10-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_______________________________________
Form 10-Q
(Mark One)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2015
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period fromto
Commission File Number 1-13232 (Apartment Investment and Management Company)
Commission File Number 0-24497 (AIMCO Properties, L.P.)
Apartment Investment and Management Company
AIMCO Properties, L.P.
(Exact name of registrant as specified in its charter)

Maryland (Apartment Investment and Management Company)	84-1259577
Delaware (AIMCO Properties, L.P.)	84-1275621
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
4582 South Ulster Street, Suite 1100
Denver, Colorado	80237
(Address of principal executive offices)	(Zip Code)
(303) 757-8101
(Registrant’s telephone number, including area code)
Not Applicable
(Former name, former address, and former fiscal year, if changed since last report)

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
Apartment Investment and Management Company:
Large accelerated filer	x		Accelerated filer	o
Non-accelerated filer	o	(Do not check if a smaller reporting company)	Smaller reporting company	o
AIMCO Properties, L.P.:
Large accelerated filer	o		Accelerated filer	x
Non-accelerated filer	o	(Do not check if a smaller reporting company)	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Apartment Investment and Management Company: Yes	o	No	x	AIMCO Properties, L.P.: Yes	o	No	x

_______________________________________________________

The number of shares of Apartment Investment and Management Company

Class A Common Stock outstanding as of November 3, 2015: 156,423,545

The number of Partnership Common Units outstanding as of November 3, 2015: 163,972,576

EXPLANATORY NOTE

This filing combines the reports on Form 10-Q for the quarterly period ended September 30, 2015, of Apartment Investment and Management Company, or Aimco, and AIMCO Properties, L.P., or the Aimco Operating Partnership. Where it is important to distinguish between the two entities, we refer to them specifically. Otherwise, references to “we,” “us” or “our” mean, collectively, Aimco, the Aimco Operating Partnership and their consolidated entities.

Aimco, a Maryland corporation, is a self-administered and self-managed real estate investment trust, or REIT. Aimco, through wholly-owned subsidiaries, is the general and special limited partner of and, as of September 30, 2015, owned a 95.4% ownership interest in the common partnership units of, the Aimco Operating Partnership. The remaining 4.6% interest is owned by limited partners. As the sole general partner of the Aimco Operating Partnership, Aimco has exclusive control of the Aimco Operating Partnership’s day-to-day management.

The Aimco Operating Partnership holds all of Aimco’s assets and manages the daily operations of Aimco’s business. Pursuant to the Aimco Operating Partnership agreement, Aimco is required to contribute to the Aimco Operating Partnership any assets which it may acquire including all proceeds from the offerings of its securities. In exchange for the contribution of these assets, Aimco receives additional interests in the Aimco Operating Partnership with similar terms (e.g., if Aimco contributes proceeds of a stock offering, Aimco receives partnership units with terms substantially similar to the stock issued by Aimco).

We believe combining the periodic reports of Aimco and the Aimco Operating Partnership into this single report provides the following benefits:

• We present our business as a whole, in the same manner our management views and operates the business;

• We eliminate duplicative disclosure and provide a more streamlined and readable presentation since a substantial portion of the disclosures apply to both Aimco and the Aimco Operating Partnership; and

• We save time and cost through the preparation of a single combined report rather than two separate reports.

We operate Aimco and the Aimco Operating Partnership as one enterprise, the management of Aimco directs the management and operations of the Aimco Operating Partnership, and the members of the Board of Directors of Aimco are identical to those of the Aimco Operating Partnership.

We believe it is important to understand the few differences between Aimco and the Aimco Operating Partnership in the context of how Aimco and the Aimco Operating Partnership operate as a consolidated company. Aimco has no assets or liabilities other than its investment in the Aimco Operating Partnership. Also, Aimco is a corporation that issues publicly traded equity from time to time, whereas the Aimco Operating Partnership is a partnership that has no publicly traded equity. Except for the net proceeds from stock offerings by Aimco, which are contributed to the Aimco Operating Partnership in exchange for additional limited partnership interests (of a similar type and in an amount equal to the shares of stock sold in the offering), the Aimco Operating Partnership generates all remaining capital required by its business. These sources include the Aimco Operating Partnership’s working capital, net cash provided by operating activities, borrowings under its revolving credit facility, the issuance of debt and equity securities, including additional partnership units, and proceeds received from the sale of apartment communities.

Equity, partners’ capital and noncontrolling interests are the main areas of difference between the consolidated financial statements of Aimco and those of the Aimco Operating Partnership. Interests in the Aimco Operating Partnership held by entities other than Aimco, which we refer to as OP Units, are classified within partners’ capital in the Aimco Operating Partnership’s financial statements and as noncontrolling interests in Aimco’s financial statements.

To help investors understand the differences between Aimco and the Aimco Operating Partnership, this report provides separate consolidated financial statements for Aimco and the Aimco Operating Partnership; a single set of consolidated notes to such financial statements that includes separate discussions of each entity’s stockholders’ equity or partners’ capital, as applicable; and a combined Management’s Discussion and Analysis of Financial Condition and Results of Operations section that includes discrete information related to each entity.

This report also includes separate Part I, Item 4. Controls and Procedures sections and separate Exhibits 31 and 32 certifications for Aimco and the Aimco Operating Partnership in order to establish that the requisite certifications have been made and that Aimco and the Aimco Operating Partnership are both compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and 18 U.S.C. §1350.

1

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

AIMCO PROPERTIES, L.P.

TABLE OF CONTENTS

FORM 10-Q

		Page
	PART I. FINANCIAL INFORMATION
ITEM 1.	Financial Statements
	Apartment Investment and Management Company:
	Condensed Consolidated Balance Sheets as of September 30, 2015 and December 31, 2014 (Unaudited)	3
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2015 and 2014 (Unaudited)	4
	Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2015 and 2014 (Unaudited)	5
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2015 and 2014 (Unaudited)	6
	AIMCO Properties, L.P.:
	Condensed Consolidated Balance Sheets as of September 30, 2015 and December 31, 2014 (Unaudited)	7
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2015 and 2014 (Unaudited)	8
	Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2015 and 2014 (Unaudited)	9
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2015 and 2014 (Unaudited)	10
	Notes to the Condensed Consolidated Financial Statements of Apartment Investment and Management Company and AIMCO Properties, L.P. (Unaudited)	11
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	25
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	47
ITEM 4.	Controls and Procedures	47
	PART II. OTHER INFORMATION
ITEM 1A.	Risk Factors	47
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	48
ITEM 6.	Exhibits	49
Signatures		50

2

PART I. FINANCIAL INFORMATION

ITEM 1. Financial Statements

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

(Unaudited)

	September 30, 2015			December 31, 2014
ASSETS
Buildings and improvements	$	6,421,572		$	6,259,318
Land	1,878,350			1,885,640
Total real estate	8,299,922			8,144,958
Accumulated depreciation	(2,719,651		)	(2,672,179		)
Net real estate ($342,568 and $360,160 related to VIEs)	5,580,271			5,472,779
Cash and cash equivalents ($19,944 and $17,108 related to VIEs)	45,241			28,971
Restricted cash ($34,930 and $36,196 related to VIEs)	93,230			91,445
Other assets ($170,046 and $182,108 related to VIEs)	478,961			476,727
Assets held for sale	19,959			27,106
Total assets	$	6,217,662		$	6,097,028
LIABILITIES AND EQUITY
Non-recourse property debt ($327,403 and $336,471 related to VIEs)	$	3,807,699		$	4,022,809
Revolving credit facility borrowings	128,200			112,330
Total indebtedness	3,935,899			4,135,139
Accounts payable	37,311			41,919
Accrued liabilities and other ($172,290 and $135,644 related to VIEs)	324,746			279,077
Deferred income	65,694			81,882
Liabilities related to assets held for sale	17,311			28,969
Total liabilities	4,380,961			4,566,986
Preferred noncontrolling interests in Aimco Operating Partnership	87,937			87,937
Commitments and contingencies (Note 6)
Equity:
Perpetual Preferred Stock	159,126			186,126
Common Stock, $0.01 par value, 500,787,260 shares authorized, 156,421,276 and 146,403,274 shares issued/outstanding at September 30, 2015 and December 31, 2014, respectively	1,564			1,464
Additional paid-in capital	4,064,729			3,696,143
Accumulated other comprehensive loss	(6,810		)	(6,456		)
Distributions in excess of earnings	(2,616,919		)	(2,649,542		)
Total Aimco equity	1,601,690			1,227,735
Noncontrolling interests in consolidated real estate partnerships	164,439			233,296
Common noncontrolling interests in Aimco Operating Partnership	(17,365		)	(18,926		)
Total equity	1,748,764			1,442,105
Total liabilities and equity	$	6,217,662		$	6,097,028

See notes to condensed consolidated financial statements.

3

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
REVENUES
Rental and other property revenues	$	240,382		$	239,873		$	717,308		$	719,501
Tax credit and asset management revenues	6,005			6,970			18,127			22,684
Total revenues	246,387			246,843			735,435			742,185
OPERATING EXPENSES
Property operating expenses	88,621			95,240			272,043			289,008
Investment management expenses	1,905			1,279			4,594			3,552
Depreciation and amortization	77,237			69,437			226,819			211,143
Provision for real estate impairment losses	—			1,413			—			1,413
General and administrative expenses	11,013			10,658			33,727			31,304
Other expenses, net	3,590			1,349			7,521			7,223
Total operating expenses	182,366			179,376			544,704			543,643
Operating income	64,021			67,467			190,731			198,542
Interest income	1,737			1,787			5,167			5,187
Interest expense	(48,285		)	(57,806		)	(151,410		)	(168,613		)
Other, net	(1,983		)	1,733			631			(57		)
Income before income taxes and gain on dispositions	15,490			13,181			45,119			35,059
Income tax benefit	8,279			5,005			21,014			13,110
Income from continuing operations	23,769			18,186			66,133			48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Net income	23,769			144,515			196,607			310,652
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	785			(8,337		)	(4,082		)	(21,952		)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,736		)	(1,601		)	(5,208		)	(4,808		)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(893		)	(6,549		)	(8,263		)	(13,895		)
Net income attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Net income attributable to Aimco	21,925			128,028			179,054			269,997
Net income attributable to Aimco preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Earnings attributable to Aimco per common share – basic (Note 7):
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to Aimco per common share – diluted (Note 7):
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81
Dividends declared per common share	$	0.30		$	0.26		$	0.88		$	0.78

See notes to condensed consolidated financial statements.

4

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Other comprehensive (loss) income:
Unrealized losses on interest rate swaps	(892		)	(61		)	(1,517		)	(1,488		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	418			421			1,260			1,265
Unrealized gains (losses) on debt securities classified as available-for-sale	1,111			(566		)	(51		)	(618		)
Other comprehensive income (loss)	637			(206		)	(308		)	(841		)
Comprehensive income	24,406			144,309			196,299			309,811
Comprehensive income attributable to noncontrolling interests	(1,888		)	(16,555		)	(17,597		)	(40,728		)
Comprehensive income attributable to Aimco	$	22,518		$	127,754		$	178,702		$	269,083

See notes to condensed consolidated financial statements.

5

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended
	September 30,
	2015			2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	196,607		$	310,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	226,819			211,143
Gain on dispositions of real estate, net of tax	(130,474		)	(262,483		)
Other adjustments	(17,137		)	204
Net changes in operating assets and operating liabilities	(17,371		)	(26,127		)
Net cash provided by operating activities	258,444			233,389
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of real estate	(142,207		)	(132,463		)
Capital expenditures	(277,575		)	(277,214		)
Proceeds from dispositions of real estate	227,911			564,687
Purchases of corporate assets	(4,625		)	(6,405		)
Change in restricted cash	2,900			(33,784		)
Other investing activities	(22,123		)	854
Net cash (used in) provided by investing activities	(215,719		)	115,675
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from non-recourse property debt	232,994			83,130
Principal repayments on non-recourse property debt	(418,744		)	(376,713		)
Net borrowings (repayments) on revolving credit facility	15,870			(35,950		)
Proceeds from issuance of Preferred Stock	—			123,620
Proceeds from issuance of Common Stock	366,580			—
Redemption and repurchase of Preferred Stock	(27,000		)	(9,516		)
Payment of dividends to holders of Preferred Stock	(8,342		)	(3,481		)
Payment of dividends to holders of Common Stock	(137,268		)	(113,988		)
Payment of distributions to noncontrolling interests	(46,026		)	(42,969		)
Other financing activities	(4,519		)	238
Net cash used in financing activities	(26,455		)	(375,629		)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,270			(26,565		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	28,971			55,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	45,241		$	29,186

See notes to condensed consolidated financial statements.

6

AIMCO PROPERTIES, L.P.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

	September 30, 2015			December 31, 2014
ASSETS
Buildings and improvements	$	6,421,572		$	6,259,318
Land	1,878,350			1,885,640
Total real estate	8,299,922			8,144,958
Accumulated depreciation	(2,719,651		)	(2,672,179		)
Net real estate ($342,568 and $360,160 related to VIEs)	5,580,271			5,472,779
Cash and cash equivalents ($19,944 and $17,108 related to VIEs)	45,241			28,971
Restricted cash ($34,930 and $36,196 related to VIEs)	93,230			91,445
Other assets ($170,046 and $182,108 related to VIEs)	478,961			476,727
Assets held for sale	19,959			27,106
Total assets	$	6,217,662		$	6,097,028
LIABILITIES AND EQUITY
Non-recourse property debt ($327,403 and $336,471 related to VIEs)	$	3,807,699		$	4,022,809
Revolving credit facility borrowings	128,200			112,330
Total indebtedness	3,935,899			4,135,139
Accounts payable	37,311			41,919
Accrued liabilities and other ($172,290 and $135,644 related to VIEs)	324,746			279,077
Deferred income	65,694			81,882
Liabilities related to assets held for sale	17,311			28,969
Total liabilities	4,380,961			4,566,986
Redeemable preferred units	87,937			87,937
Commitments and contingencies (Note 6)
Partners’ Capital:
Preferred units	159,126			186,126
General Partner and Special Limited Partner	1,442,564			1,041,609
Limited Partners	(17,365		)	(18,926		)
Partners’ capital attributable to the Aimco Operating Partnership	1,584,325			1,208,809
Noncontrolling interests in consolidated real estate partnerships	164,439			233,296
Total partners’ capital	1,748,764			1,442,105
Total liabilities and partners’ capital	$	6,217,662		$	6,097,028

See notes to condensed consolidated financial statements.

7

AIMCO PROPERTIES, L.P.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per unit data)

(Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
REVENUES
Rental and other property revenues	$	240,382		$	239,873		$	717,308		$	719,501
Tax credit and asset management revenues	6,005			6,970			18,127			22,684
Total revenues	246,387			246,843			735,435			742,185
OPERATING EXPENSES
Property operating expenses	88,621			95,240			272,043			289,008
Investment management expenses	1,905			1,279			4,594			3,552
Depreciation and amortization	77,237			69,437			226,819			211,143
Provision for real estate impairment losses	—			1,413			—			1,413
General and administrative expenses	11,013			10,658			33,727			31,304
Other expenses, net	3,590			1,349			7,521			7,223
Total operating expenses	182,366			179,376			544,704			543,643
Operating income	64,021			67,467			190,731			198,542
Interest income	1,737			1,787			5,167			5,187
Interest expense	(48,285		)	(57,806		)	(151,410		)	(168,613		)
Other, net	(1,983		)	1,733			631			(57		)
Income before income taxes and gain on dispositions	15,490			13,181			45,119			35,059
Income tax benefit	8,279			5,005			21,014			13,110
Income from continuing operations	23,769			18,186			66,133			48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Net income	23,769			144,515			196,607			310,652
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	785			(8,337		)	(4,082		)	(21,952		)
Net income attributable to the Aimco Operating Partnership	24,554			136,178			192,525			288,700
Net income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Earnings attributable to the Aimco Operating Partnership per common unit – basic (Note 7):
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to the Aimco Operating Partnership per common unit – diluted (Note 7):
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81
Distributions declared per common unit	$	0.30		$	0.26		$	0.88		$	0.78

See notes to condensed consolidated financial statements.

8

AIMCO PROPERTIES, L.P.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Other comprehensive (loss) income:
Unrealized losses on interest rate swaps	(892		)	(61		)	(1,517		)	(1,488		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	418			421			1,260			1,265
Unrealized gains (losses) on debt securities classified as available-for-sale	1,111			(566		)	(51		)	(618		)
Other comprehensive income (loss)	637			(206		)	(308		)	(841		)
Comprehensive income	24,406			144,309			196,299			309,811
Comprehensive loss (income) attributable to noncontrolling interests	770			(8,419		)	(4,143		)	(22,073		)
Comprehensive income attributable to the Aimco Operating Partnership	$	25,176		$	135,890		$	192,156		$	287,738

See notes to condensed consolidated financial statements.

9

AIMCO PROPERTIES, L.P.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Nine Months Ended
	September 30,
	2015			2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	196,607		$	310,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	226,819			211,143
Gain on dispositions of real estate, net of tax	(130,474		)	(262,483		)
Other adjustments	(17,137		)	204
Net changes in operating assets and operating liabilities	(17,371		)	(26,127		)
Net cash provided by operating activities	258,444			233,389
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of real estate	(142,207		)	(132,463		)
Capital expenditures	(277,575		)	(277,214		)
Proceeds from dispositions of real estate	227,911			564,687
Purchases of corporate assets	(4,625		)	(6,405		)
Change in restricted cash	2,900			(33,784		)
Other investing activities	(22,123		)	854
Net cash (used in) provided by investing activities	(215,719		)	115,675
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from non-recourse property debt	232,994			83,130
Principal repayments on non-recourse property debt	(418,744		)	(376,713		)
Net borrowings (repayments) on revolving credit facility	15,870			(35,950		)
Proceeds from issuance of Preferred Units to Aimco	—			123,620
Proceeds from issuance of common partnership units to Aimco	366,580			—
Redemption and repurchase of Preferred Units from Aimco	(27,000		)	(9,516		)
Payment of distributions to holders of Preferred Units	(13,550		)	(8,289		)
Payment of distributions to General Partner and Special Limited Partner	(137,268		)	(113,988		)
Payment of distributions to Limited Partners	(6,701		)	(6,020		)
Payment of distributions to noncontrolling interests	(34,117		)	(32,141		)
Other financing activities	(4,519		)	238
Net cash used in financing activities	(26,455		)	(375,629		)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,270			(26,565		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	28,971			55,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	45,241		$	29,186

See notes to condensed consolidated financial statements.

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APARTMENT INVESTMENT AND MANAGEMENT COMPANY

AIMCO PROPERTIES, L.P.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

September 30, 2015

(Unaudited)

Note 1 — Organization

Apartment Investment and Management Company, or Aimco, is a Maryland corporation incorporated on January 10, 1994. Aimco is a self-administered and self-managed real estate investment trust, or REIT. AIMCO Properties, L.P., or the Aimco Operating Partnership, is a Delaware limited partnership formed on May 16, 1994, to conduct our business, which is focused on the ownership and management of quality apartment communities located in the largest coastal and job growth markets in the United States.

Aimco, and through its wholly-owned subsidiaries, AIMCO-GP, Inc. and AIMCO-LP Trust, owns a majority of the ownership interests in the Aimco Operating Partnership. Aimco conducts all of its business and owns all of its assets through the Aimco Operating Partnership. Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are referred to as “OP Units.” OP Units include common partnership units, high performance partnership units and partnership preferred units, which we refer to as common OP Units, HPUs and preferred OP Units, respectively. We also refer to HPUs as common OP Unit equivalents. At September 30, 2015, after eliminations for units held by consolidated entities, the Aimco Operating Partnership had 164,005,054 common partnership units and equivalents outstanding. At September 30, 2015, Aimco owned 156,421,276 of the common partnership units (95.4% of the common partnership units and equivalents) of the Aimco Operating Partnership and Aimco had outstanding an equal number of shares of its Class A Common Stock, which we refer to as Common Stock.

Except as the context otherwise requires, “we,” “our” and “us” refer to Aimco, the Aimco Operating Partnership and their consolidated subsidiaries, collectively.

As of September 30, 2015, we owned an equity interest in 143 conventional apartment communities with 41,429 apartment homes and 56 affordable apartment communities with 8,685 apartment homes. Of these, we consolidated 139 conventional apartment communities with 41,287 apartment homes and 49 affordable apartment communities with 7,998 apartment homes. Conventional and affordable apartment communities generated 90% and 10%, respectively, of the proportionate property net operating income (as defined in Note 8 and excluding amounts related to apartment communities sold or classified as held for sale) during the nine months ended September 30, 2015.

Note 2 — Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations, although management believes the disclosures are adequate to prevent the information presented from being misleading. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2015, are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.

The balance sheets of Aimco and the Aimco Operating Partnership at December 31, 2014, have been derived from their respective audited financial statements at that date, but do not include all of the information and disclosures required by GAAP for complete financial statements. For further information, refer to the financial statements and notes thereto included in Aimco’s and the Aimco Operating Partnership’s combined Annual Report on Form 10-K for the year ended December 31, 2014. Except where indicated, the footnotes refer to both Aimco and the Aimco Operating Partnership.

Principles of Consolidation

Aimco’s accompanying condensed consolidated financial statements include the accounts of Aimco, the Aimco Operating Partnership, and their consolidated subsidiaries. The Aimco Operating Partnership’s condensed consolidated financial statements include the accounts of the Aimco Operating Partnership and its consolidated entities.

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We consolidate all variable interest entities for which we are the primary beneficiary. Generally, a variable interest entity, or VIE, is a legal entity in which the equity investors do not have the characteristics of a controlling financial interest or the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including, but not limited to: which activities most significantly impact the VIE’s economic performance and which party controls such activities; the amount and characteristics of our investment; the obligation or likelihood for us or other investors to provide financial support; and the similarity with and significance to our business activities and the business activities of the other investors. Significant judgments related to these determinations include estimates about the current and future fair values and performance of real estate held by these VIEs and general market conditions.

As of September 30, 2015, we were the primary beneficiary of, and therefore consolidated, 61 VIEs, which owned 47 apartment communities with 7,459 apartment homes. Substantially all these VIEs are partnerships that are involved in the ownership or operation of qualifying affordable housing apartment communities and which are structured to provide for the pass-through of low-income housing tax credits and deductions to their partners. Real estate with a carrying value of $342.6 million collateralized $327.4 million of debt of those VIEs. Any significant amounts of assets and liabilities related to our consolidated VIEs are identified parenthetically on our accompanying condensed consolidated balance sheets. The creditors of the consolidated VIEs do not have recourse to our general credit.

In addition to the consolidated VIEs discussed above, at September 30, 2015, our consolidated financial statements included certain consolidated and unconsolidated VIEs that are part of the legacy asset management business we sold during 2012, which is discussed in Note 4. The assets and liabilities related to these consolidated and unconsolidated VIEs are each condensed into single line items within other assets and accrued liabilities and other, respectively, in our condensed consolidated balance sheets.

Generally, we consolidate real estate partnerships and other entities that are not variable interest entities when we own, directly or indirectly, a majority voting interest in the entity or are otherwise able to control the entity. All significant intercompany balances and transactions have been eliminated in consolidation.

Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are reflected in Aimco’s accompanying balance sheets as noncontrolling interests in Aimco Operating Partnership. Interests in partnerships consolidated into the Aimco Operating Partnership that are held by third parties are reflected in our accompanying balance sheets as noncontrolling interests in consolidated real estate partnerships. The assets of consolidated real estate partnerships owned or controlled by the Aimco Operating Partnership generally are not available to pay creditors of Aimco or the Aimco Operating Partnership.

Temporary Equity and Partners’ Capital

The following table presents a reconciliation of the Aimco Operating Partnership’s Preferred OP Units from December 31, 2014 to September 30, 2015 (in thousands). These amounts are presented within temporary equity in Aimco’s condensed consolidated balance sheets as preferred noncontrolling interests in the Aimco Operating Partnership, and within temporary capital in the Aimco Operating Partnership’s condensed consolidated balance sheets as redeemable preferred units.

