529,871
Liabilities and Capital:
Liabilities:
Secured notes payable	$	1,086,442		$	1,170,646
Unsecured notes payable	585,000			483,000
Accounts payable	9,436			3,889
Fair market value of interest rate swaps	11,907			21,423
Accrued expenses and other liabilities	89,462			90,559
Security deposits	6,453			6,167
Due to General Partner	46,265			24,255
Liabilities associated with assets held for sale	148			—
Total liabilities	1,835,113			1,799,939
Redeemable units	5,521			4,713
Capital:
General partner: 40,141,197 OP Units outstanding at June 30, 2013 and 39,721,461 OP Units outstanding at December 31, 2012	739,745			706,296
Limited partners: 1,707,660 OP Units outstanding at June 30, 2013 and 1,731,672 OP Units outstanding at December 31, 2012	31,705			30,993
Accumulated other comprehensive losses	(6,500		)	(26,881		)
Total partners' capital	764,950			710,408
Noncontrolling interest	15,136			14,811
Total capital	780,086			725,219
Total liabilities and capital	$	2,620,720		$	2,529,871

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 June 30, 2013 and December 31, 2012 are 78,154 and 72,786, respectively.

See accompanying notes to consolidated financial statements.

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Mid-America Apartments, L.P.

Condensed Consolidated Statements of Operations

Three and six months ended June 30, 2013 and 2012

(Unaudited)

(Dollars in thousands, except per unit data)

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Operating revenues:
Rental revenues	$	111,320		$	98,119		$	219,373		$	191,089
Other property revenues	9,804			8,894			19,139			17,399
Total property revenues	121,124			107,013			238,512			208,488
Management fee income	141			209			319			478
Total operating revenues	121,265			107,222			238,831			208,966
Property operating expenses:
Personnel	13,213			12,128			25,987			24,194
Building repairs and maintenance	3,540			3,352			6,414			6,558
Real estate taxes and insurance	14,822			12,702			29,189			24,783
Utilities	6,300			5,888			12,290			11,198
Landscaping	2,593			2,320			5,214			4,739
Other operating	8,254			7,553			15,988			14,793
Depreciation and amortization	29,772			27,415			59,506			53,572
Total property operating expenses	78,494			71,358			154,588			139,837
Acquisition expenses	489			389			499			409
Property management expenses	4,282			4,961			9,060			9,885
General and administrative expenses	2,410			2,816			5,300			5,845
Merger related expenses	5,737			—			5,737			—
Income from continuing operations before non-operating items	29,853			27,698			63,647			52,990
Interest and other non-property (loss) income	(5		)	84			13			198
Interest expense	(14,159		)	(12,577		)	(28,190		)	(25,253		)
(Loss) gain on debt extinguishment/modification	(1		)	(15		)	(62		)	5
Amortization of deferred financing costs	(763		)	(753		)	(1,528		)	(1,409		)
Net casualty gain (loss) after insurance and other settlement proceeds	438			—			454			(9		)
Loss on sale of non-depreciable assets	—			(3		)	—			(3		)
Income from continuing operations before gain (loss) from real estate joint ventures	15,363			14,434			34,334			26,519
Gain (loss) from real estate joint ventures	48			(69		)	102			(100		)
Income from continuing operations	15,411			14,365			34,436			26,419
Discontinued operations:
Income from discontinued operations before gain on sale	721			1,105			1,414			2,160
Net casualty loss after insurance and other settlement proceeds on discontinued operations	(5		)	(2		)	(5		)	(56		)
Gain on sale of discontinued operations	31,780			12,953			31,780			22,382
Consolidated net income	47,907			28,421			67,625			50,905
Net income attributable to noncontrolling interests	160			135			319			283
Net income available for Mid-America Apartments, L.P. common unitholders	$	47,747		$	28,286		$	67,306		$	50,622
Earnings per common unit - basic and diluted:
Income from continuing operations available for common unitholders	$	0.37		$	0.35		$	0.82		$	0.66
Income from discontinued property operations available for common unitholders	0.77			0.35			0.79			0.61
Net income available for common unitholders	$	1.14		$	0.70		$	1.61		$	1.27
Distributions declared per common unit	$	0.6950		$	0.6600		$	1.3900		$	1.3200

See accompanying notes to consolidated financial statements.

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Mid-America Apartments, L.P.

Condensed Consolidated Statements of Comprehensive Income

Three and six months ended June 30, 2013 and 2012

(Unaudited)

(Dollars in thousands)

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Consolidated net income	$	47,907		$	28,421		$	67,625		$	50,905
Other comprehensive income:
Unrealized gains (losses) from the effective portion of derivative instruments	12,101			(3,991		)	11,904			(5,293		)
Reclassification adjustment for losses included in net income for the effective portion of derivative instruments	3,932			4,944			8,477			10,495
Total comprehensive income	63,940			29,374			88,006			56,107
Less: comprehensive income attributable to noncontrolling interests	(160		)	(135		)	(319		)	(283		)
Comprehensive income attributable to Mid-America Apartments, L.P.	$	63,780		$	29,239		$	87,687		$	55,824
See accompanying notes to consolidated financial statements.

4

Mid-America Apartments, L.P.

Condensed Consolidated Statements of Cash Flows

Six months endedJune 30, 2013 and 2012

(Unaudited)

(Dollars in thousands)

	Six months ended June 30,
	2013			2012
Cash flows from operating activities:
Consolidated net income	$	67,625		$	50,905
Adjustments to reconcile net income to net cash provided by operating activities:
Retail revenue (accretion) amortization	(20		)	38
Depreciation and amortization	62,157			64,061
Stock compensation expense	1,050			1,104
Redeemable units issued	338			257
Amortization of debt premium	(504		)	(316		)
(Gain) loss from investments in real estate joint ventures	(102		)	98
Loss on debt extinguishment	62			(5		)
Derivative interest expense	465			361
Loss on sale of non-depreciable assets	—			3
Gain on sale of discontinued operations	(31,780		)	(22,453		)
Net casualty (gain) loss and other settlement proceeds	(449		)	65
Changes in assets and liabilities:
Restricted cash	(278		)	102
Other assets	(3,281		)	506
Accounts payable	5,575			2,699
Accrued expenses and other	(3,226		)	9,947
Security deposits	298			299
Net cash provided by operating activities	97,930			107,671
Cash flows from investing activities:
Purchases of real estate and other assets	(89,123		)	(96,941		)
Normal capital improvements	(21,837		)	(56,582		)
Construction capital and other improvements	(1,861		)	(636		)
Renovations to existing real estate assets	(4,282		)	(2,364		)
Development	(20,816		)	(18,617		)
Distributions from real estate joint ventures	8,197			10,779
Contributions to real estate joint ventures	(183		)	(69		)
Proceeds from disposition of real estate assets	56,328			53,704
Funding of escrow for exchange acquisitions	(11,902		)	—
Net cash used in investing activities	(85,479		)	(110,726		)
Cash flows from financing activities:
Advances from general partner	22,170			3,004
Net change in credit lines	2,000			(232,064		)
Proceeds from notes payable	—			150,000
Principal payments on notes payable	(2,697		)	(1,757		)
Payment of deferred financing costs	(426		)	(2,115		)
Repurchase of common units	(673		)	(17,177		)
Proceeds from issuances of common units	24,969			120,149
Distributions paid on common units	(57,937		)	(51,970		)
Net cash used in financing activities	(12,594		)	(31,930		)
Net decrease in cash and cash equivalents	(143		)	(34,985		)
Cash and cash equivalents, beginning of period	8,886			57,151
Cash and cash equivalents, end of period	$	8,743		$	22,166
Supplemental disclosure of cash flow information:
Interest paid	$	30,937		$	27,341
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	$	5,395		$	5,389
Interest capitalized	$	872		$	969
Marked-to-market adjustment on derivative instruments	$	19,916		$	4,841
Fair value adjustment on debt assumed	$	704		$	2,578
Debt assumed	$	18,293		$	30,290

See accompanying notes to consolidated financial statements.

5

Mid-America Apartments, L.P.

Notes to Condensed Consolidated Financial Statements

June 30, 2013 and 2012

(Unaudited)

1.           Consolidation and Basis of Presentation and Significant Accounting Policies

Consolidation and Basis of Presentation

Mid-America Apartments, L.P., or "MAALP", "us", "we", "our", or the "Operating Partnership", is a Memphis, Tennessee based limited partnership formed in 1993 and currently operates pursuant to the provisions of the Second Amended and Restated Agreement of Limited Partnership, or the Partnership Agreement. MAALP's sole general partner is Mid-America Apartment Communities, Inc., or MAA, a Memphis, Tennessee-based self-administered and self-managed real estate investment trust, or REIT, that focuses on acquiring, owning and operating apartment communities mainly in the Sunbelt region of the United States. As of June 30, 2013, MAALP owned or owned interests in a total of 150 multifamily apartment communities comprising 44,219 apartments located in 12 states, including four communities comprising 1,156 apartments owned through our joint venture, Mid-America Multifamily Fund II, LLC, or Fund II. MAALP also had two development communities under construction totaling 564 units as of June 30, 2013. A total of 96 units for the development projects were completed as of June 30, 2013, and therefore have been included in the totals above. Total expected costs for the development projects are $73.8 million, of which $37.8 million has been incurred through June 30, 2013. MAALP expects to complete construction on one of the projects by the fourth quarter of 2013 and the other by the fourth quarter of 2014. Four of our properties include retail components with approximately 107,000 square feet of gross leasable area.

On June 3, 2013, MAA entered into an agreement and plan of merger with Colonial Properties Trust, or Colonial, a Birmingham, Alabama-based REIT operating primarily in the multifamily apartment sector, in which MAA will merge with Colonial in a stock-for-stock transaction. As part of the merger, MAALP will also merge with Colonial Realty Limited Partnership, or Colonial LP. The mergers are expected to be completed during the third quarter of 2013. The combined company will operate under the name "MAA" and will be run by our existing management team.

The accompanying unaudited condensed consolidated financial statements have been prepared by our management in accordance with United States generally accepted accounting principles, or GAAP, for interim financial information and applicable rules and regulations of the Securities and Exchange Commission, or the SEC, and our accounting policies as set forth in our December 31, 2012 annual consolidated financial statements. All significant intercompany accounts and transactions have been eliminated in consolidation. 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. The results of operations for the three- and six-month periods ended June 30, 2013 and 2012 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with our audited financial statements and notes thereto included in our Current Report on Form 8-K filed with the SEC on March 22, 2013. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the dates of the financial statements and the amounts of revenues and expenses during the reporting periods.  Actual amounts realized or paid could differ from those estimates.

Interests in MAALP are represented by operating partnership units, or OP Units. As of June 30, 2013, there were 41,848,857 OP Units outstanding, 40,141,197, or 95.9%, of which were owned by MAA, our general partner. The remaining 1,707,660 OP Units were owned by nonaffiliated limited partners, as defined in the Partnership Agreement. During the three-month periods ended June 30, 2013 and 2012, rental revenue of the Operating Partnership represented 90.4% and 90.1% of the consolidated rental revenues of MAA, respectively. During the six-month periods ended June 30, 2013 and 2012, rental revenue of the Operating Partnership represented 90.3% and 89.9% of the consolidated rental revenues of MAA, respectively.

The consolidated financial statements presented herein include the accounts of MAALP and all other subsidiaries in which MAALP has a controlling financial interest. MAALP owns approximately 70% to 100% of all consolidated subsidiaries.

MAALP invests in entities that 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. MAALP consolidates all VIEs for which it is the primary beneficiary and uses the equity method to account for investments that qualify as VIEs but for which it is not the primary beneficiary. In determining whether MAALP is the primary beneficiary of a VIE, MAALP considers

6

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.

MAALP uses the equity method of accounting for its investments in entities for which it exercises significant influence, but does not have the ability to exercise control. These entities are not variable interest entities. The factors considered in determining that MAALP does not have the ability to exercise control include ownership of voting interests and participatory rights of investors.

Earnings per OP Unit

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. 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. For the three and six months ended June 30, 2013 and 2012, there were no dilutive securities and therefore basic and diluted earnings per OP Unit are the same.

A reconciliation of the numerators and denominators of the basic and diluted earnings per unit computations for the three and six months ended June 30, 2013 and 2012 is presented below:

(dollars and units in thousands, except per unit amounts)	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Units Outstanding
Weighted average common units - basic and diluted	41,841		40,392		41,679		39,763
Calculation of Earnings per Unit - basic and diluted
Income from continuing operations	$	15,411	$	14,365	$	34,436	$	26,419
Income from continuing operations attributable to noncontrolling interests	51		68		162		147
Income from continuing operations available for common unitholders, adjusted	$	15,360	$	14,297	$	34,274	$	26,272
Income from discontinued operations	$	32,496	$	14,056	$	33,189	$	24,486
Income from discontinued operations attributable to noncontrolling interests	109		67		157		136
Income from discontinued operations available for common unitholders, adjusted	$	32,387	$	13,989	$	33,032	$	24,350
Earnings per unit - basic and diluted:
Income from continuing operations available for common unitholders	$	0.37	$	0.35	$	0.82	$	0.66
Income from discontinued operations available for common unitholders	0.77		0.35		0.79		0.61
Net income available for common unitholders	$	1.14	$	0.70	$	1.61	$	1.27

7

2.           Segment Information

As of June 30, 2013, MAALP owned or had an ownership interest in 150 multifamily apartment communities in 12 different states from which it 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 one million and at least 1% of the total public multifamily REIT units; and

◦ that MAALP has owned and have been stabilized for at least a full 12 months and have been identified as a disposition property by the Board of Directors.

• Secondary market same store communities are generally communities:

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

◦ that MAALP has owned and have been stabilized for at least a full 12 months and have been identified as a disposition property by the Board of Directors.

• Non same store communities and other includes recent acquisitions, communities in development or lease-up and communities that have been identified for disposition. 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, MAALP determines the composition of our same store operating segments for that year as well as adjusting the previous year, which allows MAALP 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 profits. A property becomes stabilized when it reaches 90% occupancy for at least 90 days.  MAALP utilizes net operating income, or NOI, in evaluating the performance of the segments.  Total NOI represents total property revenues less total property operating expenses, excluding depreciation and amortization, for all properties held during the period regardless of their status as held for sale. MAALP believes NOI is a helpful tool in evaluating the operating performance of its segments because it measures the core operations of property performance by excluding partnership level expenses and other items not related to property operating performance.

8

Revenues and NOI for each reportable segment for the three- and six-month periods ended June 30, 2013 and 2012 were as follows (dollars in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Large Market Same Store	$	58,142		$	55,111		$	115,421		$	109,043
Secondary Market Same Store	44,849			43,342			89,098			86,014
Non-Same Store and Other	18,133			8,560			33,993			13,431
Total property revenues	121,124			107,013			238,512			208,488
Management fee income	141			209			319			478
Total operating revenues	$	121,265		$	107,222		$	238,831		$	208,966
NOI
Large Market Same Store	$	34,424		$	32,217		$	69,004		$	63,653
Secondary Market Same Store	26,841			25,735			53,547			50,792
Non-Same Store and Other	12,302			8,110			23,397			13,890
Total NOI	73,567			66,062			145,948			128,335
Discontinued operations NOI included above	(1,165		)	(2,992		)	(2,518		)	(6,112		)
Management fee income	141			209			319			478
Depreciation and amortization	(29,772		)	(27,415		)	(59,506		)	(53,572		)
Acquisition expense	(489		)	(389		)	(499		)	(409		)
Property management expense	(4,282		)	(4,961		)	(9,060		)	(9,885		)
General and administrative expense	(2,410		)	(2,816		)	(5,300		)	(5,845		)
Merger related expenses	(5,737		)	—			(5,737		)	—
Interest and other non-property (loss) income	(5		)	84			13			198
Interest expense	(14,159		)	(12,577		)	(28,190		)	(25,253		)
(Loss) gain on debt extinguishment	(1		)	(15		)	(62		)	5
Amortization of deferred financing costs	(763		)	(753		)	(1,528		)	(1,409		)
Net casualty gain (loss) and other settlement proceeds	438			—			454			(9		)
Gain on sale of non-depreciable assets	—			(3		)	—			(3		)
Gain (loss) from real estate joint ventures	48			(69		)	102			(100		)
Discontinued operations	32,496			14,056			33,189			24,486
Net income attributable to noncontrolling interests	(160		)	(135		)	(319		)	(283		)
Net income available for Mid-America Apartments, L.P. common unitholders	$	47,747		$	28,286		$	67,306		$	50,622

Assets for each reportable segment as of June 30, 2013 and December 31, 2012, were as follows (dollars in thousands):

	June 30, 2013		December 31, 2012
Assets
Large Market Same Store	$	1,187,218	$	1,108,827
Secondary Market Same Store	695,113		654,315
Non-Same Store and Other	678,361		728,209
Corporate assets	60,028		38,520
Total assets	$	2,620,720	$	2,529,871

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3.          Capital

Total capital and its components for the six-month periods ended June 30, 2013 and 2012 were as follows (dollars in thousands, except per unit data):

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2012	$	30,993		$	706,296		$	(26,881	)	$	14,811	$	725,219
Net income	2,757			64,549						319		67,625
Other comprehensive income - derivative instruments (cash flow hedges)							20,381					20,381
Issuance of units				24,969								24,969
Units repurchased and retired				(673		)						(673		)
General partner units issued in exchange for limited partner units	(443		)	443								—
Redeemable units fair market value adjustment				(431		)						(431		)
Adjustment for noncontrolling interest ownership in subsidiaries	772			(778		)				6		—
Amortization of unearned compensation				1,171								1,171
Distributions ($1.3900 per unit)	(2,374		)	(55,801		)						(58,175		)
CAPITAL BALANCE JUNE 30, 2013	$	31,705		$	739,745		$	(6,500	)	$	15,136	$	780,086

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2011	$	28,729		$	538,623		$	(38,579	)	$	13,362		$	542,135
Net income	2,407			48,215						283			50,905
Other comprehensive income - derivative instruments (cash flow hedges)							5,202						5,202
Issuance of units				120,150									120,150
Units repurchased and retired				(17,177		)							(17,177		)
General partner units issued in exchange for limited partner units	(2,516		)	2,516									—
Redeemable units fair market value adjustment				(375		)							(375		)
Adjustment for noncontrolling interest ownership in subsidiaries	3,595			(3,590		)				(5		)	—
Amortization of unearned compensation				1,231									1,231
Distributions ($1.3200 per unit)	(2,458		)	(50,818		)							(53,276		)
CAPITAL BALANCE JUNE 30, 2012	$	29,757		$	638,775		$	(33,377	)	$	13,640		$	648,795

4.           Real Estate Acquisitions

On May 1, 2013, MAALP purchased Greenwood Forest, a 316-unit apartment community located in Greenwood Forest (Houston), Texas. This property was previously a part of Mid-America Multifamily Fund I, LLC.

On May 21, 2013, MAALP purchased Station Square at Cosner's Corner, a 260-unit apartment community located in Fredericksburg, Virginia. As part of this purchase, MAALP also acquired land for future development.

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5.           Discontinued Operations

The following properties have been classified as discontinued operations in the Condensed Consolidated Statements of Operations for the three- and six-month periods ended June 30, 2013 and 2012:

Community	Number of Units	Date Sold	Location	Operating Segment
Woodbridge	188	May 15, 2013	Jacksonville, Florida	Large market same store
High Ridge	160	June 13, 2013	Athens, Georgia	Secondary market same store
Paddock Club Jacksonville	440	June 20, 2013	Jacksonville, Florida	Large market same store
Marsh Oaks	120	Held for sale	Jacksonville, Florida	Large market same store
Fountain Lake	113	Held for sale	Brunswick, Georgia	Secondary market same store

The following is a summary of discontinued operations for the three- and six-month periods ended June 30, 2013 and 2012, (dollars in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Rental revenues	$	1,984		$	5,341		$	4,317		$	11,143
Other revenues	129			514			296			1,085
Total revenues	2,113			5,855			4,613			12,228
Expenses
Property operating expenses	948			2,879			2,059			6,164
Depreciation and amortization	371			1,541			986			3,199
Interest expense	73			330			154			705
Total expense	1,392			4,750			3,199			10,068
Income from discontinued operations before gain on sale	721			1,105			1,414			2,160
Net loss on insurance and other settlement proceeds on discontinued operations	(5		)	(2		)	(5		)	(56		)
Gain on sale of discontinued operations	31,780			12,953			31,780			22,382
Income from discontinued operations	$	32,496		$	14,056		$	33,189		$	24,486

6.           Partners' Capital

Interests in MAALP are represented by OP Units. As of June 30, 2013, there were 41,848,857 OP Units outstanding, 40,141,197, or 95.9%, of which were owned by MAA, our general partner. The remaining 1,707,660 OP Units were owned by nonaffiliated limited partners, or the Class A Limited Partners. As of June 30, 2012, there were 40,328,426 OP Units outstanding, 38,544,218 or 95.6% of which were owned by MAA and 1,784,208 of which were owned by the Class A Limited Partners.

MAA, as the sole general partner, has full, complete and exclusive discretion to manage and control the business of MAALP subject to the restrictions specifically contained within 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 MAALP's assets; and distribution of MAALP 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. The general partner may delegate these and other powers granted if the general partner remains in supervision of the designee.

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Under the Partnership Agreement, MAALP may issue Class A OP Units and Class B OP Units. Class A OP Units may only be held by limited partners who are not affiliated with MAA, as defined in the Partnership Agreement, in its capacity as general partner of the Operating Partnership, while Class B OP Units may only be held by MAA, in its capacity as general partner of the Operating Partnership, and as of June 30, 2013, a total of 1,707,660 Class A OP Units in the Operating Partnership were held by limited partners unaffiliated with MAA, while a total of 40,141,197 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 MAALP'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 Operating Partnership. 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 of Class B OP Units to MAA equal to the number of common stock shares 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 Unit 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 June 30, 2013, a total of 1,707,660 Class A OP Units were outstanding and redeemable for 1,707,660 shares of MAA common stock, or approximately $115,728,118 based on the closing price of MAA’s common stock on June 30, 2013 of $67.77 per share, at MAA’s option. At June 30, 2012, a total of 1,784,208 Class A OP Units were outstanding and redeemable for 1,784,208 shares of MAA common stock, or approximately $121,754,354 based on the closing price of MAA’s common stock on June 30, 2012 of $68.24 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.

On August 26, 2010, MAALP and MAA entered into sales agreements with Cantor Fitzgerald & Co., Raymond James & Associates, Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated to sell up to a combined total of 6,000,000 shares of MAA common stock, from time to time in at-the-market offerings or negotiated transactions through a controlled equity offering program. We terminated this ATM program and on February 25, 2013, MAALP and MAA entered into sales agreements with J.P. Morgan Securities LLC, BMO Capital Markets Corp., KeyBanc Capital Markets Inc. and UBS Securities LLC with materially the same terms as our previous distribution agreements for a combined total of 4,500,000 shares of MAA common stock.

During the three- and six-month periods ended June 30, 2013, MAA sold 39,845 shares and 365,011 shares of common stock, respectively, for net proceeds of $2.7 million and $24.8 million, respectively, through its ATM programs. The gross proceeds for these issuances were $2.8 million and $25.1 million, respectively, for the three- and six-month periods ended June 30, 2013. During the three- and six-month periods ended June 30, 2012, MAA did not issue any shares through its ATM programs. As of June 30, 2013, there were 4,134,989 shares outstanding under the ATM. All proceeds from these transactions were received by MAALP in exchange for a number of OP Units equal to the number of shares issued by MAA.

On March 2, 2012, MAA closed on an underwritten public offering of 1,955,000 shares of common stock. UBS Investment Bank and Jeffries & Company, Inc. acted as joint bookrunning managers. This transaction resulted in net proceeds of $120.1 million. The gross proceeds for this offering were approximately $124.1 million. MAA had no such offerings during the three- and six-month periods ended June 30, 2013. Proceeds from this transaction were received by MAALP in exchange for OP Units equal to the number of shares issued.

We have a Dividend and Distribution Reinvestment and Share Purchase Plan, or DRSPP, pursuant to which MAA’s shareholders and our holders of OP Units have the ability to reinvest all or part of their distributions from MAA’s common stock, preferred stock or OP Units into MAA’s common stock. The plan also provides the opportunity to make optional cash investments in common shares of at least $250, but not more than $5,000 in any given month, free of brokerage commissions and charges. MAA, in its absolute discretion, may grant waivers to allow for optional cash payments in excess of $5,000. To fulfill its obligations under the DRSPP, MAA may either issue additional shares of common stock or repurchase common stock

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in the open market. MAA has registered with the Securities and Exchange Commission the offer and sale of up to 7,600,000 shares of common stock pursuant to the DRSPP. MAA may elect to sell shares under the DRSPP at up to a 5% discount.

Common stock shares totaling 188 and 329 during the three- and six-month periods ended June 30, 2013 and 209 and 329 during the three- and six-month periods ended June 30, 2012 were acquired by shareholders under the DRSPP. The issuances resulted in gross proceeds of approximately $13,000 and $22,000 for the three- and six-month periods ending June 30, 2013 and $14,000 and $22,000 for the three- and six-month periods ending June 30, 2012. All funds received from these issuances were contributed to the Operating Partnership in exchange for a number of OP Units equal to the number of shares issued by MAA.

During the six months ended June 30, 2013, 4,582 shares of MAA’s common stock were acquired from employees to satisfy minimum tax withholding obligations that arose upon vesting of restricted stock granted pursuant to approved plans. During the six months ended June 30, 2012, 15,565 shares were acquired for these purposes. MAALP acquires OP units from MAA equal to the number of shares acquired by MAA from employees to satisfy tax withholding obligations.

7.           Notes Payable

On June 30, 2013 and December 31, 2012, MAALP had total indebtedness of approximately $1.67 billion and $1.65 billion, respectively. MAALP's indebtedness as of June 30, 2013 consisted of both conventional and tax exempt debt. Borrowings were made through individual property mortgages as well as company-wide credit facilities. MAALP utilizes both secured and unsecured debt.

On March 1, 2012, MAALP entered into a $150 million unsecured term loan agreement with a syndicate of banks led by KeyBank and J.P. Morgan with a variable rate resetting monthly at LIBOR plus a spread of 1.40% to 2.15% based on a leveraged-based pricing grid and a maturity date of March 1, 2017. As of June 30, 2013, the full amount was outstanding under this agreement. In July 2012, MAALP received an investment grade rating (Baa2) from Moody's rating service, which caused the variable rate to reset monthly at LIBOR plus a spread of 1.10% to 2.05% based on an investment grade ratings grid.

On August 31, 2012, MAALP issued $175 million of Senior Unsecured Notes to be funded at three separate times. These notes were offered in a private placement with four tranches: $18 million at 3.15% maturing on November 30, 2017; $20 million at 3.61% maturing on November 30, 2019; $117 million at 4.17% maturing on November 30, 2022; and $20 million at 4.33% maturing on November 30, 2024. As of June 30, 2013, the full amount of the notes has been funded and is included in our balance sheet.

On June 14, 2013, we entered into a $250 million term loan agreement with JPMorgan at a rate of LIBOR plus a spread of 1.30% on any outstanding borrowings. This agreement matures on June 14, 2014 although borrowings are only allowed to be drawn upon up until 60 days subsequent to the closing of the merger with Colonial. We had no borrowings under this agreement at June 30, 2013.

As of June 30, 2013, approximately 41% of MAALP's outstanding debt was borrowed through secured credit facility relationships with Prudential Mortgage Capital, which are credit enhanced by the Federal National Mortgage Association, or FNMA, and Financial Federal, which are credit enhanced by the Federal Home Loan Mortgage Corporation, or Freddie Mac.

MAALP utilizes interest rate swaps and interest rate caps to help manage its current and future interest rate risk and entered into 19 interest rate swaps and 10 interest rate caps as of June 30, 2013, representing notional amounts totaling $584.0 million and $205.2 million, respectively. MAALP also held 11 non-designated interest rate caps with notional amounts totaling $63.8 million as of June 30, 2013.

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The following table summarizes our outstanding debt structure as of June 30, 2013 (dollars in thousands):

	Borrowed Balance		Effective Rate		Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	388,759	4.7	%	6/2/2019
FNMA conventional credit facilities	50,000		4.7	%	3/31/2017
Credit facility balances with:
LIBOR-based interest rate swaps	284,000		5.3	%	6/22/2014
Total fixed rate secured debt	$	722,759	4.9	%	4/28/2017
Variable Rate Secured Debt (1)
FNMA conventional credit facilities	$	214,721	0.7	%	9/6/2016
FNMA tax-free credit facilities	69,515		0.9	%	8/11/2031
Freddie Mac credit facilities	64,247		0.7	%	7/1/2014
Freddie Mac mortgage	15,200		3.5	%	1/1/2016
Total variable rate secured debt	$	363,683	0.9	%	2/14/2019
Total Secured Debt	$	1,086,442	3.6	%	12/4/2017
Unsecured Debt
Variable rate credit facility	$	125,000	1.4	%	11/1/2015
Term loan fixed with swaps	150,000		2.4	%	3/1/2017
Fixed rate senior private placement bonds	310,000		4.5	%	7/27/2021
Total Unsecured Debt	$	585,000	3.3	%	3/20/2019
Total Outstanding Debt	$	1,671,442	3.5	%	5/18/2018

⁽¹⁾ Includes capped balances.

MAALP has additional requirements related to $20.2 million of tax-free bonds issued by MAA but held within the FNMA facility. These amounts are not included in our debt discussion above or within our Consolidated Balance Sheets as MAALP is not the legal borrower of the bonds; however, because of MAALP's obligations under the FNMA facility, we could be required to pay related principal, interest, and other costs if MAA were to default on its payments.

8.           Derivatives and Hedging Activities

Risk Management Objective of Using Derivatives

MAALP is exposed to certain risk arising from both its business operations and economic conditions. MAALP principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. MAALP manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of its 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 its borrowings, the value of which are determined by changing interest rates.

Cash Flow Hedges of Interest Rate Risk

MAALP's objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, MAALP uses 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 MAALP 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.

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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 six months ended June 30, 2013 and 2012, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt.  The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three months ended June 30, 2013 and 2012, MAALP recorded ineffectiveness of $23,000 (decrease to interest expense) and $23,000, (increase to interest expense), respectively, and during the six months ended June 30, 2013 and 2012, MAALP recorded ineffectiveness of $26,000 (decrease to interest expense) and $33,000 (increase to interest expense), respectively, mainly attributable to a mismatch in the underlying indices of the derivatives and the hedged interest payments made on its variable-rate debt.

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 debt. During the next 12 months, MAALP estimates that an additional $10.9 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 June 30, 2013, MAALP 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	10	$	205,180,000
Interest Rate Swaps (1)	19	$	584,000,000

⁽¹⁾ Includes 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 MD&A or footnote 7.

Non-Designated Hedges

Derivatives not designated as hedges are not speculative and are used to manage MAALP's exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of FASB ASC 815, Derivatives and Hedging. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings and resulted in a gain of $10,000 for the three months ended June 30, 2013 and a loss of $9,000 for the three months ended June 30, 2012. During the six months ended June 30, 2013 and 2012, we recognized a loss of $3,000 and $33,000, respectively, on derivatives not designated in hedging relationships.

As of June 30, 2013, MAALP had the following outstanding interest rate derivatives that were not designated as hedges:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	11	$	63,820,000

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

The table below presents the fair value of MAALP's derivative financial instruments as well as its classification on the Consolidated Balance Sheet as of June 30, 2013 and December 31, 2012, respectively.

Fair Values of Derivative Instruments on the Consolidated Balance Sheet as of June 30, 2013 and December 31, 2012 (dollars in thousands)

	Asset Derivatives					Liability Derivatives
		June 30, 2013		December 31, 2012			June 30, 2013		December 31, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	10,626	$	245	Fair market value of interest rate swaps	$	11,907	$	21,423
Total derivatives designated as hedging instruments		$	10,626	$	245		$	11,907	$	21,423
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	62	$	43		$	—	$	—
Total derivatives not designated as hedging instruments		$	62	$	43		$	—	$	—

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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 Consolidated Statements of Operations for the three and six months ended June 30, 2013 and 2012, respectively.

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

Three and Six Months Ended June 30, 2013 and 2012 (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 June 30,	2013		2012				2013			2012				2013			2012
Interest rate contracts	$	12,101	$	(3,991	)	Interest expense	$	(3,932	)	$	(4,944	)	Interest expense	$	23		$	(23	)
Total derivatives in cash flow hedging relationships	$	12,101	$	(3,991	)		$	(3,932	)	$	(4,944	)		$	23		$	(23	)
Six months ended June 30,
Interest rate contracts	$	11,904	$	(5,293	)	Interest expense	$	(8,477	)	$	(10,495	)	Interest expense	$	26		$	(33	)
Total derivatives in cash flow hedging relationships	$	11,904	$	(5,293	)		$	(8,477	)	$	(10,495	)		$	26		$	(33	)
Derivatives Not Designated as Hedging Instruments
Three months ended June 30,													Location of Gain or (Loss) Recognized in Income	2013			2012
Interest rate contracts													Interest expense	$	10		$	(9	)
Total														$	10		$	(9	)
Six months ended June 30,
Interest rate contracts													Interest expense	$	(3	)	$	(33	)
Total														$	(3	)	$	(33	)

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Credit-Risk-Related Contingent Features

As of June 30, 2013, derivatives that were in a net liability position and subject to credit-risk-related contingent features had a termination value of $12.8 million, which includes accrued interest but excludes any adjustment for nonperformance risk. These derivatives had a fair value, gross of asset positions, of $11.9 million at June 30, 2013.

Certain of our derivative contracts contain a provision where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. As of June 30, 2013, 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 their termination value of $8.5 million.

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 the Company's default on the indebtedness. As of June 30, 2013, we had not breached the provisions of these agreements. If we had breached theses provisions, we could have been required to settle our obligations under the agreements at the termination value of $0.2 million.

Certain of our derivative contracts are credit enhanced by either FNMA or Freddie Mac.  These derivative contracts require that our credit enhancing party maintain credit ratings above a certain level.  If our credit support providers were downgraded below Baa1 by Moody’s or BBB+ by Standard & Poor’s, or S&P, we may be required to either post 100 percent collateral or settle the obligations at their termination value of $12.5 million as of June 30, 2013.  Both FNMA and Freddie Mac are currently rated Aaa by Moody’s and AA+ by S&P, and therefore, the provisions of this agreement have not been breached and no collateral has been posted related to these agreements as of June 30, 2013.

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 Consolidated Balance Sheet.

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The table below presents a gross presentation, the effects of offsetting, and a net presentation of our derivatives as of June 30, 2013 and December 31, 2012. 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 Consolidated Balance Sheet (dollars in thousands):

Offsetting of Derivative Assets
As of June 30, 2013
						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	$	10,688	—	$	10,688	$	(422	)	—	$	10,266
Offsetting of Derivative Liabilities
As of June 30, 2013
						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	$	11,907	—	$	11,907	$	(422	)	—	$	11,485
Offsetting of Derivative Assets
As of December 31, 2012
						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	$	288	—	$	288	—			—	$	288
Offsetting of Derivative Liabilities
As of December 31, 2012
						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	$	21,423	—	$	21,423	—			—	$	21,423

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Other Comprehensive Income

MAALP's other comprehensive income consists entirely of gains and losses attributable to the effective portion of our cash flow hedges. The table below shows the change in the balance for the six months ended June 30, 2013 and 2012:

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 six months ended June 30,
		2013			2012
Beginning balance		$	(26,881	)	$	(38,579	)
Other comprehensive income before reclassifications		11,904			(5,293		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	8,477			10,495
Net current-period other comprehensive income attributable to Mid-America Apartments, L.P.		20,381			5,202
Ending balance		$	(6,500	)	$	(33,377	)

See also discussions in "Financial Statements – Notes to Consolidated Financial Statements", Note 9.

9.           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.

On January 1, 2008, MAALP adopted FASB 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 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. 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).

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. MAALP's 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 June 30, 2013 and December 31, 2012, totaled $749 million and $732 million, respectively, and had estimated fair values of $784 million and $778 million (excluding prepayment penalties), respectively, as of June 30, 2013 and December 31, 2012. The carrying value of variable rate notes payable (excluding the effect of interest rate swap and cap agreements) at June 30, 2013 and December 31, 2012, totaled $923 million and $921 million, respectively, and had estimated

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fair values of $857 million and $851 million (excluding prepayment penalties), respectively, as of June 30, 2013 and December 31, 2012.

Currently, MAALP uses interest rate swaps and interest rate caps (options) to manage its interest rate risk. 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 (caps) 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, MAALP incorporates 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, MAALP has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

MAALP has 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 June 30, 2013 and December 31, 2012 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 June 30, 2013 and December 31, 2012, 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 June 30, 2013

(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
							June 30, 2013
Assets
Derivative financial instruments	$	—	$	10,688	$	—	$	10,688
Liabilities
Derivative financial instruments	$	—	$	11,907	$	—	$	11,907

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Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2012

(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, 2012
Assets
Derivative financial instruments	$	—	$	288	$	—	$	288
Liabilities
Derivative financial instruments	$	—	$	21,423	$	—	$	21,423

The fair value estimates presented herein are based on information available to management as of June 30, 2013 and December 31, 2012.  These estimates are not necessarily indicative of the amounts MAALP could ultimately realize.  See also discussions in "Financial Statements – Notes to Consolidated Financial Statements", Note 8.

10.           Recent Accounting Pronouncements

Impact of Recently Issued Accounting Standards

In February 2013, the FASB issued Accounting Standards Update, or ASU, No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of Accumulated other comprehensive income, or AOCI, by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. ASU 2013-02 is effective for interim and annual periods beginning after December 15, 2012 and early adoption is permitted. We early adopted ASU 2013-02 for the annual period ended December 31, 2012. The adoption of ASU 2013-02 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In January 2013, the FASB issued ASU No. 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. ASU 2013-01 clarifies that the scope of ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, would apply to derivatives accounted for in accordance with FASB ASC 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with ASC 210-20-45 or ASC 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. This ASU is effective for fiscal years beginning on or after January 1, 2013 and interim periods within those annual periods. We adopted ASU 2013-01 during the period ended March 31, 2013. The adoption of ASU 2013-01 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In May 2011, the FASB issued ASU No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments change the wording, mainly for clarification, used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the Board does not intend for the amendments in this update to result in a change in the application of the requirements in ASU 2011-04. The amendments in this ASU are to be applied prospectively. The amendments are effective during interim and annual periods beginning after December 15, 2011. We adopted ASU 2011-04 for the interim and annual periods of fiscal year 2012. The adoption of ASU 2011-04 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

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11. Subsequent Events

Financings

Subsequent to quarter end, we received commitments from a syndicate of banks for an expansion of our unsecured revolving credit facility. The new facility will provide for $500 million of borrowing with capacity for expansion up to $800 million.

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EX-99.2

Exhibit 99.2

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

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.

Forward Looking Statements

We consider this and other sections of this Current Report on Form 8-K to contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, 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 and statements about the benefits of the business combination transaction involving Colonial Properties Trust. 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 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:

• 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;

• inability to consummate the merger with Colonial Properties Trust and the timing of the closing of the merger;

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

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

• inability of a joint venture to perform as expected;

• inability to acquire additional or dispose of existing apartment units on favorable economic terms;

• unexpected capital needs;

• increasing real estate taxes and insurance costs;

• losses from catastrophes in excess of our insurance coverage;

• inability to acquire funding through the capital markets;

• the availability of credit, including mortgage financing, and the liquidity of the debt markets, including a material deterioration of the financial condition of the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation;

• inability to replace financing with the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation should their investment in the multifamily industry decrease or cease to exist;

• changes in interest rate levels, including that of variable rate debt, which are extensively used by us;

• 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;

• inability to meet loan covenants;

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

• inability of MAA to pay required distributions to maintain REIT status due to required debt payments;

• 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;

• imposition of federal taxes if MAA fails to qualify as a REIT under the Internal Revenue Code in any taxable year or foregone opportunities to ensure REIT status;

• inability to attract and retain qualified personnel;

• potential liability for environmental contamination;

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• adverse legislative or regulatory tax changes; and

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

Critical Accounting Policies and Estimates

The following discussion and analysis of financial condition and results of operations are based upon our condensed consolidated financial statements, and the notes thereto, which have been prepared in accordance with GAAP. The preparation of these condensed consolidated financial statements requires us to make a number of estimates and assumptions that affect the reported amounts and disclosures in the condensed consolidated financial statements. On an ongoing basis, we evaluate our estimates and assumptions based upon historical experience and various other factors and circumstances. We believe that our estimates and assumptions are reasonable under the circumstances; however, actual results may differ from these estimates and assumptions.

We believe that the estimates and assumptions listed below are most important to the portrayal of our financial condition and results of operations because they require the greatest subjective determinations and form the basis of accounting policies deemed to be most critical. These critical accounting policies include revenue recognition, capitalization of expenditures and depreciation and amortization of assets, impairment of long-lived assets, including goodwill, acquisition of real estate assets and fair value of derivative financial instruments.

Revenue Recognition and Real Estate Sales

We lease multifamily residential apartments under operating leases primarily with terms of one year or less. Rental revenues are recognized using a method that represents a straight-line basis over the term of the lease and other revenues are recorded when earned.

We record gains and losses on real estate sales in accordance with accounting standards governing the sale of real estate. For sale transactions meeting the requirements for the full accrual method, we remove the assets and liabilities from our Consolidated Balance Sheets and record the gain or loss in the period the transaction closes. For properties contributed to our joint ventures, we record gains on the partial sale in proportion to the outside partners' interest in the joint venture.

Capitalization of expenditures and depreciation and amortization of assets

We carry real estate assets at depreciated cost. Depreciation and amortization is computed on a straight-line basis over the estimated useful lives of the related assets, which range from 8 to 40 years for land improvements and buildings, 5 years for furniture, fixtures, and equipment, 3 to 5 years for computers and software, 5 years amortization for acquired retail leases, and 6 months amortization for acquired residential leases, all of which are subjective determinations. Repairs and maintenance costs are expensed as incurred while significant improvements, renovations and replacements are capitalized.

Development costs are capitalized in accordance with accounting standards for costs and initial rental operations of real estate projects and standards for the capitalization of interest cost, real estate taxes and personnel expense.

Impairment of long-lived assets, including goodwill

We account for long-lived assets in accordance with the provisions of accounting standards for the impairment or disposal on long-lived assets and evaluate our goodwill for impairment under accounting standards for goodwill and other intangible assets. We evaluate goodwill for impairment on at least an annual basis, or more frequently if a goodwill impairment indicator is identified. We periodically evaluate long-lived assets, including investments in real estate and goodwill, for indicators that would suggest that the carrying amount of the assets may not be recoverable. The judgments regarding the existence of such indicators are based on factors such as operating performance, market conditions and legal factors.

Long-lived assets, such as real estate assets, equipment and purchased intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented on the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer depreciated. The assets and liabilities of a disposed group classified as held for sale are presented separately in the appropriate asset and liability sections of the balance sheet.

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Goodwill is tested annually for impairment and is tested for impairment more frequently if events and circumstances indicate

that the asset might be impaired. An impairment loss for goodwill is recognized to the extent that the carrying amount exceeds the implied fair value of goodwill. This determination is made at the reporting unit level and consists of two steps. First, we determine the fair value of a reporting unit and compare it to its carrying amount. In the apartment industry, the primary method used for determining fair value is to divide annual operating cash flows by an appropriate capitalization rate. We determine the appropriate capitalization rate by reviewing the prevailing rates in a property's market or submarket. Second, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized for any excess of the carrying amount of the reporting unit's goodwill over the implied fair value of that goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit in a manner similar to a purchase price allocation in accordance with accounting standards for business combinations. The residual fair value after this allocation is the implied fair value of the reporting unit goodwill.

Acquisition of real estate assets

We account for our acquisitions of investments in real estate in accordance with ASC 805-10, Business Combinations, which requires the fair value of the real estate acquired to be allocated to the acquired tangible assets, consisting of land, building and furniture, fixtures and equipment, and identified intangible assets, consisting of the value of in-place leases.

We allocate the purchase price to the fair value of the tangible assets of an acquired property determined by valuing the property as if it were vacant, based on management's determination of the relative fair values of these assets. Management determines the as-if-vacant fair value of a property using methods similar to those used by independent appraisers. These methods include using stabilized NOI and market specific capitalization and discount rates.

In allocating the fair value of identified intangible assets of an acquired property, the in-place leases are valued based on current rent rates and time and cost to lease a unit. Management concluded that the residential leases acquired on each of its property acquisitions are approximately at market rates since the residential lease terms generally do not extend beyond one year.

Our policy is to expense the costs incurred to acquire properties in the period these costs occur. Acquisition costs include appraisal fees, title fees, broker fees, and other legal costs to acquire the property. These costs are recorded in our Statement of Operations under the line Acquisition expenses.

Fair value of derivative financial instruments

We utilize certain derivative financial instruments, primarily interest rate swaps and interest rate caps, during the normal course of business to manage, or hedge, the interest rate risk associated with our variable rate debt or as hedges in anticipation of future debt transactions to manage well-defined interest rate risk associated with the transaction.

In order for a derivative contract to be designated as a hedging instrument, changes in the hedging instrument must be highly effective at offsetting changes in the hedged item. The historical correlation of the hedging instruments and the underlying hedged items are assessed before entering into the hedging relationship and on a quarterly basis thereafter, and have been found to be highly effective.

We measure ineffectiveness using the change in the variable cash flows method or the hypothetical derivative method for interest rate swaps and the hypothetical derivative method for interest rate caps for each reporting period through the term of the hedging instruments. Any amounts determined to be ineffective are recorded in earnings. The change in fair value of the interest rate swaps and the intrinsic value or fair value of interest rate caps designated as cash flow hedges are recorded to accumulated other comprehensive income in the Condensed Consolidated Balance Sheets.

The valuation of our derivative financial instruments is determined using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash receipts. The variable cash 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 caps 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 interest rate caps. The variable interest rates used in the calculation of projected receipts on the interest rate cap are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities. Additionally, 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. Changes in the fair values of our derivatives are

22

primarily the result of fluctuations in interest rates. See Notes 8 and 9 of the accompanying Condensed Consolidated Financial Statements.

Overview of the Three Months Ended June 30, 2013

We experienced an increase in income from continuing operations before non-operating items for the three months ended June 30, 2013 over the three months ended June 30, 2012 as increases in revenues outpaced increases in property operating expenses. The increases in revenues came from a 5.5% increase in our large market same store segment, a 3.5% increase in our secondary market same store segment and a 111.8% increase in our non-same store and other segment, which was primarily a result of acquisitions. 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/redevelopment, and communities approved for disposition by the Board of Directors.

As of June 30, 2013, our wholly-owned portfolio consisted of 43,063 apartment units in 146 communities, compared to 42,196 apartment units in 147 communities at June 30, 2012. For these communities, the average effective rent per apartment unit, excluding units in lease-up, increased to $881.70 per unit at June 30, 2013 from $831.30 per unit at June 30, 2012.  For these same communities, overall occupancy at June 30, 2013 and 2012 was 96.2% and 96.0%, respectively. Average effective 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 rent is a helpful measurement in evaluating average pricing. It does not represent actual rental revenue collected per unit.