Balance, December 31, 2014	$	87,937
Distributions to preferred unitholders	(5,208		)
Net income	5,208
Balance, September 30, 2015	$	87,937

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Aimco Equity (including Noncontrolling Interests)

The following table presents a reconciliation of Aimco’s consolidated permanent equity accounts from December 31, 2014 to September 30, 2015 (in thousands):

	Aimco Equity			Noncontrolling interests in consolidated real estate partnerships			Common noncontrolling interests in Aimco Operating Partnership			Total Equity
Balance, December 31, 2014	$	1,227,735		$	233,296		$	(18,926	)	$	1,442,105
Issuance of Common Stock	366,580			—			—			366,580
Repurchase of preferred stock	(27,000		)	—			—			(27,000		)
Preferred stock dividends	(8,342		)	—			—			(8,342		)
Common dividends and distributions	(137,493		)	(72,873		)	(6,701		)	(217,067		)
Redemptions of common OP Units	—			—			(2,612		)	(2,612		)
Amortization of stock-based compensation cost	5,572			—			—			5,572
Effect of changes in ownership for consolidated entities	(4,328		)	—			2,628			(1,700		)
Change in accumulated other comprehensive loss	(352		)	61			(17		)	(308		)
Other	264			(127		)	—			137
Net income	179,054			4,082			8,263			191,399
Balance, September 30, 2015	$	1,601,690		$	164,439		$	(17,365	)	$	1,748,764

Partners’ Capital attributable to the Aimco Operating Partnership

The following table presents a reconciliation of the consolidated partners’ capital balances in permanent capital that are attributable to the Aimco Operating Partnership from December 31, 2014 to September 30, 2015 (in thousands):

	Partners’ capital  attributable to the Partnership
Balance, December 31, 2014	$	1,208,809
Issuance of common partnership units to Aimco	366,580
Repurchase of Preferred Units from Aimco	(27,000		)
Distributions to preferred units held by Aimco	(8,342		)
Distributions to common units held by Aimco	(137,493		)
Distributions to common units held by Limited Partners	(6,701		)
Redemption of common OP Units	(2,612		)
Amortization of Aimco stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700		)
Change in accumulated other comprehensive loss	(369		)
Other	264
Net income	187,317
Balance, September 30, 2015	$	1,584,325

A separate reconciliation of noncontrolling interests in consolidated real estate partnerships and total partners’ capital for the Aimco Operating Partnership is not presented as these amounts are identical to the corresponding noncontrolling interests in consolidated real estate partnerships and total equity for Aimco, which are presented above.

Use of Estimates

The preparation of our condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts included in the financial statements and accompanying notes thereto. Actual results could differ from those estimates.

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Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update 2015-02, which significantly changes the consolidation analysis required under GAAP for VIEs. Under this revised guidance, it is less likely that certain fees, such as asset management fees, would be considered variable interests and therefore fewer entities may be considered VIEs. Additionally, limited partnerships may no longer be viewed as VIEs if the limited partners hold certain rights over the general partner. Alternatively, limited partnerships not previously viewed as VIEs may now be considered VIEs in the absence of such rights. For public companies, the guidance in ASU 2015-02 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015, with early adoption permitted. We have not yet determined the effect ASU 2015-02 will have on our consolidated financial statements.

In April 2015, the FASB issued ASU 2015-03 to revise the presentation of debt issuance costs. Under ASU 2015-03, entities generally will present debt issuance costs in their balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the deferred costs will continue to be included in interest expense. In August 2015, the FASB issued ASU 2015-15 to clarify the SEC staff’s position regarding the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements due to the lack of guidance on this topic in the recently issued ASU 2015-03. The SEC staff recently announced that it would not object to an entity deferring and presenting debt issuance costs associated with line-of-credit arrangements as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the arrangement, regardless of whether there are any outstanding borrowings under the arrangement.

For public companies, the guidance in ASUs 2015-03 and 2015-15, which is to be applied retrospectively to all prior periods, is effective for fiscal years beginning after December 15, 2015, with early adoption permitted for financial statements that have not been previously issued. We do not expect ASUs 2015-03 and 2015-15 to have a significant effect on our consolidated financial statements.

Note 3 — Disposals and Assets Held for Sale

During the three months ended September 30, 2015, we did not sell any consolidated apartment communities, and during the nine months ended September 30, 2015, we sold eight consolidated apartment communities with an aggregate of 2,891 apartment homes and during the year ended December 31, 2014, we sold 30 consolidated apartment communities with an aggregate of 9,067 apartment homes.

In addition to the apartment communities we sold, we are currently marketing for sale certain apartment communities that are inconsistent with our long-term investment strategy. At the end of each reporting period, we evaluate whether such apartment communities meet the criteria to be classified as held for sale. As of September 30, 2015, we had two apartment communities with 476 apartment homes classified as held for sale.

The results of operations for the apartment communities sold or classified as held for sale are reflected within income from continuing operations in our condensed consolidated statements of operations. The apartment communities sold or classified as held for sale during 2015 generated $1.1 million and $6.6 million of net income (before gains on dispositions) during the three and nine months ended September 30, 2015, respectively. The apartment communities sold or classified as held for sale during 2015 and 2014, generated $6.7 million and $29.0 million of net income (before gains on dispositions) during the three and nine months ended September 30, 2014, respectively.

The sale of these apartment communities resulted in gains on disposition of real estate of $130.5 million for the nine months ended September 30, 2015. For the three and nine months ended September 30, 2014, the sale of apartment communities resulted in gains on disposition of real estate of $126.3 million and $262.5 million, respectively, which are net of $21.1 million and $29.8 million of related income taxes. We report gains on disposition net of incremental direct costs incurred in connection with the transactions, including any prepayment penalties incurred upon repayment of property debt collateralized by the apartment communities being sold. Such prepayment penalties totaled $19.8 million for consolidated dispositions during the nine months ended September 30, 2015 ($13.2 million of which represented the mark-to-market adjustment), and $13.6 million and $22.1 million for consolidated dispositions during the three and nine months ended September 30, 2014, respectively ($9.4 million and $15.1 million of which represented the mark-to-market adjustments). In connection with sales of apartment communities during the nine months ended September 30, 2015, the purchasers assumed $6.1 million of non-recourse property debt. In connection with sales of apartment communities during the nine months ended September 30, 2014, the purchasers assumed $56.9 million of non-recourse property debt.

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Note 4 — Other Significant Transactions

Investments in Apartment Communities

In March 2015, we acquired for $38.3 million a 94-apartment home community located in Atlanta, Georgia.

In April 2015, we acquired for $63.0 million a 115-apartment home community located in Cambridge, Massachusetts at the completion of its construction. At September 30, 2015, 77% of the apartment homes were occupied.

In June 2015, we purchased a 91-apartment home community under construction at the time of acquisition. This community is also located in Cambridge, Massachusetts, and is two blocks from the apartment community described in the prior paragraph. At closing, we paid $27.9 million and agreed to fund the remaining construction costs. We expect a total investment of $45.0 million in this community, of which $38.8 million has been invested through September 30, 2015. Construction of the apartment homes was completed during the third quarter, and we began lease-up in October. Construction of the community's amenities is expected to be complete by year end.

Asset Management Business Disposition

In December 2012, we sold the Napico portfolio, our legacy asset management business. The transaction was primarily seller-financed, and the associated notes are scheduled to be repaid over several years. The notes will be repaid from the operation and liquidation of the portfolio and are collateralized by the buyer’s interests in the portfolio. 

In accordance with the provisions of GAAP applicable to sales of real estate or interests therein, for accounting purposes, we have not recognized the sale and are accounting for the transaction under the profit sharing method. Until full payment has been received for the seller-financed notes, we will continue to recognize the portfolio’s assets and liabilities, each condensed into single line items within other assets and accrued liabilities and other, respectively, in our consolidated balance sheets, for all dates following the transaction. Similarly, we will continue to recognize the portfolio’s results of operations, also condensed into a single line item within our consolidated statements of operations, for periods subsequent to the transaction. To date we have received all required payments under the seller-financed notes.

At September 30, 2015, the Napico portfolio consisted of 14 partnerships that held investments in 12 apartment communities that were consolidated and 47 apartment communities that were accounted for under the equity or cost methods of accounting. The portfolio’s assets and liabilities included in our condensed consolidated balance sheets are summarized below (in thousands):

	September 30, 2015		December 31, 2014
Real estate, net	$	107,407	$	117,851
Cash and cash equivalents	33,715		23,133
Investment in unconsolidated real estate partnerships	766		8,392
Other assets	16,419		11,759
Total assets	$	158,307	$	161,135
Total indebtedness	$	143,987	$	113,641
Accrued and other liabilities	9,299		4,417
Total liabilities	$	153,286	$	118,058
Noncontrolling interests in consolidated real estate partnerships	697		44,106
Equity attributable to Aimco and the Aimco Operating Partnership	4,324		(1,029		)
Total liabilities and equity	$	158,307	$	161,135

During the nine months ended September 30, 2015, Napico sold a property, resulting in a reduction of real estate, and Napico refinanced a property, resulting in an increase in indebtedness and a reduction in noncontrolling interests in consolidated real estate partnerships, following distribution of the proceeds.

Summarized information regarding the Napico portfolio’s results of operations, including any expense we recognize under the profit sharing method, is shown below in thousands. The net income (loss) related to Napico (before income taxes and noncontrolling interests) is included in other, net in our condensed consolidated statements of operations.

15

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Revenues	$	6,120		$	9,884		$	19,054		$	21,234
Expenses	(5,399		)	(5,114		)	(15,876		)	(15,992		)
Equity in loss of unconsolidated entities, gains or losses on dispositions and other, net	(2,614		)	(3,246		)	(2,420		)	(5,198		)
Net (loss) income related to legacy asset management business	(1,893		)	1,524			758			44
Income tax benefit (expense) associated with legacy asset management business	108			101			(1,916		)	411
Loss (income) allocated to noncontrolling interests in consolidated real estate partnerships	2,161			(1,768		)	4,672			(1,580		)
Net income (losses) of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$	376		$	(143	)	$	3,514		$	(1,125	)

Revenues decreased during the three and nine months ended September 30, 2015, as compared to the three and nine months ended September 30, 2014, due to an adjustment in 2014 to increase rent subsidies to reflect current market rates for one of the apartment communities in this portfolio.

Based on our limited economic ownership in this portfolio, most of the assets and liabilities are allocated to noncontrolling interests and do not significantly affect our consolidated equity and partners’ capital. Additionally, the operating results of this portfolio generally have an insignificant effect on the amounts of income or loss attributable to us. Income or loss attributable to these noncontrolling interests will continue to be recognized commensurate with the recognition of the results of operations of the portfolio. If full payment is received on the notes and we meet the requirements to recognize the sale for accounting purposes, we expect to recognize a gain attributable to Aimco and the Aimco Operating Partnership.

Equity and Partners’ Capital Transactions

During the nine months ended September 30, 2015, Aimco issued 9,430,000 shares of its Common Stock, par value $0.01 per share, in an underwritten public offering, for net proceeds per share of $38.90. The offering generated net proceeds to Aimco of $366.6 million, net of issuance costs.  Aimco contributed the net proceeds from the sale of Common Stock to the Aimco Operating Partnership in exchange for a number of common partnership units equal to the number of shares of Common Stock issued.

Using the proceeds from this offering, during the nine months ended September 30, 2015, we repaid the then outstanding balance on our Credit Agreement, expanded our unencumbered asset pool, funded redevelopment and property upgrades investments that would otherwise have been funded with property debt on a leverage-neutral basis, and Aimco redeemed the remaining outstanding shares of its Series A Community Reinvestment Act Preferred Stock at its par value of $27.0 million. In connection with Aimco’s redemption of preferred stock, the Aimco Operating Partnership redeemed from Aimco an equal number of the corresponding class of partnership preferred units.

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Note 5 — Fair Value Measurements

Recurring Fair Value Measurements

We measure at fair value on a recurring basis our investment in the securitization trust that holds certain of our property debt, which we classify as available for sale, or AFS, securities, and our interest rate swaps. Information regarding these items measured at fair value, both of which are classified within Level 2 of the GAAP fair value hierarchy, is presented below (in thousands):

	AFS Investments			Interest Rate Swaps			Total
Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804
Investment accretion included in interest income	2,833			—			2,833
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,265			1,265
Unrealized losses included in equity and partners’ capital	(618		)	(1,488		)	(2,106		)
Fair value at September 30, 2014	$	60,623		$	(4,863	)	$	55,760
Fair value at December 31, 2014	$	61,043		$	(5,273	)	$	55,770
Investment accretion included in interest income	3,142			—			3,142
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,260			1,260
Unrealized losses included in equity and partners’ capital	(51		)	(1,517		)	(1,568		)
Fair value at September 30, 2015	$	64,134		$	(5,566	)	$	58,568

Our investments classified as AFS are presented within other assets in the accompanying consolidated balance sheets. We hold several positions in the securitization which pay interest currently, and we also hold the first loss position in the securitization which accrues interest over the term of the investment. We are accreting the discount to the $100.9 million face value of the investments into interest income using the effective interest method over the remaining expected term of the investments, which, as of September 30, 2015, was approximately 5.7 years. Our amortized cost basis for these investments, which represents the original cost adjusted for interest accretion less interest payments received, was $66.7 million and $63.6 million at September 30, 2015 and December 31, 2014, respectively.

We estimate the fair value of these investments in accordance with GAAP using an income and market approach with primarily observable inputs, including yields and other information regarding similar types of investments, and adjusted for certain unobservable inputs specific to these investments. The fair value of the positions that pay interest currently, which typically moves in an inverse relationship with movements in interest rates, exceeded the amortized cost of these investments at the balance sheet dates. The fair value of the first loss position, which is less correlated to movements in interest rates, was less than the amortized cost at the balance sheet dates. We currently expect to hold each of the investments to their maturity dates and we believe we will fully recover our basis in the investments. Accordingly, we believe the current impairment in the fair value, as compared to the amortized cost basis, of the most subordinate tranche of these investments is temporary and we have not recognized any of the decline in value in earnings.

For our variable rate debt, we are sometimes required by limited partners in our consolidated real estate partnerships to limit our exposure to interest rate fluctuations by entering into interest rate swap agreements, which moderate our exposure to interest rate risk by effectively converting the interest on variable rate debt to a fixed rate. We estimate the fair value of interest rate swaps using an income approach with primarily observable inputs including information regarding the hedged variable cash flows and forward yield curves relating to the variable interest rates on which the hedged cash flows are based.

As of September 30, 2015 and December 31, 2014, we had interest rate swaps with aggregate notional amounts of $50.0 million and $50.3 million, respectively. As of September 30, 2015, these swaps had a weighted average remaining term of 5.2 years. We have designated these interest rate swaps as cash flow hedges. The fair value of these swaps is presented within accrued liabilities and other in our condensed consolidated balance sheets, and we recognize any changes in the fair value as an adjustment of accumulated other comprehensive loss within equity and partners’ capital to the extent of their effectiveness.

If the forward rates at September 30, 2015, remain constant, we estimate that during the next 12 months, we would reclassify into earnings approximately $1.7 million of the unrealized losses in accumulated other comprehensive loss. If market interest rates

17

increase above the 3.43% weighted average fixed rate under these interest rate swaps we will benefit from net cash payments due to us from our counterparty to the interest rate swaps.

Fair Value Disclosures

We believe that the aggregate fair value of our cash and cash equivalents, receivables and payables approximates their aggregate carrying amounts at September 30, 2015 and December 31, 2014, due to their relatively short-term nature and high probability of realization. The estimated aggregate fair value of our consolidated total indebtedness was approximately $4.1 billion and $4.4 billion at September 30, 2015 and December 31, 2014, respectively, as compared to aggregate carrying amounts of $3.9 billion and $4.1 billion, respectively. Substantially all of the difference between the fair value and the carrying value of our consolidated indebtedness relates to loans secured by apartment communities we wholly own. We estimate the fair value of our consolidated debt using an income and market approach, including comparison of the contractual terms to observable and unobservable inputs such as market interest rate risk spreads, contractual interest rates, remaining periods to maturity, collateral quality and loan to value ratios on similarly encumbered assets within our portfolio. We classify the fair value of our consolidated debt within Level 3 of the GAAP valuation hierarchy based on the significance of certain of the unobservable inputs used to estimate their fair values.

Note 6 — Commitments and Contingencies

Commitments

In connection with our development, redevelopment and capital improvement activities, we have entered into various construction-related contracts and we have made commitments to complete certain projects, pursuant to financing or other arrangements. As of September 30, 2015, our commitments related to these capital activities totaled approximately $114.8 million, most of which we expect to incur during the next 12 months. Our commitments related to our One Canal Street development project will be funded in part by a $114.0 million non-recourse property loan, of which $48.5 million was available to draw at September 30, 2015.

During the three months ended September 30, 2015, we also entered into a contract to acquire an apartment community currently under construction in Northern California for $320.0 million.  Closing of the acquisition is expected to occur upon completion of construction in the summer of 2016. Consistent with our paired-trade discipline, we intend to fund the acquisition on a leverage neutral basis through a ten-year property loan with the balance funded primarily by proceeds from sales of lower-rated apartment communities.

We also enter into certain commitments for future purchases of goods and services in connection with the operations of our apartment communities. Those commitments generally have terms of one year or less and reflect expenditure levels comparable to our historical expenditures.

Tax Credit Arrangements

We are required to manage certain consolidated real estate partnerships in compliance with various laws, regulations and contractual provisions that apply to our historic and low-income housing tax credit syndication arrangements. In some instances, noncompliance with applicable requirements could result in projected tax benefits not being realized and require a refund or reduction of investor capital contributions, which are reported as deferred income in our condensed consolidated balance sheet, until such time as our obligation to deliver tax benefits is relieved. The remaining compliance periods for our tax credit syndication arrangements range from less than one year to 11 years. We do not anticipate that any material refunds or reductions of investor capital contributions will be required in connection with these arrangements.

Income Taxes

On March 19, 2014, the Internal Revenue Service notified the Aimco Operating Partnership of its intent to audit the 2011 and 2012 tax years.  We do not believe the audit will have any material effect on our unrecognized tax benefits, financial condition or results of operations.

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Legal Matters

In addition to the matters described below, we are a party to various legal actions and administrative proceedings arising in the ordinary course of business, some of which are covered by our general liability insurance program, and none of which we expect to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Limited Partnerships

In connection with our acquisitions of interests in real estate partnerships, we are sometimes subject to legal actions, including allegations that such activities may involve breaches of fiduciary duties to the partners of such real estate partnerships or violations of the relevant partnership agreements. We may incur costs in connection with the defense or settlement of such litigation. We believe that we comply with our fiduciary obligations and relevant partnership agreements. Although the outcome of any litigation is uncertain, we do not expect any such legal actions to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Environmental

Various Federal, state and local laws subject apartment community owners or operators to liability for management, and the costs of removal or remediation, of certain potentially hazardous materials that may be present in the land or buildings of an apartment community. Potentially hazardous materials may include polychlorinated biphenyls, petroleum-based fuels, lead-based paint, or asbestos. Such laws often impose liability without regard to fault or whether the owner or operator knew of, or was responsible for, the presence of such materials. The presence of, or the failure to manage or remediate properly, these materials may adversely affect occupancy at such apartment communities as well as the ability to sell or finance such apartment communities. In addition, governmental agencies may bring claims for costs associated with investigation and remediation actions, damages to natural resources and for potential fines or penalties in connection with such damage or with respect to the improper management of hazardous materials. Moreover, private plaintiffs may potentially make claims for personal injury, disease, disability or other infirmities related to the alleged presence of hazardous materials at an apartment community. In addition to potential environmental liabilities or costs associated with our current apartment communities, we may also be responsible for such liabilities or costs associated with communities we acquire or manage in the future, or apartment communities we no longer own or operate.

We are engaged in discussions with the Environmental Protection Agency, or EPA, regarding contaminated groundwater in a residential area in the vicinity of an Indiana apartment community that has not been owned by us since 2008.  The EPA alleges that we are liable for addressing the contamination in the residential area because a dry cleaner that operated on our former property, prior to our ownership, discharged hazardous materials into the sanitary sewers and the environment. We have undertaken a voluntary remediation of the dry cleaner contamination at our former property under the oversight of the Indiana Department of Environmental Management, or IDEM.  However, IDEM has formally terminated us from the voluntary remediation, and we are presently appealing that termination.  Based on our review of the scientific data, we believe that the presence of hazardous materials in the separate residential area under review by the EPA is attributable to neighboring property owners (including an auto parts manufacturer), and not the dry cleaner.  The EPA is now proposing to list the area on the National Priorities List (i.e., as a Superfund site), which would make the site eligible for additional Federal funding.  Were the site to be listed, the EPA could use the funding to further investigate and clean-up the residential area and could then seek to recoup its costs from responsible parties.  Although the outcome of this process is uncertain, we do not expect the resolution to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

We also have been contacted by regulators and the current owner of a property in Lake Tahoe regarding environmental issues allegedly stemming from the historic operation of a dry cleaner on the site.  An entity owned by us was the former general partner of a now-dissolved company that previously owned the dry cleaner site. The Lahontan Regional Water Quality Control Board, or Board, recently tested domestic wells in the area and found two wells with contaminants linked to dry cleaning.  We entered into an agreement with the Board and the current owner to pay for an alternative water connection at an insignificant cost.  During the three months ended September 30, 2015, the Board sent us and the current owner a proposed cleanup and abatement order that, if entered, would require us and the current owner to perform additional groundwater investigation and corrective actions. We are currently assessing potential legal and technical grounds for challenging and/or narrowing the scope of the proposed order.  Although the outcome of this process is uncertain, we do not expect the resolution to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

We have determined that our legal obligations to remove or remediate certain potentially hazardous materials may be conditional asset retirement obligations, as defined in GAAP. Except in limited circumstances where the asset retirement activities are expected to be performed in connection with a planned construction project or apartment community casualty, we believe that the fair value of our asset retirement obligations cannot be reasonably estimated due to significant uncertainties in the timing and manner of settlement of those obligations. Asset retirement obligations that are reasonably estimable as of September 30, 2015, are immaterial to our consolidated financial condition, results of operations and cash flows.

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Note 7 — Earnings per Share/Unit

Aimco

Aimco calculates earnings per share based on the weighted average number of shares of Common Stock, participating securities, common stock equivalents and dilutive convertible securities outstanding during the period. The following table illustrates Aimco’s calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Income from continuing operations and gain on dispositions attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net income attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Net income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Denominator:
Weighted average common shares outstanding – basic	155,639			145,672			154,994			145,601
Dilutive potential common shares	369			432			418			323
Weighted average common shares outstanding – diluted	156,008			146,104			155,412			145,924
Earnings attributable to Aimco per common share – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to Aimco per common share – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

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The Aimco Operating Partnership

The Aimco Operating Partnership calculates earnings per unit based on the weighted average number of common partnership units and equivalents, participating securities and dilutive convertible securities outstanding during the period. The Aimco Operating Partnership considers both common OP Units and HPUs, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit data presented below. The following table illustrates the Aimco Operating Partnership’s calculation of basic and diluted earnings per unit for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per unit data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Loss (income) from continuing operations and gain on dispositions attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net loss (income) attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Net income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Denominator:
Weighted average common units outstanding – basic	163,241			153,337			162,616			153,326
Dilutive potential common units	369			432			418			323
Weighted average common units outstanding – diluted	163,610			153,769			163,034			153,649
Earnings attributable to the Aimco Operating Partnership per common unit – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to the Aimco Operating Partnership per common unit – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

Aimco and the Aimco Operating Partnership

As of September 30, 2015, the common share equivalents or common partnership unit equivalents that could potentially dilute basic earnings per share or unit in future periods totaled 1.4 million. These securities represent options to purchase shares of Common Stock, which, if exercised, would result in Aimco’s issuance of additional shares and the Aimco Operating Partnership’s issuance to Aimco of additional common partnership units equal to the number of shares purchased under the options. The effect of these securities was dilutive for the three and nine months ended September 30, 2015 and 2014, and accordingly has been included in the denominator for calculating diluted earnings per share and unit during these periods. Participating securities, consisting of unvested restricted shares of Common Stock, receive dividends similar to shares of Common Stock and common partnership units and totaled 0.7 million shares and 0.5 million shares at September 30, 2015 and 2014, respectively. The effect

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of participating securities is included in basic and diluted earnings per share and unit computations for the periods presented above using the two-class method of allocating distributed and undistributed earnings.

Various classes of preferred OP Units of the Aimco Operating Partnership are outstanding. Depending on the terms of each class, these preferred OP Units are convertible into common OP Units or redeemable for cash or, at the Aimco Operating Partnership’s option, Common Stock, and are paid distributions varying from 1.9% to 8.8% per annum per unit. As of September 30, 2015, a total of 3.3 million preferred OP Units were outstanding with an aggregate redemption value of $87.9 million and were potentially redeemable for approximately 2.4 million shares of Common Stock (based on the period end market price), or cash at the Aimco Operating Partnership’s option. The Aimco Operating Partnership has a redemption policy that requires cash settlement of redemption requests for the preferred OP Units, subject to limited exceptions. Accordingly, we have excluded these securities from earnings per share and unit computations for the periods presented above, and we expect to exclude them in future periods.

Note 8 — Business Segments

We have two reportable segments: conventional real estate operations and affordable real estate operations. Our conventional real estate operations consist of market-rate apartment communities with rents paid by the residents and included 143 apartment communities with 41,429 apartment homes at September 30, 2015. Our affordable real estate operations consisted of 56 apartment communities with 8,685 apartment homes at September 30, 2015, with rents that are generally paid, in whole or part, by a government agency.

Due to the diversity of our economic ownership interests in our apartment communities, our chief executive officer, who is our chief operating decision maker, uses proportionate property net operating income to assess the operating performance of our apartment communities. Proportionate property net operating income reflects our share of rental and other property revenues less direct property operating expenses, including real estate taxes, for the consolidated and unconsolidated apartment communities that we own.

The following tables present the revenues, net operating income (loss) and income (loss) from continuing operations of our conventional and affordable real estate operations segments on a proportionate basis (excluding amounts related to apartment communities sold or classified as held for sale) for the three and nine months ended September 30, 2015 and 2014 (in thousands):

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2015:
Rental and other property revenues	$	204,246	$	24,388	$	10,219	$	1,529		$	240,382
Tax credit and asset management revenues	—		—		—		6,005			6,005
Total revenues	204,246		24,388		10,219		7,534			246,387
Property operating expenses	68,456		9,631		3,434		7,100			88,621
Investment management expenses	—		—		—		1,905			1,905
Depreciation and amortization	—		—		—		77,237			77,237
General and administrative expenses	—		—		—		11,013			11,013
Other expenses, net	—		—		—		3,590			3,590
Total operating expenses	68,456		9,631		3,434		100,845			182,366
Net operating income (loss)	135,790		14,757		6,785		(93,311		)	64,021
Other items included in continuing operations	—		—		—		(40,252		)	(40,252		)
Income (loss) from continuing operations	$	135,790	$	14,757	$	6,785	$	(133,563	)	$	23,769

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	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2014:
Rental and other property revenues	$	187,063	$	23,724	$	7,337	$	21,749		$	239,873
Tax credit and asset management revenues	—		—		—		6,970			6,970
Total revenues	187,063		23,724		7,337		28,719			246,843
Property operating expenses	63,869		9,274		2,422		19,675			95,240
Investment management expenses	—		—		—		1,279			1,279
Depreciation and amortization	—		—		—		69,437			69,437
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		10,658			10,658
Other expenses, net	—		—		—		1,349			1,349
Total operating expenses	63,869		9,274		2,422		103,811			179,376
Net operating income (loss)	123,194		14,450		4,915		(75,092		)	67,467
Other items included in continuing operations	—		—		—		(49,281		)	(49,281		)
Income (loss) from continuing operations	$	123,194	$	14,450	$	4,915	$	(124,373	)	$	18,186

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2015:
Rental and other property revenues	$	599,977	$	72,779	$	28,269	$	16,283		$	717,308
Asset management and tax credit revenues	—		—		—		18,127			18,127
Total revenues	599,977		72,779		28,269		34,410			735,435
Property operating expenses	200,660		28,965		10,274		32,144			272,043
Investment management expenses	—		—		—		4,594			4,594
Depreciation and amortization	—		—		—		226,819			226,819
General and administrative expenses	—		—		—		33,727			33,727
Other expenses, net	—		—		—		7,521			7,521
Total operating expenses	200,660		28,965		10,274		304,805			544,704
Net operating income (loss)	399,317		43,814		17,995		(270,395		)	190,731
Other items included in continuing operations	—		—		—		(124,598		)	(124,598		)
Income (loss) from continuing operations	$	399,317	$	43,814	$	17,995	$	(394,993	)	$	66,133

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	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2014:
Rental and other property revenues	$	546,381	$	70,717	$	21,704	$	80,699		$	719,501
Asset management and tax credit revenues	—		—		—		22,684			22,684
Total revenues	546,381		70,717		21,704		103,383			742,185
Property operating expenses	187,881		29,129		6,820		65,178			289,008
Investment management expenses	—		—		—		3,552			3,552
Depreciation and amortization	—		—		—		211,143			211,143
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		31,304			31,304
Other expenses, net	—		—		—		7,223			7,223
Total operating expenses	187,881		29,129		6,820		319,813			543,643
Net operating income (loss)	358,500		41,588		14,884		(216,430		)	198,542
Other items included in continuing operations	—		—		—		(150,373		)	(150,373		)
Income (loss) from continuing operations	$	358,500	$	41,588	$	14,884	$	(366,803	)	$	48,169

(1) Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the results of our consolidated apartment communities and the results of consolidated apartment communities that we do not manage, which are excluded from our measurement of segment performance but included in the related consolidated amounts, and our share of the results of operations of our unconsolidated real estate partnerships that we manage, which are included in our measurement of segment performance but excluded from the related consolidated amounts.

(2) Our basis for assessing segment performance excludes the results of apartment communities sold or classified as held for sale. In the segment presentation above, the current year and prior year operating results for apartment communities sold or classified as held for sale during 2015 or 2014 are presented within the Corporate and Amounts Not Allocated to Segments column. Proportionate property net operating income, our key measurement of segment profit or loss, also excludes property management expenses and casualty gains and losses (which are included in property operating expenses) and depreciation and amortization. Accordingly, we do not allocate these amounts to our segments and they are presented within the Corporate and Amounts Not Allocated to Segments column.

For the nine months ended September 30, 2015 and 2014, capital additions related to our conventional segment totaled $258.7 million and $270.4 million, respectively, and capital additions related to our affordable segment totaled $6.5 million and $6.6 million, respectively.

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

Forward Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements in certain circumstances. Certain information included in this report contains or may contain information that is forward-looking, within the meaning of the Federal securities laws, including, without limitation, statements regarding: our ability to maintain current or meet projected occupancy, rental rates and property operating results; the effect of acquisitions, dispositions, developments and redevelopments; our ability to meet budgeted costs and timelines, and achieve budgeted rental rates related to our development and redevelopment investments; expectations regarding sales of our apartment communities and the use of proceeds thereof; and our ability to comply with debt covenants, including financial coverage ratios.

Actual results may differ materially from those described in these forward-looking statements and, in addition, may be affected by a variety of risks and factors, some of which are beyond our control, including, without limitation: real estate risks, including fluctuations in real estate values and the general economic climate in the markets in which we operate and competition for residents in such markets; the timing of acquisitions, dispositions, redevelopments and developments; financing risks, including the availability and cost of financing and the risk that our cash flows from operations may be insufficient to meet required payments of principal and interest; the risk that our earnings may not be sufficient to maintain compliance with debt covenants; national and local economic conditions, including the pace of job growth and the level of unemployment; the terms of governmental regulations that affect us and interpretations of those regulations; the competitive environment in which we operate; insurance risk, including the cost of insurance; natural disasters and severe weather such as hurricanes; litigation, including costs associated with prosecuting or defending claims and any adverse outcomes; energy costs; and possible environmental liabilities, including costs, fines or penalties that may be incurred due to necessary remediation of contamination of apartment communities presently or previously owned by us. In addition, our current and continuing qualification as a real estate investment trust involves the application of highly technical and complex provisions of the Internal Revenue Code and depends on our ability to meet the various requirements imposed by the Internal Revenue Code, through actual operating results, distribution levels and diversity of stock ownership.

Readers should carefully review our financial statements and the notes thereto, as well as the section entitled “Risk Factors” described in Item 1A of Apartment Investment and Management Company’s and AIMCO Properties, L.P.’s combined Annual Report on Form 10-K for the year ended December 31, 2014, and the other documents we file from time to time with the Securities and Exchange Commission. As used herein and except as the context otherwise requires, “we,” “our” and “us” refer to Apartment Investment and Management Company (which we refer to as Aimco), AIMCO Properties, L.P. (which we refer to as the Aimco Operating Partnership) and their consolidated entities, collectively.

Executive Overview

Aimco and the Aimco Operating Partnership are focused on the ownership, management and redevelopment of quality apartment communities located in the largest coastal and job growth markets in the United States. Our business activities are defined by a commitment to our core values of integrity, respect, collaboration, a focus on our customers and a performance culture. These values and our corporate mission, to consistently provide quality apartment homes in a respectful environment delivered by a team of people who care, shape our culture. In all our interactions with residents, team members, business partners, lenders and equity holders, we aim to be the best owner and operator of apartment communities and an outstanding corporate citizen.

Our principal financial objective is to provide predictable and attractive returns to our equity holders, as measured by growth in our Net Asset Value and Adjusted Funds From Operations (each defined under the Key Financial Indicators heading below). Our business plan to achieve this objective is to:

• operate our portfolio of desirable apartment homes with valued amenities, with a high level of focus on customer satisfaction and in an efficient manner that realizes the benefits of our corporate systems and local management expertise;

• improve our geographically diversified portfolio of apartment communities, which average “B/B+” in quality (defined under the Portfolio Management heading below) by selling lower rated apartment communities and investing the proceeds from such sales through property upgrades, capital improvements, redevelopment, development and acquisition of higher-quality apartment communities;

• provide financial leverage primarily by the use of non-recourse, long-dated, fixed-rate property debt and perpetual preferred equity, a combination which helps to limit our refunding and re-pricing risk and which provides a hedge against increases in interest rates; and

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• emphasize a collaborative, respectful, and performance-oriented culture while maintaining high morale and team engagement.

Our long-standing business strategy is organized around our core activities of property operations, portfolio management, redevelopment and development, balance sheet and liquidity, and culture. Our business strategies are described in more detail below.

Property Operations

We own and operate a diversified portfolio of market-rate apartment communities, which we refer to as conventional apartment communities. At September 30, 2015, our conventional portfolio included 143 apartment communities with 41,429 apartment homes in which we held an average ownership of approximately 98%. We also operate a portfolio of affordable apartment communities, which consists of apartments with rents that are generally paid, in whole or part, by a government agency. At September 30, 2015, our affordable portfolio consisted of 56 apartment communities with 8,685 apartment homes in which we held an average ownership of approximately 95%. Our conventional and affordable portfolios comprise our reportable segments and generated 90% and 10%, respectively, of our proportionate property net operating income (defined below under the Results of Operations – Real Estate Operations heading) during the nine months ended September 30, 2015.

Our property operations strategy creates value through the delivery of superior customer satisfaction and expense management.  We utilize customer surveys, from a prospective resident’s first contact with us to the time a resident moves out, to drive higher levels of customer satisfaction, which lead to higher renewal rates, lower turn costs and decreased vacancy. Our focus on expense management has led to approximately 7% expense growth for our Conventional Same Store portfolio from 2007 through 2015, approximately 5% below the growth of the cumulative consumer price index during that time.  Part of our expense management strategy involves the selective centralization of property functions, which frees our site teams to spend more time on sales and the delivery of customer service.  We have also strategically refocused our spending from 2007 through 2015, including spending approximately $7 million more annually in community maintenance and centralized services and systems for our Conventional Same Store portfolio, while reducing our annual spending on operations personnel, vendor services, marketing and turnover costs by $16 million.  We also make capital investment decisions to create value in our properties while reducing costs.  For example, by replacing carpeting in most of the apartment homes in our Conventional Same Store portfolio with plank flooring, we have reduced annual carpet replacement and cleaning costs, while driving higher average revenues per home.

Portfolio Management

Our portfolio strategy seeks predictable rent growth from a portfolio of “A,” “B” and “C+” quality market-rate apartment communities, averaging “B/B+” in quality, and diversified among the largest coastal and job growth markets in the United States, as measured by total apartment value. We measure conventional apartment community quality based on average rents of our apartment homes compared to local market average rents as reported by a third-party provider of commercial real estate performance and analysis. Under this rating system, we classify as “A” quality apartment communities those earning rents greater than 125% of the local market average, as “B” quality apartment communities those earning rents between 90% and 125% of the local market average; “C+” quality assets are those with rents greater than $1,100 per month, but lower than 90% of the local market average; and “C” quality assets are those with rents less than $1,100 per month and lower than 90% of the local market average. We classify as “B/B+” quality a portfolio that on average earns rents between 100% and 125% of the local market average rents where the portfolio is located. Although some companies and analysts within the multifamily real estate industry use apartment community class ratings of “A,” “B” and “C,” some of which are tied to local market rent averages, the metrics used to classify apartment community quality as well as the timing for which local markets rents are calculated may vary from company to company. Accordingly, our rating system for measuring apartment community quality is neither broadly nor consistently used in the multifamily real estate industry.

Our portfolio strategy is to sell each year the 5% to 10% of our portfolio with lower projected returns, lower operating margins, and lower expected future rent growth, and reinvest the sale proceeds in apartment communities already in our portfolio, through property upgrades, capital improvements and redevelopment, or through the purchase of other apartment communities and, in limited situations, the development of apartment communities. We execute our strategy through leverage neutral paired trades when the investment will yield risk-adjusted returns in excess of those of the apartment community sold and when portfolio quality is enhanced. Whenever possible, we structure transactions in a tax-efficient manner to preserve our invested capital. Through this disciplined approach to capital recycling, we have significantly increased the quality of our portfolio. From December 31, 2011 to September 30, 2015, we:

• Increased our period-end conventional portfolio average revenue per apartment home by 43% to $1,810. This rate of growth reflects the impact of market rent growth, and more significantly, the impact of portfolio management through dispositions, redevelopment and acquisitions;

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• Increased our conventional portfolio FCF margin by 15% through the sale of lower-rent communities and reinvestment in higher-rent communities; and

• Increased to 89% the percentage of our conventional property net operating income earned in our target markets.

As a result of these efforts, as of June 30, 2015, the most recent period for which market information is available, approximately 50%, 33% and 17% of our portfolio is represented by “A,” “B” and “C+” quality apartment homes.

As we execute our portfolio strategy, we expect to increase conventional portfolio average revenue per apartment home at a rate greater than market rent growth; to increase FCF margins; and to increase to 95% or more the percentage of our conventional property net operating income earned in our target markets.

In addition to improving our portfolio through the capital expenditures discussed below under the Liquidity and Capital Resources heading, during the nine months ended September 30, 2015, we upgraded our portfolio through the acquisition of three apartment communities.

In March, we acquired for $38.3 million Mezzo, a 94-apartment home community located in Atlanta, Georgia. This community has 2,800 square feet of commercial space. Stabilized revenues per apartment home are expected to average $3,600, making this an “A” quality asset for us.

In April, we acquired for $63.0 million, Axiom Apartment Homes, located near Kendall Square in Cambridge, Massachusetts. We began leasing the newly constructed six-story building during the second quarter, which includes 115 apartment homes and 3,800 square feet of retail space. At September 30, 2015, 77% of the apartment homes were occupied. Upon stabilization, revenues per apartment home are expected to average $3,550, making this an “A” quality asset.

In June, we acquired Vivo (previously known as 270 on Third), an eight-story, 91-apartment home community currently under construction near Kendall Square in Cambridge, Massachusetts. Vivo is located two blocks from Axiom Apartment Homes and is contiguous to a large life science complex now under construction, the completion of which is planned for late spring or early summer 2016. Upon completion in the fourth quarter of 2015, Vivo will also contain more than 8,000 square feet of retail space. At closing, we paid $27.9 million and agreed to fund the remaining construction costs. We expect a total investment of $45.0 million in this community, of which $38.8 million has been invested through September 30, 2015. We obtained the certificate of occupancy for this community on September 25, 2015 and took possession of the building on October 1, 2015. Upon stabilization, revenues per apartment home are expected to average $3,865, making this an "A" quality asset.

Consistent with our paired trade discipline, we funded these acquisitions using a portion of the proceeds from our sale of eight apartment communities with 2,891 apartment homes and with average monthly revenues per apartment home of $1,002.

In addition to the acquisitions of these three properties, during the third quarter, we entered into a contract to acquire an apartment community currently under construction in Northern California for $320 million.  Closing of the acquisition is expected to occur upon completion of construction in the summer of 2016. Consistent with our paired-trade discipline, we intend to fund the acquisition on a leverage neutral basis through a ten-year property loan, with the balance funded primarily by proceeds from sales of lower-rated apartment communities. After lease-up and assuming current market rents, we expect revenues per apartment home for this acquisition to average $3,800 per month.

Redevelopment and Development

We invest in the redevelopment of certain apartment communities in superior locations, when we believe the investment will yield risk-adjusted returns in excess of those from apartment communities sold in paired trades or in excess of the cost of equity issued to fund the equity component of the redevelopments. We have historically undertaken a range of redevelopment projects: from those in which buildings or exteriors are renovated without the need to vacate apartment homes; to those in which significant renovation of apartment homes may be accomplished upon lease expiration and turnover; and to those in which an entire building or community is wholly vacated. We execute certain of our redevelopment projects using a phased approach, where we renovate portions of an apartment community in stages, which allows additional flexibility in our exposure to project costs and the ability to tailor our product offerings to customer response and rent achievement. Redevelopment work may also include seeking entitlements from local governments, which enhance the value of our existing portfolio by increasing density, that is, the right to add apartment homes to a site.

During the nine months ended September 30, 2015, we invested $98.0 million in our redevelopment projects, and we completed construction at three redevelopment projects. Lincoln Place, in Venice, California, and The Preserve at Marin, in Corte Madera, California, were completed in the first quarter and, as of September 30, 2015, were 96% and 97% occupied, respectively.2900 on First in Seattle, Washington, was completed during the second quarter and, as of September 30, 2015, was 89% occupied.

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During the second quarter, we approved a plan to continue redevelopment of The Sterling, located in Center City Philadelphia. Since 2014, we have completed the redevelopment of approximately one-third of the apartment homes as planned, at a cost consistent with underwriting, and at rents in excess of our underwriting. These results led to our decision in the second quarter to redevelop an additional five floors with 103 apartment homes for an additional investment of approximately $13.5 million.

During the third quarter, we approved a plan for redevelopment of a second tower at Park Towne Place, also located in Center City Philadelphia. Since 2014, we have completed as planned, and at a cost consistent with underwriting, the redevelopment of 179, or 78%, of the apartment homes in one of the four towers that comprise the community. Of the completed apartment homes, 128, or 72%, are leased at rents in excess of our underwriting. We anticipate completing during the fourth quarter of 2015 the first phase of the redevelopment, which includes the apartment homes in the first tower, as well as the renovation of the commercial space, common areas and amenities. Our results on the first phase of redevelopment led to our decision to redevelop a second tower containing 251 apartment homes for an additional net investment of approximately $37 million. During construction, we expect to combine some apartment homes in this building so that the tower, at completion, will include 245 apartment homes. In order to facilitate the extensive construction activity, we began de-leasing the second tower in fourth quarter 2015.

We undertake ground-up development, either directly in connection with the redevelopment of an existing apartment community or, on a more limited basis, at a new location with a third party development partner with expertise in the local market. During the nine months ended September 30, 2015, we invested $80.4 million in development projects, including $69.5 million in One Canal Street in the historic Bullfinch Triangle neighborhood of Boston's West End, and $10.9 million in Vivo, the Cambridge, Massachusetts apartment community that was under construction at the time of its acquisition in the second quarter. Construction of the apartment homes was completed during the third quarter, and we began lease-up in October. Construction of the community’s amenities is expected to be complete by year’s end.

See below under the Liquidity and Capital Resources – Redevelopment and Development heading for additional information regarding our ongoing redevelopment and development projects during the nine months ended September 30, 2015.

Balance Sheet and Liquidity

Our leverage strategy seeks to increase financial returns while using leverage with appropriate caution. We target the ratio of Debt and Preferred Equity to Adjusted EBITDA to be below 7.0x and we target the ratio of Adjusted EBITDA to Adjusted Interest and Preferred Dividends to be greater than 2.5x. We also track the ratios of Proportionate Debt to Adjusted EBITDA and Adjusted EBITDA to Adjusted Interest.

Proportionate Debt, Adjusted EBITDA and Adjusted Interest, as used in these ratios, are non-GAAP financial measures, which are further discussed and reconciled under the Non-GAAP Performance and Liquidity Measures - Leverage Ratios heading. Preferred Equity represents Aimco's preferred stock and the Aimco Operating Partnership's preferred OP Units.

Our leverage ratios for the trailing twelve month periods ended September 30, 2015 and 2014, are presented below:

	Trailing Twelve Months Ended September 30,
	2015	2014
Proportionate Debt to Adjusted EBITDA	6.6x	6.6x
Proportionate Debt plus Preferred Equity to Adjusted EBITDA	7.1x	7.1x
Adjusted EBITDA to Adjusted Interest	3.0x	2.7x
Adjusted EBITDA to Adjusted Interest and Preferred Dividends	2.7x	2.6x

From 2011 to September 30, 2015, we reduced our ratio Proportionate Debt plus Preferred Equity to Adjusted EBITDA by 2.9x, from 10.0x to 7.1x, and we increased our ratio of Adjusted EBITDA to Interest and Preferred Dividends by 0.9x, from 1.8x to 2.7x. We achieved these leverage reductions by paying down property debt, reducing the amount of preferred securities outstanding, increasing our common equity, and through EBITDA growth.

We expect future leverage reduction from earnings growth, especially as apartment communities now being redeveloped or developed are completed and leased, and from regularly scheduled property debt amortization repaid from retained earnings. We also expect to increase our financial flexibility by expanding our pool of unencumbered apartment communities. As of September 30, 2015, this pool included 24 consolidated apartment communities with an estimated fair value of approximately $1.5 billion.

Two credit rating agencies rate our creditworthiness, using different methodologies and ratios for assessing our credit. In addition to lowering the cost of borrowings under our line of credit, an investment grade rating from the rating agencies may lower

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the cost of any future preferred equity issuance, provide additional flexibility for sources of capital, and provide other intangible benefits. Although some of the ratios the rating agencies use are similar to those we use to measure our leverage, there are differences in our methods of calculation and therefore our leverage ratios disclosed above are not indicative of the ratios that may be calculated by these agencies.

During the first half of 2015, the two agencies rating us upgraded our credit rating and outlook to BBB- (stable), an investment grade rating. While an investment grade rating provides for readier access to the issuance of corporate debt, we do not anticipate doing so.

At September 30, 2015, approximately 91% of our leverage consisted of property-level, non-recourse, long-dated debt, 3% consisted of borrowings under our revolving credit arrangement and 6% consisted of perpetual preferred equity, a combination which reduces our refunding and re-pricing risk. The weighted average maturity of our property-level debt was 8.3 years, with 0.3% of our unpaid principal balances maturing during the remainder of 2015 and, on average, 6.8% of our unpaid principal balance maturing each year from 2016 through 2018. Approximately 98% of our property-level debt is fixed-rate, which provides a hedge against increases in interest rates, capitalization rates and inflation.

Although our primary sources of leverage are property-level, non-recourse, long-dated, fixed-rate, amortizing debt and perpetual preferred equity, we also have a Senior Secured Credit Agreement with a syndicate of financial institutions, which we refer to as our Credit Agreement. The Credit Agreement provides for $600.0 million of revolving loan commitments, which we use for working capital and other short-term purposes. Borrowings under the Credit Agreement bear interest at a rate set forth on a pricing grid. At September 30, 2015 we had $128.2 million of outstanding borrowings under the Credit Agreement, and we had the capacity to borrow $435.4 million, net of the outstanding borrowings and $36.4 million for undrawn letters of credit backed by the Credit Agreement.

Under the Credit Agreement, we have agreed to Debt Service and Fixed Charge Coverage covenants, as well as other covenants customary for similar revolving credit arrangements. For the twelve month period ended September 30, 2015, our Debt Service and Fixed Charge Coverage ratios were 1.95x and 1.84x, respectively, compared to covenants of 1.50x and 1.40x, respectively, and ratios of 1.81x and 1.74x, respectively, for the twelve month period ended September 30, 2014. We expect to remain in compliance with these covenants during the next 12 months.