On June 3, 2013, MAA entered into an agreement and plan of merger with Colonial Properties Trust, or Colonial, a Birmingham, Alabama-based REIT operating primarily in the multifamily apartment sector, in which MAA will merge with Colonial in a stock-for-stock transaction. As part of the merger, MAALP will also merge with Colonial Realty Limited Partnership, or Colonial LP. The mergers are expected to be completed during the third quarter of 2013. The combined company will operate under the name "MAA" and will be run by our existing management team.

The following is a discussion of our consolidated financial condition and results of operations for the three- and six-month periods ended June 30, 2013 and 2012.  This discussion should be read in conjunction with all of the consolidated financial statements included in this Current Report on Form 8-K.

Results of Operations

Comparison of the Three-Month Period Ended June 30, 2013 to the Three-Month Period Ended June 30, 2012

Property revenues for the three months ended June 30, 2013 were approximately $121.1 million, an increase of approximately $14.1 million from the three months ended June 30, 2012 due to (i) a $3.0 million increase in property revenues from our large market same store group primarily as a result of an increase in average rent per unit, (ii) a $1.5 million increase in property revenues from our secondary market same store group primarily as a result of an increase in average rent per unit, and (iii) a $9.6 million increase in property revenues from our non-same store and other group, primarily as a result of acquisitions. See further discussion on revenue growth in the Trends section below.

Property operating expenses include costs for property personnel, property personnel bonuses, building repairs and maintenance, real estate taxes and insurance, utilities, landscaping and depreciation and amortization. Property operating expenses, excluding depreciation and amortization, for the three months ended June 30, 2013 were approximately $48.7 million, an increase of approximately $4.8 million from the three months ended June 30, 2012 due primarily to (i) an increase in property operating expenses of $0.8 million from our large market same store group, (ii) an increase in property operating expenses of $0.4 million from our secondary market same store group, and (iii) an increase in property operating expenses of $3.6 million from our non-same store and other group, primarily as a result of acquisitions. The increases in property operating expenses in the large market same store group and secondary market same store group are mainly the result of increases in real estate taxes. Other increases are the result of normal operating costs.

Depreciation and amortization expense for the three months ended June 30, 2013 was approximately $29.8 million, an increase of approximately $2.4 million from the three months ended June 30, 2012 primarily due to (i) an increase in depreciation and amortization expense of $0.2 million from our large market same store group (ii) an increase of $0.1 million from our secondary market same store group, and (iii) an increase of $2.1 million from our non-same store and other group, mainly as a result of acquisitions.

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Merger related expenses for the pending acquisition of Colonial for the three months ended June 30, 2013 were approximately $5.7 million. We did not incur any merger relate expenses during the three months ended June 30, 2012.

Interest expense increased by approximately $1.6 million during the three months ended June 30, 2013 compared to the three months ended June 30, 2012 primarily as a result of an increase in our average debt outstanding of approximately $126.8 million. This increase is partially offset by a decrease in the average interest rate from 3.8% to 3.5%.

We recorded a gain on sale of three properties and one property, respectively, presented in discontinued operations of $31.8 million and $13.0 million for the three months ended June 30, 2013 and 2012, respectively.

Primarily as a result of the foregoing, net income available for Mid-America Apartments, L.P. common unitholders increased by approximately $19.5 million in the three months ended June 30, 2013 from the three months ended June 30, 2012.

Comparison of the Six-Month Period Ended June 30, 2013 to the Six-Month Period Ended June 30, 2012

Property revenues for the six months ended June 30, 2013 were approximately $238.5 million, an increase of approximately $30.0 million from the six months ended June 30, 2012 due to (i) a $6.4 million increase in property revenues from our large market same store group primarily as a result of an increase in average rent per unit, (ii) a $3.1 million increase in property revenues from our secondary market same store group primarily as a result of an increase in average rent per unit, and (iii) a $20.5 million increase in property revenues from our non-same store and other group, primarily as a result of acquisitions. See further discussion on revenue growth in the Trends section below.

Property operating expenses include costs for property personnel, property personnel bonuses, building repairs and maintenance, real estate taxes and insurance, utilities, landscaping and depreciation and amortization. Property operating expenses, excluding depreciation and amortization, for the six months ended June 30, 2013 were approximately $95.1 million, an increase of approximately $8.8 million from the six months ended June 30, 2012 due primarily to (i) an increase in property operating expenses of $1.0 million from our large market same store group, (ii) an increase in property operating expenses of $0.3 million from our secondary market same store group, and (iii) an increase in property operating expenses of $7.5 million from our non-same store and other group, primarily as a result of acquisitions. The increases in property operating expenses in the large market same store group and secondary market same store group are mainly the result of increases in real estate taxes. Other increases are the result of normal operating costs.

Depreciation and amortization expense for the six months ended June 30, 2013 was approximately $59.5 million, an increase of approximately $5.9 million from the six months ended June 30, 2012 primarily due to (i) an increase in depreciation and amortization expense of $0.1 million from our large market same store group (ii) an increase of $0.1 million from our secondary market same store group, and (iii) an increase of $5.7 million from our non-same store and other group, mainly as a result of acquisitions.

Merger related expenses for the pending acquisition of Colonial for the six months ended June 30, 2013 were approximately $5.7 million. We did not incur any merger relate expenses during the six months ended June 30, 2012.

Interest expense increased by approximately $2.9 million during the six months ended June 30, 2013 compared to the six months ended June 30, 2012 primarily as a result of an increase in our average debt outstanding of approximately $105.7 million. This increase is partially offset by a decrease in the average interest rate from 3.8% to 3.5%.

We recorded a gain on sale of three properties presented in discontinued operations of $31.8 million and $22.4 million for the six months ended June 30, 2013 and 2012, respectively.

Primarily as a result of the foregoing, net income available for Mid-America Apartments, L.P. common unitholders increased by approximately $16.7 million in the six months ended June 30, 2013 from the six months ended June 30, 2012.

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Funds From Operations and Net Income

Funds from operations, or FFO, represents net income (computed in accordance with GAAP) excluding extraordinary items, net income attributable to noncontrolling interest, asset impairment, gains or losses on disposition of real estate assets, plus depreciation and amortization of real estate, and adjustments for joint ventures to reflect FFO on the same basis. This definition of FFO is in accordance with the National Association of Real Estate Investment Trusts, or NAREIT, definition. Disposition of real estate assets includes sales of discontinued operations.

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 in that such 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.

The following table is a reconciliation of FFO to net income available for Mid-America Apartments, L.P. common unitholders for the three- and six-month periods ended June 30, 2013, and 2012 (dollars in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Net income available for Mid-America Apartments, L.P. common unitholders	$	47,747		$	28,286		$	67,306		$	50,622
Depreciation and amortization of real estate assets	29,237			26,833			58,388			52,436
Depreciation and amortization of real estate assets of discontinued operations	370			1,536			983			3,241
Gain on sales of discontinued operations	(31,780		)	(12,953		)	(31,780		)	(22,382		)
Depreciation and amortization of real estate assets of real estate joint ventures	281			438			661			995
Net income attributable to noncontrolling interests	160			135			319			283
Funds from operations	$	46,015		$	44,275		$	95,877		$	85,195

FFO for the three- and six-month periods ended June 30, 2013 increased by approximately $1.7 million and $10.7 million, respectively, from the three- and six-month periods ended June 30, 2012 primarily as a result of the increases in property revenues of approximately $14.1 million and $30.0 million discussed above that were only partially offset by the $4.8 million and $8.8 million increase in property operating expenses, excluding depreciation and amortization. FFO is also reduced by the $5.7 million in merger related expenses for the three and six months ended June 30, 2013.

Trends

During the three-month period ended June 30, 2013, rental demand for apartments was strong, as it was throughout 2012 and the first quarter of 2013. This strength was evident on two fronts: same store physical occupancy during the three-month period ended June 30, 2013 remained consistent with the three-month period ended June 30, 2012, ending at over 96% for both periods; and pricing continued to increase on both new leases and renewals signed during the three-month period ended June 30, 2013 as compared to the three-month period ended March 31, 2013 and the three-month period ended June 30, 2012. We have maintained this momentum despite job formation, one of the primary drivers of apartment demand, continuing to increase at a below average pace.

An important part of our portfolio strategy is to maintain a broad diversity of markets across the Sunbelt region 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 June 30, 2013, we were invested in approximately 45 defined Metropolitan Statistical Areas, with 59% of our gross assets in large markets and 41% of our gross assets in select secondary markets.

We also continued to benefit in the quarter ended June 30, 2013 on the supply side. New supply of rental units entering the market was low, running below historical new supply delivery averages. Multifamily permitting did pick up in 2012 and has continued to increase in 2013. We believe this permitting will ultimately lead to an increase in supply, but also believe the lack of new apartments in recent years combined with demand from new households will help keep supply and demand in balance.

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Competition from condominiums reverting back to rental units, or new condominiums being converted to rental, was not a major factor in our portfolio because most of our submarkets have not been primary areas for condominium development. We have found the same to be true for rental competition from single family homes. We have avoided committing a significant amount of capital to markets or submarkets where most of the excessive inflation in house prices has occurred. We saw significant rental competition from condominiums or single family houses in only a few of our submarkets.

Our focus continues to be on increasing pricing where possible through our revenue management system, while maintaining strong physical occupancy. Through these efforts, same store effective monthly rent per unit for the three-month period ended June 30, 2013 was higher than the three-month period ended June 30, 2012 by 4.3%. With strong occupancy in place during the current busy summer leasing season, this pricing power is likely poised to continue.

Overall same store revenues increased 4.6% for the three-month period ended June 30, 2013 as compared to the three-month period ended June 30, 2012. This increase was primarily due to rising rents, and helped by increases in ancillary income. Although new multifamily development is occurring, the permitting data so far suggests that levels will remain below pre-recession deliveries, although there can be no assurance in this regard. Also, we believe that more sustainable credit terms for residential mortgages, as evidenced by the recently announced “Qualified Mortgage Rule”, should work to favor rental demand at existing multi-family properties. 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 support apartment rental demand for our markets.

Should the economy fall back into a recession, more disciplined mortgage financing for single family home buying should lessen the impact to the multifamily sector to some degree, but a weak economy and employment market would nevertheless limit rent growth prospects.

We continue to develop improved products, operating systems and procedures that enable us to capture more revenues. 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 dollars. We also actively work on improving processes and products to reduce expenses, such as new web-sites and internet access for our residents that enable them to transact their business with us more simply and effectively.

Liquidity and Capital Resources

Net cash flow provided by operating activities decreased to $97.9 million for the six months ended June 30, 2013 from $107.7 million for the six months ended June 30, 2012 even though the increase in property revenues of $30.0 million for the six months ended June 30, 2013 from the six months ended June 30, 2012 exceeded the $8.8 million increase in property operating expenses, excluding depreciation and amortization and other incremental operating expenses, in total over the same period. This decrease is mainly due to the gain on sale of discontinued operations and the timing of payments of operating liabilities.

Net cash used in investing activities was approximately $85.5 million during the six months ended June 30, 2013 compared to $110.7 million during the six months ended June 30, 2012.  During the six months ended June 30, 2013, we had $89.1 million in cash outflows for property acquisitions. We had $96.9 million in cash outflows for property acquisitions for the six months ended June 30, 2012. We also had cash outflows of $21.8 million related to normal recurring capital expenditures for the six months ended June 30, 2013 compared to $56.6 million for the six months ended June 30, 2012. We also had cash outflows of $20.8 million related to development activities during the six months ended June 30, 2013 compared to approximately $18.6 million for the six months ended June 30, 2012.  In addition to acquisition costs and development costs, we had outflows of $4.3 million for renovations to existing real estate assets during the six months ended June 30, 2013, compared to $2.4 million for the six months ended June 30, 2012. We received approximately $56.3 million related to the disposition of five properties during the six months ended June 30, 2013 compared to receiving approximately $53.7 million related to the disposition of four properties during the six months ended June 30, 2012. We received approximately $8.2 million during the six months ended June 30, 2013 as distributions from our joint ventures compared to $10.8 million for the six months ended June 30, 2012. During the six months ended June 30, 2013, we had approximately $11.9 million in cash outflows related to funding of escrow for exchange acquisitions. We did not have any cash outflows related to funding of escrow for future acquisitions during the six months ended June 30, 2012.

Net cash used in financing activities was approximately $12.6 million for the six months ended June 30, 2013, compared to$31.9 million during the six months ended June 30, 2012. During the six months ended June 30, 2013, we received net proceeds of approximately $25.0 million primarily from the issuance of shares of common stock through MAA's ATM program and the optional cash purchase feature of our DRSPP. During the six months ended June 30, 2012, we received proceeds of approximately $120.1 million from the issuance of shares of MAA common stock through the March 2, 2012 public offering

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and the optional cash purchase feature of our DRSPP. In connection with any issuance by MAA, MAALP issues OP units to MAA equal to the number of shares issued by MAA in exchange for the net proceeds received from these transactions. We used a portion of the proceeds to fund partially the pay down of our credit lines during the six months ended June 30, 2012. We currently have 4,134,989 shares remaining under MAA's ATM program. We paid down approximately $0.7 million and $83.8 million of debt in the six months ended June 30, 2013 and 2012, respectively, primarily due to cash outflows for the reduction in outstanding debt in the FNMA credit facility.

The weighted average interest rate at June 30, 2013 for the $1.1 billion of secured debt outstanding was 3.6%, compared to the weighted average interest rate of 3.9% on $1.2 billion of secured debt outstanding at June 30, 2012.  The weighted average interest rate at June 30, 2013 for the $585.0 million of unsecured debt was 3.3% compared to the weighted average interest rate of 3.4% on $363 million of unsecured debt outstanding at June 30, 2012.  We utilize both conventional and tax exempt debt to help finance our activities. Borrowings are made through individual property mortgages as well as company-wide credit facilities and bond placements. 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 section.

On March 1, 2012, we entered into a $150 million unsecured term loan agreement with a syndicate of banks led by KeyBank and J.P. Morgan at a rate of LIBOR plus a spread of 1.40% to 2.15% based on a leveraged based pricing grid and a maturity date of March 1, 2017. We had borrowings of $150 million outstanding under this agreement at June 30, 2013. In July 2012, we received an investment grade rating (Baa2) from Moody's pricing service, which reduced the variable rate to LIBOR plus a spread of 1.10% to 2.05% based on an investment grade ratings grid.

On August 31, 2012, we issued $175 million of Senior Unsecured Notes to be funded at three separate times. The notes were offered in a private placement with four tranches: $18 million at 3.15% maturing on November 30, 2017; $20 million at 3.61% maturing on November 30, 2019; $117 million at 4.17% maturing on November 30, 2022; and $20 million at 4.33% maturing on November 30, 2024. As of June 30, 2013, the full amount of the notes has been funded and is included in our Consolidated Balance Sheet.

On June 14, 2013, we entered into a $250 million term loan agreement with JPMorgan at a rate of LIBOR plus a spread of 1.30% on any outstanding borrowings. This agreement matures on June 14, 2014 although borrowings are only allowed to be drawn upon up until 60 days subsequent to the closing of the merger with Colonial. We had no borrowings under this agreement at June 30, 2013.

Approximately 29% of our outstanding obligations at June 30, 2013 were borrowed through credit facilities with/or credit enhanced by FNMA, also referred to as the FNMA Facilities. The FNMA Facilities have a combined line limit of approximately $863.4 million, of which $509.2 million was collateralized and available to borrow at June 30, 2013. We had total borrowings outstanding under the FNMA Facilities of $484.2 million at June 30, 2013. Various tranches of the FNMA Facilities mature from 2013 through 2033. The FNMA Facilities provide for both fixed and variable rate borrowings. The interest rate on the majority of the variable portion is based on the FNMA Discount Mortgage Backed Security, or DMBS, rate, which are credit-enhanced by FNMA 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 FNMA Facilities, plus a credit enhancement fee of 0.49% to 0.67%.

Approximately 12% of our outstanding obligations at June 30, 2013 were borrowed through a facility with/or credit enhanced by Freddie Mac, also referred to as the Freddie Mac Facility. The Freddie Mac Facility has a total line limit of $200.0 million, of which $198.2 million was collateralized and available to borrow at June 30, 2013. We had total borrowings outstanding under the Freddie Mac Facility of approximately $198.2 million at June 30, 2013. The Freddie Mac Facility matures in 2014. The interest rate on the Freddie Mac Facility renews every 30 or 90 days and is based on the Freddie Mac Reference Bill Rate on the date of renewal, which has historically approximated the equivalent one month or three month LIBOR, plus a credit enhancement fee of 0.65%. The Freddie Mac Reference Bill rate has traded consistently below LIBOR, and the historical average spread is 0.31% below LIBOR.

We also maintain a $325.0 million unsecured credit facility with nine banks led by KeyBank, which bears interest at one-month LIBOR plus a spread of 1.05% to 1.85% based on an investment pricing grid. This credit facility expires in November 2015 with a one year extension option. At June 30, 2013, we had $323.6 million available to be borrowed under this credit facility with $125.0 million borrowed. Approximately $1.4 million of this credit facility is used to support letters of credit.

Each of our credit facilities is subject to various covenants and conditions on usage, and the secured facilities are subject to periodic re-evaluation of collateral. If we were to fail to satisfy a condition to borrowing, the available credit under one or more of the facilities could not be drawn, which could adversely affect our liquidity. In the event of a reduction in real estate values,

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the amount of available credit could be reduced. Moreover, if we were to fail to make a payment or violate a covenant under a credit facility, one or more of our lenders could declare a default after applicable cure periods, 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. We believe we were in compliance with these covenants and conditions on usage at June 30, 2013.

The following schedule details the line limits, availability, outstanding balances and contract maturities of our various borrowings as of June 30, 2013 (dollars in thousands):

	Line Limit		Amount Collateralized and/or Available		Amount Borrowed		Average Years to Contract Maturity
Fannie Mae Credit Facilities	$	863,429	$	509,236	$	484,236	5.4
Freddie Mac Credit Facilities	200,000		198,247		198,247		1.0
Other Secured Borrowings	403,959		403,959		403,959		5.8
Unsecured Credit Facility	325,000		323,637		125,000		2.3
Other Unsecured Borrowings	460,000		460,000		460,000		6.6
JPMorgan Term Loan	250,000		250,000		—		1.0
Total Debt	$	2,502,388	$	2,145,079	$	1,671,442	5.1

As of June 30, 2013, we had entered into designated interest rate swaps totaling a notional amount of $584.0 million. To date, these swaps have proven to be highly effective hedges. We also entered into interest rate cap agreements totaling a notional amount of approximately $205.2 million as of June 30, 2013. Five major banks provide approximately 98% of our derivative fair value, all of which have investment grade ratings from Moody’s and Standard & Poor's.

The following schedule outlines our variable versus fixed rate debt, including the impact of interest rate swaps and caps, outstanding as of June 30, 2013 (dollars in thousands):

	Principal Balance		Average Years to Rate Maturity	Effective Rate
SECURED DEBT
Conventional - Fixed Rate or Swapped	$	722,759	3.8	4.9	%
Conventional - Variable Rate - Capped (1) (2)	213,136		2.7	0.9	%
Tax-free – Variable Rate - Capped (1)	69,515		3.5	0.9	%
Total Fixed or Hedged Rate Maturity	$	1,005,410	3.6	3.8	%
Conventional - Variable Rate	81,032		0.2	0.7	%
Total Secured Rate Maturity	$	1,086,442	3.3	3.6	%
UNSECURED DEBT
Fixed Rate or Swapped	$	460,000	6.6	3.8	%
Variable Rate	125,000		0.1	1.4	%
Total Unsecured Rate Maturity	$	585,000	5.2	3.3	%
TOTAL DEBT RATE MATURITY	$	1,671,442	4.0	3.5	%
TOTAL FIXED OR HEDGED DEBT RATE MATURITY	$	1,465,410	4.5	3.8	%

(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 and 5.4% of SIFMA for tax-free caps.

(2) Includes a $15.2 million mortgage with an embedded cap at a 7% all-in interest rate.

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The following schedule outlines the contractual maturity dates of our total borrowings outstanding as of June 30, 2013 (in thousands):

	Credit Facility Amount Borrowed
Maturity	Fannie Mae Secured		Freddie Mac Secured		Key Bank Unsecured		Other Secured (1)		Other Unsecured		Total
2013	$	—	$	—	$	—	$	—	$	—	$	—
2014	53,721		198,247		—		34,876		—		286,844
2015	120,000		—		125,000		35,187		—		280,187
2016	80,000		—		—		15,200		—		95,200
2017	80,000		—		—		60,180		168,000		308,180
Thereafter	150,515		—		—		258,516		292,000		701,031
Total	$	484,236	$	198,247	$	125,000	$	403,959	$	460,000	$	1,671,442

(1) Chart does not present the principal amortization of property mortgages with amortizing principal balances. The total outstanding balances for these mortgages are presented in the year of the contract's maturity. See cash obligation table below for debt maturity requirement by year including the amortization of these balances.

The following schedule outlines the interest rate maturities of our outstanding interest rate swap agreements and fixed rate debt along with our interest rate caps as of June 30, 2013 (dollars in thousands):

	Fixed		Interest		Total				Interest		Total
	Rate		Rate		Fixed Rate		Contract		Rate		Fixed or
	Debt		Swaps		Balances		Rate		Caps (1)		Hedged
2013	$	—	$	65,000	$	65,000	5.2	%	$	—	$	65,000
2014	34,876		144,000		178,876		5.1	%	46,297		225,173
2015	35,187		75,000		110,187		5.6	%	55,200		165,387
2016	—		—		—		—	%	89,280		89,280
2017	128,180		150,000		278,180		2.7	%	58,948		337,128
Thereafter	550,516		—		550,516		4.7	%	32,926		583,442
Total	$	748,759	$	434,000	$	1,182,759	4.4	%	$	282,651	$	1,465,410

(1) Includes a $15.2 million mortgage with an embedded cap at a 7% all-in interest rate.

We believe that we have adequate resources to fund our current operations, annual refurbishment of our properties, and incremental investment in new apartment properties. We rely on the efficient operation of the financial markets to finance debt maturities, and on FNMA and Freddie Mac, or the Agencies, who have now been placed into conservatorship by the United States government, and whose securities are now implicitly government-guaranteed. The Agencies provide credit enhancement for approximately $682 million of our outstanding debt through credit facilities as of June 30, 2013.

The interest rate markets for FNMA DMBS and Freddie Mac Reference Bills, 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 and cap effectiveness.  Prudential Mortgage Capital, a delegated underwriting and servicing lender for Fannie Mae, markets 90-day Fannie Mae Discount Mortgage Backed Securities 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. Financial Federal, a Freddie Mac Program Plus Lender and Servicer, is obligated to advance funds under the terms of credit agreements between Financial Federal and us.

For the six months ended June 30, 2013, our net cash provided by operating activities was above funding for recurring capital improvements and distributions to unitholders by approximately $18.2 million. This compares to a deficit of approximately $0.9 million for the six months ended June 30, 2012. While we have sufficient liquidity to permit 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 distribution rate.

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The following table reflects our total contractual cash obligations as of June 30, 2013 (dollars in thousands):

Contractual Obligations (1)	2013		2014		2015		2016		2017		Thereafter		Total
Long-Term Debt (2)	$	3,714	$	292,648	$	300,193	$	87,466	$	161,693	$	825,728	$	1,671,442
Fixed Rate or Swapped Interest (3)	22,856		39,619		33,431		30,824		25,612		75,161		227,503
Purchase Obligations (4)	2,331		1,386		—		—		—		—		3,717
Operating Leases	5		9		7		6		6		—		33
Total	$	28,906	$	333,662	$	333,631	$	118,296	$	187,311	$	900,889	$	1,902,695

(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 8 to the financial statements.