Culture

Our culture is the key to our success. Our emphasis on a collaborative, respectful, and performance-oriented culture is what enables the continuing transformation of the Aimco business. In 2015, Aimco was recognized by the Denver Post as a Top Work Place for the third consecutive year.

Key Financial Indicators

The key financial indicators that we use in managing our business and in evaluating our financial condition and operating performance are: Net Asset Value and Adjusted Funds From Operations. In addition to these indicators, we also use Pro forma Funds From Operations; Free Cash Flow, Free Cash Flow internal rate of return, same store property operating results, proportionate property net operating income, financial coverage ratios, and leverage as shown on our balance sheet to evaluate our operating performance and financial condition.

Net Asset Value is the estimated fair value of our assets, net of liabilities, noncontrolling interests and preferred equity. Adjusted Funds From Operations and Pro forma Funds From Operations are defined and further described below under the Funds From Operations and Adjusted Funds From Operations heading, and proportionate property net operating income is defined and further described below under the Results of Operations – Property Operations heading. Free Cash Flow represents net operating income less capital spending required to maintain the condition of an apartment community, and Free Cash Flow internal rate of return represents the rate of return generated by the investment in an apartment community, Free Cash Flow from the apartment community, and the proceeds from its eventual sale, and is a common benchmark used in the real estate industry for relative comparison of real estate valuations.

The key macro-economic factors and non-financial indicators that affect our financial condition and operating performance are: household formations; rates of job growth; single-family and multifamily housing starts; interest rates; and availability and cost of financing.

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Results of Operations

Because our operating results depend primarily on income from our apartment communities, the supply of and demand for apartments influences our operating results. Additionally, the level of expenses required to operate and maintain our apartment communities and the pace and price at which we redevelop, acquire and dispose of our apartment communities affect our operating results.

The following discussion and analysis of the results of our operations and financial condition should be read in conjunction with the accompanying condensed consolidated financial statements in Item 1.

Overview

Highlights of our results of operations for the three months ended September 30, 2015, are summarized below:

• Conventional Same Store revenues and expenses for the three months ended September 30, 2015, increased by 4.3% and 1.9%, respectively, resulting in a 5.4% increase in net operating income as compared to the three months ended September 30, 2014; and

• Average revenue per apartment home for our retained portfolio of Conventional apartment communities increased by 10%, from $1,649 for the three months ended September 30, 2014 to $1,810 for the three months ended September 30, 2015, primarily as a result of Conventional Same Store year-over-year revenue growth of 4.3%, the delivery of new apartment homes at our redevelopment apartment communities, reinvestment of sales proceeds in higher-rent apartment communities through redevelopment and acquisitions, and the sale of conventional apartment communities during 2015 and 2014 with average revenues per home substantially lower than the apartment communities in the retained portfolio.

Three and Nine Months Ended September 30, 2015 compared to September 30, 2014

Net income attributable to Aimco and net income attributable to the Aimco Operating Partnership decreased by $106.1 million and $111.6 million, respectively, during the the three months ended September 30, 2015, as compared to the three months ended September 30, 2014. Net income attributable to Aimco and net income attributable to the Aimco Operating Partnership decreased by $90.9 million and $96.2 million, respectively, during the the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014. The decreases in income for Aimco and the Aimco Operating Partnership were principally due to a decrease in gains on dispositions of real estate.

The following paragraphs discuss this and other items affecting the results of operations of Aimco and the Aimco Operating Partnership in more detail.

Property Operations

As described under the preceding Executive Overview heading, our owned real estate portfolio consists primarily of conventional apartment communities, and we also operate a portfolio of affordable apartment communities. Our conventional and affordable property operations comprise our reportable segments.

In accordance with accounting principles generally accepted in the United States of America, or GAAP, we consolidate certain apartment communities in which we hold less than 100% of the economic interests, with economic interest ranging from as low as 27% to as high as 99.9%, and we do not consolidate other apartment communities in which we hold economic interests ranging from 40% to 67%. Due to the diversity of our economic ownership interests in our apartment communities, our chief operating decision maker emphasizes as a key measurement of segment profit or loss proportionate property net operating income, which represents our share of the property net operating income of the consolidated and unconsolidated apartment communities that we own and manage. Accordingly, the results of operations of our conventional and affordable segments discussed below are presented on a proportionate basis and exclude the results of four conventional apartment communities with 142 apartment homes and nine affordable apartment communities with 779 apartment homes that we do not manage.

We do not include the proportionate net operating income of sold apartment communities, property management revenues, offsite costs associated with property management or casualty-related amounts in our assessment of segment performance. Accordingly, these items are not allocated to our segment results discussed below. Refer to Note 8 in the condensed consolidated financial statements in Item 1 for further discussion regarding our reportable segments, including a reconciliation of these proportionate amounts to consolidated rental and other property revenues and property operating expenses.

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Conventional Real Estate Operations

Our conventional segment consists of apartment communities we classify as Conventional Same Store, Conventional Redevelopment and Development, Conventional Acquisition, and Other Conventional apartment communities. Conventional Same Store apartment communities are those we manage, that have reached and maintained a stabilized occupancy (greater than 90%) during the current year and prior year periods, and that are not expected to be sold within 12 months. Conventional Redevelopment and Development apartment communities are thosecurrently under construction and those previously under construction but that had not yet achieved stabilized operations as of January 1, 2014. Conventional Acquisition apartment communities are those we have acquired since January 1, 2014. Other Conventional apartment communities includes: conventional apartment communities expected to be sold within12 months but that do not yet meet the criteria to be classified as held for sale; apartment communities that have significant rent control restrictions; apartment communities that had not reached and maintained a stabilized level of occupancy as of January 1, 2014, often due to a casualty event; and the operations of properties that are not multifamily, such as fitness centers.

As of September 30, 2015, as defined by our segment performance metrics, our Conventional Same Store, Conventional Redevelopment and Development, Conventional Acquisition and Other Conventional portfolios consisted of 109, 9, 8 and 11 apartment communities with 33,733, 3,308, 1,391 and 2,379 apartment homes, respectively. When comparing the populations as of December 31, 2014 to September 30, 2015, on a net basis, our Conventional Same Store portfolio increased by six apartment communities and decreased by 2,987 apartment homes. This increase consisted of:

• two apartment communities with 83 apartment homes that were reclassified from our Conventional Acquisition portfolio when they reached stabilization following acquisition;

• one apartment community with 488 apartment homes that was reclassified from our Other Conventional portfolio upon maintaining stabilized occupancy following increased vacancy associated with the termination of corporate housing leases; and

• eight New York apartment communities with 230 apartment homes that were reclassified from our Other Conventional portfolio upon determination that the prospective rental rates for these communities are expected to be more comparable to market rental rate growth in that market, independent of government regulation.

These increases were offset by the removal of four apartment communities with 2,566 apartment homes that were sold during the period and one apartment community with 1,222 apartment homes that is expected to be sold within 12 months, but does not yet meet the criteria to be classified as held for sale in accordance with GAAP. Our conventional portfolio results for the three and nine months ended September 30, 2015 and 2014, as presented below, are based on the apartment community populations as of September 30, 2015.

	Three Months Ended September 30,
(in thousands)	2015		2014		$ Change			% Change
Rental and other property revenues:
Conventional Same Store	$	164,863	$	158,102	$	6,761		4.3	%
Conventional Redevelopment and Development	18,379		13,955		4,424			31.7	%
Conventional Acquisition	7,195		1,414		5,781			408.8	%
Other Conventional	13,809		13,592		217			1.6	%
Total	204,246		187,063		17,183			9.2	%
Property operating expenses:
Conventional Same Store	52,740		51,739		1,001			1.9	%
Conventional Redevelopment and Development	6,580		5,579		1,001			17.9	%
Conventional Acquisition	3,064		464		2,600			560.3	%
Other Conventional	6,072		6,087		(15		)	(0.2	)%
Total	68,456		63,869		4,587			7.2	%
Property net operating income:
Conventional Same Store	112,123		106,363		5,760			5.4	%
Conventional Redevelopment and Development	11,799		8,376		3,423			40.9	%
Conventional Acquisition	4,131		950		3,181			334.8	%
Other Conventional	7,737		7,505		232			3.1	%
Total	$	135,790	$	123,194	$	12,596		10.2	%

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For the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, our conventional segment’s proportionate property net operating income increased $12.6 million, or 10.2%.

For the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, Conventional Same Store proportionate property net operating income increased by $5.8 million, or 5.4%. This increase was primarily attributable to a $6.8 million, or 4.3%, increase in rental and other property revenues due to higher average revenues (approximately $73 per effective home), comprised primarily of increases in rental rates, partially offset by a 10 basis point decrease in average daily occupancy. Rental rates on new leases transacted during the three months ended September 30, 2015, were 6.6% higher than expiring lease rates, and renewal rates were 6.0% higher than expiring lease rates. Operating expenses increased by $1 million, or 1.9% , primarily due to increases in real estate taxes, turnover costs and repairs and maintenance, partially offset by a decrease in insurance costs. During the three months ended September 30, 2015, as compared to 2014, controllable operating expenses, which exclude utility costs, real estate taxes and insurance, increased by $0.7 million, or 3.1%.

Our Conventional Redevelopment and Development proportionate property net operating income increased by $3.4 million during the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, primarily due to increases in net operating income associated with the lease-up of apartment homes placed into service following completion of redevelopment activities. From September 30, 2014 to September 30, 2015, we leased approximately 400 apartment homes that were placed into service at our Lincoln Place, The Preserve at Marin and 2900 on First apartment communities. This was partially offset by a reduction in revenue associated with approximately 110 apartment homes taken out of service at our Park Towne Place and The Sterling redevelopments. We also are leasing up the recently redeveloped homes at Ocean House on Prospect, whereas such homes were substantially leased during the comparative period in 2014.

Our Conventional Acquisitions proportionate property net operating income increased by $3.2 million during the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, due to apartment communities we acquired during 2014 and 2015.

Our Other Conventional proportionate property net operating income increased by $0.2 million during the three months ended September 30, 2015, as compared to the three months ended September 30, 2014. The increase was primarily driven by increased occupancy and lower bad debts at one of our New York communities following the eviction of a commercial tenant and subsequent lease up of the space.

	Nine Months Ended September 30,
(in thousands)	2015		2014		$ Change		% Change
Rental and other property revenues:
Conventional Same Store	$	489,013	$	467,821	$	21,192	4.5	%
Conventional Redevelopment and Development	50,350		36,819		13,531		36.8	%
Conventional Acquisition	19,060		1,710		17,350		1,014.6	%
Other Conventional	41,554		40,031		1,523		3.8	%
Total	599,977		546,381		53,596		9.8	%
Property operating expenses:
Conventional Same Store	156,206		154,075		2,131		1.4	%
Conventional Redevelopment and Development	18,266		15,356		2,910		19.0	%
Conventional Acquisition	7,948		624		7,324		1,173.7	%
Other Conventional	18,240		17,826		414		2.3	%
Total	200,660		187,881		12,779		6.8	%
Property net operating income:
Conventional Same Store	332,807		313,746		19,061		6.1	%
Conventional Redevelopment and Development	32,084		21,463		10,621		49.5	%
Conventional Acquisition	11,112		1,086		10,026		923.2	%
Other Conventional	23,314		22,205		1,109		5.0	%
Total	$	399,317	$	358,500	$	40,817	11.4	%

For the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, our conventional segment’s proportionate property net operating income increased $40.8 million, or 11.4%.

For the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, Conventional Same Store proportionate property net operating income increased by $19.1 million, or 6.1%. This increase was primarily

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attributable to a $21.2 million, or 4.5%, increase in rental and other property revenues due to higher average revenues (approximately$74 per effective home), comprised primarily of increases in rental rates. Rental rates on new leases transacted during the nine months ended September 30, 2015, were 5.0% higher than expiring lease rates, and renewal rates were 5.5% higher than expiring lease rates. The increase in Conventional Same Store rental and other property revenues was partially offset by a $2.1 million, or 1.4%, increase in property operating expenses, primarily due to increases in real estate taxes, repairs and maintenance, turnover costs and utility costs, partially offset by decreases in insurance and marketing costs. During the nine months ended September 30, 2015, as compared to 2014, controllable operating expenses, which exclude utility costs, real estate taxes and insurance, increased by $1.2 million, or 1.7%.

Our Conventional Redevelopment and Development proportionate property net operating income increased by $10.6 million during the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, primarily due to increases in net operating income associated with the lease-up of apartment homes placed into service following completion of redevelopment activities. From September 30, 2014 to September 30, 2015, we leased approximately 400 apartment homes that were placed into service at our Lincoln Place, The Preserve at Marin and 2900 on First apartment communities. This was partially offset by a reduction in revenue associated with approximately 110 apartment homes taken out of service at our Park Towne Place and The Sterling redevelopments. We also are leasing up the recently redeveloped homes at Ocean House on Prospect, whereas such homes were substantially leased during the comparative period in 2014.

Our Conventional Acquisitions proportionate property net operating income increased by $10.0 million during the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, due to apartment communities we acquired during 2014 and 2015.

Our Other Conventional proportionate property net operating income increased by $1.1 million during the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014. The increase was primarily driven by increased occupancy and lower bad debts at one of our New York communities following the eviction of a commercial tenant and subsequent lease up of the space.

Affordable Real Estate Operations

Our affordable segment consists of apartment communities we classify as Affordable Same Store or Other Affordable. Affordable Same Store apartment communities are those we manage that are subject to tax credit agreements and that have reached and maintained a stabilized occupancy (greater than 90%) during the current year and prior year-to-date periods. Other Affordable apartment communities are those that do not meet the Affordable Same Store apartment community definition.

At September 30, 2015, as defined by our segment performance metrics, our Affordable Same Store portfolio and Other Affordable portfolio consisted of 45 and two apartment communities with 7,311 and 595 apartment homes, respectively. From December 31, 2014 to September 30, 2015, on a net basis, our Affordable Same Store portfolio increased by one apartment community with 200 apartment homes that was reclassified to our Affordable Same Store portfolio upon maintaining a stabilized level of occupancy following a casualty event. Our affordable results for the three and nine months ended September 30, 2015 and 2014, presented below are based on the apartment community populations at September 30, 2015.

	Three Months Ended September 30,
(in thousands)	2015		2014		$ Change		% Change
Rental and other property revenues:
Affordable Same Store	$	22,078	$	21,728	$	350	1.6	%
Other Affordable	2,310		1,996		314		15.7	%
Total	24,388		23,724		664		2.8	%
Property operating expenses:
Affordable Same Store	8,765		8,589		176		2.0	%
Other Affordable	866		685		181		26.4	%
Total	9,631		9,274		357		3.8	%
Property net operating income:
Affordable Same Store	13,313		13,139		174		1.3	%
Other Affordable	1,444		1,311		133		10.1	%
Total	$	14,757	$	14,450	$	307	2.1	%

For the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, our affordable segment’s proportionate property net operating income increased by $0.3 million, or 2.1%. The increase was partly attributed to

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an increase in rental income driven by higher rental rates and increases in commercial income. The increase in revenues was partially offset by an increase in property operating expenses, including increases in utility costs and turnover costs, offset by a decrease in insurance expense.

	Nine Months Ended September 30,
(in thousands)	2015		2014		$ Change			% Change
Rental and other property revenues:
Affordable Same Store	$	65,998	$	64,717	$	1,281		2.0	%
Other Affordable	6,781		6,000		781			13.0	%
Total	72,779		70,717		2,062			2.9	%
Property operating expenses:
Affordable Same Store	26,339		26,524		(185		)	(0.7	)%
Other Affordable	2,626		2,605		21			0.8	%
Total	28,965		29,129		(164		)	(0.6	)%
Property net operating income:
Affordable Same Store	39,659		38,193		1,466			3.8	%
Other Affordable	4,155		3,395		760			22.4	%
Total	$	43,814	$	41,588	$	2,226		5.4	%

For the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, our affordable segment’s proportionate property net operating income increased by $2.2 million, or 5.4%. The increase was primarily attributed to an increase in rental income driven by higher rental rates and increases in commercial income. Affordable proportionate property net operating income also increased due to reductions in insurance expense and personnel costs, partially offset by increases in real estate taxes and utility costs.

Non-Segment Real Estate Operations

Real estate operations net operating income amounts not attributed to our conventional or affordable segments also include property management revenues, offsite costs associated with property management, and casualty losses, reported in consolidated amounts, which we do not allocate to our conventional or affordable segments for purposes of evaluating segment performance (see Note 8 to the condensed consolidated financial statements in Item 1).

For the three months ended September 30, 2015 and 2014, property management expenses, which includes offsite costs associated with managing apartment communities we own (both our share and the share that we allocate to the limited partners in our consolidated partnerships), totaled $5.8 million and $6.2 million, respectively. For the nine months ended September 30, 2015and 2014, property management expenses totaled $17.9 million and $18.5 million, respectively. The decreases in property management expenses are primarily due to a decrease in the number of apartment communities we own and manage.

For the three months ended September 30, 2015 and 2014, casualty losses totaled $0.8 million and $2.6 million, respectively. Casualty losses were higher during 2014 primarily due to casualty losses from a severe hailstorm at one of our apartment communities in 2014, as well as decreases in minor casualty losses at our apartment communities in 2015 as compared to 2014.

During the nine months ended September 30, 2015 and 2014, casualty losses totaled $6.4 million and $9.5 million, respectively. Casualty losses during the nine months ended September 30, 2015, included casualty losses and snow removal costs associated with the severe snow storms in the Northeast, and casualty losses during the nine months ended September 30, 2014, primarily related to the hailstorm discussed above, as well as the severe weather associated with the 2014 “Polar Vortex,” which affected many of our apartment communities in the Northeast and Midwest.

Tax Credit and Asset Management Revenues

We sponsor certain consolidated partnerships that acquire, develop and operate qualifying affordable housing apartment communities and are structured to provide for the pass-through of tax credits and deductions to their partners. We recognize income associated with the delivery of tax credits associated with these partnerships to their partners.

For the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, tax credit and asset management revenues decreased by $1.0 million. This decrease was primarily attributable to a decrease in amortization of tax credit income due to delivery of substantially all of the tax credits on various apartment communities during 2014 and 2015.

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For the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, tax credit and asset management revenues decreased by $4.6 million. This decrease was attributable to a decrease in amortization of tax credit income due to delivery of substantially all of the tax credits on various apartment communities during 2014 and 2015, and a decrease in disposition and other transactional fees earned in 2015, as compared to 2014.

Investment Management Expenses

For the three and nine months ended September 30, 2015, compared to the three and nine months ended September 30, 2014, investment management expenses increased by $0.6 million and $1.0 million, respectively, primarily due to an increase in acquisition costs. Investment management expenses also increased for the nine months ended September 30, 2015, due to increases in personnel and related costs.

Provision for Real Estate Impairment Losses

During the three and nine months ended September 30, 2014, we recognized a $1.4 million provision for real estate impairment loss related to an asset classified as held for sale as of September 30, 2014. The impairment loss related to estimated costs to sell, inclusive of a debt prepayment penalty.

Depreciation and Amortization

For the three and nine months ended September 30, 2015, compared to the three and nine months ended September 30, 2014, depreciation and amortization increased $7.8 million, or 11.2%, and $15.7 million, or 7.4%, respectively, primarily due to assets placed in service as we completed apartment homes in our redevelopment projects and assets we acquired in 2014 and 2015, partially offset by decreases associated with apartment communities sold.

General and Administrative Expenses

For the three months ended September 30, 2015, compared to the three months ended September 30, 2014, general and administrative expenses increased $0.4 million, or 3.3%, primarily due to the timing of our recognition of anticipated incentive compensation, partially offset by decreases in personnel costs related to lower headcount and decreases in technology costs. For the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014, general and administrative expense increased $2.4 million, or 7.7%, primarily due to the timing of our recognition of anticipated incentive compensation.

Other Expenses, net

For the three and nine months ended September 30, 2015, as compared to the three and nine months ended September 30, 2014, other expenses, net increased by $2.2 million and $0.3 million, respectively. The increase in other expense during the three months ended September 30, 2015, was primarily attributed to increases in legal and related costs, along with our write off of capitalized consulting costs related to a software project we elected not to pursue.

The increase in other expense during the nine months ended September 30, 2015, was attributed to the items described above as well as higher environmental costs associated with an apartment community we no longer own, substantially offset by the favorable resolution of certain legal matters.

Interest Expense

For the three and nine months ended September 30, 2015, compared to the three and nine months ended September 30, 2014, interest expense, which includes the amortization of deferred financing costs, decreased by $9.5 million, or 16.5%, and $17.2 million, or 10.2%, respectively. The decrease was primarily the result of lower average outstanding balances on non-recourse property debt for our existing apartment communities, decreases in property debt resulting from apartment community dispositions and higher prepayment penalties incurred in 2014. These decreases in interest expense were partially offset by increases related to our acquisition of apartment communities and on three of our redevelopment projects which reached completion of construction and ceased capitalization of related interest expense.

Other, net

Other, net includes gains or losses on disposition of interests in unconsolidated real estate partnerships, our equity in the income or loss of unconsolidated real estate partnerships, and the results of operations related to our legacy asset management business, which we account for under the profit sharing method, as further discussed in Note 4 to the condensed consolidated financial statements in Item 1.

During the three months ended September 30, 2015 and 2014, other, net primarily consisted of $1.9 million of net losses and $1.5 million of net income, respectively, related to our legacy asset management business. After income taxes and noncontrolling

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interest allocations, our share of the net results of the legacy asset management business totaled $0.4 million of net income for the three months ended September 30, 2015, and $0.1 million of net loss for the three months ended September 30, 2014.

During the nine months ended September 30, 2015 and 2014, other, net primarily consisted of $0.8 million and less than $0.1 million of net income, respectively, related to our legacy asset management business. After income taxes and noncontrolling interest allocations, our share of the net results of the legacy asset management business totaled $3.5 million of net income for the nine months ended September 30, 2015, and and $1.1 million of net loss for the nine months ended September 30, 2014.

Income Tax Benefit

Certain of our operations or a portion thereof, including property, asset and risk management activities, are conducted through TRS entities. Income taxes related to the results of operations of our TRS entities (before gains on dispositions) are included in income tax benefit (expense) in our condensed consolidated statements of operations.

Prior to December 15, 2014, the interests in our tax credit business were owned through TRS entities. On December 15, 2014, our TRS entities sold the interests held in our tax credit business to the Aimco Operating Partnership. Through the date of sale the income resulting from these interests was subject to income taxes.

For the three and nine months ended September 30, 2015, compared to the three and nine months ended September 30, 2014, income tax benefit increased by $3.3 million and $7.9 million, respectively. Income tax benefit increased primarily due to a decrease in income taxes associated with the sale our tax credit business in late 2014.

Gain on Dispositions of Real Estate, Net of Tax

During the three months ended September 30, 2015, we did not sell any consolidated apartment communities. During the three months ended September 30, 2014 , we recognized gains on disposition of real estate of $126.3 million (net of $21.1 million of related income taxes) on our disposal of 15 consolidated apartment communities. During the nine months ended September 30, 2015 and 2014, we recognized gains on disposition of real estate of $130.5 million and $262.5 million (net of $29.8 million of related income taxes) on our disposal of 8 and 26 consolidated apartment communities, respectively.

Net operating income, or NOI, capitalization rate and free cash flow, or FCF, capitalization rate are common benchmarks used in the real estate industry for relative comparison of real estate valuations, including for apartment community sales. For apartment communities sold, we calculate NOI capitalization rates using an apartment community’s trailing twelve month NOI prior to sale, less a management fee equal to 3% of revenue, divided by gross proceeds. For apartment communities sold, we calculate FCF as an apartment community’s trailing twelve month NOI less $1,200 of assumed capital spending per apartment home required to maintain the condition of the apartment community, and we calculate the FCF capitalization rate by dividing the apartment community's FCF by the gross proceeds from its sale. The NOI capitalization rates and FCF capitalization rates for our consolidated conventional and affordable apartment community sales during the three and nine months ended September 30, 2015 and 2014, were as follows:

	Three Months Ended September 30,			Nine Months Ended September 30,
	2015	2014		2015		2014
NOI capitalization rate:
Conventional	n/a	6.7	%	6.7	%	6.8	%
Affordable	n/a	n/a		3.8	%	6.7	%
FCF capitalization rate:
Conventional	n/a	5.2	%	5.4	%	5.3	%
Affordable	n/a	n/a		2.7	%	5.5	%

The apartment communities sold during 2015 and 2014 were primarily outside of our target markets or in less desirable locations within our target markets and had average revenues significantly below those of our retained portfolio. Accordingly, we believe the NOI capitalization rates and FCF capitalization rates for these properties are not indicative of those of our retained portfolio.

Noncontrolling Interests in Consolidated Real Estate Partnerships

Noncontrolling interests in consolidated real estate partnerships reflects the results of our consolidated real estate partnerships allocated to the owners who are not affiliated with Aimco. The amounts of income or loss of our consolidated real estate partnerships that we allocate to the owners not affiliated with Aimco includes their share of property management fees, interest on notes and other amounts that we charge to these partnerships.

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For the three months ended September 30, 2015 and 2014, we allocated net losses of $0.8 million, compared to net income of $8.3 million, respectively, to noncontrolling interests in consolidated real estate partnerships, or a variance of $9.1 million. This change was primarily due to a decrease in the amount of gains on dispositions allocated to noncontrolling interests in our consolidated real estate partnerships, as well as a decrease in the amount of income allocated to noncontrolling interests in the legacy asset management business due to the decrease in revenue.

For the nine months ended September 30, 2015 and 2014, we allocated net income of $4.1 million and $22.0 million, respectively, to noncontrolling interests in consolidated real estate partnerships, a decrease of $17.9 million. The amounts of net income allocated to noncontrolling interests decreased primarily due to a decrease in the amount of gains on dispositions allocated to noncontrolling interests in our consolidated real estate partnerships, as well as deferred asset management fees recognized by the legacy asset management business during the nine months ended September 30, 2015.

Noncontrolling Interests in Aimco Operating Partnership

In Aimco’s consolidated financial statements, noncontrolling interests in the Aimco Operating Partnership reflects the results of the Aimco Operating Partnership that are allocated to the holders of OP Units. The amount of the Aimco Operating Partnership’s income allocated to holders of preferred OP Units is equal to the amount of distributions they receive, which totaled $1.7 million, and $1.6 million, respectively, during three months ended September 30, 2015 and 2014, and $5.2 million and $4.8 million, respectively, for the nine months ended September 30, 2015 and 2014.

Aimco allocates the Aimco Operating Partnership’s income or loss to the holders of common OP Units and equivalents based on the weighted average number of these units (including those held by Aimco) outstanding during the period. For the three months ended September 30, 2015 and 2014, net income allocated to common noncontrolling interests in the Aimco Operating Partnership totaled $0.9 million and $6.5 million, respectively, a decrease in their share of income of $5.7 million. For the nine months ended September 30, 2015and 2014, net income allocated to common noncontrolling interests in the Aimco Operating Partnership totaled $8.3 million and $13.9 million, respectively, a decrease in their share of income of $5.6 million.

Net Income Attributable to Aimco Preferred Stockholders and the Aimco Operating Partnership's Preferred Unitholders

Net income attributable to Aimco Preferred Stockholders and the Aimco Operating Partnership's Preferred Unitholders decreased by $0.1 million and increased by less than $0.1 million, respectively, during the three months ended September 30, 2015, as compared to the three months ended September 30, 2014, and increased by $4.0 million and $4.4 million, respectively, during the nine months ended September 30, 2015, as compared to the nine months ended September 30, 2014. The increases in net income attributable to Aimco Preferred Stockholders and the Aimco Operating Partnership's Preferred Unitholders during the nine months ended September 30, 2015, were primarily due to our issuance during May 2014 of $125.0 million of preferred securities with a 6.875% dividend/distribution rate, and were also partly attributable to the write-off of previously deferred issuance costs in connection with our March 2015 redemption of preferred securities.

Critical Accounting Policies and Estimates

We prepare our consolidated financial statements in accordance with GAAP, which requires us to make estimates and assumptions. We believe that the following critical accounting policies involve our more significant judgments and estimates used in the preparation of our consolidated financial statements.

Impairment of Long-Lived Assets

Real estate and other long-lived assets to be held and used are stated at cost, less accumulated depreciation and amortization, unless the carrying amount of the asset is not recoverable. If events or circumstances indicate that the carrying amount of an apartment community may not be recoverable, we make an assessment of its recoverability by comparing the carrying amount to our estimate of the undiscounted future cash flows, excluding interest charges, of the apartment community. If the carrying amount exceeds the estimated aggregate undiscounted future cash flows, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the apartment community.

From time to time, we have non-revenue producing apartment communities that we hold for future redevelopment. We assess the recoverability of the carrying amount of these redevelopment apartment communities by comparing to the carrying amount our estimate of undiscounted future cash flows based on the expected service potential of the redevelopment apartment community upon completion. In certain instances, we use a probability-weighted approach to determine our estimate of undiscounted future cash flows when alternative courses of action are under consideration.

We currently have several apartment communities in varying stages of significant redevelopment and two apartment communities under development. We assess the recoverability of the carrying amount of these apartment communities by

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comparing our estimate of undiscounted future cash flows based on the expected service potential of the apartment communities upon completion to the carrying amounts.

Our portfolio strategy is to sell each year the lowest-rated 5% to 10% of our portfolio and to reinvest the proceeds from such sales in redevelopment and acquisition of higher-quality apartment communities. As we execute this strategy, we evaluate alternatives to sell or reduce our interest in apartment communities that do not align with our long-term investment strategy, although there is no assurance that we will sell or reduce our investment in such apartment communities during the desired time frame. For any apartment communities that are sold or meet the criteria to be classified as held for sale during the next twelve months, the reduction in the estimated holding period for these apartment communities may result in impairment losses.

Capitalized Costs

We capitalize costs, including certain indirect costs, incurred in connection with our capital additions activities, including redevelopment, development and construction projects, other tangible apartment community improvements and replacements of existing apartment community components. Included in these capitalized costs are payroll costs associated with time spent by site employees in connection with the planning, execution and control of all capital additions activities at the apartment community level. We characterize as “indirect costs” an allocation of certain department costs, including payroll, at the area operations and corporate levels that clearly relate to capital additions activities. We also capitalize interest, property taxes and insurance during periods in which redevelopment, development and construction projects are in progress. We commence capitalization of costs, including certain indirect costs, incurred in connection with our capital addition activities, at the point in time when activities necessary to get apartment communities ready for their intended use are in progress. This includes when apartment communities or apartment homes are undergoing physical construction, as well as when apartment homes are held vacant in advance of planned construction, provided that other activities such as permitting, planning and design are in progress. We cease the capitalization of costs when the assets are substantially complete and ready for their intended use, which is typically when construction has been completed and apartment homes are available for occupancy. We charge to property operating expense, as incurred, costs including ordinary repairs, maintenance and resident turnover costs. Refer to the discussion of investing activities within the Liquidity and Capital Resources section for a summary of costs capitalized during the periods presented.

Non-GAAP Performance and Liquidity Measures

Funds From Operations and Adjusted Funds From Operations

Funds From Operations, or FFO, is a non-GAAP financial measure that we believe, when considered with the financial statements determined in accordance with GAAP, is helpful to investors in understanding our performance because it captures features particular to real estate performance by recognizing that real estate generally appreciates over time or maintains residual value to a much greater extent than do other depreciable assets such as machinery, computers or other personal property. The National Association of Real Estate Investment Trusts, or NAREIT, defines FFO as net income or loss computed in accordance with GAAP, excluding gains from sales of, and impairment losses recognized with respect to, depreciable property, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures. Adjustments for unconsolidated partnerships and joint ventures are calculated on the same basis to determine FFO. We calculate FFO attributable to Aimco common stockholders (diluted) by subtracting, if dilutive, redemption or repurchase related preferred stock issuance costs and dividends on preferred stock, and adding back dividends/distributions on dilutive preferred securities and premiums or discounts on preferred stock redemptions or repurchases.

In addition to FFO, we compute Pro forma FFO and Adjusted FFO, or AFFO, which are also non-GAAP financial measures that we believe are helpful to investors in understanding our performance. Pro forma FFO represents FFO attributable to Aimco common stockholders (diluted), excluding preferred equity redemption-related amounts (adjusted for noncontrolling interests). Preferred equity redemption-related amounts (gains or losses) are items that periodically affect our operating results and we exclude these items from our calculation of Pro forma FFO because such amounts are not representative of our operating performance. AFFO represents Pro forma FFO reduced by Capital Replacements (also adjusted for noncontrolling interests), which represents our estimation of the capital additions required to maintain the value of our portfolio during our ownership period. When we make capital additions at an apartment community, we evaluate whether the additions enhance the value, profitability or useful life of an asset as compared to its condition at the time we purchased the asset. We classify as Capital Improvements those capital additions that meet these criteria and we classify as Capital Replacements those that do not. AFFO is a key financial indicator that we use to evaluate our operational performance, and which helps us determine the amounts of our dividend payments.

FFO, Pro forma FFO and AFFO should not be considered alternatives to net income (loss) or net cash flows from operating activities, as determined in accordance with GAAP, as indications of our performance or as measures of liquidity. Although we use these non-GAAP measures for comparability in assessing our performance against other REITs, not all REITs compute these same measures. Additionally, computation of AFFO is subject to definitions of capital spending, which are subjective. Accordingly, there can be no assurance that our basis for computing these non-GAAP measures is comparable with that of other REITs. For

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the three and nine months ended September 30, 2015 and 2014, Aimco’s FFO, Pro forma FFO and AFFO are calculated as follows (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Net income attributable to Aimco common stockholders (1)	$	19,179		$	124,706		$	169,327		$	263,948
Adjustments:
Depreciation and amortization, net of noncontrolling partners’ interest	75,509			67,531			221,128			205,513
Depreciation and amortization related to non-real estate assets, net of noncontrolling partners’ interest	(2,588		)	(2,439		)	(7,686		)	(7,211		)
Gain on dispositions and other, net of income taxes and noncontrolling partners’ interest	(91		)	(119,807		)	(124,122		)	(242,824		)
Provision for impairment losses related to depreciable real estate assets, including amounts related to unconsolidated entities and net of noncontrolling partners’ interest	—			1,413			656			1,790
Common noncontrolling interests in Aimco Operating Partnership’s share of above adjustments	(3,513		)	2,200			(4,345		)	1,650
Amounts allocable to participating securities	(310		)	188			(381		)	152
FFO Attributable to Aimco common stockholders - Diluted	$	88,186		$	73,792		$	254,577		$	223,018
Preferred redemption related amounts, net of common noncontrolling interests in Aimco Operating Partnership and participating securities	—			—			658			—
Pro forma FFO Attributable to Aimco common stockholders - Diluted	$	88,186		$	73,792		$	255,235		$	223,018
Capital Replacements, net of common noncontrolling interests in Aimco Operating Partnership and participating securities	(13,584		)	(16,325		)	(37,332		)	(39,918		)
AFFO attributable to Aimco common stockholders – Diluted	$	74,602		$	57,467		$	217,903		$	183,100
Weighted average common shares outstanding – diluted (2)	156,008			146,104			155,412			145,924

(1) Represents the numerator for calculating Aimco’s earnings per common share in accordance with GAAP (see Note 7 to the condensed consolidated financial statements in Item 1).

(2) Represents the denominator for Aimco’s earnings per common share – diluted, calculated in accordance with GAAP, plus any additional common share equivalents that are dilutive for FFO, Pro forma FFO, and AFFO.

For the three and nine months ended September 30, 2015, as compared to the three and nine months ended September 30, 2014, Pro forma FFO (on a diluted per share basis) increased 12% and 7%, respectively, due to strong property net operating income growth, increased contribution from redevelopment and acquisition communities, lower interest expense due to lower debt balances and higher income tax benefit. These increases were partially offset by higher other expenses and by the loss of income from apartment communities that were sold during 2014 and 2015. For the nine months ended September 30, 2015, the increases in Pro forma FFO discussed above were also partially offset by higher preferred stock dividends attributable to Aimco's May 2014 offering of its Class A Preferred Stock.

For the same periods, AFFO (on a diluted per share basis) increased 23% and 11%, respectively, as a result of higher Pro forma FFO and lower capital replacements spending during 2015. As we concentrate our investment capital in higher-quality, higher price point apartment communities, our free cash flow margins are increasing and contributing to higher AFFO.

Refer to the Liquidity and Capital Resources section for further information regarding our capital replacements and other capital investing activities.

The Aimco Operating Partnership does not separately compute or report FFO, Pro forma FFO or AFFO. However, based on Aimco’s method for allocation of amounts of FFO, Pro forma FFO and AFFO to noncontrolling interests in the Aimco Operating Partnership, as well as the limited differences between Aimco’s and the Aimco Operating Partnership’s net income amounts during the periods presented, FFO, Pro forma FFO and AFFO amounts on a per unit basis for the Aimco Operating Partnership would be expected to be substantially the same as the corresponding per share amounts for Aimco.

Leverage Ratios

As discussed under the Balance Sheet and Liquidity heading, as part of our leverage strategy, we target the ratio of Debt and Preferred Equity to Adjusted EBITDA to be below 7.0x and we target the ratio of Adjusted EBITDA to Adjusted Interest and

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Preferred Dividends to be greater than 2.5x. We believe the ratios of Proportionate Debt to Adjusted EBITDA and Proportionate Debt plus Preferred Equity to Adjusted EBITDA are important measures as they are commonly used by investors and analysts to assess the relative financial risk associated with balance sheets of companies within the same industry, and they are believed to be similar to measures used by rating agencies to assess entity credit quality.

Proportionate Debt represents our share of the debt obligations recognized in our consolidated financial statements, as well as our share of the debt obligations of our unconsolidated partnerships, reduced by our share of the cash and restricted cash of our consolidated and unconsolidated partnerships, and also by our investment in the subordinate tranches of a securitization that holds certain of our property debt (essentially, our investment in our own non-recourse property loans). We believe Proportionate Debt is useful to investors as it is a measure of our net exposure to debt obligations, assuming the application of cash and restricted cash balances as well as reducing our leverage by our investment in the securitization trust that holds certain of our property debt. Proportionate Debt, as used in our leverage ratios discussed under the Balance Sheet and Liquidity heading, is calculated as set forth in the table below.

Preferred Equity, as used in our leverage ratios, represents the redemption amounts for Aimco’s preferred stock and the Aimco Operating Partnership’s preferred OP Units. Preferred Equity, although perpetual in nature, is another component of our overall leverage.

Adjusted EBITDA is a non-GAAP performance measure. We believe Adjusted EBITDA provides investors relevant and useful information because it allows investors to view income from our operations on an unleveraged basis, before the effects of taxes, depreciation and amortization, gains or losses on sales of and impairment losses related to real estate, and various other items described below that are not necessarily representative of our ability to service our debt obligations or preferred equity requirements.

Adjusted EBITDA represents Aimco’s share of the consolidated amount of our net income, adjusted to exclude the effect of the following items for the reasons set forth below:

• interest, to allow investors to compare a measure of our earnings before the effects of our capital structure and indebtedness with that of other companies in the real estate industry;

• income taxes, to allow investors to measure our performance independent of income taxes, which may vary significantly from other companies within our industry due to leverage and tax planning strategies, among other drivers;

• depreciation and amortization, gains or losses on dispositions and impairment losses related to real estate, for similar reasons to those set forth in our discussion of FFO and AFFO in the preceding section;

• provisions for (or recoveries of) losses on notes receivable, gains on dispositions of non-depreciable assets and non-cash stock-based compensation, as these are items that periodically affect our operations but that are not necessarily representative of our ability to service our debt obligations;

• the interest income earned on our investment in the subordinate tranches of a securitization that holds certain of our property debt, as this income is being generated indirectly from our payments of principal and interest associated with the property debt held by the trust and such amounts will ultimately repay our investment in the trust; and

• EBITDA amounts related to our legacy asset management business, as the debt obligations and associated interest expense for the legacy asset management business as we are not responsible for the operation of this portfolio and associated interest payments are not funded from our operations.

While Adjusted EBITDA is a relevant measure of performance, it does not represent net income as defined by GAAP, and should not be considered as an alternative to net income in evaluating our performance.  Further, our computation of Adjusted EBITDA may not be comparable to similar measures reported by other companies.

Adjusted Interest, as calculated in our leverage ratios, is a non-GAAP measure that we believe is meaningful for investors and analysts as it presents our current recurring interest requirements associated with leverage. Our calculation of Adjusted Interest is set forth in the table below. We exclude from our calculation of Adjusted Interest:

• debt prepayment penalties, which are items that, from time to time, affect our operating results, but are not representative of our scheduled interest obligations; and

• the amortization of deferred financing costs, as these amounts have already been expended in previous periods and are not representative of our current or prospective debt service requirements.

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Our calculation of Adjusted Interest is also reduced by income we receive on our investment in the subordinate tranches of a securitization that holds certain of our property debt, as this income is being generated indirectly from interest associated with the property debt held by the trust.

Preferred Dividends represents the preferred dividends paid on Aimco’s preferred stock and the preferred distributions paid on the Aimco Operating Partnership’s preferred OP Units, exclusive of preferred equity redemption related amounts. We add Preferred Dividends to Adjusted Interest for a more complete picture of the interest and dividend requirements of our leverage, inclusive of perpetual preferred equity.

For the trailing twelve month periods ended September 30, 2015 and 2014, reconciliations of the most closely related GAAP measures to our calculations of Proportionate Debt, Preferred Equity, Adjusted EBITDA, Adjusted Interest and Preferred Dividends, as used in our leverage ratios, are as follows (in thousands):

	September 30,
	2015			2014
Total indebtedness	$	3,935,899		$	3,962,236
Adjustments:
Debt related to assets classified as held for sale	17,311			37,056
Proportionate share adjustments related to debt obligations of consolidated and unconsolidated partnerships	(134,116		)	(118,588		)
Cash and restricted cash	(138,471		)	(195,210		)
Proportionate share adjustments related to cash and restricted cash held by consolidated and unconsolidated partnerships	3,537			3,119
Securitization trust assets	(64,134		)	(60,623		)
Proportionate Debt	$	3,620,026		$	3,627,990
Preferred stock	159,126			186,126
Preferred OP Units	87,937			78,909
Preferred Equity	247,063			265,035
Proportionate Debt plus Preferred Equity	$	3,867,089		$	3,893,025

	Trailing twelve months ended September 30,
	2015			2014
Net income attributable to Aimco Common Stockholders	$	205,599		$	386,071
Adjustments:
Noncontrolling interests in Aimco Operating Partnership's share of net income	17,846			28,636
Preferred stock dividends	11,896			5,787
Interest expense, net of noncontrolling interest	200,035			225,887
Income tax benefit	(30,319		)	(15,378		)
Depreciation and amortization, net of noncontrolling interest	290,790			275,310
Gains on disposition and other, net of income taxes and noncontrolling partners' interests	(146,787		)	(352,203		)
Provision for impairment losses related to depreciable assets and impairment losses related to unconsolidated entities, net of noncontrolling partners' interests	1,194			1,790
Provision for losses on notes receivable	(3		)	(2,342		)
Gains on disposition of non-depreciable assets	(101		)	(412		)
Non-cash stock-based compensation	6,547			5,873
Interest income received on securitization investment	(5,995		)	(5,607		)
EBITDA items related to the legacy asset management business	(5,955		)	(4,155		)
Adjusted EBITDA	$	544,747		$	549,257

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	Trailing twelve months ended September 30,
	2015			2014
Interest expense	$	203,767		$	229,936
Adjustments:
Proportionate share adjustments related to interest of consolidated and unconsolidated partnerships	(5,533		)	(5,382		)
Debt prepayment penalties and other non-interest items	(6,306		)	(12,722		)
Amortization of deferred loan costs	(4,057		)	(3,735		)
Interest income received on securitization investment	(5,995		)	(5,607		)
Adjusted Interest	$	181,876		$	202,490
Preferred stock dividends	11,896			5,787
Preferred stock redemption related amounts	(695		)	—
Preferred OP Unit distributions	6,897			6,413
Preferred Dividends	18,098			12,200
Adjusted Interest and Preferred Dividends	$	199,974		$	214,690

Liquidity and Capital Resources

Liquidity is the ability to meet present and future financial obligations. Our primary source of liquidity is cash flow from our operations. Additional sources are proceeds from sales of apartment communities, proceeds from refinancings of existing property debt, borrowings under new property debt, borrowings under our Credit Agreement and proceeds from equity offerings.

Our principal uses for liquidity include normal operating activities, payments of principal and interest on outstanding property debt, capital expenditures, dividends paid to stockholders, distributions paid to noncontrolling interest partners and acquisitions of, and investments in, apartment communities. We use our cash and cash equivalents and our cash provided by operating activities to meet short-term liquidity needs. In the event that our cash and cash equivalents and cash provided by operating activities are not sufficient to cover our short-term liquidity needs, we have additional means, such as short-term borrowing availability and proceeds from apartment community sales and refinancings. We may use our Credit Agreement for working capital and other short-term purposes, such as funding investments on an interim basis. We expect to meet our long-term liquidity requirements, such as debt maturities and apartment community acquisitions, through long-term borrowings (primarily non-recourse), the issuance of equity securities (including OP Units), the sale of apartment communities and cash generated from operations.

The availability of credit and its related effect on the overall economy may affect our liquidity and future financing activities, both through changes in interest rates and access to financing. Currently, interest rates are low compared to historical levels and many lenders are active in the market. However, any adverse changes in the lending environment could negatively affect our liquidity. We believe we have mitigated much of this exposure by reducing our short and intermediate term maturity risk through refinancing such loans with long-dated, fixed-rate property debt. However, if property financing options become unavailable for our further debt needs, we may consider alternative sources of liquidity, such as reductions in capital spending or proceeds from asset dispositions.

At September 30, 2015, we had $45.2 million in cash and cash equivalents and $93.2 million of restricted cash, an increase in cash and cash equivalents of $16.3 million and an increase in restricted cash of $1.8 million from December 31, 2014. Restricted cash primarily consists of reserves and escrows held by lenders for bond sinking funds, capital additions, property taxes and insurance, and escrows related to tenant security deposits. In addition, we had unfunded commitments by institutional lenders of $48.5 million to fund development costs.

The following discussion relates to changes in cash due to operating, investing and financing activities, which are presented in our condensed consolidated statements of cash flows included in Item 1 of this report.

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Operating Activities

For the nine months ended September 30, 2015, our net cash provided by operating activities of $258.4 million was primarily related to operating income from our consolidated apartment communities, which is affected primarily by rental rates, occupancy levels and operating expenses related to our portfolio of apartment communities, in excess of payments of operating accounts payable and accrued liabilities. Cash provided by operating activities for the nine months ended September 30, 2015, increased by $25.1 million as compared to the nine months ended September 30, 2014, primarily due to improved operating results of our retained portfolio, increased contribution from our redevelopment apartment communities, and a decrease in cash paid for interest, primarily due to lower amounts of debt outstanding. These increases in cash provided by operating activities were partially offset by a decrease in net operating income associated with apartment communities we sold during 2015 and 2014.

Investing Activities

For the nine months ended September 30, 2015, our net cash used in investing activities of $215.7 million consisted primarily of capital expenditures, purchases of real estate and approximately $25.0 million of deposits related to our agreement to acquire an apartment community currently under construction (included in other investing activities within the condensed consolidated statement of cash flows in Item 1), partially offset by proceeds from our disposition of real estate. Capital expenditures totaled $277.6 million and $277.2 million during the nine months ended September 30, 2015 and 2014, respectively. We generally fund capital additions with cash provided by operating activities and cash proceeds from apartment community sales.