(4) Represents development fees.

Off-Balance Sheet Arrangements

At June 30, 2013, and 2012, we did not have any relationships with unconsolidated entities or financial partnerships established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. Mid-America Multifamily Fund I, LLC, a joint venture established to acquire $500 million of apartment communities with redevelopment upside offering value creation opportunity through capital improvements, operating enhancements and restructuring in-place financing, was effectively dissolved during the second quarter of 2013. Mid-America Multifamily Fund II, LLC, our joint venture, was established to acquire $250 million of apartment communities with redevelopment upside offering value creation opportunity through capital improvements, operating enhancements and restructuring in-place financing. As of June 30, 2013, Mid-America Multifamily Fund II, LLC, or Fund II, owned four properties. 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 Financial Statements and Supplementary Data - Notes to Consolidated Financial Statements, Note 12 in the second Current Report on Form 8-K filed by MAA with the SEC on March 22, 2013.

Our investment in our real estate joint venture is unconsolidated and is recorded using the equity method as we do not have a controlling interest.

Insurance

We renegotiated our insurance programs effective July 1, 2013. We believe that the property and casualty insurance program in place 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 operations.

Inflation

Our resident leases at the apartment communities allow, at the time of renewal, for adjustments in the rent payable there under, and thus may enable us to seek rent increases. Almost all 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

In February 2013, the FASB issued Accounting Standards Update, or ASU, No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of Accumulated other comprehensive income, or AOCI, by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the

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current requirements for reporting net income or other comprehensive income in the financial statements. ASU 2013-02 is effective for interim and annual periods beginning after December 15, 2012 and early adoption is permitted. We early adopted ASU 2013-02 for the annual period ended December 31, 2012. The adoption of ASU 2013-02 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In January 2013, the FASB issued ASU No. 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. ASU 2013-01 clarifies that the scope of ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, would apply to derivatives accounted for in accordance with FASB ASC 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with ASC 210-20-45 or ASC 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. This ASU is effective for fiscal years beginning on or after January 1, 2013 and interim periods within those annual periods. We adopted ASU 2013-01 during the period ended March 31, 2013. The adoption of ASU 2013-01 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In May 2011, the FASB issued ASU No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments change the wording, mainly for clarification, used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the Board does not intend for the amendments in this update to result in a change in the application of the requirements in ASU 2011-04. The amendments in this ASU are to be applied prospectively. The amendments are effective during interim and annual periods beginning after December 15, 2011. We adopted ASU 2011-04 for the interim and annual periods of fiscal year 2012. The adoption of ASU 2011-04 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

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 second Current Report on Form 8-K filed by MAA with the SEC on March 22, 2013, except for the changes as discussed under Management’s Discussion and Analysis of Financial Condition and Results of Operations under the “Liquidity and Capital Resources” section, which are incorporated by reference herein.

Controls and Procedures.

Management’s Evaluation of Disclosure Controls and Procedures

Our management, under the supervision and with the participation of our principal executive and financial officers, has evaluated the effectiveness of our disclosure controls and procedures to ensure that the information required to be disclosed by us in the reports that we file or submit under the Exchange Act 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 June 30, 2013 (the end of the period covered by this Current Report on Form 8-K).

Changes in Internal Controls

During the quarter ended June 30, 2013, 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.

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OTHER INFORMATION

Legal Proceedings.

None.

Risk Factors.

In addition to the other information contained in this Current Report on Form 8-K, we have identified the following additional risks and uncertainties that may have a material adverse effect on our business prospects, financial condition or results of operations. Investors should carefully consider the risks described below before making an investment decision. Our business faces significant risks and the risks described below may not be the only risks we face. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations. If any of these risks occur, our business prospects, results of operations or financial condition could suffer, the market price of MAA's common stock (for which our OP Units may be exchanged) and the trading price of our debt securities could decline and you could lose all or part of your investment in the Operating Partnership's securities.

Risks Related to Our Real Estate Investments and Our Operations

Economic slowdown in the United States and downturns in the housing and real estate markets may adversely affect our financial condition and results of operations

There have been significant declines in economic growth, both in the United States and globally. Both the real estate industry and the broader United States economy have experienced unfavorable conditions which adversely affected our revenues. Although our industry and the United States economy showed signs of improvement in 2012 and the first two quarters of 2013, we cannot accurately predict that market conditions will continue to improve in the near future or that our financial condition and results of operations will not continue to be adversely affected. Factors such as weakened economies and related reduction in spending, falling home prices and job losses, price volatility, and/or dislocations and liquidity disruptions in the financial and credit markets could, among other things, impede the ability of our tenants and other parties with which we conduct business to perform their contractual obligations, which could lead to an increase in defaults by our tenants and other contracting parties, which could adversely affect our revenues. Furthermore, our ability to lease our properties at favorable rates, or at all, could be adversely affected by increases in supply and deterioration in multifamily markets and is partially dependent upon the overall level of spending in the economy, which is adversely affected by, among other things, job losses and unemployment levels, recession, personal debt levels, downturns in the housing market, stock market volatility and uncertainty about the future. With regard to our ability to lease our multifamily properties, the increasing rental of excess for-sale condominiums and single family homes, which increases the supply of multifamily units and housing alternatives, may reduce our ability to lease our multifamily units and depress rental rates in certain markets. When we experience a downturn, we cannot predict how long demand and other factors in the real estate market will remain unfavorable, but if the markets remain weak over extended periods of time or deteriorate significantly, our ability to lease our properties or our ability to increase or maintain rental rates in certain markets may weaken, which would adversely affect our revenues.

Failure to generate sufficient cash flows could limit our ability to make payments on our debt and to make distributions

Our ability to generate sufficient cash flow in order to make payments on our debt and to make distributions depends on our ability to generate funds from operations in excess of capital expenditure requirements and/or to have access to the markets for debt and equity financing. Funds from operations and the value of our apartment communities may be insufficient because of factors that are beyond our control. Such events or conditions could include:

• competition from other apartment communities;

• overbuilding of new apartment units or oversupply of available apartment units in our markets, which might adversely affect apartment occupancy or rental rates and/or require rent concessions in order to lease apartment units;

• conversion of condominiums and single family houses to rental use;

• weakness in the overall economy which lowers job growth and the associated demand for apartment housing;

• increases in operating costs (including real estate taxes and insurance premiums) due to inflation and other factors, which may not be offset by increased rents;

• inability to initially, or subsequently after lease terminations, rent apartments on favorable economic terms;

• inability to complete or lease-up development communities on a timely basis, if at all;

• changes in governmental regulations and the related costs of compliance;

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• changes in laws including, but not limited to, tax laws and housing laws including the enactment of rent control laws or other laws regulating multifamily housing;

• withdrawal of government support of apartment financing through its financial backing of the Federal National Mortgage Association, or FNMA, or the Federal Home Loan Mortgage Corporation, or Freddie Mac;

• an uninsured loss, including those resulting from a catastrophic storm, earthquake, or act of terrorism;

• changes in interest rate levels and the availability of financing, borrower credit standards, and down-payment requirements which could lead renters to purchase homes (if interest rates decrease and home loans are more readily available) or increase our acquisition and operating costs (if interest rates increase and financing is less readily available); and

• the relative illiquidity of real estate investments.

At times, we rely on external funding sources to fully fund the payment of distributions to unitholders and our capital investment program, including our existing property expansion developments. While we believe we have sufficient liquidity to permit distributions on our OP units at current rates through additional borrowings, if necessary, any significant and sustained deterioration in operations could result in our financial resources being insufficient to make payments on our debt and to make distributions at the current rate, in which event we would be required to reduce the distribution rate. Any decline in our funds from operations could adversely affect our ability to make distributions and to meet our loan covenants.

We may be adversely affected by new laws and regulations

The current United States administration and Congress have enacted, or called for consideration of, proposals relating to a variety of issues, including with respect to health care, financial regulation reform, climate control, executive compensation and others. We believe that these and other potential proposals could have varying degrees of impact on us ranging from minimal to material. At this time, we are unable to predict with certainty what level of impact specific proposals could have on us.

Certain rulemaking and administrative efforts that may have an impact on us focus principally on the areas perceived as contributing to the global financial crisis and the continuing economic downturn. These initiatives have created a degree of uncertainty regarding the basic rules governing the real estate industry and many other businesses. The federal legislative response in this area has culminated most recently in the enactment on July 21, 2010 of the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act. Many of the provisions of the Dodd-Frank Act have extended implementation periods and delayed effective dates and will require extensive rulemaking by regulatory authorities; thus, the impact on us may not be known for an extended period of time. The Dodd-Frank Act, including future rules implementing its provisions and the interpretation of those rules, along with other legislative and regulatory proposals that are proposed or pending in the United States Congress, may limit our revenues, impose fees or taxes on us, and/or intensify the regulatory framework in which we operate in ways that are not currently identifiable.

Changing laws, regulations and standards relating to corporate governance and public disclosure in particular, including certain provisions of the Dodd-Frank Act and the rules and regulations promulgated thereunder, have created uncertainty for public companies like ours and could significantly increase the costs and risks associated with accessing the United States public markets. Because we are committed to maintaining high standards of internal control over financial reporting, corporate governance and public disclosure, our management team will need to devote significant time and financial resources to comply with these evolving standards for public companies. We intend to continue to invest appropriate resources to comply with both existing and evolving standards, and this investment has resulted and will likely continue to result in increased general and administrative expenses and a diversion of management time and attention from revenue generating activities to compliance activities.

We are dependent on key personnel

Our success depends in part on our and MAA's ability to attract and retain the services of executive officers and other personnel. There is substantial competition for qualified personnel in the real estate industry, and the loss of several of our and MAA's key personnel could have an adverse effect on us.

New acquisitions may fail to perform as expected, and failure to integrate acquired communities and new personnel could create inefficiencies

We intend to actively acquire and improve multifamily communities for rental operations. We may underestimate the costs necessary to bring an acquired community up to standards established for our intended market position. Additionally, to grow successfully, we must be able to apply our experience in managing our existing portfolio of apartment communities to a larger number of properties. We must also be able to integrate new management and operations personnel as our organization grows

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in size and complexity. Failures in either area will result in inefficiencies that could adversely affect our overall results of operations.

We may not be able to sell communities when appropriate

Real estate investments are relatively illiquid and generally cannot be sold quickly. We may not be able to change our portfolio promptly in response to economic or other conditions. Further, we own seven communities, which are subject to restrictions on sale and are required to be exchanged through a 1031b tax-free exchange, unless we pay the tax liability of the contributing partners. This inability to respond promptly to changes in the performance of our investments could adversely affect our financial condition and ability to service our debt and make distributions.

Environmental problems are possible and can be costly

Federal, state and local laws and regulations relating to the protection of the environment may require a current or previous owner or operator of real estate to investigate and clean up hazardous or toxic substances or petroleum product releases at such community. The owner or operator may have to pay a governmental entity or third parties for property damage and for investigation and clean-up costs incurred by such parties in connection with the contamination. These laws typically impose clean-up responsibility and liability without regard to whether the owner or operator knew of or caused the presence of the contaminants. Even if more than one person may have been responsible for the contamination, each person covered by the environmental laws may be held responsible for all of the clean-up costs incurred. In addition, third parties may sue the owner or operator of a site for damages and costs resulting from environmental contamination emanating from that site.

Over the past several years, there have been an increasing number of lawsuits against owners and managers of multifamily properties alleging personal injury and property damage caused by the presence of mold in residential real estate. Some of these lawsuits have resulted in substantial monetary judgments or settlements. We cannot be assured that existing environmental assessments of our communities reveal all environmental liabilities, that any prior owner of any of our properties did not create a material environmental condition not known to us, or that a material environmental condition does not otherwise exist.

Changes in the system for establishing United States accounting standards may materially and adversely affect our reported results of operations

Accounting for public companies in the United States has historically been conducted in accordance with GAAP, which is established by the Financial Accounting Standards Board, or FASB, an independent body whose standards are recognized by the SEC as authoritative for publicly held companies. The International Accounting Standards Board, or IASB, is a London-based independent board established in 2001 and charged with the development of International Financial Reporting Standards, or IFRS. IFRS generally reflects accounting practices that prevail in Europe and in developed nations around the world.

IFRS differs in material respects from GAAP. Among other things, IFRS has historically relied more on “fair value” models of accounting for assets and liabilities than GAAP. “Fair value” models are based on periodic revaluation of assets and liabilities, often resulting in fluctuations in such values as compared to GAAP, which relies more frequently on historical cost as the basis for asset and liability valuation.

It is unclear at this time if or how the SEC will transition from GAAP to IFRS. Switching to a new method of accounting and adopting IFRS will be a complex undertaking. We may need to develop new systems and controls based on the principles of IFRS. Since these are new endeavors, and the precise requirements of the pronouncements ultimately adopted are not known, the magnitude of costs associated with this conversion is uncertain.

We are currently evaluating the impact of the adoption of IFRS on our financial position and results of operations. Such evaluation cannot be completed, however, without more clarity regarding the specific IFRS standards that will be adopted. Until there is more certainty with respect to the IFRS standards to be adopted, prospective investors should consider that our conversion to IFRS could have a material adverse impact on our reported results of operations.

Losses from catastrophes may exceed our insurance coverage

We carry comprehensive liability and property insurance on our communities and intend to obtain similar coverage for communities we acquire in the future. Some losses, generally of a catastrophic nature, such as losses from floods, hurricanes or earthquakes, are subject to limitations, and thus may be uninsured. We exercise our discretion in determining amounts, coverage limits and deductibility provisions of insurance, with a view to maintaining appropriate insurance on our investments at a reasonable cost and on suitable terms. If we suffer a substantial loss, our insurance coverage may not be sufficient to pay the full current market value or current replacement value of our lost investment. Inflation, changes in building codes and

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ordinances, environmental considerations and other factors also might make it infeasible to use insurance proceeds to replace or rebuild a property after it has been damaged or destroyed.

Increasing real estate taxes and insurance costs may negatively impact operating results

As a result of our substantial real estate holdings, the cost of real estate taxes and insuring our apartment communities is a significant component of expense. Real estate taxes and insurance premiums are subject to significant increases and fluctuations, which are, in large part, outside of our control. If the costs associated with real estate taxes and insurance should rise, our operating results could be negatively impacted, and our ability to service our debts and make distributions could be adversely affected.

We may experience increased costs arising from health care reform

In March 2010, the United States government enacted comprehensive health care reform legislation which, among other things, includes guaranteed coverage requirements, eliminates pre-existing condition exclusions and annual and lifetime maximum limits, restricts the extent to which policies can be rescinded and imposes new and significant taxes on health insurers and health care benefits. The legislation imposes implementation effective dates beginning in 2010 and extending through 2020, and many of the changes require additional guidance from government agencies or federal regulations. On June 28, 2012, the United States Supreme Court upheld the constitutionality of the health care reform legislations mandate to purchase health insurance but struck down a provision allowing the federal government to withhold Medicaid funds unless a state agrees to the expansion of Medicaid eligibility. Therefore, due to the phased-in nature of the implementation and the lack of interpretive guidance it is difficult to determine at this time what impact the health care reform legislation will have on our financial results. Possible adverse effects of the health reform legislation include increased costs, exposure to expanded liability and requirements for us to revise ways in which we provide healthcare and other benefits to our employees. In addition, our results of operations, financial position and cash flows could be materially adversely affected.

Property insurance limits may be inadequate, and deductibles may be significant in the event of a catastrophic loss or a series of major losses, which may cause a breach of loan covenants

We have a significant proportion of our assets in areas exposed to windstorms and to the New Madrid seismic zone. A major wind or earthquake loss, or series of losses, could require that we pay significant deductibles as well as additional amounts above the per occurrence limit of our insurance for these risks. We may then be judged to have breached one or more of our loan covenants, and any of the foregoing events could have a material adverse effect on our assets, financial condition, and results of operation.

Compliance or failure to comply with laws requiring access to our properties by disabled persons could result in substantial cost

The Americans with Disabilities Act, the Fair Housing Act of 1988 and other federal, state and local laws generally require that public accommodations be made accessible to disabled persons. Noncompliance could result in the imposition of fines by the government or the award of damages to private litigants. These laws may require us to modify our existing communities. These laws may also restrict renovations by requiring improved access to such buildings by disabled persons or may require us to add other structural features that increase our construction costs. Legislation or regulations adopted in the future may impose further burdens or restrictions on us with respect to improved access by disabled persons. We cannot ascertain the costs of compliance with these laws, which may be substantial.

Development and construction risks could impact our profitability

Currently, we have two development communities under construction totaling 564 units as of June 30, 2013. We have completed 96 units for the development projects as of June 30, 2013.  Our development and construction activities are subject to the following risks:

• we may be unable to obtain, or face delays in obtaining, necessary zoning, land-use, building, occupancy and other required governmental permits and authorizations, which could result in increased development costs, could delay initial occupancy dates for all or a portion of a development community, and could require us to abandon our activities entirely with respect to a project for which we are unable to obtain permits or authorizations;

• yields may be less than anticipated as a result of delays in completing projects, costs that exceed budget or higher than expected concessions for lease up and lower rents than expected;

• bankruptcy of developers in our development projects could impose delays and costs on us with respect to the development of our communities and may adversely affect our financial condition and results of operations;

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• we may abandon development opportunities that we have already begun to explore, and we may fail to recover expenses already incurred in connection with exploring such opportunities;

• we may be unable to complete construction and lease-up of a community on schedule, or incur development or construction costs that exceed our original estimates, and we may be unable to charge rents that would compensate for any increase in such costs;

• occupancy rates and rents at a newly developed community may fluctuate depending on a number of factors, including market and economic conditions, preventing us from meeting our profitability goals for that community; and

• when we sell to third parties communities or properties that we developed or renovated, we may be subject to warranty or construction defects that are uninsured or exceed the limit of our insurance.

Additionally, the time frame required for development and construction of these properties means that we may have to wait a few years for a significant cash return. As a REIT, MAA is required to make cash distributions to its shareholders. If our cash flows from operations are not sufficient, we may be forced to borrow to fund our distributions to MAA that enable MAA to pay necessary distributions to its shareholders and or unitholders, which could affect our ability to meet our other obligations.

Risks Related to Our Indebtedness and Financing Activities

A change in United States government policy with regard to FNMA and Freddie Mac could impact our financial condition

On February 11, 2011, the Obama Administration released a report to Congress which included options, among others, to gradually shrink and eventually shut down FNMA and Freddie Mac. In August 2011, Standard & Poor's Rating Services downgraded the credit ratings of FNMA and Freddie Mac from AAA to AA+. We do not know when or if FNMA or Freddie Mac will restrict their support of lending to the multifamily industry or to us in particular. As of June 30, 2013, 41% of our outstanding debt was borrowed through credit facilities provided by or credit-enhanced by FNMA or Freddie Mac with agency rate-based maturities ranging from 2013 through 2018. While the report to Congress recognized the critically important role that FNMA and Freddie Mac play in the housing finance market and committed to ensuring they have sufficient capital to perform under any guarantees issued now or in the future and the ability to meet any of their debt obligations, should they be unable to meet their obligations it would have a material adverse effect on both us and the multifamily industry, and we would seek alternative sources of funding, which may not be available on terms acceptable to us, or at all. This could jeopardize the effectiveness of our interest rate swaps, require us to post collateral up to the market value of the interest rate swaps, and either of these occurrences could potentially cause a breach in one or more of our loan covenants, and through reduced loan availability, impact the value of multifamily assets, which could impair the value of our properties.

Our financing could be impacted by negative capital market conditions

Over the past several years, domestic financial markets have experienced unusual volatility and uncertainty. Liquidity tightened in financial markets, including the investment grade debt, the commercial mortgage backed securities, or CMBS, commercial paper, and equity capital markets. We have seen an increase in the volatility of short term interest rates and changes in historic relationships between LIBOR (which is the basis for the majority of the payments to us by our swap counterparties) and the actual interest rate we pay through the FNMA Discount Mortgage Backed Security, or DMBS, and the Freddie Mac Reference Bill programs. This creates a risk that our interest expense will fluctuate to a greater extent than it has in the past, and it makes forecasting more difficult. Were our credit arrangements with Prudential Mortgage Capital, credit-enhanced by FNMA, or with Financial Federal, credit-enhanced by Freddie Mac, to fail, or their ability to lend money to finance apartment communities to become impaired or cease, we would have to seek alternative sources of capital, which might not be available on terms acceptable to us, if at all. In addition, any such event would most likely cause our interest costs to rise. This could also cause our interest rate swaps and caps to become ineffective, triggering a default in one or more of our credit agreements. If any of the foregoing events were to occur, it could have a material adverse effect on our business, financial condition and prospects.

A change in the value of our assets could cause us to experience a cash shortfall, to be in default of our loan covenants, or to incur a charge for the impairment of assets

We borrow on both a secured and unsecured basis. Certain of our debt agreements require us to post collateral and a significant reduction in the value of our assets could require us to post additional collateral. While we believe that we have significant excess collateral and capacity, future asset values are uncertain. If we were unable to meet a request to add collateral to a credit facility, this would have a material adverse effect on our liquidity and our ability to meet our loan covenants. We may determine that the value of an individual asset, or group of assets, was irrevocably impaired, and that we may need to record a charge to write-down the value of the asset to reflect its current value.

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Debt level, refinancing and loan covenant risk may adversely affect our financial condition and operating results and MAA's ability to maintain its status as a REIT

At June 30, 2013, we had total debt outstanding of $1.7 billion. Payments of principal and interest on borrowings may leave us with insufficient cash resources to operate the apartment communities, to pay distributions to our unitholders and/or to pay distributions to MAA's shareholders that are required to be paid in order for MAA to maintain its qualification as a REIT. MAA currently intends to limit its total debt to a range of approximately 40% to 55% of the undepreciated book value of its assets. MAA's charter and bylaws do not limit its debt levels and the Board of Directors can modify this policy at any time, which could allow MAA to become more highly leveraged. MAA may also issue new equity to maintain its debt within the target range. Covenants in MAA's credit facilities limit its net-debt (total debt less cash on hand) to undepreciated book value to 60%. As of June 30, 2013, MAA's ratio of net-debt to undepreciated book value was approximately 43% and the Operating Partnership's ratio of net-debt to undepreciated book value was approximately 47%. In addition, MAA must repay its debt upon maturity, and the inability to access debt or equity capital at attractive rates could adversely affect its financial condition and/or our funds from operations. MAA relies on its lenders for debt financing and has agreements with the lenders that require it to comply with certain covenants, including maintaining adequate collateral that is subject to revaluation annually. The breach of any one of these covenants would place MAA in default with its lenders and may have serious consequences on our operations.

Interest rate hedging may not be effective

We rely on the financial markets to refinance debt maturities, and also are heavily reliant on the Agencies, which provided credit or credit enhancement for the majority of our outstanding debt as of June 30, 2013. The debt is provided under the terms of credit facilities with Prudential Mortgage Capital (credit-enhanced by FNMA) and Financial Federal (credit-enhanced by Freddie Mac). We pay fees to the credit facility providers and the Agencies plus interest, which is based on the FNMA DMBS rate and the Freddie Mac Reference Bill Rate.

The interest rate market for the FNMA DMBS rate and the Freddie Mac Reference Bill Rate, both of which have been highly correlated with LIBOR interest rates, are also an important component of our liquidity and interest rate swap and cap effectiveness. In our experience, the FNMA DMBS rate has historically averaged 17 basis points below three-month LIBOR, and the Freddie Mac Reference Bill rate has averaged 31 basis points below the associated LIBOR rate, but in the past four years the spreads increased significantly and have been more volatile than we have historically seen. We cannot forecast when or if the uncertainty and volatility in the market may change. Continued unusual volatility over a period of time could cause us to lose hedge accounting treatment for our interest rate swaps and caps, resulting in material changes to our consolidated statements of operations and balance sheet, and potentially cause a breach with one of our debt covenants.