We categorize our capital spending broadly into six primary categories:

• capital replacements, which represent capital additions made to replace capital assets consumed during our ownership;

• capital improvements, which are non-redevelopment capital additions that are made to enhance the value, profitability or useful life of an asset from its original purchase condition;

• property upgrades, which may include kitchen and bath remodeling, energy conservation projects, and investments in longer-lived materials designed to reduce turnover costs and maintenance, all of which are generally lesser in scope than redevelopment additions and do not significantly disrupt property operations;

• redevelopment additions, which represent capital additions intended to enhance the value of the apartment community through the ability to generate higher average rental revenues, and may include costs related to entitlement, which enhance the value of a community through increased density, and costs related to renovation of exteriors, common areas or apartment homes;

• development additions, which represent construction and related capitalized costs associated with ground-up development projects; and

• casualty replacements spending, which represent capitalized costs incurred in connection with the restoration of an asset after a casualty event such as a severe snow storm, hurricane, tornado or flood.

We exclude from these measures the amounts of capital spending related to apartment communities sold or classified as held for sale at the end of the period. We have also excluded from these measures indirect capitalized costs which are allocated later in the year to projects, and their related capital spending categories. A summary of the capital spending for these categories, along with a reconciliation of the total for these categories to the capital expenditures reported in the accompanying condensed consolidated statements of cash flow for the nine months ended September 30, 2015 and 2014, are presented below (dollars in thousands):

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	2015		2014
Capital Replacements	$	33,485	$	33,503
Capital Improvements	12,619		19,040
Property Upgrades	34,601		34,909
Redevelopment additions	98,048		147,081
Development additions	80,366		31,814
Casualty replacements	5,244		3,598
Total capital additions	264,363		269,945
Plus: additions related to apartment communities sold or held for sale	790		7,073
Plus: unallocated indirect capitalized costs and additions related to consolidated apartment communities not managed	3,640		—
Consolidated capital additions	268,793		277,018
Plus: net change in accrued capital spending	8,782		196
Capital expenditures per consolidated statement of cash flows	$	277,575	$	277,214

For the nine months ended September 30, 2015 and 2014, we capitalized $8.7 million and $11.3 million of interest costs, respectively, and $21.0 million and $21.9 million of other direct and indirect costs, respectively.

Redevelopment and Development

We invest in the redevelopment of certain apartment communities in superior locations and have undertaken a range of redevelopment projects: from those in which buildings or exteriors are renovated without the need to vacate apartment homes; to those in which significant renovation of apartment homes may be accomplished upon lease expiration and turnover; and to those in which an entire building or community is wholly vacated. We execute certain of our redevelopment projects using a phased approach, where we renovate portions of an apartment community in stages, which allows additional flexibility of project costs and the ability to tailor our product offerings to customer response and rent achievement. In addition, we undertake ground-up development, either directly in connection with the redevelopment of an existing apartment community or, on a more limited basis, at a new location with a third party development partner with expertise in the local market.

During the nine months ended September 30, 2015, our redevelopment activities focused on six apartment communities with $98.0 million of investment, and our development activities focused on two apartment communities with $80.4 million of investment.

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Information regarding our redevelopment and development projects at September 30, 2015, is presented below (dollars in millions):

						Schedule
	Total Number of Apartment Homes at Completion	Estimated Net  Investment at Completion		Inception-to-Date Net Investment		Construction Start	Initial Occupancy	Stabilized Occupancy	Stabilized NOI
Redevelopment
Ocean House on Prospect	53	$	14.8	$	13.7	4Q 2014	3Q 2015	1Q 2016	2Q 2017
Park Towne Place	948	97.0		53.0		Multiple	3Q 2015	1Q 2017	2Q 2018
The Sterling	535	49.5		42.6		Multiple	Multiple	2Q 2016	3Q 2017
Subtotal	1,536	$	161.3	$	109.3
Development
One Canal Street	310	$	190.0	$	132.3	4Q 2013	1Q 2016	2Q 2017	3Q 2018
Vivo	91	45.0		38.8		n/a	4Q 2015	3Q 2016	4Q 2017
Subtotal	401	$	235.0	$	171.1
Total	1,937	$	396.3	$	280.4
Completed Redevelopment
Lincoln Place	795	$	360.0	$	359.0	Multiple	Multiple	2Q 2015	3Q 2016
The Preserve at Marin	126	124.0		123.4		4Q 2012	1Q 2014	3Q 2015	4Q 2016
2900 on First Apartments	135	15.2		14.7		1Q 2014	1Q 2014	2Q 2015	3Q 2016
Total Completed Year to Date	1,056	$	499.2	$	497.1

Stabilized Occupancy represents the period in which we expect the apartment communities being developed or redeveloped to achieve targeted physical occupancy, generally greater than 90%. Stabilized NOI represents the period in which we expect the communities to achieve stabilized rents and operating costs, generally five quarters after Stabilized Occupancy.

During the nine months ended September 30, 2015, we invested $98.0 million in our redevelopment projects, and we completed construction at three redevelopment projects. Lincoln Place, in Venice, California, and The Preserve at Marin, in Corte Madera, California, were completed in the first quarter and, as of September 30, 2015, were 96% and 97% occupied, respectively.2900 on First in Seattle, Washington, was completed during the second quarter and, as of September 30, 2015, was 89% occupied.

During the second quarter, we approved a plan to continue redevelopment of The Sterling, located in Center City Philadelphia. Since 2014, we have completed the redevelopment of approximately one-third of the apartment homes as planned, at a cost consistent with underwriting, and at rents in excess of our underwriting. These results led to our decision in the second quarter to redevelop an additional five floors with 103 apartment homes for an additional investment of approximately $13.5 million.

During the third quarter, we approved a plan for redevelopment of a second tower at Park Towne Place, also located in Center City Philadelphia. Since 2014, we have completed as planned, and at a cost consistent with underwriting, the redevelopment of 179, or 78%, of the apartment homes in one of the four towers that comprise the community. Of the completed apartment homes, 128, or 72%, are leased at rents in excess of our underwriting. We anticipate completing during the fourth quarter of 2015 the first phase of the redevelopment, which includes the apartment homes in the first tower, as well as the renovation of the commercial space, common areas and amenities. Our results on the first phase of redevelopment led to our decision to redevelop a second tower containing 251 apartment homes for an additional net investment of approximately $37 million. During construction, we expect to combine some apartment homes in this building so that the tower, at completion, will include 245 apartment homes. In order to facilitate the extensive construction activity, we began de-leasing the second tower in fourth quarter 2015.

During the nine months ended September 30, 2015, we invested $80.4 million in our development projects. This included an investment of $69.5 million in the development of One Canal Street in the historic Bullfinch Triangle neighborhood of Boston's West End. One Canal Street will include 310 apartment homes and 22,000 square feet of commercial space. Construction was on track at the end of third quarter 2015, and we remain on plan for initial occupancy in the first quarter of 2016. Our investment in One Canal Street has been and will be funded in part by a $114.0 million non-recourse property loan, of which $48.5 million was available to draw at September 30, 2015.

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Our development spending during the nine months ended September 30, 2015, also included $10.9 million at Vivo, the eight-story, 91-apartment home near Kendall Square in Cambridge, Massachusetts, under construction at the time we acquired it during the second quarter. Vivo is located two blocks from Axiom Apartment Homes, which we also acquired during the second quarter, and is contiguous to a large life science complex now under construction, the completion of which is planned for late spring or early summer 2016. At closing, we paid $27.9 million and agreed to fund the remaining construction costs. We expect a total investment of $45.0 million in this community, of which $38.8 million has been invested through September 30, 2015. Construction of the apartment homes was completed during the third quarter, and we began lease-up in October. Construction of the community’s amenities is expected to be complete by year’s end.

We expect our total development and redevelopment spending to range from $225 million to $240 million for the year ending December 31, 2015.

Financing Activities

For the nine months ended September 30, 2015, our net cash used in financing activities of $26.5 million was primarily attributed to principal payments on property loans, net repayments on our revolving credit facility, dividends paid to common security holders, distributions paid to noncontrolling interests and our redemption of preferred securities, partially offset by proceeds from our issuance of common securities and proceeds from property loans used to fund our redevelopment and development projects.

Early in the year, we generated $366.6 million of proceeds from our issuance of common equity, which were primarily used to repay the then outstanding balance under our Credit Agreement, to repay property debt so as to expand our unencumbered asset pool as further discussed below, to redeem preferred securities, and to fund redevelopment and property upgrades that would otherwise have been funded with property debt on a leverage-neutral basis. We also generated $233.0 million of proceeds from property loans, which were used to fund part of our investments in redevelopment and development.

Principal payments on property loans during the period totaled $418.7 million, and included $60.1 million of scheduled principal amortization, $151.0 million related to repayment of property debt to expand our unencumbered asset pool, and the remainder primarily related debt repaid in connection with a refinancing and debt payoffs in connection with dispositions. We like the discipline of financing our investments in real estate through the use of amortizing, fixed rate property debt, as the amortization gradually reduces our leverage, reduces our refunding risk and the fixed-rate provides a hedge against increases in interest rates. Our net cash used in financing activities also includes $191.6 million of payments to equity holders, as further detailed in the table below.

Equity and Partners’ Capital Transactions

The following table presents our dividend and distribution activity during the nine months ended September 30, 2015 (dollars in thousands):

	2015
Cash distributions paid by the Aimco Operating Partnership to holders of noncontrolling interests in consolidated real estate partnerships	$	34,117
Cash distributions paid by the Aimco Operating Partnership to preferred unitholders (1)	13,550
Cash distributions paid by the Aimco Operating Partnership to common unitholders (2)	143,969
Total cash distributions paid by the Aimco Operating Partnership	$	191,636
Cash distributions paid by Aimco to holders of noncontrolling interests in consolidated real estate partnerships	$	34,117
Cash distributions paid by Aimco to holders of common OP Units	11,909
Cash dividends paid by Aimco to preferred stockholders	8,342
Cash dividends paid by Aimco to common stockholders	137,268
Total cash dividends and distributions paid by Aimco	$	191,636

(1) $8.3 million represented distributions to Aimco, and $5.2 million represented distributions paid to holders of OP Units.

(2) $137.3 million represented distributions to Aimco, and $6.7 million represented distributions paid to holders of OP Units.

During the nine months ended September 30, 2015, Aimco issued 9,430,000 shares of its Common Stock, par value $0.01 per share, in an underwritten public offering, for net proceeds per share of $38.90. The offering generated net proceeds to Aimco of $366.6 million.  Aimco contributed the net proceeds from the sale of Common Stock to the Aimco Operating Partnership in exchange for a number of common partnership units equal to the number of shares of Common Stock issued.

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During the nine months ended September 30, 2015, Aimco redeemed for $27.0 million the remaining outstanding shares of its Series A Community Reinvestment Act Preferred Stock. In connection with Aimco’s redemption of preferred stock, the Aimco Operating Partnership redeemed from Aimco an equal number of the corresponding class of partnership preferred units.

Pursuant to ATM offering programs active at September 30, 2015, Aimco has the capacity to issue up to 3.5 million shares of its Common Stock and 3.4 million shares of its Class Z Cumulative Preferred Stock. In the event of any such issuances, Aimco would contribute the net proceeds to the Aimco Operating Partnership in exchange for a number of common OP Units or Class Z Partnership Preferred Units, as the case may be, equal to the number of shares issued and sold. Additionally, the Aimco Operating Partnership and Aimco have a shelf registration statement that provides for the issuance of debt securities by the Aimco Operating Partnership and equity securities by Aimco.

Future Capital Needs

We expect to fund any future acquisitions, development and redevelopment projects, Capital Improvements and Capital Replacements principally with proceeds from property sales, short-term borrowings, debt and equity financing and operating cash flows.

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk

As of the date of this report, there have been no material changes from the market risk information provided in Aimco’s and the Aimco Operating Partnership’s combined Annual Report on Form 10-K for the year ended December 31, 2014.

ITEM 4. Controls and Procedures

Aimco

Disclosure Controls and Procedures

Aimco’s management, with the participation of Aimco’s chief executive officer and chief financial officer, has evaluated the effectiveness of Aimco's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this report. Based on such evaluation, Aimco’s chief executive officer and chief financial officer have concluded that, as of the end of such period, Aimco’s disclosure controls and procedures are effective.

Changes in Internal Control Over Financial Reporting

There has been no change in Aimco’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the third quarter of 2015 that has materially affected, or is reasonably likely to materially affect, Aimco’s internal control over financial reporting.

The Aimco Operating Partnership

Disclosure Controls and Procedures

The Aimco Operating Partnership’s management, with the participation of the chief executive officer and chief financial officer of Aimco, who are the equivalent of the Aimco Operating Partnership’s chief executive officer and chief financial officer, respectively, has evaluated the effectiveness of the Aimco Operating Partnership’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange) as of the end of the period covered by this report. Based on such evaluation, the chief executive officer and chief financial officer of Aimco have concluded that, as of the end of such period, the Aimco Operating Partnership’s disclosure controls and procedures are effective.

Changes in Internal Control Over Financial Reporting

There has been no change in the Aimco Operating Partnership’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the third quarter of 2015 that has materially affected, or is reasonably likely to materially affect, the Aimco Operating Partnership’s internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1A. Risk Factors

As of the date of this report, there have been no material changes from the risk factors in Aimco’s and the Aimco Operating Partnership’s combined Annual Report on Form 10-K for the year ended December 31, 2014.

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

Aimco

(a) Unregistered Sales of Equity Securities. Aimco did not issue any unregistered shares of Common Stock during the nine months ended September 30, 2015.

(c) Repurchases of Equity Securities. There were no repurchases by Aimco of its common equity securities during the nine months ended September 30, 2015. Aimco’s Board of Directors has, from time to time, authorized Aimco to repurchase shares of its outstanding capital stock. As of September 30, 2015, Aimco was authorized to repurchase approximately 19.3 million additional shares. This authorization has no expiration date. These repurchases may be made from time to time in the open market or in privately negotiated transactions.

The Aimco Operating Partnership

(a) Unregistered Sales of Equity Securities. The Aimco Operating Partnership did not issue any common OP Units in exchange for shares of Aimco Common Stock during the nine months ended September 30, 2015. 

(c) Repurchases of Equity Securities. The Aimco Operating Partnership’s Partnership Agreement generally provides that after holding the common OP Units for one year, Limited Partners have the right to redeem their common OP Units for cash, subject to the Aimco Operating Partnership’s prior right to cause Aimco to acquire some or all of the common OP Units tendered for redemption in exchange for shares of Common Stock. Common OP Units redeemed for Common Stock are exchanged on a one-for-one basis (subject to antidilution adjustments). During the three months ended September 30, 2015, no common OP Units were redeemed in exchange for shares of Common Stock. The following table summarizes repurchases of the Aimco Operating Partnership’s equity securities for the three months ended September 30, 2015.

Period	Total Number of Units Purchased	Average Price Paid per Unit		Total Number of Units Purchased as Part of Publicly Announced Plans or Programs (1)	Maximum Number of Units that May Yet Be Purchased Under the Plans or Programs (1)
July 1 - July 31, 2015	3,189	37.74		N/A	N/A
August 1 - August 31, 2015	22,806	38.64		N/A	N/A
September 1 - September 30, 2015	4,302	36.30		N/A	N/A
Total	30,297	$	38.22

(1) The terms of the Aimco Operating Partnership’s Partnership Agreement do not provide for a maximum number of units that may be repurchased, and other than the express terms of its Partnership Agreement, the Aimco Operating Partnership has no publicly announced plans or programs of repurchase. However, whenever Aimco repurchases shares of its Common Stock, it is expected that Aimco will fund the repurchase with proceeds from a concurrent repurchase by the Aimco Operating Partnership of common partnership units held by Aimco at a price per unit that is equal to the price per share paid for its Common Stock.

Aimco and the Aimco Operating Partnership

Dividend and Distribution Payments. Our Credit Agreement includes customary covenants, including a restriction on dividends and distributions and other restricted payments, but permits dividends and distributions during any 12-month period in an aggregate amount of up to 95% of Aimco’s Funds From Operations, subject to certain non-cash adjustments, for such period or such amount as may be necessary for Aimco to maintain its REIT status.

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ITEM 6. Exhibits

The following exhibits are filed with this report:

EXHIBIT NO. (1)		DESCRIPTION
3.1		Aimco – Charter (Exhibit 3.1 to Aimco’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2015, is incorporated herein by this reference)
3.2		Aimco – Amended and Restated Bylaws (Exhibit 3.2 to Aimco’s Current Report on Form 8-K dated February 2, 2010, is incorporated herein by this reference)
10.1		Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of July 29, 1994, as amended and restated as of February 28, 2007 (Exhibit 10.1 to Aimco’s Annual Report on Form 10-K for the year ended December 31, 2006, is incorporated herein by this reference)
10.2		First Amendment to Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of December 31, 2007 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K, dated December 31, 2007, is incorporated herein by this reference)
10.3		Second Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of July 30, 2009 (Exhibit 10.1 to Aimco’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2009, is incorporated herein by this reference)
10.4		Third Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of September 2, 2010 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K, dated September 3, 2010, is incorporated herein by this reference)
10.5		Fourth Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of July 26, 2011 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K, dated July 26, 2011, is incorporated herein by this reference)
10.6		Fifth Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of August 24, 2011 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K, dated August 24, 2011, is incorporated herein by this reference)
10.7		Sixth Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of December 31, 2011 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K, dated December 31, 2011, is incorporated herein by this reference)
10.8		Seventh Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of May 13, 2014 (Exhibit 10.1 to Aimco’s Current Report on Form 8-K dated May 15, 2014, is incorporated by this reference)
10.9		Eighth Amendment to the Fourth Amended and Restated Agreement of Limited Partnership of the Aimco Operating Partnership, dated as of October 31, 2014 (Exhibit 10.1 to Aimco's Current Report on Form 8-K, dated November 4, 2014, is incorporated herein by this reference)
31.1		Aimco – Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2		Aimco – Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.3		The Aimco Operating Partnership – Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.4		The Aimco Operating Partnership – Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1		Aimco – Certifications of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2		The Aimco Operating Partnership – Certifications of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
99.1		Aimco – Agreement Regarding Disclosure of Long-Term Debt Instruments
99.2		The Aimco Operating Partnership – Agreement Regarding Disclosure of Long-Term Debt Instruments
101		XBRL (Extensible Business Reporting Language). The following materials from Aimco’s and the Aimco Operating Partnership’s combined Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2015, tagged in XBRL: (i) condensed consolidated balance sheets; (ii) condensed consolidated statements of operations; (iii) condensed consolidated statements of comprehensive income; (iv) condensed consolidated statements of cash flows; and (v) notes to condensed consolidated financial statements.
(1)	Schedules and supplemental materials to the exhibits have been omitted but will be provided to the Securities and Exchange Commission upon request.

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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.

APARTMENT INVESTMENT AND MANAGEMENT COMPANY
By:	/s/ PAUL L. BELDIN
	Paul L. Beldin
	Executive Vice President and Chief Financial Officer
	(duly authorized officer and
	principal financial officer)
By:	/s/ CHARLES A. HIGDON
	Charles A. Higdon
	Senior Vice President and
	Chief Accounting Officer

AIMCO PROPERTIES, L.P.
By:	AIMCO-GP, Inc., its general partner
By:	/s/ PAUL L. BELDIN
	Paul L. Beldin
	Executive Vice President and Chief Financial Officer
	(duly authorized officer and
	principal financial officer)
By:	/s/ CHARLES A. HIGDON
	Charles A. Higdon
	Senior Vice President and
	Chief Accounting Officer

Date: November 4, 2015

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EX-31.1

Exhibit 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Terry Considine, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Apartment Investment and Management Company;

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

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

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

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

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

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

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

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

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

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

Date: November 4, 2015

/s/ Terry Considine

Terry Considine

Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, Paul L. Beldin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Apartment Investment and Management Company;

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

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

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

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

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

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

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

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

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

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

Date: November 4, 2015

/s/ Paul L. Beldin

Paul L. Beldin

Executive Vice President and Chief

Financial Officer

EX-31.3

Exhibit 31.3

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Terry Considine, certify that:

1. I have reviewed this quarterly report on Form 10-Q of AIMCO Properties, L.P.;

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

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

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

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

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

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

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

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

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

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

Date: November 4, 2015

/s/ Terry Considine

Terry Considine

Chairman and Chief Executive Officer

EX-31.4

Exhibit 31.4

CHIEF FINANCIAL OFFICER CERTIFICATION

I, Paul L. Beldin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of AIMCO Properties, L.P.;

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

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

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

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

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

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

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

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

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

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

Date: November 4, 2015

/s/ Paul L. Beldin

Paul L. Beldin

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of Apartment Investment and Management Company (the “Company”) on Form 10-Q for the period ended September 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

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

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

/s/ Terry Considine

Terry Considine

Chairman and Chief Executive Officer

November 4, 2015

/s/ Paul L. Beldin

Paul L. Beldin

Executive Vice President and Chief Financial Officer

November 4, 2015

EX-32.2

Exhibit 32.2

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

As Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the quarterly report of AIMCO Properties, L.P. (the “Partnership”) on Form 10-Q for the period ended September 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

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

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

/s/ Terry Considine

Terry Considine

Chairman and Chief Executive Officer

November 4, 2015

/s/ Paul L. Beldin

Paul L. Beldin

Executive Vice President and Chief Financial Officer

November 4, 2015

EX-99.1

Exhibit 99.1

Agreement Regarding Disclosure of Long-Term Debt Instruments

In reliance upon Item 601(b)(4)(iii)(A) of Regulation S-K, Apartment Investment and Management Company, a Maryland corporation (the "Company"), has not filed as an exhibit to its quarterly report on Form 10-Q for the quarterly period ended September 30, 2015, any instrument with respect to long-term debt not being registered where the total amount of securities authorized thereunder does not exceed ten percent of the total assets of the Company and its subsidiaries on a consolidated basis. Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Company hereby agrees to furnish a copy of any such agreement to the Securities and Exchange Commission upon request.

By:	/s/ Paul L. Beldin
	Paul L. Beldin
	Executive Vice President and Chief Financial Officer
	November 4, 2015

EX-99.2

Exhibit 99.2

Agreement Regarding Disclosure of Long-Term Debt Instruments

In reliance upon Item 601(b)(4)(iii)(A) of Regulation S-K, AIMCO Properties, L.P., a Delaware limited partnership (the "Partnership"), has not filed as an exhibit to its quarterly report on Form 10-Q for the quarterly period ended September 30, 2015, any instrument with respect to long-term debt not being registered where the total amount of securities authorized thereunder does not exceed ten percent of the total assets of the Partnership and its subsidiaries on a consolidated basis. Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Partnership hereby agrees to furnish a copy of any such agreement to the Securities and Exchange Commission upon request.