Fluctuations in interest rate spreads between the DMBS and Reference Bill rates and three-month LIBOR causes ineffectiveness to flow through interest expense in the current period if we are in an overhedged position, and together with the unrecognized ineffectiveness, reduces the effectiveness of the swaps and caps.

We also rely on the credit of the counterparties that provide swaps and caps to hedge the interest rate risk on our credit facilities. We use five major banks to provide approximately 98% of our derivative fair value, all of which have investment grade ratings from Moody’s and S&P. In the event that one of our derivative providers should suffer a significant downgrade of its credit rating or fail, our swaps or caps may become not effective, in which case all or a portion of the fair value of the swap or cap would be recorded to earnings, possibly causing a substantial loss sufficient to cause a breach of our debt covenants.

One or more interest rate swap or cap counterparties could default, causing us significant financial exposure

We enter into interest rate swap and interest rate cap agreements only with counterparties that are highly rated (A or above by Standard & Poor's, or Aa3 or above by Moody’s). We also try to diversify our risk amongst several counterparties. In the event one or more of these counterparties were to go into liquidation or to experience a significant rating downgrade, this could cause us to liquidate the interest rate swap or to lose the interest rate protection of an interest rate cap. Liquidation of an interest rate swap could cause us to be required to pay the swap counterparty the net present value of the swap, which may represent a significant current period cash charge, possibly sufficient to cause us to breach our debt covenants.

Variable interest rates may adversely affect funds from operations

At June 30, 2013, effectively $206.0 million of our debt bore interest at a variable rate and was not hedged by interest rate swaps or caps. We may incur additional debt in the future that also bears interest at variable rates. Variable rate debt creates higher debt service requirements if market interest rates increase, which would adversely affect our funds from operations and the amount of cash available to service our debt and to pay distributions. Our $863.4 million in secured credit facilities with Prudential Mortgage Capital, credit enhanced by FNMA, are predominately floating rate facilities. We also have a credit facility with Freddie Mac totaling $200.0 million that is a variable rate facility. At June 30, 2013, a total of $682.5 million was

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outstanding under these facilities. These facilities represent the majority of the variable interest rates we were exposed to at June 30, 2013. Large portions of the interest rates on these facilities have been hedged by means of a number of interest rate swaps and caps. Upon the termination of these swaps and caps, we will be exposed to the risks of varying interest rates unless acceptable replacement swaps or caps are obtainable.

Issuances of additional debt or equity may adversely impact our financial condition

Our capital requirements depend on numerous factors, including the occupancy and turnover rates of our apartment communities, development and capital expenditures, costs of operations and potential acquisitions. We cannot accurately predict the timing and amount of our capital requirements. If our capital requirements vary materially from our plans, we may require additional financing sooner than anticipated. Accordingly, we could become more leveraged, resulting in increased risk of default on our obligations and in an increase in our debt service requirements, both of which could adversely affect our financial condition and ability to access debt and equity capital markets in the future. If we issue additional equity securities to obtain additional financing, the interest of our existing unitholders could be diluted.

Risks Related to Our Organization and Ownership of OP Units

Our existing unitholders have limited approval rights, which may prevent our sole general partner, MAA, from completing a change of control transaction that may be in the best interests of all unitholders and of all the shareholders of MAA

MAA may not engage in a sale or other disposition of all or substantially all of the assets of the Operating Partnership, dissolve the Operating Partnership or, upon the occurrence of certain triggering events, take any action that would result in any unitholder realizing taxable gain, without the approval of the holders of a majority of the outstanding OP Units held by holders other than MAA or its affiliates, or Class A OP Units. The right of the holders of our Class A OP Units to vote on these transactions could limit MAA's ability to complete a change of control transaction that might otherwise be in the best interest of all of our unitholders and all shareholders of MAA.

In certain circumstances, our unitholders must approve our sale of certain properties contributed by the unitholders

In certain circumstances as detailed in the Partnership Agreement, we may not sell or otherwise transfer certain properties unless each person who was a partner in the limited partnership holding such properties at the time of its merger into our Operating Partnership approves such sale or transfer. The exercise of these approval rights by our unitholders could delay or prevent us from completing a transaction that may be in the best interest of all of our unitholders and all shareholders of MAA.

MAA, their officers and directors have substantial influence over our affairs.

MAA, as our sole general partner and acting through its officers and directors, has a substantial influence on our affairs. MAA, their officers and directors could exercise their influence in a manner that is not in the best interest of our unitholders. Also, MAA owns approximately 95.9% of the OP Units and as such, will have substantial influence on the outcome of any matters submitted to our unitholders for approval.

MAA's ownership limit restricts the transferability of its capital stock

MAA's charter limits ownership of its capital stock by any single shareholder to 9.9% of all outstanding shares of its capital stock, both common and preferred, unless approved by the Board of Directors. The charter also prohibits anyone from buying shares if the purchase would result in MAA losing REIT status. This could happen if a share transaction results in fewer than 100 persons owning all of MAA's shares or in five or fewer persons, applying certain broad attribution rules of the Code, owning 50% or more of MAA's shares (by value). If you acquire shares of MAA's common stock in excess of the ownership limit or in violation of the ownership requirements of the Code for REITs, MAA:

• will consider the transfer to be null and void;

• will not reflect the transaction on MAA's books;

• may institute legal action to enjoin the transaction;

• will not pay dividends or other distributions with respect to those shares;

• will not recognize any voting rights for those shares;

• will consider the shares held in trust for MAA's benefit; and

• will either direct you to sell the shares and turn over any profit to MAA, or MAA will redeem the shares. If MAA redeems the shares, you will be paid a price equal to the lesser of:

◦ the principal price paid for the shares by the holder,

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◦ a price per share equal to the market price (as determined in the manner set forth in MAA's charter) of the applicable capital stock,

◦ the market price (as so determined) on the date such holder would, but for the restrictions on transfers set forth in MAA's charter, be deemed to have acquired ownership of the shares and

◦ the maximum price allowed under Tennessee Greenmail Act (such price being the average of the highest and lowest closing market price for the shares during the 30 trading days preceding the purchase of such shares or, if the holder of such shares has commenced a tender offer or has announced an intention to seek control of MAA, during the 30 trading days preceding the commencement of such tender offer or the making of such announcement).

The redemption price may be paid, at MAA's option, by delivering one common unit (subject to adjustment from time to time in the event of, among other things, stock splits, stock dividends, or recapitalizations affecting MAA's common stock or certain mergers, consolidations or asset transfers by MAA) issued by the Operating Partnership for each Excess Share being redeemed.

Provisions of MAA's charter and Tennessee law may limit the ability of a third party to acquire control of MAA in a transaction beneficial to our unitholders

Ownership Limit

While the 9.9% ownership limit discussed above helps preserve MAA's status as a REIT, it could also delay or prevent any person or small group of persons from acquiring, or attempting to acquire control of MAA and its subsidiaries, including the Operating Partnership, in a transaction beneficial to our unitholders.

Preferred Stock

MAA's charter authorizes the Board of Directors to issue up to 20,000,000 shares of preferred stock. The Board of Directors may establish the preferences and rights of any preferred shares issued. The issuance of preferred stock could also have the effect of delaying or preventing someone from taking control of MAA even if a change in control were in our unitholders’ best interests. As of June 30, 2013, no shares of preferred stock were issued and outstanding. When MAA issues preferred stock, generally the proceeds are contributed to the Operating Partnership in exchange for a number of OP Units with the same terms equal to the number of preferred shares issued by MAA.

Our investments in joint ventures may involve risks

Investments in joint ventures may involve risks that may not otherwise be present in our direct investments such as:

• the potential inability of our joint venture partner to perform;

• the joint venture partner may have economic or business interests or goals which are inconsistent with or adverse to ours;

• the joint venture partner may take actions contrary to our requests or instructions or contrary to our objectives or policies; and

• the joint venturers may not be able to agree on matters relating to the property they jointly own.

Although each joint owner will have a right of first refusal to purchase the other owner’s interest, in the event a sale is desired, the joint owner may not have sufficient resources to exercise such right of first refusal. 

The number of shares of MAA's common stock available for future sale could adversely affect the market price of MAA's publicly traded securities

We have issued OP Units in exchange for properties or interests in properties, and, from time to time, we may issue additional OP Units in connection with acquisitions of properties or otherwise. MAA is the sole general partner of the Operating Partnership, and, as of June 30, 2013, MAA owned 40,141,197 OP Units, representing a 95.9% interest in the Operating Partnership, while the remaining 1,707,660 outstanding OP Units were held by limited partners of the Operating Partnership. Our unitholders (other than MAA and its affiliates) may require MAA to redeem their OP Units from time to time, in which case MAA may, at its option, pay the redemption price either in cash (in an amount per 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's common stock (subject to adjustment under specified circumstances) for each OP Unit so redeemed. In addition, we have registered all of the 1,707,660 shares of MAA's common stock which, as of June 30, 2013, 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

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OP Units are issued to limited partners of the Operating Partnership, MAA 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 MAA issues shares of its common stock upon the redemption of OP Units in the Operating Partnership, sales of substantial amounts of such shares of MAA's common stock, or the perception that these sales could occur, may adversely affect prevailing market prices for MAA's common stock or may impair MAA's ability to raise capital through the sale of its common stock or other equity securities.

Market interest rates and low trading volume may have an adverse effect on the market value of MAA's common stock, which would affect the redemption price of our OP Units

The market price of shares of a REIT may be affected by the distribution rate on those shares, as a percentage of the price of the shares, relative to market interest rates. If market interest rates increase, prospective purchasers of MAA's shares may expect a higher annual distribution rate. Higher interest rates would not, however, result in more funds for MAA to distribute and, in fact, would likely increase MAA's borrowing costs and potentially decrease funds available for distribution. This could cause the market price of MAA's common stock to go down, which would reduce the price received upon redemption of any of our OP Units, or if MAA so elects, the value of MAA's common stock received in lieu of cash upon redemption of such OP Units. In addition, although MAA's stock is listed on The New York Stock Exchange, the daily trading volume of MAA's shares may be lower than the trading volume for companies in other industries. As a result, MAA's investors who desire to liquidate substantial holdings may find that they are unable to dispose of their shares in the market without causing a substantial decline in the market value of the shares.

Changes in market conditions or a failure to meet the market’s expectations with regard to MAA's results of operations and cash distributions could adversely affect the market price of MAA's common stock, which may reduce the amount of cash available to the Operating Partnership to meet its obligations

We believe that the market value of a REIT’s equity securities is based primarily upon the market’s perception of the REIT’s growth potential and its current and potential future cash distributions, and is secondarily based upon the real estate market value of the underlying assets. For that reason, MAA's common stock may trade at prices that are higher or lower than the net asset value per share. To the extent MAA retains operating cash flow for investment purposes, working capital reserves or other purposes, these retained funds, while increasing the value of MAA's underlying assets, may not correspondingly increase the market price of MAA's common stock. In addition, we are subject to the risk that our cash flow will be insufficient to service our debt and to pay distributions to our unitholders, which may cause MAA to not have the funds to service its debt or to pay dividends to its shareholders. MAA's failure to meet the market’s expectations with regard to future results of operations and cash distributions would likely adversely affect the market price of its shares and thus potentially reduce MAA's ability to contribute funds from issuances down to the Operating Partnership, resulting in lower level of cash available for investment or to service our debt or to make distributions to our unitholders.

The stock markets, including the NYSE, on which MAA lists its common stock, have experienced significant price and volume fluctuations. As a result, the market price of MAA's common stock could be similarly volatile, and investors may experience a decrease in the value of their shares, including decreases unrelated to MAA's operating performance or prospects. Among the market conditions that may affect the market price of MAA and the Operating Partnership's securities are the following:

• our financial condition and operating performance and the performance of other similar companies;

• actual or anticipated differences in our quarterly and annual operating results;

• changes in our revenues or earnings estimates or recommendations by securities analysts;

• publication of research reports about us or our industry by securities analysts;

• additions and departures of key personnel;

• inability to access the capital markets;

• strategic decisions by us or our competitors, such as acquisitions, dispositions, spin-offs, joint ventures, strategic investments or changes in business strategy;

• the issuance or sale of additional shares of MAA's common stock, or the perception that such sales may occur, including under the at-the-market controlled equity offering programs;

• the reputation of REITs generally and the reputation of REITs with portfolios similar to ours;

• the attractiveness of the securities of REITs in comparison to securities issued by other entities, including securities issued by other real estate companies;

• an increase in market interest rates, which may lead prospective investors to demand a higher distribution rate in relation to the price paid for shares of MAA's common stock;

• the passage of legislation or other regulatory developments that adversely affect us or our industry;

• speculation in the press or investment community;

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• actions by institutional shareholders or hedge funds;

• changes in accounting principles;

• terrorist acts; and

• general market conditions, including factors unrelated to our performance.

In the past, securities class action litigation has often been instituted against companies following periods of volatility in their stock price. This type of litigation could result in substantial costs and divert our management’s attention and resources.

The proposed mergers with Colonial Properties Trust and Colonial Realty Limited Partnership present certain risks to our business and operations.

In June 2013, we entered into an agreement and plan of merger with Colonial Properties Trust, or Colonial, and Colonial Realty Limited Partnership, or Colonial LP, which provides for the merger of Colonial with and into us and the merger of Colonial LP with and into a transitory subsidiary of MAALP, or collectively, the mergers. Pursuant to the terms and subject to the conditions set forth in the agreement and plan of merger, at the respective effective time of the mergers, each outstanding common share of Colonial beneficial interest will be converted into the right to receive 0.360 shares of our common stock, and each outstanding Class A Unit of Colonial Realty Limited Partnership will be converted into the right to receive 0.360 Class A Common Units of MAALP. We expect to complete the transaction in the third quarter of 2013, although we cannot assure you that the transaction will close on such timetable or at all.

Prior to closing, the mergers may present certain risks to our business and operations, including, among other things, that:

• if the mergers do not occur, we may incur payment obligations to Colonial;

• failure to complete the merger could negatively impact our stock price and our future business and financial results;

• we expect to incur substantial expenses related to the merger; and

• the pendency of the merger could adversely affect our business and operations.

In addition, certain risks may continue to exist after the closing of the merger, including, among other things, that;

• we may be unable to successfully integrate our business and Colonial's business successfully and realize the anticipated benefits of the mergers or do so within the anticipated timeframe;

• we may be unable to retain key employees;

• the merger will result in changes to our board of directors and management that may affect our strategy;

• our future results will suffer if we do not effectively manage our expanded operations;

• the market price of our common stock may decline as a result of the mergers; and

• we cannot assure you that we will be able to continue paying dividends at the current rate.

Risks Related to Tax Laws

Failure to qualify as a REIT would cause MAA to be taxed as a corporation, which would substantially reduce our funds available for payment of distributions to our unitholders

If MAA failed to qualify as a REIT for federal income tax purposes, MAA would be taxed as a corporation. The Internal Revenue Service may challenge MAA's qualification as a REIT for prior years, and new legislation, regulations, administrative interpretations or court decisions may change the tax laws with respect to qualification as a REIT or the federal tax consequences of such qualification. For any taxable year that MAA fails to qualify as a REIT, MAA, on a consolidated basis, would be subject to federal income tax on its taxable income at corporate rates, plus any applicable alternative minimum tax. In addition, unless entitled to relief under applicable statutory provisions, MAA would be disqualified from treatment as a REIT for the four taxable years following the year during which qualification is lost. This treatment would reduce our cash available for investment, to service our debt or to make distributions to our unitholders and MAA for MAA's distributions to its shareholders because of the additional tax liability for the year or years involved. This would likely adversely affect the value of your investment in us. We might be required to borrow funds or to liquidate some of our investments to pay any applicable tax resulting from MAA's failure to qualify as a REIT. In addition, MAA's distributions would no longer qualify for the dividends paid deduction nor be required to be made in order to preserve REIT status, reducing the incentive to make such distributions on our OP Units and MAA's common and preferred stock.

41

Failure to make required distributions to MAA's shareholders would subject MAA to income taxation, which would reduce our funds available for payment of distributions to our unitholders

In order to qualify as a REIT, each year MAA must distribute to its shareholders at least 90% of taxable income (determined without regard to the dividends paid deduction and by excluding net capital gains). To the extent that MAA satisfies the distribution requirement, but distributes less than 100% of taxable income, MAA will be subject to federal corporate income tax on the undistributed income. In addition, MAA would incur a 4% nondeductible excise tax on the amount, if any, by which its distributions in any year are less than the sum of:

• 85% of ordinary income for that year;

• 95% of capital gain net income for that year; and

• 100% of undistributed taxable income from prior years.

Differences in timing between the recognition of income and the related cash receipts or the effect of required debt amortization payments could require us to borrow money or sell assets to pay out enough distributions to MAA as a unitholder so that it can pay out enough of its taxable income to satisfy the distribution requirement and to avoid corporate income tax and the 4% nondeductible excise tax in a particular year.

Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Defaults Upon Senior Securities.

None.

Mine Safety Disclosures.

Not applicable.

Other Information.

None.

42

XML

Derivatives and Hedging Activities Derivatives and Hedging Activities (Policies)

6 Months Ended

Jun. 30, 2013

Derivatives and Hedging Activities [Abstract]

Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block]

Derivatives not designated as hedges are not speculative and are used to manage MAALP's exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of FASB ASC 815, Derivatives and Hedging. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings and resulted in a gain of $10,000 for the three months ended June 30, 2013 and a loss of $9,000 for the three months ended June 30, 2012. During the six months ended June 30, 2013 and 2012, we recognized a loss of $3,000 and $33,000, respectively, on derivatives not designated in hedging relationships.

XML

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic and Diluted Share	$ 0.77	$ 0.35	$ 0.79	$ 0.61
Operating revenues:
Rental revenues	$ 111,320,000	$ 98,119,000	$ 219,373,000	$ 191,089,000
Other property revenues	9,804,000	8,894,000	19,139,000	17,399,000
Total property revenues	121,124,000	107,013,000	238,512,000	208,488,000
Management fee income	141,000	209,000	319,000	478,000
Total operating revenues	121,265,000	107,222,000	238,831,000	208,966,000
Property operating expenses:
Personnel	13,213,000	12,128,000	25,987,000	24,194,000
Building repairs and maintenance	3,540,000	3,352,000	6,414,000	6,558,000
Real estate taxes and insurance	14,822,000	12,702,000	29,189,000	24,783,000
Utilities	6,300,000	5,888,000	12,290,000	11,198,000
Landscaping	2,593,000	2,320,000	5,214,000	4,739,000
Other operating	8,254,000	7,553,000	15,988,000	14,793,000
Depreciation and amortization	29,772,000	27,415,000	59,506,000	53,572,000
Total property operating expenses	78,494,000	71,358,000	154,588,000	139,837,000
Acquisition (credit) expenses	489,000	389,000	499,000	409,000
Property management expenses	4,282,000	4,961,000	9,060,000	9,885,000
General and administrative expenses	2,410,000	2,816,000	5,300,000	5,845,000
Merger Related Expenses	5,737,000	0	5,737,000	0
Income from continuing operations before non-operating items	29,853,000	27,698,000	63,647,000	52,990,000
Interest and other non-property income	(5,000)	84,000	13,000	198,000
Interest expense	(14,159,000)	(12,577,000)	(28,190,000)	(25,253,000)
Gain on debt extinguishment	(1,000)	(15,000)	(62,000)	5,000
Amortization of deferred financing costs	(763,000)	(753,000)	(1,528,000)	(1,409,000)
Net casualty loss and other settlement proceeds	438,000	0	454,000	(9,000)
Income from continuing operations before loss from real estate joint ventures	15,363,000	14,434,000	34,334,000	26,519,000
Loss from real estate joint ventures	48,000	(69,000)	102,000	(100,000)
Income from continuing operations	15,411,000	14,365,000	34,436,000	26,419,000
Discontinued operations:
(Loss) income from discontinued operations before gain on sale	721,000	1,105,000	1,414,000	2,160,000
Net casualty loss on insurance and other settlement proceeds on discontinued operations	(5,000)	(2,000)	(5,000)	(56,000)
Gain on sale of discontinued operations	31,780,000	12,953,000	31,780,000	22,382,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	47,907,000	28,421,000	67,625,000	50,905,000
Net income attributable to noncontrolling interests	160,000	135,000	319,000	283,000
Net income attributable to MAA	47,747,000	28,286,000	67,306,000	50,622,000
Net income available for common shareholders	47,747,000	28,286,000	67,306,000	50,622,000
Earnings per common share - basic:
Earnings Per Share, Basic and Diluted	$ 1.14	$ 0.70	$ 1.61	$ 1.27
Dividends declared per common share	$ 0.6950	$ 0.6600	$ 1.3900	$ 1.3200
Income from continuing operations available for common unitholders	$ 0.37	$ 0.35	$ 0.82	$ 0.66
Loss on sale of non-depreciable assets	0	(3,000)	0	(3,000)
Disposal Groups, Including Discontinued Operations, Name [Member]
Operating revenues:
Rental revenues	1,984,000	5,341,000	4,317,000	11,143,000
Other property revenues	129,000	514,000	296,000	1,085,000
Total operating revenues	2,113,000	5,855,000	4,613,000	12,228,000
Property operating expenses:
Total property operating expenses	948,000	2,879,000	2,059,000	6,164,000
Interest expense	(73,000)	(330,000)	(154,000)	(705,000)
Discontinued operations:
(Loss) income from discontinued operations before gain on sale			1,414,000	2,160,000
Net casualty loss on insurance and other settlement proceeds on discontinued operations			(5,000)	(56,000)
Gain on sale of discontinued operations			$ 31,780,000	$ 22,382,000

XML

Real Estate Acquisitions

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Real Estate Acquisitions

 Real Estate Acquisitions

On May 1, 2013, MAALP purchased Greenwood Forest, a 316-unit apartment community located in Greenwood Forest (Houston), Texas. This property was previously a part of Mid-America Multifamily Fund I, LLC.

On May 21, 2013, MAALP purchased Station Square at Cosner's Corner, a 260-unit apartment community located in Fredericksburg, Virginia. As part of this purchase, MAALP also acquired land for future development.