By:	/s/ Paul L. Beldin
	Paul L. Beldin
	Executive Vice President and Chief Financial Officer
	November 4, 2015

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Earnings per Share/Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Income from continuing operations	$ 23,769	$ 18,186	$ 66,133	$ 48,169
Gain on dispositions of real estate, net of tax	0	126,329	130,474	262,483
Income from continuing operations and gain on dispositions attributable to noncontrolling interests	(1,844)	(16,487)	(17,553)	(40,655)
Income attributable to preferred equity holders	(2,757)	(2,875)	(9,037)	(5,087)
Loss (income) attributable to participating securities	11	(447)	(690)	(962)
Income from continuing operations attributable to the company's common equity holders	19,179	124,706	169,327	263,948
Net income	23,769	144,515	196,607	310,652
Net income attributable to noncontrolling interests	(1,844)	(16,487)	(17,553)	(40,655)
Net income attributable to preferred equity holders	(2,757)	(2,875)	(9,037)	(5,087)
Net loss (income) attributable to participating securities	11	(447)	(690)	(962)
Net income attributable to the company's common equity holders	$ 19,179	$ 124,706	$ 169,327	$ 263,948
Denominator:
Weighted average common shares/units outstanding – basic (in shares)	155,639	145,672	154,994	145,601
Dilutive potential common shares/units (in shares)	369	432	418	323
Weighted average common shares/units outstanding – diluted (in shares)	156,008	146,104	155,412	145,924
Earnings attributable to the company per common share/unit – basic:
Income from continuing operations	$ 0.12	$ 0.86	$ 1.09	$ 1.81
Net Income	0.12	0.86	1.09	1.81
Earnings attributable to the company per common share/unit - diluted:
Income from continuing operations (in dollars per share/unit)	0.12	0.85	1.09	1.81
Net income	$ 0.12	$ 0.85	$ 1.09	$ 1.81
AIMCO PROPERTIES, L.P [Member]
Numerator:
Income from continuing operations	$ 23,769	$ 18,186	$ 66,133	$ 48,169
Gain on dispositions of real estate, net of tax	0	126,329	130,474	262,483
Income from continuing operations and gain on dispositions attributable to noncontrolling interests	785	(8,337)	(4,082)	(21,952)
Income attributable to preferred equity holders	(4,493)	(4,476)	(14,245)	(9,895)
Loss (income) attributable to participating securities	11	(447)	(690)	(962)
Income from continuing operations attributable to the company's common equity holders	20,072	131,255	177,590	277,843
Net income	23,769	144,515	196,607	310,652
Net income attributable to noncontrolling interests	785	(8,337)	(4,082)	(21,952)
Net income attributable to preferred equity holders	(4,493)	(4,476)	(14,245)	(9,895)
Net loss (income) attributable to participating securities	11	(447)	(690)	(962)
Net income attributable to the company's common equity holders	$ 20,072	$ 131,255	$ 177,590	$ 277,843
Denominator:
Weighted average common shares/units outstanding – basic (in shares)	163,241	153,337	162,616	153,326
Dilutive potential common shares/units (in shares)	369	432	418	323
Weighted average common shares/units outstanding – diluted (in shares)	163,610	153,769	163,034	153,649
Earnings attributable to the company per common share/unit – basic:
Income from continuing operations	$ 0.12	$ 0.86	$ 1.09	$ 1.81
Net Income	0.12	0.86	1.09	1.81
Earnings attributable to the company per common share/unit - diluted:
Income from continuing operations (in dollars per share/unit)	0.12	0.85	1.09	1.81
Net income	$ 0.12	$ 0.85	$ 1.09	$ 1.81

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Basis of Presentation and Summary of Significant Accounting Policies (Details 2) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of common OP Units	$ (2,612)
Amortization of Aimco stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700)
Change in accumulated other comprehensive loss	(308)
Other	137
Net income	191,399
AIMCO PROPERTIES, L.P [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance, December 31, 2014	1,208,809
Balance, September 30, 2015	1,584,325
Partners Capital [Member] | AIMCO PROPERTIES, L.P [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance, December 31, 2014	1,208,809
Issuance of common partnership units to Aimco	366,580
Repurchase of Preferred Units from Aimco	(27,000)
Distributions to preferred units held by Aimco	(8,342)
Distributions to common units held by Aimco	(137,493)
Distributions to common units held by Limited Partners	(6,701)
Redemption of common OP Units	(2,612)
Amortization of Aimco stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700)
Change in accumulated other comprehensive loss	(369)
Other	264
Net income	187,317
Balance, September 30, 2015	$ 1,584,325

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Disposals and Assets Held for Sale

9 Months Ended

Sep. 30, 2015

Discontinued Operations and Disposal Groups [Abstract]

Disposals and Assets Held for Sale

Disposals and Assets Held for Sale

During the three months ended September 30, 2015, we did not sell any consolidated apartment communities, and during the nine months ended September 30, 2015, we sold eight consolidated apartment communities with an aggregate of 2,891 apartment homes and during the year ended December 31, 2014, we sold 30 consolidated apartment communities with an aggregate of 9,067 apartment homes.

In addition to the apartment communities we sold, we are currently marketing for sale certain apartment communities that are inconsistent with our long-term investment strategy. At the end of each reporting period, we evaluate whether such apartment communities meet the criteria to be classified as held for sale. As of September 30, 2015, we had two apartment communities with 476 apartment homes classified as held for sale.

The results of operations for the apartment communities sold or classified as held for sale are reflected within income from continuing operations in our condensed consolidated statements of operations. The apartment communities sold or classified as held for sale during 2015 generated $1.1 million and $6.6 million of net income (before gains on dispositions) during the three and nine months ended September 30, 2015, respectively. The apartment communities sold or classified as held for sale during 2015 and 2014, generated $6.7 million and $29.0 million of net income (before gains on dispositions) during the three and nine months ended September 30, 2014, respectively.

The sale of these apartment communities resulted in gains on disposition of real estate of $130.5 million for the nine months ended September 30, 2015. For the three and nine months ended September 30, 2014, the sale of apartment communities resulted in gains on disposition of real estate of $126.3 million and $262.5 million, respectively, which are net of $21.1 million and $29.8 million of related income taxes. We report gains on disposition net of incremental direct costs incurred in connection with the transactions, including any prepayment penalties incurred upon repayment of property debt collateralized by the apartment communities being sold. Such prepayment penalties totaled $19.8 million for consolidated dispositions during the nine months ended September 30, 2015 ($13.2 million of which represented the mark-to-market adjustment), and $13.6 million and $22.1 million for consolidated dispositions during the three and nine months ended September 30, 2014, respectively ($9.4 million and $15.1 million of which represented the mark-to-market adjustments). In connection with sales of apartment communities during the nine months ended September 30, 2015, the purchasers assumed $6.1 million of non-recourse property debt. In connection with sales of apartment communities during the nine months ended September 30, 2014, the purchasers assumed $56.9 million of non-recourse property debt.

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Other Significant Transactions (Details Textual) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) Units Property $ / shares shares	Sep. 30, 2014 USD ($)
Other Significant Transactions [Line Items]
Proceeds from issuance of Common Stock	$ 366,580	$ 0
Preferred Stock, Redemption Amount	$ 27,000	$ 9,516
Common Class A [Member]
Other Significant Transactions [Line Items]
Shares of Common Stock Issued (in shares) | shares	9,430,000
Gross Offering Price Per Share Of Common Stock Issued (in dollars per share) | $ / shares	$ 38.90
Class A Cumulative Preferred Stock [Member]
Other Significant Transactions [Line Items]
Par Value Per Share of Common Stock Issued (in dollars per share) | $ / shares	$ 0.01
Series A Community Reinvestment Act Preferred Stock [Member]
Other Significant Transactions [Line Items]
Preferred Stock, Redemption Amount	$ 27,000
Napico Portfolio [Member]
Other Significant Transactions [Line Items]
Number of partnerships in legally sold portfolio	14
Napico Portfolio [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Other Significant Transactions [Line Items]
Number of apartment communities | Property	12
Napico Portfolio [Member] | Unconsolidated Properties [Member]
Other Significant Transactions [Line Items]
Number of apartment communities | Property	47
Mezzo - Atlanta GA [Member] [Member]
Other Significant Transactions [Line Items]
Apartment Community Acquisition Price	$ 38,300
Number of apartment homes in apartment communities | Units	94
Axiom Apartment Homes - Cambridge MA [Member]
Other Significant Transactions [Line Items]
Apartment Community Acquisition Price	$ 63,000
Number of apartment homes in apartment communities | Units	115
Percentage of Apartment Homes Occupied	77.00%
270 on Third - Cambridge MA [Member]
Other Significant Transactions [Line Items]
Payments to Acquire Real Estate	$ 27,900
Expected Investment in Development Project	45,000
Development in Process	$ 38,800
Number of apartment homes in apartment communities | Units	91

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Other Significant Transactions (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Income Related to Legally Sold Portfolio [Line Items]
Revenues	$ 246,387	$ 246,843	$ 735,435	$ 742,185
Expenses	(182,366)	(179,376)	(544,704)	(543,643)
Equity in loss of unconsolidated entities, gains or losses on dispositions and other, net	(1,983)	1,733	631	(57)
Income tax benefit (expense) associated with legacy asset management business	8,279	5,005	21,014	13,110
Loss (income) allocated to noncontrolling interests in consolidated real estate partnerships	785	(8,337)	(4,082)	(21,952)
Net income (losses) of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	21,925	128,028	179,054	269,997
Napico Portfolio [Member]
Statement of Income Related to Legally Sold Portfolio [Line Items]
Income tax benefit (expense) associated with legacy asset management business	108	101	(1,916)	411
Loss (income) allocated to noncontrolling interests in consolidated real estate partnerships	2,161	(1,768)	4,672	(1,580)
Net income (losses) of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	376	(143)	3,514	(1,125)
Napico Portfolio [Member] | Other Nonoperating Income Expense [Member]
Statement of Income Related to Legally Sold Portfolio [Line Items]
Revenues	6,120	9,884	19,054	21,234
Expenses	(5,399)	(5,114)	(15,876)	(15,992)
Equity in loss of unconsolidated entities, gains or losses on dispositions and other, net	(2,614)	(3,246)	(2,420)	(5,198)
Net (loss) income related to legacy asset management business	$ (1,893)	$ 1,524	$ 758	$ 44

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Fair Value Measurements (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Assets and Liabilities Measured on Recurring Basis Fair value and input reconciliation [Roll Forward]
Fair Value, Beginning Balance	$ 55,770	$ 53,804
Investment accretion included in interest income	3,142	2,833
Unrealized losses included in interest expense	(36)	(36)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,260	1,265
Unrealized losses included in equity and partners’ capital	(1,568)	(2,106)
Fair Value, Ending Balance	58,568	55,760
Available-for-sale Securities [Member]
Fair Value Assets and Liabilities Measured on Recurring Basis Fair value and input reconciliation [Roll Forward]
Fair Value, Beginning Balance	61,043	58,408
Investment accretion included in interest income	3,142	2,833
Unrealized losses included in equity and partners’ capital	(51)	(618)
Fair Value, Ending Balance	64,134	60,623
Interest Rate Swap [Member]
Fair Value Assets and Liabilities Measured on Recurring Basis Fair value and input reconciliation [Roll Forward]
Fair Value, Beginning Balance	(5,273)	(4,604)
Unrealized losses included in interest expense	(36)	(36)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,260	1,265
Unrealized losses included in equity and partners’ capital	(1,517)	(1,488)
Fair Value, Ending Balance	$ (5,566)	$ (4,863)

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Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value of consolidated debt	$ 4,100,000	$ 4,400,000
Total indebtedness	3,935,899	4,135,139
Cash Flow Hedging [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount of interest rate swaps	$ 50,000	50,300
Average Remaining Maturity of Interest Rate Swaps	5 years 2 months
Period For Reclassification Into Earnings	12 months
Amount of unrealized gains (losses) estimated to be reclassified from accumulated other comprehensive loss to earnings during the next 12 months	$ (1,700)
Weighted average fixed rate of interest rate swaps	3.43%
Available-for-sale Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Face amount of investment in available-for-sale debt securities	$ 100,900
Excepted Remaining Term of Available For Sale Securities	5 years 8 months
Amortized cost of the investment in available-for-sale debt securities		$ 63,600
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized cost of the investment in available-for-sale debt securities	$ 66,700

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Basis of Presentation and Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations, although management believes the disclosures are adequate to prevent the information presented from being misleading. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2015, are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.

The balance sheets of Aimco and the Aimco Operating Partnership at December 31, 2014, have been derived from their respective audited financial statements at that date, but do not include all of the information and disclosures required by GAAP for complete financial statements. For further information, refer to the financial statements and notes thereto included in Aimco’s and the Aimco Operating Partnership’s combined Annual Report on Form 10-K for the year ended December 31, 2014. Except where indicated, the footnotes refer to both Aimco and the Aimco Operating Partnership.

Principles of Consolidation

Aimco’s accompanying condensed consolidated financial statements include the accounts of Aimco, the Aimco Operating Partnership, and their consolidated subsidiaries. The Aimco Operating Partnership’s condensed consolidated financial statements include the accounts of the Aimco Operating Partnership and its consolidated entities.

We consolidate all variable interest entities for which we are the primary beneficiary. Generally, a variable interest entity, or VIE, is a legal entity in which the equity investors do not have the characteristics of a controlling financial interest or the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including, but not limited to: which activities most significantly impact the VIE’s economic performance and which party controls such activities; the amount and characteristics of our investment; the obligation or likelihood for us or other investors to provide financial support; and the similarity with and significance to our business activities and the business activities of the other investors. Significant judgments related to these determinations include estimates about the current and future fair values and performance of real estate held by these VIEs and general market conditions.

As of September 30, 2015, we were the primary beneficiary of, and therefore consolidated, 61 VIEs, which owned 47 apartment communities with 7,459 apartment homes. Substantially all these VIEs are partnerships that are involved in the ownership or operation of qualifying affordable housing apartment communities and which are structured to provide for the pass-through of low-income housing tax credits and deductions to their partners. Real estate with a carrying value of $342.6 million collateralized $327.4 million of debt of those VIEs. Any significant amounts of assets and liabilities related to our consolidated VIEs are identified parenthetically on our accompanying condensed consolidated balance sheets. The creditors of the consolidated VIEs do not have recourse to our general credit.

In addition to the consolidated VIEs discussed above, at September 30, 2015, our consolidated financial statements included certain consolidated and unconsolidated VIEs that are part of the legacy asset management business we sold during 2012, which is discussed in Note 4. The assets and liabilities related to these consolidated and unconsolidated VIEs are each condensed into single line items within other assets and accrued liabilities and other, respectively, in our condensed consolidated balance sheets.

Generally, we consolidate real estate partnerships and other entities that are not variable interest entities when we own, directly or indirectly, a majority voting interest in the entity or are otherwise able to control the entity. All significant intercompany balances and transactions have been eliminated in consolidation.

Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are reflected in Aimco’s accompanying balance sheets as noncontrolling interests in Aimco Operating Partnership. Interests in partnerships consolidated into the Aimco Operating Partnership that are held by third parties are reflected in our accompanying balance sheets as noncontrolling interests in consolidated real estate partnerships. The assets of consolidated real estate partnerships owned or controlled by the Aimco Operating Partnership generally are not available to pay creditors of Aimco or the Aimco Operating Partnership.

Temporary Equity and Partners’ Capital

The following table presents a reconciliation of the Aimco Operating Partnership’s Preferred OP Units from December 31, 2014 to September 30, 2015 (in thousands). These amounts are presented within temporary equity in Aimco’s condensed consolidated balance sheets as preferred noncontrolling interests in the Aimco Operating Partnership, and within temporary capital in the Aimco Operating Partnership’s condensed consolidated balance sheets as redeemable preferred units.

Balance, December 31, 2014	$	87,937
Distributions to preferred unitholders	(5,208		)
Net income	5,208
Balance, September 30, 2015	$	87,937

Aimco Equity (including Noncontrolling Interests)

The following table presents a reconciliation of Aimco’s consolidated permanent equity accounts from December 31, 2014 to September 30, 2015 (in thousands):

	Aimco Equity			Noncontrolling interests in consolidated real estate partnerships			Common noncontrolling interests in Aimco Operating Partnership			Total Equity
Balance, December 31, 2014	$	1,227,735		$	233,296		$	(18,926	)	$	1,442,105
Issuance of Common Stock	366,580			—			—			366,580
Repurchase of preferred stock	(27,000		)	—			—			(27,000		)
Preferred stock dividends	(8,342		)	—			—			(8,342		)
Common dividends and distributions	(137,493		)	(72,873		)	(6,701		)	(217,067		)
Redemptions of common OP Units	—			—			(2,612		)	(2,612		)
Amortization of stock-based compensation cost	5,572			—			—			5,572
Effect of changes in ownership for consolidated entities	(4,328		)	—			2,628			(1,700		)
Change in accumulated other comprehensive loss	(352		)	61			(17		)	(308		)
Other	264			(127		)	—			137
Net income	179,054			4,082			8,263			191,399
Balance, September 30, 2015	$	1,601,690		$	164,439		$	(17,365	)	$	1,748,764

Partners’ Capital attributable to the Aimco Operating Partnership

The following table presents a reconciliation of the consolidated partners’ capital balances in permanent capital that are attributable to the Aimco Operating Partnership from December 31, 2014 to September 30, 2015 (in thousands):

	Partners’ capital  attributable to the Partnership
Balance, December 31, 2014	$	1,208,809
Issuance of common partnership units to Aimco	366,580
Repurchase of Preferred Units from Aimco	(27,000		)
Distributions to preferred units held by Aimco	(8,342		)
Distributions to common units held by Aimco	(137,493		)
Distributions to common units held by Limited Partners	(6,701		)
Redemption of common OP Units	(2,612		)
Amortization of Aimco stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700		)
Change in accumulated other comprehensive loss	(369		)
Other	264
Net income	187,317
Balance, September 30, 2015	$	1,584,325

A separate reconciliation of noncontrolling interests in consolidated real estate partnerships and total partners’ capital for the Aimco Operating Partnership is not presented as these amounts are identical to the corresponding noncontrolling interests in consolidated real estate partnerships and total equity for Aimco, which are presented above.

Use of Estimates

The preparation of our condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts included in the financial statements and accompanying notes thereto. Actual results could differ from those estimates.

Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update 2015-02, which significantly changes the consolidation analysis required under GAAP for VIEs. Under this revised guidance, it is less likely that certain fees, such as asset management fees, would be considered variable interests and therefore fewer entities may be considered VIEs. Additionally, limited partnerships may no longer be viewed as VIEs if the limited partners hold certain rights over the general partner. Alternatively, limited partnerships not previously viewed as VIEs may now be considered VIEs in the absence of such rights. For public companies, the guidance in ASU 2015-02 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015, with early adoption permitted. We have not yet determined the effect ASU 2015-02 will have on our consolidated financial statements.

In April 2015, the FASB issued ASU 2015-03 to revise the presentation of debt issuance costs. Under ASU 2015-03, entities generally will present debt issuance costs in their balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the deferred costs will continue to be included in interest expense. In August 2015, the FASB issued ASU 2015-15 to clarify the SEC staff’s position regarding the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements due to the lack of guidance on this topic in the recently issued ASU 2015-03. The SEC staff recently announced that it would not object to an entity deferring and presenting debt issuance costs associated with line-of-credit arrangements as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the arrangement, regardless of whether there are any outstanding borrowings under the arrangement.

For public companies, the guidance in ASUs 2015-03 and 2015-15, which is to be applied retrospectively to all prior periods, is effective for fiscal years beginning after December 15, 2015, with early adoption permitted for financial statements that have not been previously issued. We do not expect ASUs 2015-03 and 2015-15 to have a significant effect on our consolidated financial statements.

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Commitments and Contingencies (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Long-term construction loan commitment	$ 114.0
Undrawn portion of long term construction loans	48.5
Contract to purchase apartment community currently under construction	320.0
Commitments related to development, redevelopment and capital improvement activities [Member]
Long-term Purchase Commitment [Line Items]
Commitments related to capital spending activities	$ 114.8
Time Period of Long-term Purchase Commitment	12 months
Minimum [Member]
Long-term Purchase Commitment [Line Items]
Compliance Period For Low Income Housing Tax Credit Syndication Agreements	1 year
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Compliance Period For Low Income Housing Tax Credit Syndication Agreements	11 years
Maximum [Member] | Commitments related to operations [Member]
Long-term Purchase Commitment [Line Items]
Time Period of Long-term Purchase Commitment	1 year

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Buildings and improvements	$ 6,421,572	$ 6,259,318
Land	1,878,350	1,885,640
Total real estate	8,299,922	8,144,958
Accumulated depreciation	(2,719,651)	(2,672,179)
Net real estate ($342,568 and $360,160 related to VIEs)	5,580,271	5,472,779
Cash and cash equivalents ($19,944 and $17,108 related to VIEs)	45,241	28,971
Restricted cash ($34,930 and $36,196 related to VIEs)	93,230	91,445
Other assets ($170,046 and $182,108 related to VIEs)	478,961	476,727
Assets held for sale	19,959	27,106
Total assets	6,217,662	6,097,028
LIABILITIES AND EQUITY
Non-recourse property debt ($327,403 and $336,471 related to VIEs)	3,807,699	4,022,809
Revolving credit facility borrowings	128,200	112,330
Total indebtedness	3,935,899	4,135,139
Accounts payable	37,311	41,919
Accrued liabilities and other ($172,290 and $135,644 related to VIEs)	324,746	279,077
Deferred income	65,694	81,882
Liabilities related to assets held for sale	17,311	28,969
Total liabilities	4,380,961	4,566,986
Preferred noncontrolling interests in Aimco Operating Partnership	$ 87,937	$ 87,937
Commitments and contingencies (Note 6)
Equity/Partners' Capital:
Perpetual Preferred Stock	$ 159,126	$ 186,126
Common Stock, $0.01 par value, 500,787,260 shares authorized, 156,421,276 and 146,403,274 shares issued/outstanding at September 30, 2015 and December 31, 2014, respectively	1,564	1,464
Additional paid-in capital	4,064,729	3,696,143
Accumulated other comprehensive loss	(6,810)	(6,456)
Distributions in excess of earnings	(2,616,919)	(2,649,542)
Total Aimco equity	1,601,690	1,227,735
Noncontrolling interests in consolidated real estate partnerships	164,439	233,296
Common noncontrolling interests in Aimco Operating Partnership	(17,365)	(18,926)
Total equity	1,748,764	1,442,105
Total liabilities and equity/partners' capital	6,217,662	6,097,028
AIMCO PROPERTIES, L.P [Member]
ASSETS
Buildings and improvements	6,421,572	6,259,318
Land	1,878,350	1,885,640
Total real estate	8,299,922	8,144,958
Accumulated depreciation	(2,719,651)	(2,672,179)
Net real estate ($342,568 and $360,160 related to VIEs)	5,580,271	5,472,779
Cash and cash equivalents ($19,944 and $17,108 related to VIEs)	45,241	28,971
Restricted cash ($34,930 and $36,196 related to VIEs)	93,230	91,445
Other assets ($170,046 and $182,108 related to VIEs)	478,961	476,727
Assets held for sale	19,959	27,106
Total assets	6,217,662	6,097,028
LIABILITIES AND EQUITY
Non-recourse property debt ($327,403 and $336,471 related to VIEs)	3,807,699	4,022,809
Revolving credit facility borrowings	128,200	112,330
Total indebtedness	3,935,899	4,135,139
Accounts payable	37,311	41,919
Accrued liabilities and other ($172,290 and $135,644 related to VIEs)	324,746	279,077
Deferred income	65,694	81,882
Liabilities related to assets held for sale	17,311	28,969
Total liabilities	4,380,961	4,566,986
Preferred noncontrolling interests in Aimco Operating Partnership	$ 87,937	$ 87,937
Commitments and contingencies (Note 6)
Equity/Partners' Capital:
Preferred units	$ 159,126	$ 186,126
General Partner and Special Limited Partner	1,442,564	1,041,609
Limited Partners	(17,365)	(18,926)
Partners’ capital attributable to the Aimco Operating Partnership	1,584,325	1,208,809
Noncontrolling interests in consolidated real estate partnerships	164,439	233,296
Total partners’ capital	1,748,764	1,442,105
Total liabilities and equity/partners' capital	$ 6,217,662	$ 6,097,028

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 196,607	$ 310,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	226,819	211,143
Gain on dispositions of real estate, net of tax	(130,474)	(262,483)
Other adjustments	(17,137)	204
Net changes in operating assets and operating liabilities	(17,371)	(26,127)
Net cash provided by operating activities	258,444	233,389
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of real estate	(142,207)	(132,463)
Capital expenditures	(277,575)	(277,214)
Proceeds from dispositions of real estate	227,911	564,687
Purchases of corporate assets	(4,625)	(6,405)
Change in restricted cash	2,900	(33,784)
Other investing activities	(22,123)	854
Net cash (used in) provided by investing activities	(215,719)	115,675
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from non-recourse property debt	232,994	83,130
Principal repayments on non-recourse property debt	(418,744)	(376,713)
Net borrowings (repayments) on revolving credit facility	15,870	(35,950)
Proceeds from issuance of preferred securities	0	123,620
Proceeds from issuance of common securities	366,580	0
Redemption and repurchase of preferred securities	(27,000)	(9,516)
Payment of dividends to holders of preferred securities	(8,342)	(3,481)
Payment of dividends to holders of Common Stock	(137,268)	(113,988)
Payment of distributions to noncontrolling interests	(46,026)	(42,969)
Other financing activities	(4,519)	238
Net cash used in financing activities	(26,455)	(375,629)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,270	(26,565)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	28,971	55,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	45,241	29,186
AIMCO PROPERTIES, L.P [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	196,607	310,652
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	226,819	211,143
Gain on dispositions of real estate, net of tax	(130,474)	(262,483)
Other adjustments	(17,137)	204
Net changes in operating assets and operating liabilities	(17,371)	(26,127)
Net cash provided by operating activities	258,444	233,389
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of real estate	(142,207)	(132,463)
Capital expenditures	(277,575)	(277,214)
Proceeds from dispositions of real estate	227,911	564,687
Purchases of corporate assets	(4,625)	(6,405)
Change in restricted cash	2,900	(33,784)
Other investing activities	(22,123)	854
Net cash (used in) provided by investing activities	(215,719)	115,675
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from non-recourse property debt	232,994	83,130
Principal repayments on non-recourse property debt	(418,744)	(376,713)
Net borrowings (repayments) on revolving credit facility	15,870	(35,950)
Proceeds from issuance of preferred securities	0	123,620
Proceeds from issuance of common securities	366,580	0
Redemption and repurchase of preferred securities	(27,000)	(9,516)
Payment of dividends to holders of preferred securities	(13,550)	(8,289)
Payment of distributions to General Partner and Special Limited Partner	(137,268)	(113,988)
Payment of distributions to Limited Partners	(6,701)	(6,020)
Payment of distributions to noncontrolling interests	(34,117)	(32,141)
Other financing activities	(4,519)	238
Net cash used in financing activities	(26,455)	(375,629)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,270	(26,565)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	28,971	55,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 45,241	$ 29,186