XML

Fair Value Disclosure of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	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
							June 30, 2013
Assets
Derivative financial instruments	$	—	$	10,688	$	—	$	10,688
Liabilities
Derivative financial instruments	$	—	$	11,907	$	—	$	11,907

	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, 2012
Assets
Derivative financial instruments	$	—	$	288	$	—	$	288
Liabilities
Derivative financial instruments	$	—	$	21,423	$	—	$	21,423

XML

Consolidation and Basis of Presentation and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Earnings Per Common Share

(dollars and units in thousands, except per unit amounts)	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Units Outstanding
Weighted average common units - basic and diluted	41,841		40,392		41,679		39,763
Calculation of Earnings per Unit - basic and diluted
Income from continuing operations	$	15,411	$	14,365	$	34,436	$	26,419
Income from continuing operations attributable to noncontrolling interests	51		68		162		147
Income from continuing operations available for common unitholders, adjusted	$	15,360	$	14,297	$	34,274	$	26,272
Income from discontinued operations	$	32,496	$	14,056	$	33,189	$	24,486
Income from discontinued operations attributable to noncontrolling interests	109		67		157		136
Income from discontinued operations available for common unitholders, adjusted	$	32,387	$	13,989	$	33,032	$	24,350
Earnings per unit - basic and diluted:
Income from continuing operations available for common unitholders	$	0.37	$	0.35	$	0.82	$	0.66
Income from discontinued operations available for common unitholders	0.77		0.35		0.79		0.61
Net income available for common unitholders	$	1.14	$	0.70	$	1.61	$	1.27

XML

Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain	$ (10,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(6,500,000)	(33,377,000)	(6,500,000)	(33,377,000)	(26,881,000)	(38,579,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax			11,904,000	(5,293,000)
Derivative Instruments Not Designated as Hedging Instruments, Loss		(9,000)	(3,000)	(33,000)
Credit Risk Derivatives, description of contingent features			Certain of our derivative contracts contain a provision where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. As of June 30, 2013, 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 their termination value of $8.5 million.
Derivative contracts, collateral			Certain of our derivative contracts are credit enhanced by either FNMA or Freddie Mac.  These derivative contracts require that our credit enhancing party maintain credit ratings above a certain level.  If our credit support providers were downgraded below Baa1 by Moody’s or BBB+ by Standard & Poor’s, or S&P, we may be required to either post 100 percent collateral or settle the obligations at their termination value of $12.5 million as of June 30, 2013.  Both FNMA and Freddie Mac are currently rated Aaa by Moody’s and AA+ by S&P, and therefore, the provisions of this agreement have not been breached and no collateral has been posted related to these agreements as of June 30, 2013.
Credit Risk Related Contingent Features Termination Value	12,500,000		12,500,000
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax			(8,477,000)	(10,495,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent			20,381,000	5,202,000
Credit Default Option [Member]
Derivative [Line Items]
Credit Risk Related Contingent Features Termination Value	200,000		200,000
Other Credit Enhancements
Derivative [Line Items]
Credit Risk Related Contingent Features Termination Value	8,500,000		8,500,000
Termination
Derivative [Line Items]
Fair Value of Credit Risk Derivatives	11,900,000		11,900,000
Interest Expense
Derivative [Line Items]
Change in Fair Value of Derivatives, Ineffective portion	23,000	23,000	26,000	33,000
Interest Expense | Cash Flow Hedges of Interest Rate Risk | Interest Rate Caps
Derivative [Line Items]
Change in fair value of interest rate derivatives included in AOCI and expected to be reclassified in the next 12 months			10,900,000
net liability position [Member]
Derivative [Line Items]
Credit Risk Related Contingent Features Termination Value	12,800,000		12,800,000
Not Designated as Hedging Instrument [Member] | Interest Rate Caps
Derivative [Line Items]
Derivative, Number of Instruments Held	11		11
Notional Amount of Interest Rate Derivatives	63,820,000		63,820,000
Designated as Hedging Instrument [Member] | Interest Rate Caps
Derivative [Line Items]
Derivative, Number of Instruments Held	0		0
Notional Amount of Interest Rate Derivatives	205,180,000		205,180,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held	0		0
Notional Amount of Interest Rate Derivatives	$ 584,000,000		$ 584,000,000

XML

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013 Property States
Segment Reporting Information [Line Items]
Number of owned or owned interests of apartment communities	150
Number of states in which apartment units are located	12
Percentage of Total Public Multifamily REIT Units	1.00%
Period properties owned and stabilized	12 years
Large Market Same Store [Member]
Segment Reporting Information [Line Items]
Apartment communities in reportable operating segments	communities in markets with a population of at least one 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 [Member]
Segment Reporting Information [Line Items]
Apartment communities in reportable operating segments	communities in markets with populations of more than one million but less than one percent of the total public multifamily REIT units or in markets with a population of less than one 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 And Other [Member]
Segment Reporting Information [Line Items]
Apartment communities in reportable operating segments	recent acquisitions, communities in development or lease-up and communities that have been identified for disposition. Also included in non same store communities are non multifamily activities, which represent less than 1% of our portfolio.

XML

Earnings Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share Disclosure [Line Items]
Percentage of Consolidated Rental Revenue Generated by the Operating Partnership	90.40%	90.10%	90.30%	89.90%
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 32,496	$ 14,056	$ 33,189	$ 24,486
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	15,411	14,365	34,436	26,419
Weighted Average Number of Limited Partnership and General Partnership Unit Outstanding, Basic and Diluted	41,841	40,392	41,679	39,763
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest	(109)	(67)	(157)	136
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	51	68	(162)	(147)
Calculation of Earnings per Share - basic
Net income available for common shareholders	47,747	28,286	67,306	50,622
Income from continuing operations available for common unitholders	$ 0.37	$ 0.35	$ 0.82	$ 0.66
Earnings Per Share, Basic and Diluted	$ 1.14	$ 0.70	$ 1.61	$ 1.27
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic and Diluted Share	$ 0.77	$ 0.35	$ 0.79	$ 0.61
Calculation of Earnings per Share - diluted
Net income available for common shareholders	47,747	28,286	67,306	50,622
Net income attributable to noncontrolling interests	160	135	319	283
Adjusted Income (loss) from continuing operations available for common unitholders, basic and diluted	15,360	14,297	34,274	26,272
Adjusted Income (loss) from discontinued operations available for common unitholders, basic and diluted	$ 32,387	$ 13,989	$ 33,032	$ 24,350

XML

Summary of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental revenues	$ 111,320	$ 98,119	$ 219,373	$ 191,089
Other revenues	9,804	8,894	19,139	17,399
Total operating revenues	121,265	107,222	238,831	208,966
Property operating expenses	78,494	71,358	154,588	139,837
Interest expense	14,159	12,577	28,190	25,253
(Loss) income from discontinued operations before gain on sale	721	1,105	1,414	2,160
Net loss on insurance and other settlement proceeds on discontinued operations	(5)	(2)	(5)	(56)
Gain on sale of discontinued operations	31,780	12,953	31,780	22,382
Income from discontinued operations	32,496	14,056	33,189	24,486
Disposal Groups, Including Discontinued Operations, Name [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental revenues	1,984	5,341	4,317	11,143
Other revenues	129	514	296	1,085
Total operating revenues	2,113	5,855	4,613	12,228
Property operating expenses	948	2,879	2,059	6,164
Depreciation and amortization	371	1,541	986	3,199
Interest expense	73	330	154	705
Total expense	1,392	4,750	3,199	10,068
(Loss) income from discontinued operations before gain on sale			1,414	2,160
Net loss on insurance and other settlement proceeds on discontinued operations			(5)	(56)
Gain on sale of discontinued operations			31,780	22,382
Income from discontinued operations	$ 32,496	$ 14,056	$ 33,189	$ 24,486

XML

Fair Values of Derivative Instruments on Condensed Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 10,626	$ 245
Derivative financial instruments, Liability	11,907	21,423
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	62	43
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	0	0
Other assets
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	10,626	245
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	62	43
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments, Liability	11,907	21,423
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	$ 0	$ 0

XML

Assets for Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,620,720	$ 2,529,871
Large Market Same Store
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,187,218	1,108,827
Secondary Market Same Store
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	695,113	654,315
Non-Same Store and Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	678,361	728,209
Corporate assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 60,028	$ 38,520

XML

Fair Value Disclosure of Financial Instruments - Additional Information (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable	$ 1,671,442,000	$ 1,653,646,000
Fixed Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable Excluding Interest Rate Swaps and Cap Agreements	748,759,000	732,382,000
Notes Payable, fair value	783,800,000	777,847,000
Variable Rate Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable Excluding Interest Rate Swaps and Cap Agreements	922,683,000	921,265,000
Notes Payable, fair value	$ 856,688,000	$ 850,581,000

XML

Consolidation and Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Property States	Jun. 30, 2012	Jun. 30, 2013 Property States	Jun. 30, 2012	Dec. 31, 2012
Real Estate Properties [Line Items]
Number of units under development community	564		564
Number of owned or owned interests of apartment communities	150		150
Number of apartments included in a community	44,219		44,219
Capital improvements in progress	$ 47,020		$ 47,020		$ 50,844
Number of states in which apartment units are located	12		12
Operating partnership units outstanding	41,848,857	40,328,426	41,848,857	40,328,426
General Partners' Capital Account, Units Outstanding	40,141,197	38,544,218	40,141,197	38,544,218	39,721,461
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			95.90%	95.60%
Limited Partners' Capital Account, Units Outstanding	1,707,660	1,784,208	1,707,660	1,784,208	1,731,672
Percentage of Consolidated Rental Revenue Generated by the Operating Partnership	90.40%	90.10%	90.30%	89.90%
Development Properties [Member]
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities	2		2
Number of apartments included in a community	96		96
Mid America Multifamily Fund II, LLC
Real Estate Properties [Line Items]
Number Of Properties Acquired	4		4
Number Of Units Acquired In Real Estate Property			1,156
Under Development
Real Estate Properties [Line Items]
Number of owned or owned interests of apartment communities	4		4
Square Footage of Real Estate Property	107,000		107,000
Expected Costs [Member]
Real Estate Properties [Line Items]
Capital improvements in progress	73,800		73,800
Costs Incurred to Date [Member]
Real Estate Properties [Line Items]
Capital improvements in progress	$ 37,800		$ 37,800
Minimum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests	70.00%		70.00%
Maximum [Member]
Real Estate Properties [Line Items]
Percentage Of Ownership Interests	100.00%		100.00%

XML

Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Fair value adjustment on debt assumed	$ 704	$ 2,578
Cash flows from operating activities:
Consolidated net income	67,625	50,905
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Amortization and Accretion, Net		(38)
Retail Revenue Accretion	20
Depreciation and amortization	62,157	64,061
Stock compensation expense	1,050	1,104
Redeemable Units Issued	338	257
Amortization of debt premium	(504)	(316)
Loss from investments in real estate joint ventures	(102)	98
Gain on debt extinguishment	62	(5)
Derivative interest expense	465	361
Loss on sale of non-depreciable assets, including discontinued operations	0	(3)
Gain on sale of discontinued operations	(31,780)	(22,382)
Gain (Loss) on Disposal of Discontinued Operation		22,453
Net casualty loss and other settlement proceeds	(449)	65
Changes in assets and liabilities:
Restricted cash	(278)	102
Other assets	(3,281)	506
Accounts payable	5,575	2,699
Accrued expenses and other	(3,226)	9,947
Security deposits	298	299
Net cash provided by operating activities	97,930	107,671
Cash flows from investing activities:
Purchases of real estate and other assets	(89,123)	(96,941)
Improvements to existing real estate assets	(21,837)	(56,582)
Construction capital and other improvements	(1,861)	(636)
Renovations to Existing Real Estate Assets	4,282	2,364
Development	(20,816)	(18,617)
Distributions from real estate joint ventures	8,197	10,779
Contributions to real estate joint ventures	(183)	(69)
Proceeds from disposition of real estate assets	56,328	53,704
Funding of escrow for future acquisitions	(11,902)	0
Net cash used in investing activities	(85,479)	(110,726)
Cash flows from financing activities:
Advances from General Partner	22,170	3,004
Net change in credit lines	2,000	(232,064)
Proceeds from notes payable	0	150,000
Principal payments on notes payable	(2,697)	(1,757)
Payment of deferred financing costs	(426)	(2,115)
Payments for Repurchase of Common Units	673	17,177
Proceeds from Issuance of Common Limited Partners Units	24,969	120,149
Distributions Paid on Common Units	57,937	51,970
Net cash (used in) provided by financing activities	(12,594)	(31,930)
Net (decrease) increase in cash and cash equivalents	(143)	(34,985)
Cash and cash equivalents, beginning of period	8,886	57,151
Cash and cash equivalents, end of period	8,743	22,166
Supplemental disclosure of cash flow information:
Interest paid	30,937	27,341
Supplemental disclosure of noncash investing and financing activities:
Accrued construction in progress	5,395	5,389
Interest capitalized	872	969
Marked-to-market adjustment on derivative instruments	19,916	4,841
Notes Assumed	$ 18,293	$ 30,290

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Equity

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Equity

Total capital and its components for the six-month periods ended June 30, 2013 and 2012 were as follows (dollars in thousands, except per unit data):

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2012	$	30,993		$	706,296		$	(26,881	)	$	14,811	$	725,219
Net income	2,757			64,549						319		67,625
Other comprehensive income - derivative instruments (cash flow hedges)							20,381					20,381
Issuance of units				24,969								24,969
Units repurchased and retired				(673		)						(673		)
General partner units issued in exchange for limited partner units	(443		)	443								—
Redeemable units fair market value adjustment				(431		)						(431		)
Adjustment for noncontrolling interest ownership in subsidiaries	772			(778		)				6		—
Amortization of unearned compensation				1,171								1,171
Distributions ($1.3900 per unit)	(2,374		)	(55,801		)						(58,175		)
CAPITAL BALANCE JUNE 30, 2013	$	31,705		$	739,745		$	(6,500	)	$	15,136	$	780,086

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2011	$	28,729		$	538,623		$	(38,579	)	$	13,362		$	542,135
Net income	2,407			48,215						283			50,905
Other comprehensive income - derivative instruments (cash flow hedges)							5,202						5,202
Issuance of units				120,150									120,150
Units repurchased and retired				(17,177		)							(17,177		)
General partner units issued in exchange for limited partner units	(2,516		)	2,516									—
Redeemable units fair market value adjustment				(375		)							(375		)
Adjustment for noncontrolling interest ownership in subsidiaries	3,595			(3,590		)				(5		)	—
Amortization of unearned compensation				1,231									1,231
Distributions ($1.3200 per unit)	(2,458		)	(50,818		)							(53,276		)
CAPITAL BALANCE JUNE 30, 2012	$	29,757		$	638,775		$	(33,377	)	$	13,640		$	648,795

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Discontinued Operations

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Discontinued Operations

Discontinued Operations

The following properties have been classified as discontinued operations in the Condensed Consolidated Statements of Operations for the three- and six-month periods ended June 30, 2013 and 2012:

Community	Number of Units	Date Sold	Location	Operating Segment
Woodbridge	188	May 15, 2013	Jacksonville, Florida	Large market same store
High Ridge	160	June 13, 2013	Athens, Georgia	Secondary market same store
Paddock Club Jacksonville	440	June 20, 2013	Jacksonville, Florida	Large market same store
Marsh Oaks	120	Held for sale	Jacksonville, Florida	Large market same store
Fountain Lake	113	Held for sale	Brunswick, Georgia	Secondary market same store

The following is a summary of discontinued operations for the three- and six-month periods ended June 30, 2013 and 2012, (dollars in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Rental revenues	$	1,984		$	5,341		$	4,317		$	11,143
Other revenues	129			514			296			1,085
Total revenues	2,113			5,855			4,613			12,228
Expenses
Property operating expenses	948			2,879			2,059			6,164
Depreciation and amortization	371			1,541			986			3,199
Interest expense	73			330			154			705
Total expense	1,392			4,750			3,199			10,068
Income from discontinued operations before gain on sale	721			1,105			1,414			2,160
Net loss on insurance and other settlement proceeds on discontinued operations	(5		)	(2		)	(5		)	(56		)
Gain on sale of discontinued operations	31,780			12,953			31,780			22,382
Income from discontinued operations	$	32,496		$	14,056		$	33,189		$	24,486

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Segment Information

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Segment Information

Segment Information

As of June 30, 2013, MAALP owned or had an ownership interest in 150 multifamily apartment communities in 12 different states from which it 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 one million and at least 1% of the total public multifamily REIT units; and

◦ that MAALP has owned and have been stabilized for at least a full 12 months and have been identified as a disposition property by the Board of Directors.

• Secondary market same store communities are generally communities:

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

◦ that MAALP has owned and have been stabilized for at least a full 12 months and have been identified as a disposition property by the Board of Directors.

• Non same store communities and other includes recent acquisitions, communities in development or lease-up and communities that have been identified for disposition. 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, MAALP determines the composition of our same store operating segments for that year as well as adjusting the previous year, which allows MAALP 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 profits. A property becomes stabilized when it reaches 90% occupancy for at least 90 days.  MAALP utilizes net operating income, or NOI, in evaluating the performance of the segments.  Total NOI represents total property revenues less total property operating expenses, excluding depreciation and amortization, for all properties held during the period regardless of their status as held for sale. MAALP believes NOI is a helpful tool in evaluating the operating performance of its segments because it measures the core operations of property performance by excluding partnership level expenses and other items not related to property operating performance.

Revenues and NOI for each reportable segment for the three- and six-month periods ended June 30, 2013 and 2012 were as follows (dollars in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Large Market Same Store	$	58,142		$	55,111		$	115,421		$	109,043
Secondary Market Same Store	44,849			43,342			89,098			86,014
Non-Same Store and Other	18,133			8,560			33,993			13,431
Total property revenues	121,124			107,013			238,512			208,488
Management fee income	141			209			319			478
Total operating revenues	$	121,265		$	107,222		$	238,831		$	208,966
NOI
Large Market Same Store	$	34,424		$	32,217		$	69,004		$	63,653
Secondary Market Same Store	26,841			25,735			53,547			50,792
Non-Same Store and Other	12,302			8,110			23,397			13,890
Total NOI	73,567			66,062			145,948			128,335
Discontinued operations NOI included above	(1,165		)	(2,992		)	(2,518		)	(6,112		)
Management fee income	141			209			319			478
Depreciation and amortization	(29,772		)	(27,415		)	(59,506		)	(53,572		)
Acquisition expense	(489		)	(389		)	(499		)	(409		)
Property management expense	(4,282		)	(4,961		)	(9,060		)	(9,885		)
General and administrative expense	(2,410		)	(2,816		)	(5,300		)	(5,845		)
Merger related expenses	(5,737		)	—			(5,737		)	—
Interest and other non-property (loss) income	(5		)	84			13			198
Interest expense	(14,159		)	(12,577		)	(28,190		)	(25,253		)
(Loss) gain on debt extinguishment	(1		)	(15		)	(62		)	5
Amortization of deferred financing costs	(763		)	(753		)	(1,528		)	(1,409		)
Net casualty gain (loss) and other settlement proceeds	438			—			454			(9		)
Gain on sale of non-depreciable assets	—			(3		)	—			(3		)
Gain (loss) from real estate joint ventures	48			(69		)	102			(100		)
Discontinued operations	32,496			14,056			33,189			24,486
Net income attributable to noncontrolling interests	(160		)	(135		)	(319		)	(283		)
Net income available for Mid-America Apartments, L.P. common unitholders	$	47,747		$	28,286		$	67,306		$	50,622

Assets for each reportable segment as of June 30, 2013 and December 31, 2012, were as follows (dollars in thousands):

	June 30, 2013		December 31, 2012
Assets
Large Market Same Store	$	1,187,218	$	1,108,827
Secondary Market Same Store	695,113		654,315
Non-Same Store and Other	678,361		728,209
Corporate assets	60,028		38,520
Total assets	$	2,620,720	$	2,529,871

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Effect of Derivative Instruments on Consolidated Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 12,101	$ (3,991)	$ 11,904	$ (5,293)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax			11,904	(5,293)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	3,932	4,944	(8,477)	(10,495)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	23	(23)	26	(33)
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	12,101	(3,991)
Interest Rate Contract [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	3,932	4,944	(8,477)	(10,495)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	23	(23)	26	(33)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	10	(9)	(3)	(33)
Not Designated as Hedging Instrument [Member] | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net			$ (3)	$ (33)

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Total Equity and its Components (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Stockholders Equity Note [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	$ 31,705,000	$ 29,757,000	$ 31,705,000	$ 29,757,000	$ 30,993,000	$ 28,729,000
Net income	47,907,000	28,421,000	67,625,000	50,905,000
Income (Loss), Including Portion Attributable to Noncontrolling Interest			2,757,000	2,407,000
General Partnership Units Issued in Exchange for Limited Partnership Units			(443,000)	(2,516,000)
Adjustment for Noncontrolling Interest Ownership in operating partnership			(772,000)	(3,595,000)
Distributions			(2,374,000)	(2,458,000)
Total Partnership Capital [Domain]
Stockholders Equity Note [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	780,086,000	648,795,000	780,086,000	648,795,000	725,219,000	542,135,000
Net income			67,625,000	50,905,000
Other comprehensive income - derivative instruments (cash flow hedges)			20,381,000	5,202,000
Units Issued During Period, Value, New Issues			24,969,000	120,150,000
Units Repurchased and Retired During Period, Value			(673,000)	(17,177,000)
General Partnership Units Issued in Exchange for Limited Partnership Units			0	0
Redeemable stock fair market value			(431,000)	(375,000)
Adjustment for Noncontrolling Interest Ownership in operating partnership			0	0
Amortization of unearned compensation			1,171,000	1,231,000
Distributions			(58,175,000)	(53,276,000)
Noncontrolling Interest [Member]
Stockholders Equity Note [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	15,136,000	13,640,000	15,136,000	13,640,000	14,811,000	13,362,000
Net income			319,000	283,000
Adjustment for Noncontrolling Interest Ownership in operating partnership			6,000	5,000
General Partners' Capital Account, Class [Domain]
Stockholders Equity Note [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	739,745,000	638,775,000	739,745,000	638,775,000	706,296,000	538,623,000
Net income			64,549,000	48,215,000
Units Issued During Period, Value, New Issues			24,969,000	120,150,000
Units Repurchased and Retired During Period, Value			(673,000)	(17,177,000)
General Partnership Units Issued in Exchange for Limited Partnership Units			(443,000)	(2,516,000)
Redeemable stock fair market value			(431,000)	(375,000)
Adjustment for Noncontrolling Interest Ownership in operating partnership			(778,000)	(3,590,000)
Amortization of unearned compensation			1,171,000	1,231,000
Distributions			(55,801,000)	(50,818,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders Equity Note [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	(6,500,000)	(33,377,000)	(6,500,000)	(33,377,000)	(26,881,000)	(38,579,000)
Other comprehensive income - derivative instruments (cash flow hedges)			$ 20,381,000	$ 5,202,000

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Real Estate Acquisitions - Additional Information (Detail)	Jun. 30, 2013
Business Acquisition [Line Items]
Number of Units in Real Estate Property	44,219
Greenwood Forest [Member]
Business Acquisition [Line Items]
Number of Units in Real Estate Property	316
Station Square at Cosner's Corner [Member] [Member]
Business Acquisition [Line Items]
Number of Units in Real Estate Property	260

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Debt Structure (Detail) (USD $)	6 Months Ended			6 Months Ended			6 Months Ended			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Tax Free Credit Facility [Member]	Jun. 30, 2013 Unsecured Debt [Member]	Jun. 30, 2013 Secured Debt [Member]	Jun. 30, 2013 Unsecured Debt [Member]	Jun. 30, 2013 Fixed Rate Debt Unsecured Debt [Member]	Jun. 30, 2013 Fixed Rate Debt Term Fixed Loan With Swaps [Member] Unsecured Debt [Member]	Jun. 30, 2013 Fixed Rate Debt Secured Debt [Member]	Jun. 30, 2013 Variable Rate Debt Unsecured Debt [Member]	Aug. 02, 2013 Variable Rate Debt Unsecured Debt [Member]	Jun. 30, 2013 Variable Rate Debt Secured Debt [Member]
Debt Instrument [Line Items]
Unsecured notes payable	$ 585,000,000	$ 483,000,000
Total Outstanding Debt	$ 1,671,442,000	$ 1,653,646,000	$ 20,200,000		$ 1,086,442,000	$ 585,000,000		$ 150,000,000	$ 722,759,000	$ 125,000,000	$ 500,000,000	$ 363,683,000
Effective Rate	3.50%			3.30%			2.40%			1.40%
Contract Maturity	May 18, 2018			Mar. 20, 2019			Mar. 01, 2017			Nov. 01, 2015

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Subsequent Events - Additional Information (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Greenwood Forest [Member] Apartments	Jun. 30, 2013 Woodbridge At Lake [Member] Apartments	Aug. 02, 2013 Unsecured Debt [Member] Variable Rate Debt	Jun. 30, 2013 Unsecured Debt [Member] Variable Rate Debt	Aug. 02, 2013 Maximum [Member] Unsecured Debt [Member] Variable Rate Debt
Subsequent Event [Line Items]
Notes Payable	$ 1,671,442,000	$ 1,653,646,000			$ 500,000,000	$ 125,000,000	$ 800,000,000
Number of Units in Real Estate Property	44,219		316	188

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Condensed Consolidated Balance Sheets (Parenthetical)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
General Partners' Capital Account, Units Outstanding	40,141,197	39,721,461	38,544,218
Limited Partners' Capital Account, Units Outstanding	1,707,660	1,731,672	1,784,208
Temporary Equity, Shares Outstanding	78,154	72,786

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Derivatives and Hedging Activities

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Derivatives and Hedging Activities

Derivatives and Hedging Activities

Risk Management Objective of Using Derivatives

MAALP is exposed to certain risk arising from both its business operations and economic conditions. MAALP principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. MAALP manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources and duration of its 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 its borrowings, the value of which are determined by changing interest rates.

Cash Flow Hedges of Interest Rate Risk

MAALP's objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, MAALP uses 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 MAALP 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 six months ended June 30, 2013 and 2012, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt.  The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three months ended June 30, 2013 and 2012, MAALP recorded ineffectiveness of $23,000 (decrease to interest expense) and $23,000, (increase to interest expense), respectively, and during the six months ended June 30, 2013 and 2012, MAALP recorded ineffectiveness of $26,000 (decrease to interest expense) and $33,000 (increase to interest expense), respectively, mainly attributable to a mismatch in the underlying indices of the derivatives and the hedged interest payments made on its variable-rate debt.

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 debt. During the next 12 months, MAALP estimates that an additional $10.9 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 June 30, 2013, MAALP 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	10	$	205,180,000
Interest Rate Swaps (1)	19	$	584,000,000

⁽¹⁾ Includes 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 MD&A or footnote 7.

Non-Designated Hedges

Derivatives not designated as hedges are not speculative and are used to manage MAALP's exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of FASB ASC 815, Derivatives and Hedging. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings and resulted in a gain of $10,000 for the three months ended June 30, 2013 and a loss of $9,000 for the three months ended June 30, 2012. During the six months ended June 30, 2013 and 2012, we recognized a loss of $3,000 and $33,000, respectively, on derivatives not designated in hedging relationships.

As of June 30, 2013, MAALP had the following outstanding interest rate derivatives that were not designated as hedges:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	11	$	63,820,000

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

The table below presents the fair value of MAALP's derivative financial instruments as well as its classification on the Consolidated Balance Sheet as of June 30, 2013 and December 31, 2012, respectively.

Fair Values of Derivative Instruments on the Consolidated Balance Sheet as of June 30, 2013 and December 31, 2012 (dollars in thousands)

	Asset Derivatives					Liability Derivatives
		June 30, 2013		December 31, 2012			June 30, 2013		December 31, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	10,626	$	245	Fair market value of interest rate swaps	$	11,907	$	21,423
Total derivatives designated as hedging instruments		$	10,626	$	245		$	11,907	$	21,423
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	62	$	43		$	—	$	—
Total derivatives not designated as hedging instruments		$	62	$	43		$	—	$	—

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 Consolidated Statements of Operations for the three and six months ended June 30, 2013 and 2012, respectively.

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

Three and Six Months Ended June 30, 2013 and 2012 (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 June 30,	2013		2012				2013			2012				2013			2012
Interest rate contracts	$	12,101	$	(3,991	)	Interest expense	$	(3,932	)	$	(4,944	)	Interest expense	$	23		$	(23	)
Total derivatives in cash flow hedging relationships	$	12,101	$	(3,991	)		$	(3,932	)	$	(4,944	)		$	23		$	(23	)
Six months ended June 30,
Interest rate contracts	$	11,904	$	(5,293	)	Interest expense	$	(8,477	)	$	(10,495	)	Interest expense	$	26		$	(33	)
Total derivatives in cash flow hedging relationships	$	11,904	$	(5,293	)		$	(8,477	)	$	(10,495	)		$	26		$	(33	)
Derivatives Not Designated as Hedging Instruments
Three months ended June 30,													Location of Gain or (Loss) Recognized in Income	2013			2012
Interest rate contracts													Interest expense	$	10		$	(9	)
Total														$	10		$	(9	)
Six months ended June 30,
Interest rate contracts													Interest expense	$	(3	)	$	(33	)
Total														$	(3	)	$	(33	)

Credit-Risk-Related Contingent Features

As of June 30, 2013, derivatives that were in a net liability position and subject to credit-risk-related contingent features had a termination value of $12.8 million, which includes accrued interest but excludes any adjustment for nonperformance risk. These derivatives had a fair value, gross of asset positions, of $11.9 million at June 30, 2013.

Certain of our derivative contracts contain a provision where if we default on any of our indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then we could also be declared in default on our derivative obligations. As of June 30, 2013, 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 their termination value of $8.5 million.

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 the Company's default on the indebtedness. As of June 30, 2013, we had not breached the provisions of these agreements. If we had breached theses provisions, we could have been required to settle our obligations under the agreements at the termination value of $0.2 million.

Certain of our derivative contracts are credit enhanced by either FNMA or Freddie Mac.  These derivative contracts require that our credit enhancing party maintain credit ratings above a certain level.  If our credit support providers were downgraded below Baa1 by Moody’s or BBB+ by Standard & Poor’s, or S&P, we may be required to either post 100 percent collateral or settle the obligations at their termination value of $12.5 million as of June 30, 2013.  Both FNMA and Freddie Mac are currently rated Aaa by Moody’s and AA+ by S&P, and therefore, the provisions of this agreement have not been breached and no collateral has been posted related to these agreements as of June 30, 2013.

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 Consolidated Balance Sheet.

The table below presents a gross presentation, the effects of offsetting, and a net presentation of our derivatives as of June 30, 2013 and December 31, 2012. 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 Consolidated Balance Sheet (dollars in thousands):

Offsetting of Derivative Assets
As of June 30, 2013
						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	$	10,688	—	$	10,688	$	(422	)	—	$	10,266
Offsetting of Derivative Liabilities
As of June 30, 2013
						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	$	11,907	—	$	11,907	$	(422	)	—	$	11,485
Offsetting of Derivative Assets
As of December 31, 2012
						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	$	288	—	$	288	—			—	$	288
Offsetting of Derivative Liabilities
As of December 31, 2012
						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	$	21,423	—	$	21,423	—			—	$	21,423

Other Comprehensive Income

MAALP's other comprehensive income consists entirely of gains and losses attributable to the effective portion of our cash flow hedges. The table below shows the change in the balance for the six months ended June 30, 2013 and 2012:

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 six months ended June 30,
		2013			2012
Beginning balance		$	(26,881	)	$	(38,579	)
Other comprehensive income before reclassifications		11,904			(5,293		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	8,477			10,495
Net current-period other comprehensive income attributable to Mid-America Apartments, L.P.		20,381			5,202
Ending balance		$	(6,500	)	$	(33,377	)

See also discussions in "Financial Statements – Notes to Consolidated Financial Statements", Note 9.

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated net income	$ 47,907	$ 28,421	$ 67,625	$ 50,905
Unrealized losses from the effective portion of derivative instruments	12,101	(3,991)	11,904	(5,293)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax			11,904	(5,293)
Reclassification adjustment for losses included in net income for the effective portion of derivative instruments	3,932	4,944	(8,477)	(10,495)
Total comprehensive income	63,940	29,374	88,006	56,107
Less: comprehensive income attributable to noncontrolling interests	(160)	(135)	(319)	(283)
Comprehensive income attributable to MAA	$ 63,780	$ 29,239	$ 87,687	$ 55,824

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Condensed Consolidated Balance Sheets (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Temporary Equity, Shares Outstanding	78,154	72,786
Real estate assets:
Land	$ 370,589	$ 359,943
Buildings and improvements	2,942,211	2,867,409
Furniture, fixtures and equipment	87,429	84,997
Capital improvements in progress	47,020	50,844
Real Estate Investment Property, at Cost, Total	3,447,249	3,363,193
Less accumulated depreciation	(927,829)	(901,485)
Real Estate Investment Property, Net, Total	2,519,420	2,461,708
Land held for future development	5,450	1,205
Commercial properties, net	7,873	8,058
Investments in real estate joint ventures	3,178	4,837
Real estate assets, net	2,535,921	2,475,808
Cash and cash equivalents	8,743	8,886
Restricted cash	12,989	809
Deferred financing costs, net	12,041	13,380
Other assets	41,039	26,882
Goodwill	4,106	4,106
Assets held for sale	5,881	0
Total assets	2,620,720	2,529,871
Liabilities:
Secured notes payable	1,086,442	1,170,646
Unsecured notes payable	585,000	483,000
Accounts payable	9,436	3,889
Fair market value of interest rate swaps	11,907	21,423
Accrued expenses and other liabilities	89,462	90,559
Security deposits	6,453	6,167
Due to Related Parties, Current	46,265	24,255
Liabilities associated with assets held for sale	148	0
Total liabilities	1,835,113	1,799,939
Redeemable stock	5,521	4,713
Shareholders' equity:
General Partners' Capital Account	739,745	706,296
Limited Partners' Capital Account	31,705	30,993
Accumulated other comprehensive losses	(6,500)	(26,881)
Partners' Capital	764,950	710,408
Noncontrolling interest	15,136	14,811
Total equity	780,086	725,219
Total liabilities and equity	$ 2,620,720	$ 2,529,871

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Equity Total Comprehensive Income, Equity and their Components (Parenthetical) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stockholders Equity Note [Line Items]
Dividends on noncontrolling interest units	$ 0.6950	$ 0.6600	$ 1.3900	$ 1.3200

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Derivatives and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

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

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 six months ended June 30,
		2013			2012
Beginning balance		$	(26,881	)	$	(38,579	)
Other comprehensive income before reclassifications		11,904			(5,293		)
Amounts reclassified from accumulated other comprehensive income (interest rate contracts)	Interest expense	8,477			10,495
Net current-period other comprehensive income attributable to Mid-America Apartments, L.P.		20,381			5,202
Ending balance		$	(6,500	)	$	(33,377	)

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

As of June 30, 2013, MAALP 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	10	$	205,180,000
Interest Rate Swaps (1)	19	$	584,000,000

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

As of June 30, 2013, MAALP had the following outstanding interest rate derivatives that were not designated as hedges:

Interest Rate Derivative	Number of Instruments	Notional
Interest Rate Caps	11	$	63,820,000

Fair Values of Derivative Instruments on Condensed Consolidated Balance Sheet

	Asset Derivatives					Liability Derivatives
		June 30, 2013		December 31, 2012			June 30, 2013		December 31, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate contracts	Other assets	$	10,626	$	245	Fair market value of interest rate swaps	$	11,907	$	21,423
Total derivatives designated as hedging instruments		$	10,626	$	245		$	11,907	$	21,423
Derivatives not designated as hedging instruments
Interest rate contracts	Other assets	$	62	$	43		$	—	$	—
Total derivatives not designated as hedging instruments		$	62	$	43		$	—	$	—

Offsetting of Derivative Assets
As of June 30, 2013
						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	$	10,688	—	$	10,688	$	(422	)	—	$	10,266
Offsetting of Derivative Liabilities
As of June 30, 2013
						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	$	11,907	—	$	11,907	$	(422	)	—	$	11,485
Offsetting of Derivative Assets
As of December 31, 2012
						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	$	288	—	$	288	—			—	$	288
Offsetting of Derivative Liabilities
As of December 31, 2012
						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	$	21,423	—	$	21,423	—			—	$	21,423

Effect of Derivative Instruments on Consolidated Statement of Operations

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 June 30,	2013		2012				2013			2012				2013			2012
Interest rate contracts	$	12,101	$	(3,991	)	Interest expense	$	(3,932	)	$	(4,944	)	Interest expense	$	23		$	(23	)
Total derivatives in cash flow hedging relationships	$	12,101	$	(3,991	)		$	(3,932	)	$	(4,944	)		$	23		$	(23	)
Six months ended June 30,
Interest rate contracts	$	11,904	$	(5,293	)	Interest expense	$	(8,477	)	$	(10,495	)	Interest expense	$	26		$	(33	)
Total derivatives in cash flow hedging relationships	$	11,904	$	(5,293	)		$	(8,477	)	$	(10,495	)		$	26		$	(33	)
Derivatives Not Designated as Hedging Instruments
Three months ended June 30,													Location of Gain or (Loss) Recognized in Income	2013			2012
Interest rate contracts													Interest expense	$	10		$	(9	)
Total														$	10		$	(9	)
Six months ended June 30,
Interest rate contracts													Interest expense	$	(3	)	$	(33	)
Total														$	(3	)	$	(33	)

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Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Assets, at Fair Value	$ 10,688,000	$ 288,000
Derivative financial instruments, Liability	11,907,000	21,423,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Assets, at Fair Value	0	0
Derivative financial instruments, Liability	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Assets, at Fair Value	10,688,000	288,000
Derivative financial instruments, Liability	11,907,000	21,423,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Derivative Assets, at Fair Value	0	0
Derivative financial instruments, Liability	$ 0	$ 0

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Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk (Detail) (Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013 Contract
Interest Rate Caps
Derivative [Line Items]
Derivative, Number of Instruments Held	0
Notional	$ 205,180
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held	0
Notional	584,000
Interest Rate Forward Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held	3
Notional	$ 150,000

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Share and Unit Information - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 02, 2012	Jun. 30, 2013 At The Market ATM Programs [Member]	Jun. 30, 2013 At The Market ATM Programs [Member]	Mar. 31, 2013 At The Market ATM Programs [Member]	Aug. 26, 2010 At The Market ATM Programs [Member]	Jun. 30, 2013 At Market A T M Programs [Member]	Jun. 30, 2013 At Market A T M Programs [Member]	Jun. 30, 2013 Noncontrolling Interest [Member]	Jun. 30, 2012 Noncontrolling Interest [Member]	Jun. 30, 2013 Maximum [Member] Dividend And Distribution Reinvestment And Share Purchase Plan [Member]	Jun. 30, 2013 Minimum [Member] Dividend And Distribution Reinvestment And Share Purchase Plan [Member]
Stockholders Equity Note [Line Items]
Limited Partners' Capital Account	$ 31,705,000		$ 31,705,000		$ 30,993,000								$ 115,728,118	$ 121,754,354
Operating partnership units outstanding	41,848,857	40,328,426	41,848,857	40,328,426
General Partners' Capital Account, Units Outstanding	40,141,197	38,544,218	40,141,197	38,544,218	39,721,461
Redeemable Capital Shares Par Or Stated Value Per Share													$ 67.77	$ 68.24
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			95.90%	95.60%
Limited Partners' Capital Account, Units Outstanding	1,707,660	1,784,208	1,707,660	1,784,208	1,731,672
Agreement to sell common stock with financial service companies, shares									4,500,000	6,000,000
Common stock, shares issued								4,134,989			39,845	365,011
proceeds from issuance of common stock, net of applicable fees			120,100,000				2,700,000	24,800,000
Proceeds from Issuance of common stock	2,800,000		25,100,000	124,100,000
Optional Cash Investments In Common Stock															5,000	250
Common Stock, Shares Authorized															7,600,000
Common Stock Discount Rate															5.00%
Shares Sold On Underwritten Public Offering						1,955,000
Common stock issued, Dividend and Distribution Reinvestment and Share Purchase Program	188	209	329	329
Proceeds from Issuance of common stock, Dividend and Distribution Reinvestment and Share Purchase Program	$ 13,000	$ 0	$ 22,000	$ 0
Common stock acquired to satisfy tax withholding obligation that arose upon vesting of restricted stock granted			4,582	15,565

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Notes Payable - Additional Information (Detail) (USD $)	6 Months Ended		6 Months Ended				6 Months Ended			6 Months Ended					6 Months Ended						6 Months Ended						6 Months Ended							6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Secured Debt [Member]	Jun. 30, 2013 Secured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Tax Free Credit Facility [Member]	Jun. 30, 2013 Unsecured Debt [Member]	Jun. 14, 2013 Unsecured Debt [Member] $250 million unsecured term loan [Member]	Mar. 01, 2012 Unsecured Debt [Member] $150 million unsecured term loan [Domain]	Jun. 30, 2013 Unsecured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Unsecured Debt [Member] Floating Rate Debt [Member]	Aug. 02, 2013 Unsecured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Unsecured Debt [Member] Senior Notes [Member]	Jun. 30, 2013 Term Fixed Loan With Swaps [Member] Unsecured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Senior Notes [Member] Unsecured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Individual Property Mortgages [Member] Secured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Secured Debt [Member]	Jun. 30, 2013 Secured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Unsecured Debt [Member]	Jun. 30, 2013 L I B O R [Member] Secured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Mortgages [Member] Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Minimum [Member] $150 million unsecured term loan [Domain]	Mar. 01, 2012 Minimum [Member] $150 million unsecured term loan [Domain]	Jun. 30, 2013 Maximum $150 million unsecured term loan [Domain]	Mar. 01, 2012 Maximum $150 million unsecured term loan [Domain]	Jun. 30, 2013 Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Conventional Credit Facility [Member] Secured Debt [Member] Fixed Rate Debt	Jun. 30, 2013 Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Conventional Credit Facility [Member] Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Tax Free Credit Facility [Member] Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Tranche 1 [Member] Unsecured Debt [Member] Senior Notes [Member]	Jun. 30, 2013 Tranche 2 [Member] Unsecured Debt [Member] Senior Notes [Member]	Jun. 30, 2013 Tranche 3 [Member] Unsecured Debt [Member] Senior Notes [Member]	Jun. 30, 2013 Tranche 4 [Member] Unsecured Debt [Member] Senior Notes [Member]	Jun. 30, 2013 Freddie Mac [Member] Conventional Credit Facility [Member] Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Freddie Mac [Member] Mortgages [Member] Secured Debt [Member] Floating Rate Debt [Member]	Jun. 30, 2013 Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Contract	Jun. 30, 2013 Designated as Hedging Instrument [Member] Interest Rate Caps Contract	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Interest Rate Caps Contract
Debt Instrument [Line Items]
Notes Payable	$ 1,671,442,000	$ 1,653,646,000				$ 20,200,000					$ 125,000,000	$ 500,000,000		$ 150,000,000	$ 310,000,000	$ 388,759,000	$ 1,086,442,000	$ 722,759,000	$ 363,683,000	$ 585,000,000	$ 284,000,000	$ 15,200,000					$ 50,000,000	$ 214,721,000	$ 69,515,000					$ 64,247,000
Debt Instrument, Face Amount								250,000,000	150,000,000				175,000,000																	18,000,000	20,000,000	117,000,000	20,000,000
Debt Instrument, Interest Rate, Stated Percentage																														3.15%	3.61%	4.17%	4.33%
Debt Instrument, Basis Spread on Variable Rate																							1.10%	1.40%	2.05%	2.15%
Secured credit facility as a Percentage of outstanding debt	41.00%
Notional																																				$ 584,000,000	$ 205,180,000	$ 63,820,000
Derivative, Number of Instruments Held																																				0	0	11
Debt Instrument, Interest Rate, Effective Percentage	3.50%		3.60%	4.90%	0.90%		3.30%			2.40%	1.40%				4.50%	4.70%					5.30%	3.50%					4.70%	0.70%	0.90%					0.70%
Debt Instrument, Maturity Date	May 18, 2018		Dec. 04, 2017	Apr. 28, 2017	Feb. 14, 2019		Mar. 20, 2019			Mar. 01, 2017	Nov. 01, 2015				Jul. 27, 2021	Jun. 02, 2019					Jun. 22, 2014						Mar. 31, 2017	Sep. 06, 2016	Aug. 11, 2031					Jul. 01, 2014	Jan. 01, 2016

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Notes Payable

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Notes Payable

Notes Payable

On June 30, 2013 and December 31, 2012, MAALP had total indebtedness of approximately $1.67 billion and $1.65 billion, respectively. MAALP's indebtedness as of June 30, 2013 consisted of both conventional and tax exempt debt. Borrowings were made through individual property mortgages as well as company-wide credit facilities. MAALP utilizes both secured and unsecured debt.

On March 1, 2012, MAALP entered into a $150 million unsecured term loan agreement with a syndicate of banks led by KeyBank and J.P. Morgan with a variable rate resetting monthly at LIBOR plus a spread of 1.40% to 2.15% based on a leveraged-based pricing grid and a maturity date of March 1, 2017. As of June 30, 2013, the full amount was outstanding under this agreement. In July 2012, MAALP received an investment grade rating (Baa2) from Moody's rating service, which caused the variable rate to reset monthly at LIBOR plus a spread of 1.10% to 2.05% based on an investment grade ratings grid.

On August 31, 2012, MAALP issued $175 million of Senior Unsecured Notes to be funded at three separate times. These notes were offered in a private placement with four tranches: $18 million at 3.15% maturing on November 30, 2017; $20 million at 3.61% maturing on November 30, 2019; $117 million at 4.17% maturing on November 30, 2022; and $20 million at 4.33% maturing on November 30, 2024. As of June 30, 2013, the full amount of the notes has been funded and is included in our balance sheet.

On June 14, 2013, we entered into a $250 million term loan agreement with JPMorgan at a rate of LIBOR plus a spread of 1.30% on any outstanding borrowings. This agreement matures on June 14, 2014 although borrowings are only allowed to be drawn upon up until 60 days subsequent to the closing of the merger with Colonial. We had no borrowings under this agreement at June 30, 2013.

As of June 30, 2013, approximately 41% of MAALP's outstanding debt was borrowed through secured credit facility relationships with Prudential Mortgage Capital, which are credit enhanced by the Federal National Mortgage Association, or FNMA, and Financial Federal, which are credit enhanced by the Federal Home Loan Mortgage Corporation, or Freddie Mac.

MAALP utilizes interest rate swaps and interest rate caps to help manage its current and future interest rate risk and entered into 19 interest rate swaps and 10 interest rate caps as of June 30, 2013, representing notional amounts totaling $584.0 million and $205.2 million, respectively. MAALP also held 11 non-designated interest rate caps with notional amounts totaling $63.8 million as of June 30, 2013.

The following table summarizes our outstanding debt structure as of June 30, 2013 (dollars in thousands):

	Borrowed Balance		Effective Rate		Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	388,759	4.7	%	6/2/2019
FNMA conventional credit facilities	50,000		4.7	%	3/31/2017
Credit facility balances with:
LIBOR-based interest rate swaps	284,000		5.3	%	6/22/2014
Total fixed rate secured debt	$	722,759	4.9	%	4/28/2017
Variable Rate Secured Debt (1)
FNMA conventional credit facilities	$	214,721	0.7	%	9/6/2016
FNMA tax-free credit facilities	69,515		0.9	%	8/11/2031
Freddie Mac credit facilities	64,247		0.7	%	7/1/2014
Freddie Mac mortgage	15,200		3.5	%	1/1/2016
Total variable rate secured debt	$	363,683	0.9	%	2/14/2019
Total Secured Debt	$	1,086,442	3.6	%	12/4/2017
Unsecured Debt
Variable rate credit facility	$	125,000	1.4	%	11/1/2015
Term loan fixed with swaps	150,000		2.4	%	3/1/2017
Fixed rate senior private placement bonds	310,000		4.5	%	7/27/2021
Total Unsecured Debt	$	585,000	3.3	%	3/20/2019
Total Outstanding Debt	$	1,671,442	3.5	%	5/18/2018

⁽¹⁾ Includes capped balances.

MAALP has additional requirements related to $20.2 million of tax-free bonds issued by MAA but held within the FNMA facility. These amounts are not included in our debt discussion above or within our Consolidated Balance Sheets as MAALP is not the legal borrower of the bonds; however, because of MAALP's obligations under the FNMA facility, we could be required to pay related principal, interest, and other costs if MAA were to default on its payments.

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Revenues and NOI for Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Total property revenues	$ 121,124	$ 107,013	$ 238,512	$ 208,488
Management fee income	141	209	319	478
Total operating revenues	121,265	107,222	238,831	208,966
Net Operating Income	73,567	66,062	145,948	128,335
Discontinued operations NOI included above	(1,165)	(2,992)	(2,518)	(6,112)
Depreciation and amortization	(29,772)	(27,415)	(59,506)	(53,572)
Acquisition credit (expense)	(489)	(389)	(499)	(409)
Property management expense	(4,282)	(4,961)	(9,060)	(9,885)
General and administrative expense	(2,410)	(2,816)	(5,300)	(5,845)
Merger Related Expenses	(5,737)	0	(5,737)	0
Interest and other non-property income	(5)	84	13	198
Interest expense	(14,159)	(12,577)	(28,190)	(25,253)
Net casualty loss and other settlement proceeds	438	0	454	(9)
Gain on debt extinguishment	(1)	(15)	(62)	5
Amortization of deferred financing costs	(763)	(753)	(1,528)	(1,409)
Income (Loss) from Equity Method Investments	48	(69)	102	(100)
Discontinued operations	(32,496)	(14,056)	(33,189)	(24,486)
Net income attributable to noncontrolling interests	(160)	(135)	(319)	(283)
Net income attributable to MAA	47,747	28,286	67,306	50,622
Loss on sale of non-depreciable assets	0	(3)	0	(3)
Large Market Same Store
Revenues
Total property revenues	58,142	55,111
Real Estate Revenue, Net, Adjusted			115,421	109,043
Net Operating Income	34,424	32,217	69,004	63,653
Secondary Market Same Store
Revenues
Total property revenues	44,849	43,342
Real Estate Revenue, Net, Adjusted			89,098	86,014
Net Operating Income	26,841	25,735	53,547	50,792
Non-Same Store and Other
Revenues
Total property revenues	18,133	8,560
Real Estate Revenue, Net, Adjusted			33,993	13,431
Net Operating Income	$ 12,302	$ 8,110	$ 23,397	$ 13,890

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Derivatives and Hedging Activities Gross presentation effects of offsetting and net presentation of derivatives (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 10,688	$ 288
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative Asset, Fair Value, Net	10,688	288
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net	(422)	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability, Fair Value, Gross Liability	11,907	21,423
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Net	11,907	21,423
Liability [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	11,485	21,423
Assets [Member]
Derivative [Line Items]
Derivative, Fair Value, Net	$ 10,266	$ 288

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Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Recent Accounting Pronouncements

 Recent Accounting Pronouncements

Impact of Recently Issued Accounting Standards

In February 2013, the FASB issued Accounting Standards Update, or ASU, No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of Accumulated other comprehensive income, or AOCI, by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. ASU 2013-02 is effective for interim and annual periods beginning after December 15, 2012 and early adoption is permitted. We early adopted ASU 2013-02 for the annual period ended December 31, 2012. The adoption of ASU 2013-02 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In January 2013, the FASB issued ASU No. 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. ASU 2013-01 clarifies that the scope of ASU 2011-11, Disclosures about Offsetting Assets and Liabilities, would apply to derivatives accounted for in accordance with FASB ASC 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with ASC 210-20-45 or ASC 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. This ASU is effective for fiscal years beginning on or after January 1, 2013 and interim periods within those annual periods. We adopted ASU 2013-01 during the period ended March 31, 2013. The adoption of ASU 2013-01 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

In May 2011, the FASB issued ASU No. 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments change the wording, mainly for clarification, used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the Board does not intend for the amendments in this update to result in a change in the application of the requirements in ASU 2011-04. The amendments in this ASU are to be applied prospectively. The amendments are effective during interim and annual periods beginning after December 15, 2011. We adopted ASU 2011-04 for the interim and annual periods of fiscal year 2012. The adoption of ASU 2011-04 has not had a material impact on our consolidated financial condition or results of operations taken as a whole.

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Share and Unit Information

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Share and Unit Information

Interests in MAALP are represented by OP Units. As of June 30, 2013, there were 41,848,857 OP Units outstanding, 40,141,197, or 95.9%, of which were owned by MAA, our general partner. The remaining 1,707,660 OP Units were owned by nonaffiliated limited partners, or the Class A Limited Partners. As of June 30, 2012, there were 40,328,426 OP Units outstanding, 38,544,218 or 95.6% of which were owned by MAA and 1,784,208 of which were owned by the Class A Limited Partners.

MAA, as the sole general partner, has full, complete and exclusive discretion to manage and control the business of MAALP subject to the restrictions specifically contained within 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 MAALP's assets; and distribution of MAALP 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. The general partner may delegate these and other powers granted if the general partner remains in supervision of the designee.

Under the Partnership Agreement, MAALP may issue Class A OP Units and Class B OP Units. Class A OP Units may only be held by limited partners who are not affiliated with MAA, as defined in the Partnership Agreement, in its capacity as general partner of the Operating Partnership, while Class B OP Units may only be held by MAA, in its capacity as general partner of the Operating Partnership, and as of June 30, 2013, a total of 1,707,660 Class A OP Units in the Operating Partnership were held by limited partners unaffiliated with MAA, while a total of 40,141,197 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 MAALP'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 Operating Partnership. 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 of Class B OP Units to MAA equal to the number of common stock shares 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 Unit 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 June 30, 2013, a total of 1,707,660 Class A OP Units were outstanding and redeemable for 1,707,660 shares of MAA common stock, or approximately $115,728,118 based on the closing price of MAA’s common stock on June 30, 2013 of $67.77 per share, at MAA’s option. At June 30, 2012, a total of 1,784,208 Class A OP Units were outstanding and redeemable for 1,784,208 shares of MAA common stock, or approximately $121,754,354 based on the closing price of MAA’s common stock on June 30, 2012 of $68.24 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.

On August 26, 2010, MAALP and MAA entered into sales agreements with Cantor Fitzgerald & Co., Raymond James & Associates, Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated to sell up to a combined total of 6,000,000 shares of MAA common stock, from time to time in at-the-market offerings or negotiated transactions through a controlled equity offering program. We terminated this ATM program and on February 25, 2013, MAALP and MAA entered into sales agreements with J.P. Morgan Securities LLC, BMO Capital Markets Corp., KeyBanc Capital Markets Inc. and UBS Securities LLC with materially the same terms as our previous distribution agreements for a combined total of 4,500,000 shares of MAA common stock.

During the three- and six-month periods ended June 30, 2013, MAA sold 39,845 shares and 365,011 shares of common stock, respectively, for net proceeds of $2.7 million and $24.8 million, respectively, through its ATM programs. The gross proceeds for these issuances were $2.8 million and $25.1 million, respectively, for the three- and six-month periods ended June 30, 2013. During the three- and six-month periods ended June 30, 2012, MAA did not issue any shares through its ATM programs. As of June 30, 2013, there were 4,134,989 shares outstanding under the ATM. All proceeds from these transactions were received by MAALP in exchange for a number of OP Units equal to the number of shares issued by MAA.

On March 2, 2012, MAA closed on an underwritten public offering of 1,955,000 shares of common stock. UBS Investment Bank and Jeffries & Company, Inc. acted as joint bookrunning managers. This transaction resulted in net proceeds of $120.1 million. The gross proceeds for this offering were approximately $124.1 million. MAA had no such offerings during the three- and six-month periods ended June 30, 2013. Proceeds from this transaction were received by MAALP in exchange for OP Units equal to the number of shares issued.

We have a Dividend and Distribution Reinvestment and Share Purchase Plan, or DRSPP, pursuant to which MAA’s shareholders and our holders of OP Units have the ability to reinvest all or part of their distributions from MAA’s common stock, preferred stock or OP Units into MAA’s common stock. The plan also provides the opportunity to make optional cash investments in common shares of at least $250, but not more than $5,000 in any given month, free of brokerage commissions and charges. MAA, in its absolute discretion, may grant waivers to allow for optional cash payments in excess of $5,000. To fulfill its obligations under the DRSPP, MAA may either issue additional shares of common stock or repurchase common stock in the open market. MAA has registered with the Securities and Exchange Commission the offer and sale of up to 7,600,000 shares of common stock pursuant to the DRSPP. MAA may elect to sell shares under the DRSPP at up to a 5% discount.

Common stock shares totaling 188 and 329 during the three- and six-month periods ended June 30, 2013 and 209 and 329 during the three- and six-month periods ended June 30, 2012 were acquired by shareholders under the DRSPP. The issuances resulted in gross proceeds of approximately $13,000 and $22,000 for the three- and six-month periods ending June 30, 2013 and $14,000 and $22,000 for the three- and six-month periods ending June 30, 2012. All funds received from these issuances were contributed to the Operating Partnership in exchange for a number of OP Units equal to the number of shares issued by MAA.

During the six months ended June 30, 2013, 4,582 shares of MAA’s common stock were acquired from employees to satisfy minimum tax withholding obligations that arose upon vesting of restricted stock granted pursuant to approved plans. During the six months ended June 30, 2012, 15,565 shares were acquired for these purposes. MAALP acquires OP units from MAA equal to the number of shares acquired by MAA from employees to satisfy tax withholding obligations.

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Consolidation and Basis of Presentation and Significant Accounting Policies Consolidation and Basis of Presentation and Significant Accounting Policies (Notes)

6 Months Ended

Jun. 30, 2013

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

Consolidation and Basis of Presentation and Significant Accounting Policies

Consolidation and Basis of Presentation and Significant Accounting Policies

Consolidation and Basis of Presentation

Mid-America Apartments, L.P., or "MAALP", "us", "we", "our", or the "Operating Partnership", is a Memphis, Tennessee based limited partnership formed in 1993 and currently operates pursuant to the provisions of the Second Amended and Restated Agreement of Limited Partnership, or the Partnership Agreement. MAALP's sole general partner is Mid-America Apartment Communities, Inc., or MAA, a Memphis, Tennessee-based self-administered and self-managed real estate investment trust, or REIT, that focuses on acquiring, owning and operating apartment communities mainly in the Sunbelt region of the United States. As of June 30, 2013, MAALP owned or owned interests in a total of 150 multifamily apartment communities comprising 44,219 apartments located in 12 states, including four communities comprising 1,156 apartments owned through our joint venture, Mid-America Multifamily Fund II, LLC, or Fund II. MAALP also had two development communities under construction totaling 564 units as of June 30, 2013. A total of 96 units for the development projects were completed as of June 30, 2013, and therefore have been included in the totals above. Total expected costs for the development projects are $73.8 million, of which $37.8 million has been incurred through June 30, 2013. MAALP expects to complete construction on one of the projects by the fourth quarter of 2013 and the other by the fourth quarter of 2014. Four of our properties include retail components with approximately 107,000 square feet of gross leasable area.

On June 3, 2013, MAA entered into an agreement and plan of merger with Colonial Properties Trust, or Colonial, a Birmingham, Alabama-based REIT operating primarily in the multifamily apartment sector, in which MAA will merge with Colonial in a stock-for-stock transaction. As part of the merger, MAALP will also merge with Colonial Realty Limited Partnership, or Colonial LP. The mergers are expected to be completed during the third quarter of 2013. The combined company will operate under the name "MAA" and will be run by our existing management team.

The accompanying unaudited condensed consolidated financial statements have been prepared by our management in accordance with United States generally accepted accounting principles, or GAAP, for interim financial information and applicable rules and regulations of the Securities and Exchange Commission, or the SEC, and our accounting policies as set forth in our December 31, 2012 annual consolidated financial statements. All significant intercompany accounts and transactions have been eliminated in consolidation. 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. The results of operations for the three- and six-month periods ended June 30, 2013 and 2012 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with our audited financial statements and notes thereto included in our Current Report on Form 8-K filed with the SEC on March 22, 2013. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the dates of the financial statements and the amounts of revenues and expenses during the reporting periods.  Actual amounts realized or paid could differ from those estimates.

Interests in MAALP are represented by operating partnership units, or OP Units. As of June 30, 2013, there were 41,848,857 OP Units outstanding, 40,141,197, or 95.9%, of which were owned by MAA, our general partner. The remaining 1,707,660 OP Units were owned by nonaffiliated limited partners, as defined in the Partnership Agreement. During the three-month periods ended June 30, 2013 and 2012, rental revenue of the Operating Partnership represented 90.4% and 90.1% of the consolidated rental revenues of MAA, respectively. During the six-month periods ended June 30, 2013 and 2012, rental revenue of the Operating Partnership represented 90.3% and 89.9% of the consolidated rental revenues of MAA, respectively.

The consolidated financial statements presented herein include the accounts of MAALP and all other subsidiaries in which MAALP has a controlling financial interest. MAALP owns approximately 70% to 100% of all consolidated subsidiaries.

MAALP invests in entities that 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. MAALP consolidates all VIEs for which it is the primary beneficiary and uses the equity method to account for investments that qualify as VIEs but for which it is not the primary beneficiary. In determining whether MAALP is the primary beneficiary of a VIE, MAALP considers 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.

MAALP uses the equity method of accounting for its investments in entities for which it exercises significant influence, but does not have the ability to exercise control. These entities are not variable interest entities. The factors considered in determining that MAALP does not have the ability to exercise control include ownership of voting interests and participatory rights of investors.

Earnings per OP Unit

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. 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. For the three and six months ended June 30, 2013 and 2012, there were no dilutive securities and therefore basic and diluted earnings per OP Unit are the same.

A reconciliation of the numerators and denominators of the basic and diluted earnings per unit computations for the three and six months ended June 30, 2013 and 2012 is presented below:

(dollars and units in thousands, except per unit amounts)	Three months ended June 30,				Six months ended June 30,
	2013		2012		2013		2012
Units Outstanding
Weighted average common units - basic and diluted	41,841		40,392		41,679		39,763
Calculation of Earnings per Unit - basic and diluted
Income from continuing operations	$	15,411	$	14,365	$	34,436	$	26,419
Income from continuing operations attributable to noncontrolling interests	51		68		162		147
Income from continuing operations available for common unitholders, adjusted	$	15,360	$	14,297	$	34,274	$	26,272
Income from discontinued operations	$	32,496	$	14,056	$	33,189	$	24,486
Income from discontinued operations attributable to noncontrolling interests	109		67		157		136
Income from discontinued operations available for common unitholders, adjusted	$	32,387	$	13,989	$	33,032	$	24,350
Earnings per unit - basic and diluted:
Income from continuing operations available for common unitholders	$	0.37	$	0.35	$	0.82	$	0.66
Income from discontinued operations available for common unitholders	0.77		0.35		0.79		0.61
Net income available for common unitholders	$	1.14	$	0.70	$	1.61	$	1.27

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Discontinued Operations - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	44,219		44,219
Gain on sale of discontinued operations	$ 31,780	$ 12,953	$ 31,780	$ 22,382
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	51	68	(162)	(147)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest	109	67	157	(136)
Woodbridge At Lake [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	188		188
High Ridge [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	160		160
Paddock Club Jacksonville [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	440		440
Marsh Oaks [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	120		120
Fountain Lake [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Units in Real Estate Property	113		113
Disposal Groups, Including Discontinued Operations, Name [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation	371	1,541	986	3,199
Gain on sale of discontinued operations			$ 31,780	$ 22,382

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Equity (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Total Equity and its Components

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest		Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2012	$	30,993		$	706,296		$	(26,881	)	$	14,811	$	725,219
Net income	2,757			64,549						319		67,625
Other comprehensive income - derivative instruments (cash flow hedges)							20,381					20,381
Issuance of units				24,969								24,969
Units repurchased and retired				(673		)						(673		)
General partner units issued in exchange for limited partner units	(443		)	443								—
Redeemable units fair market value adjustment				(431		)						(431		)
Adjustment for noncontrolling interest ownership in subsidiaries	772			(778		)				6		—
Amortization of unearned compensation				1,171								1,171
Distributions ($1.3900 per unit)	(2,374		)	(55,801		)						(58,175		)
CAPITAL BALANCE JUNE 30, 2013	$	31,705		$	739,745		$	(6,500	)	$	15,136	$	780,086

	MAALP Unitholders
	Limited Partner			General Partner			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interest			Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2011	$	28,729		$	538,623		$	(38,579	)	$	13,362		$	542,135
Net income	2,407			48,215						283			50,905
Other comprehensive income - derivative instruments (cash flow hedges)							5,202						5,202
Issuance of units				120,150									120,150
Units repurchased and retired				(17,177		)							(17,177		)
General partner units issued in exchange for limited partner units	(2,516		)	2,516									—
Redeemable units fair market value adjustment				(375		)							(375		)
Adjustment for noncontrolling interest ownership in subsidiaries	3,595			(3,590		)				(5		)	—
Amortization of unearned compensation				1,231									1,231
Distributions ($1.3200 per unit)	(2,458		)	(50,818		)							(53,276		)
CAPITAL BALANCE JUNE 30, 2012	$	29,757		$	638,775		$	(33,377	)	$	13,640		$	648,795

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Fair Value Disclosure of Financial Instruments

6 Months Ended

Jun. 30, 2013

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.

On January 1, 2008, MAALP adopted FASB 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 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. 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).

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. MAALP's 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 June 30, 2013 and December 31, 2012, totaled $749 million and $732 million, respectively, and had estimated fair values of $784 million and $778 million (excluding prepayment penalties), respectively, as of June 30, 2013 and December 31, 2012. The carrying value of variable rate notes payable (excluding the effect of interest rate swap and cap agreements) at June 30, 2013 and December 31, 2012, totaled $923 million and $921 million, respectively, and had estimated fair values of $857 million and $851 million (excluding prepayment penalties), respectively, as of June 30, 2013 and December 31, 2012.

Currently, MAALP uses interest rate swaps and interest rate caps (options) to manage its interest rate risk. 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 (caps) 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, MAALP incorporates 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, MAALP has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts and guarantees.

MAALP has 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 June 30, 2013 and December 31, 2012 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 June 30, 2013 and December 31, 2012, 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 June 30, 2013

(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
							June 30, 2013
Assets
Derivative financial instruments	$	—	$	10,688	$	—	$	10,688
Liabilities
Derivative financial instruments	$	—	$	11,907	$	—	$	11,907

Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2012

(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, 2012
Assets
Derivative financial instruments	$	—	$	288	$	—	$	288
Liabilities
Derivative financial instruments	$	—	$	21,423	$	—	$	21,423

The fair value estimates presented herein are based on information available to management as of June 30, 2013 and December 31, 2012.  These estimates are not necessarily indicative of the amounts MAALP could ultimately realize.  See also discussions in "Financial Statements – Notes to Consolidated Financial Statements", Note 8.

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Notes Payable (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Debt Structure [Table Text Block]

	Borrowed Balance		Effective Rate		Contract Maturity
Fixed Rate Secured Debt
Individual property mortgages	$	388,759	4.7	%	6/2/2019
FNMA conventional credit facilities	50,000		4.7	%	3/31/2017
Credit facility balances with:
LIBOR-based interest rate swaps	284,000		5.3	%	6/22/2014
Total fixed rate secured debt	$	722,759	4.9	%	4/28/2017
Variable Rate Secured Debt (1)
FNMA conventional credit facilities	$	214,721	0.7	%	9/6/2016
FNMA tax-free credit facilities	69,515		0.9	%	8/11/2031
Freddie Mac credit facilities	64,247		0.7	%	7/1/2014
Freddie Mac mortgage	15,200		3.5	%	1/1/2016
Total variable rate secured debt	$	363,683	0.9	%	2/14/2019
Total Secured Debt	$	1,086,442	3.6	%	12/4/2017
Unsecured Debt
Variable rate credit facility	$	125,000	1.4	%	11/1/2015
Term loan fixed with swaps	150,000		2.4	%	3/1/2017
Fixed rate senior private placement bonds	310,000		4.5	%	7/27/2021
Total Unsecured Debt	$	585,000	3.3	%	3/20/2019
Total Outstanding Debt	$	1,671,442	3.5	%	5/18/2018

⁽¹⁾ Includes capped balances.

MAALP has additional requirements related to $20.2 million of tax-free bonds issued by MAA but held within the FNMA facility. These amounts are not included in our debt discussion above or within our Consolidated Balance Sheets as MAALP is not the legal borrower of the bonds; however, because of MAALP's obligations under the FNMA facility, we could be required to pay related principal, interest, and other costs if MAA were to default on its payments.

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Revenues and NOI for Reportable Segment

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Large Market Same Store	$	58,142		$	55,111		$	115,421		$	109,043
Secondary Market Same Store	44,849			43,342			89,098			86,014
Non-Same Store and Other	18,133			8,560			33,993			13,431
Total property revenues	121,124			107,013			238,512			208,488
Management fee income	141			209			319			478
Total operating revenues	$	121,265		$	107,222		$	238,831		$	208,966
NOI
Large Market Same Store	$	34,424		$	32,217		$	69,004		$	63,653
Secondary Market Same Store	26,841			25,735			53,547			50,792
Non-Same Store and Other	12,302			8,110			23,397			13,890
Total NOI	73,567			66,062			145,948			128,335
Discontinued operations NOI included above	(1,165		)	(2,992		)	(2,518		)	(6,112		)
Management fee income	141			209			319			478
Depreciation and amortization	(29,772		)	(27,415		)	(59,506		)	(53,572		)
Acquisition expense	(489		)	(389		)	(499		)	(409		)
Property management expense	(4,282		)	(4,961		)	(9,060		)	(9,885		)
General and administrative expense	(2,410		)	(2,816		)	(5,300		)	(5,845		)
Merger related expenses	(5,737		)	—			(5,737		)	—
Interest and other non-property (loss) income	(5		)	84			13			198
Interest expense	(14,159		)	(12,577		)	(28,190		)	(25,253		)
(Loss) gain on debt extinguishment	(1		)	(15		)	(62		)	5
Amortization of deferred financing costs	(763		)	(753		)	(1,528		)	(1,409		)
Net casualty gain (loss) and other settlement proceeds	438			—			454			(9		)
Gain on sale of non-depreciable assets	—			(3		)	—			(3		)
Gain (loss) from real estate joint ventures	48			(69		)	102			(100		)
Discontinued operations	32,496			14,056			33,189			24,486
Net income attributable to noncontrolling interests	(160		)	(135		)	(319		)	(283		)
Net income available for Mid-America Apartments, L.P. common unitholders	$	47,747		$	28,286		$	67,306		$	50,622

Assets for Reportable Segment

	June 30, 2013		December 31, 2012
Assets
Large Market Same Store	$	1,187,218	$	1,108,827
Secondary Market Same Store	695,113		654,315
Non-Same Store and Other	678,361		728,209
Corporate assets	60,028		38,520
Total assets	$	2,620,720	$	2,529,871

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Document Statement (USD $)	6 Months Ended
	Jun. 30, 2013	Jul. 29, 2013
Entity Information [Line Items]
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
Document Type	8-K
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	MAA
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,735,722
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 2,896,227,801

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Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2013

Notes To Financial Statements [Abstract]

Summary of Discontinued Operations

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues
Rental revenues	$	1,984		$	5,341		$	4,317		$	11,143
Other revenues	129			514			296			1,085
Total revenues	2,113			5,855			4,613			12,228
Expenses
Property operating expenses	948			2,879			2,059			6,164
Depreciation and amortization	371			1,541			986			3,199
Interest expense	73			330			154			705
Total expense	1,392			4,750			3,199			10,068
Income from discontinued operations before gain on sale	721			1,105			1,414			2,160
Net loss on insurance and other settlement proceeds on discontinued operations	(5		)	(2		)	(5		)	(56		)
Gain on sale of discontinued operations	31,780			12,953			31,780			22,382
Income from discontinued operations	$	32,496		$	14,056		$	33,189		$	24,486