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Business Segments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary information for the reportable segments
Rental and other property revenues		$ 240,382	$ 239,873	$ 717,308	$ 719,501
Tax credit and asset management revenues		6,005	6,970	18,127	22,684
Total revenues		246,387	246,843	735,435	742,185
Property operating expenses		88,621	95,240	272,043	289,008
Investment management expenses		1,905	1,279	4,594	3,552
Depreciation and amortization		77,237	69,437	226,819	211,143
Impairment of Real Estate		0	1,413	0	1,413
General and administrative expenses		11,013	10,658	33,727	31,304
Other expenses, net		3,590	1,349	7,521	7,223
Total operating expenses		182,366	179,376	544,704	543,643
Net operating income (loss)		64,021	67,467	190,731	198,542
Other items included in continuing operations		(40,252)	(49,281)	(124,598)	(150,373)
Income from continuing operations		23,769	18,186	66,133	48,169
Operating Segments [Member] | Conventional Real Estate Operations [Member]
Summary information for the reportable segments
Rental and other property revenues		204,246	187,063	599,977	546,381
Total revenues		204,246	187,063	599,977	546,381
Property operating expenses		68,456	63,869	200,660	187,881
Total operating expenses		68,456	63,869	200,660	187,881
Net operating income (loss)		135,790	123,194	399,317	358,500
Income from continuing operations		135,790	123,194	399,317	358,500
Operating Segments [Member] | Affordable Real Estate Operations [Member]
Summary information for the reportable segments
Rental and other property revenues		24,388	23,724	72,779	70,717
Total revenues		24,388	23,724	72,779	70,717
Property operating expenses		9,631	9,274	28,965	29,129
Impairment of Real Estate					0
Total operating expenses		9,631	9,274	28,965	29,129
Net operating income (loss)		14,757	14,450	43,814	41,588
Income from continuing operations		14,757	14,450	43,814	41,588
Proportionate Adjustments [Member]
Summary information for the reportable segments
Rental and other property revenues	[1]	10,219	7,337	28,269	21,704
Total revenues	[1]	10,219	7,337	28,269	21,704
Property operating expenses	[1]	3,434	2,422	10,274	6,820
Total operating expenses	[1]	3,434	2,422	10,274	6,820
Net operating income (loss)	[1]	6,785	4,915	17,995	14,884
Income from continuing operations	[1]	6,785	4,915	17,995	14,884
Corporate Nonsegment And Other Reconciling Items Member [Member]
Summary information for the reportable segments
Rental and other property revenues	[2]	1,529	21,749	16,283	80,699
Tax credit and asset management revenues	[2]	6,005	6,970	18,127	22,684
Total revenues	[2]	7,534	28,719	34,410	103,383
Property operating expenses	[2]	7,100	19,675	32,144	65,178
Investment management expenses	[2]	1,905	1,279	4,594	3,552
Depreciation and amortization	[2]	77,237	69,437	226,819	211,143
Impairment of Real Estate			1,413		1,413
General and administrative expenses	[2]	11,013	10,658	33,727	31,304
Other expenses, net	[2]	3,590	1,349	7,521	7,223
Total operating expenses	[2]	100,845	103,811	304,805	319,813
Net operating income (loss)	[2]	(93,311)	(75,092)	(270,395)	(216,430)
Other items included in continuing operations	[2]	(40,252)	(49,281)	(124,598)	(150,373)
Income from continuing operations	[2]	$ (133,563)	$ (124,373)	$ (394,993)	$ (366,803)

[1] Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the results of our consolidated apartment communities and the results of consolidated apartment communities that we do not manage, which are excluded from our measurement of segment performance but included in the related consolidated amounts, and our share of the results of operations of our unconsolidated real estate partnerships that we manage, which are included in our measurement of segment performance but excluded from the related consolidated amounts.

[2] Our basis for assessing segment performance excludes the results of apartment communities sold or classified as held for sale. In the segment presentation above, the current year and prior year operating results for apartment communities sold or classified as held for sale during 2015 or 2014 are presented within the Corporate and Amounts Not Allocated to Segments column.

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Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) $ in Thousands	Sep. 30, 2015 USD ($) Entity Units Property	Dec. 31, 2014 USD ($)
Variable Interest Entity [Line Items]
Net real estate related to VIEs	$ 5,580,271	$ 5,472,779
Non-recourse property debt related to VIEs	$ 3,807,699	4,022,809
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of consolidated variable interest entities | Entity	61
Number of Apartment Communities | Property	47
Number of apartment homes owned by VIEs | Units	7,459
Net real estate related to VIEs	$ 342,568	360,160
Non-recourse property debt related to VIEs	$ 327,403	$ 336,471

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Business Segments (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) Units Property Segment	Sep. 30, 2014 USD ($)
Business Segments (Textual) [Abstract]
Number of reportable segments | Segment	2
Conventional Real Estate Operations [Member]
Business Segments (Textual) [Abstract]
Number of owned apartment communities in segments | Property	143
Number of apartment homes in apartment communities	41,429
Affordable Real Estate Operations [Member]
Business Segments (Textual) [Abstract]
Number of owned apartment communities in segments | Property	56
Number of apartment homes in apartment communities	8,685
Operating Segments [Member] | Conventional Real Estate Operations [Member]
Business Segments (Textual) [Abstract]
Capital additions related to segments | $	$ 258.7	$ 270.4
Operating Segments [Member] | Affordable Real Estate Operations [Member]
Business Segments (Textual) [Abstract]
Capital additions related to segments | $	$ 6.5	$ 6.6

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Basis of Presentation and Summary of Significant Accounting Policies (Details 1) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	$ 1,442,105
Issuance of Common Stock	366,580
Repurchase of preferred stock	(27,000)
Preferred stock dividends	(8,342)
Common dividends and distributions	(217,067)
Redemptions of common OP Units	(2,612)
Amortization of stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700)
Change in accumulated other comprehensive loss	(308)
Other	137
Net income	191,399
Balance, September 30, 2015	1,748,764
Aimco Equity [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	1,227,735
Issuance of Common Stock	366,580
Repurchase of preferred stock	(27,000)
Preferred stock dividends	(8,342)
Common dividends and distributions	(137,493)
Amortization of stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(4,328)
Change in accumulated other comprehensive loss	(352)
Other	264
Net income	179,054
Balance, September 30, 2015	1,601,690
Noncontrolling Interests in Consolidated Real Estate Partnerships [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	233,296
Issuance of Common Stock	0
Common dividends and distributions	(72,873)
Change in accumulated other comprehensive loss	61
Other	(127)
Net income	4,082
Balance, September 30, 2015	164,439
Common Noncontrolling Interests in Aimco Operating Partnership [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, December 31, 2014	(18,926)
Issuance of Common Stock	0
Common dividends and distributions	(6,701)
Redemptions of common OP Units	(2,612)
Effect of changes in ownership for consolidated entities	2,628
Change in accumulated other comprehensive loss	(17)
Net income	8,263
Balance, September 30, 2015	$ (17,365)

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Organization

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Apartment Investment and Management Company, or Aimco, is a Maryland corporation incorporated on January 10, 1994. Aimco is a self-administered and self-managed real estate investment trust, or REIT. AIMCO Properties, L.P., or the Aimco Operating Partnership, is a Delaware limited partnership formed on May 16, 1994, to conduct our business, which is focused on the ownership and management of quality apartment communities located in the largest coastal and job growth markets in the United States.

Aimco, and through its wholly-owned subsidiaries, AIMCO-GP, Inc. and AIMCO-LP Trust, owns a majority of the ownership interests in the Aimco Operating Partnership. Aimco conducts all of its business and owns all of its assets through the Aimco Operating Partnership. Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are referred to as “OP Units.” OP Units include common partnership units, high performance partnership units and partnership preferred units, which we refer to as common OP Units, HPUs and preferred OP Units, respectively. We also refer to HPUs as common OP Unit equivalents. At September 30, 2015, after eliminations for units held by consolidated entities, the Aimco Operating Partnership had 164,005,054 common partnership units and equivalents outstanding. At September 30, 2015, Aimco owned 156,421,276 of the common partnership units (95.4% of the common partnership units and equivalents) of the Aimco Operating Partnership and Aimco had outstanding an equal number of shares of its Class A Common Stock, which we refer to as Common Stock.

Except as the context otherwise requires, “we,” “our” and “us” refer to Aimco, the Aimco Operating Partnership and their consolidated subsidiaries, collectively.

As of September 30, 2015, we owned an equity interest in 143 conventional apartment communities with 41,429 apartment homes and 56 affordable apartment communities with 8,685 apartment homes. Of these, we consolidated 139 conventional apartment communities with 41,287 apartment homes and 49 affordable apartment communities with 7,998 apartment homes. Conventional and affordable apartment communities generated 90% and 10%, respectively, of the proportionate property net operating income (as defined in Note 8 and excluding amounts related to apartment communities sold or classified as held for sale) during the nine months ended September 30, 2015.

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Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Real estate, net	$ 5,580,271	$ 5,472,779
Cash and cash equivalents	45,241	28,971
Restricted cash	93,230	91,445
Other assets	478,961	476,727
Non-recourse property debt	3,807,699	4,022,809
Accrued liabilities and other	$ 324,746	$ 279,077
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	500,787,260	500,787,260
Common Stock, shares issued (in shares)	156,421,276	146,403,274
Common Stock, shares outstanding (in shares)	156,421,276	146,403,274
AIMCO PROPERTIES, L.P [Member]
Real estate, net	$ 5,580,271	$ 5,472,779
Cash and cash equivalents	45,241	28,971
Restricted cash	93,230	91,445
Other assets	478,961	476,727
Non-recourse property debt	3,807,699	4,022,809
Accrued liabilities and other	324,746	279,077
Variable Interest Entity, Primary Beneficiary [Member]
Real estate, net	342,568	360,160
Cash and cash equivalents	19,944	17,108
Restricted cash	34,930	36,196
Other assets	170,046	182,108
Non-recourse property debt	327,403	336,471
Accrued liabilities and other	172,290	135,644
Variable Interest Entity, Primary Beneficiary [Member] | AIMCO PROPERTIES, L.P [Member]
Real estate, net	342,568	360,160
Cash and cash equivalents	19,944	17,108
Restricted cash	34,930	36,196
Other assets	170,046	182,108
Non-recourse property debt	327,403	336,471
Accrued liabilities and other	$ 172,290	$ 135,644

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Other Significant Transactions (Tables)

9 Months Ended

Sep. 30, 2015

Other Significant Transactions [Abstract]

Schedule of Financial Position Related to Legally Sold Portfolio

The portfolio’s assets and liabilities included in our condensed consolidated balance sheets are summarized below (in thousands):

	September 30, 2015		December 31, 2014
Real estate, net	$	107,407	$	117,851
Cash and cash equivalents	33,715		23,133
Investment in unconsolidated real estate partnerships	766		8,392
Other assets	16,419		11,759
Total assets	$	158,307	$	161,135
Total indebtedness	$	143,987	$	113,641
Accrued and other liabilities	9,299		4,417
Total liabilities	$	153,286	$	118,058
Noncontrolling interests in consolidated real estate partnerships	697		44,106
Equity attributable to Aimco and the Aimco Operating Partnership	4,324		(1,029		)
Total liabilities and equity	$	158,307	$	161,135

Statement of Income Related to Legally Sold Portfolio

Summarized information regarding the Napico portfolio’s results of operations, including any expense we recognize under the profit sharing method, is shown below in thousands. The net income (loss) related to Napico (before income taxes and noncontrolling interests) is included in other, net in our condensed consolidated statements of operations.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Revenues	$	6,120		$	9,884		$	19,054		$	21,234
Expenses	(5,399		)	(5,114		)	(15,876		)	(15,992		)
Equity in loss of unconsolidated entities, gains or losses on dispositions and other, net	(2,614		)	(3,246		)	(2,420		)	(5,198		)
Net (loss) income related to legacy asset management business	(1,893		)	1,524			758			44
Income tax benefit (expense) associated with legacy asset management business	108			101			(1,916		)	411
Loss (income) allocated to noncontrolling interests in consolidated real estate partnerships	2,161			(1,768		)	4,672			(1,580		)
Net income (losses) of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$	376		$	(143	)	$	3,514		$	(1,125	)

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 03, 2015
Entity Registrant Name	APARTMENT INVESTMENT & MANAGEMENT CO
Entity Central Index Key	0000922864
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		156,423,545
AIMCO PROPERTIES, L.P [Member]
Entity Registrant Name	AIMCO PROPERTIES LP
Entity Central Index Key	0000926660
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		163,972,576

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Information regarding these items measured at fair value, both of which are classified within Level 2 of the GAAP fair value hierarchy, is presented below (in thousands):

	AFS Investments			Interest Rate Swaps			Total
Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804
Investment accretion included in interest income	2,833			—			2,833
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,265			1,265
Unrealized losses included in equity and partners’ capital	(618		)	(1,488		)	(2,106		)
Fair value at September 30, 2014	$	60,623		$	(4,863	)	$	55,760
Fair value at December 31, 2014	$	61,043		$	(5,273	)	$	55,770
Investment accretion included in interest income	3,142			—			3,142
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,260			1,260
Unrealized losses included in equity and partners’ capital	(51		)	(1,517		)	(1,568		)
Fair value at September 30, 2015	$	64,134		$	(5,566	)	$	58,568

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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES
Rental and other property revenues	$ 240,382	$ 239,873	$ 717,308	$ 719,501
Tax credit and asset management revenues	6,005	6,970	18,127	22,684
Total revenues	246,387	246,843	735,435	742,185
OPERATING EXPENSES
Property operating expenses	88,621	95,240	272,043	289,008
Investment management expenses	1,905	1,279	4,594	3,552
Depreciation and amortization	77,237	69,437	226,819	211,143
Impairment of Real Estate	0	1,413	0	1,413
General and administrative expenses	11,013	10,658	33,727	31,304
Other expenses, net	3,590	1,349	7,521	7,223
Total operating expenses	182,366	179,376	544,704	543,643
Operating income	64,021	67,467	190,731	198,542
Interest income	1,737	1,787	5,167	5,187
Interest expense	(48,285)	(57,806)	(151,410)	(168,613)
Other, net	(1,983)	1,733	631	(57)
Income before income taxes and gain on dispositions	15,490	13,181	45,119	35,059
Income tax benefit	8,279	5,005	21,014	13,110
Income from continuing operations	23,769	18,186	66,133	48,169
Gain on dispositions of real estate, net of tax	0	126,329	130,474	262,483
Net income	23,769	144,515	196,607	310,652
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	785	(8,337)	(4,082)	(21,952)
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	(1,736)	(1,601)	(5,208)	(4,808)
Net income attributable to common noncontrolling interests in Aimco Operating Partnership	(893)	(6,549)	(8,263)	(13,895)
Net income attributable to noncontrolling interests	(1,844)	(16,487)	(17,553)	(40,655)
Net income attributable to the company	21,925	128,028	179,054	269,997
Net income attributable to the company's preferred equity holders	(2,757)	(2,875)	(9,037)	(5,087)
Net loss (income) attributable to participating securities	11	(447)	(690)	(962)
Net income attributable to the company's common equity holders	$ 19,179	$ 124,706	$ 169,327	$ 263,948
Earnings attributable to the company per common share/unit – basic (Note 7):
Income from continuing operations (in dollars per share/unit)	$ 0.12	$ 0.86	$ 1.09	$ 1.81
Net Income (in dollars per share/unit)	0.12	0.86	1.09	1.81
Earnings attributable to the company per common share/unit – diluted (Note 7):
Income from continuing operations (in dollars per share/unit)	0.12	0.85	1.09	1.81
Net income (in dollars per share/unit)	0.12	0.85	1.09	1.81
Dividends declared per common share/unit	$ 0.30	$ 0.26	$ 0.88	$ 0.78
AIMCO PROPERTIES, L.P [Member]
REVENUES
Rental and other property revenues	$ 240,382	$ 239,873	$ 717,308	$ 719,501
Tax credit and asset management revenues	6,005	6,970	18,127	22,684
Total revenues	246,387	246,843	735,435	742,185
OPERATING EXPENSES
Property operating expenses	88,621	95,240	272,043	289,008
Investment management expenses	1,905	1,279	4,594	3,552
Depreciation and amortization	77,237	69,437	226,819	211,143
Impairment of Real Estate	0	1,413	0	1,413
General and administrative expenses	11,013	10,658	33,727	31,304
Other expenses, net	3,590	1,349	7,521	7,223
Total operating expenses	182,366	179,376	544,704	543,643
Operating income	64,021	67,467	190,731	198,542
Interest income	1,737	1,787	5,167	5,187
Interest expense	(48,285)	(57,806)	(151,410)	(168,613)
Other, net	(1,983)	1,733	631	(57)
Income before income taxes and gain on dispositions	15,490	13,181	45,119	35,059
Income tax benefit	8,279	5,005	21,014	13,110
Income from continuing operations	23,769	18,186	66,133	48,169
Gain on dispositions of real estate, net of tax	0	126,329	130,474	262,483
Net income	23,769	144,515	196,607	310,652
Noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in consolidated real estate partnerships	785	(8,337)	(4,082)	(21,952)
Net income attributable to noncontrolling interests	785	(8,337)	(4,082)	(21,952)
Net income attributable to the company	24,554	136,178	192,525	288,700
Net income attributable to the company's preferred equity holders	(4,493)	(4,476)	(14,245)	(9,895)
Net loss (income) attributable to participating securities	11	(447)	(690)	(962)
Net income attributable to the company's common equity holders	$ 20,072	$ 131,255	$ 177,590	$ 277,843
Earnings attributable to the company per common share/unit – basic (Note 7):
Income from continuing operations (in dollars per share/unit)	$ 0.12	$ 0.86	$ 1.09	$ 1.81
Net Income (in dollars per share/unit)	0.12	0.86	1.09	1.81
Earnings attributable to the company per common share/unit – diluted (Note 7):
Income from continuing operations (in dollars per share/unit)	0.12	0.85	1.09	1.81
Net income (in dollars per share/unit)	0.12	0.85	1.09	1.81
Dividends declared per common share/unit	$ 0.30	$ 0.26	$ 0.88	$ 0.78

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments

In connection with our development, redevelopment and capital improvement activities, we have entered into various construction-related contracts and we have made commitments to complete certain projects, pursuant to financing or other arrangements. As of September 30, 2015, our commitments related to these capital activities totaled approximately $114.8 million, most of which we expect to incur during the next 12 months. Our commitments related to our One Canal Street development project will be funded in part by a $114.0 million non-recourse property loan, of which $48.5 million was available to draw at September 30, 2015.

During the three months ended September 30, 2015, we also entered into a contract to acquire an apartment community currently under construction in Northern California for $320.0 million.  Closing of the acquisition is expected to occur upon completion of construction in the summer of 2016. Consistent with our paired-trade discipline, we intend to fund the acquisition on a leverage neutral basis through a ten-year property loan with the balance funded primarily by proceeds from sales of lower-rated apartment communities.

We also enter into certain commitments for future purchases of goods and services in connection with the operations of our apartment communities. Those commitments generally have terms of one year or less and reflect expenditure levels comparable to our historical expenditures.

Tax Credit Arrangements

We are required to manage certain consolidated real estate partnerships in compliance with various laws, regulations and contractual provisions that apply to our historic and low-income housing tax credit syndication arrangements. In some instances, noncompliance with applicable requirements could result in projected tax benefits not being realized and require a refund or reduction of investor capital contributions, which are reported as deferred income in our condensed consolidated balance sheet, until such time as our obligation to deliver tax benefits is relieved. The remaining compliance periods for our tax credit syndication arrangements range from less than one year to 11 years. We do not anticipate that any material refunds or reductions of investor capital contributions will be required in connection with these arrangements.

Income Taxes

On March 19, 2014, the Internal Revenue Service notified the Aimco Operating Partnership of its intent to audit the 2011 and 2012 tax years.  We do not believe the audit will have any material effect on our unrecognized tax benefits, financial condition or results of operations.

Legal Matters

In addition to the matters described below, we are a party to various legal actions and administrative proceedings arising in the ordinary course of business, some of which are covered by our general liability insurance program, and none of which we expect to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Limited Partnerships

In connection with our acquisitions of interests in real estate partnerships, we are sometimes subject to legal actions, including allegations that such activities may involve breaches of fiduciary duties to the partners of such real estate partnerships or violations of the relevant partnership agreements. We may incur costs in connection with the defense or settlement of such litigation. We believe that we comply with our fiduciary obligations and relevant partnership agreements. Although the outcome of any litigation is uncertain, we do not expect any such legal actions to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Environmental

Various Federal, state and local laws subject apartment community owners or operators to liability for management, and the costs of removal or remediation, of certain potentially hazardous materials that may be present in the land or buildings of an apartment community. Potentially hazardous materials may include polychlorinated biphenyls, petroleum-based fuels, lead-based paint, or asbestos. Such laws often impose liability without regard to fault or whether the owner or operator knew of, or was responsible for, the presence of such materials. The presence of, or the failure to manage or remediate properly, these materials may adversely affect occupancy at such apartment communities as well as the ability to sell or finance such apartment communities. In addition, governmental agencies may bring claims for costs associated with investigation and remediation actions, damages to natural resources and for potential fines or penalties in connection with such damage or with respect to the improper management of hazardous materials. Moreover, private plaintiffs may potentially make claims for personal injury, disease, disability or other infirmities related to the alleged presence of hazardous materials at an apartment community. In addition to potential environmental liabilities or costs associated with our current apartment communities, we may also be responsible for such liabilities or costs associated with communities we acquire or manage in the future, or apartment communities we no longer own or operate.

We are engaged in discussions with the Environmental Protection Agency, or EPA, regarding contaminated groundwater in a residential area in the vicinity of an Indiana apartment community that has not been owned by us since 2008.  The EPA alleges that we are liable for addressing the contamination in the residential area because a dry cleaner that operated on our former property, prior to our ownership, discharged hazardous materials into the sanitary sewers and the environment. We have undertaken a voluntary remediation of the dry cleaner contamination at our former property under the oversight of the Indiana Department of Environmental Management, or IDEM.  However, IDEM has formally terminated us from the voluntary remediation, and we are presently appealing that termination.  Based on our review of the scientific data, we believe that the presence of hazardous materials in the separate residential area under review by the EPA is attributable to neighboring property owners (including an auto parts manufacturer), and not the dry cleaner.  The EPA is now proposing to list the area on the National Priorities List (i.e., as a Superfund site), which would make the site eligible for additional Federal funding.  Were the site to be listed, the EPA could use the funding to further investigate and clean-up the residential area and could then seek to recoup its costs from responsible parties.  Although the outcome of this process is uncertain, we do not expect the resolution to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

We also have been contacted by regulators and the current owner of a property in Lake Tahoe regarding environmental issues allegedly stemming from the historic operation of a dry cleaner on the site.  An entity owned by us was the former general partner of a now-dissolved company that previously owned the dry cleaner site. The Lahontan Regional Water Quality Control Board, or Board, recently tested domestic wells in the area and found two wells with contaminants linked to dry cleaning.  We entered into an agreement with the Board and the current owner to pay for an alternative water connection at an insignificant cost.  During the three months ended September 30, 2015, the Board sent us and the current owner a proposed cleanup and abatement order that, if entered, would require us and the current owner to perform additional groundwater investigation and corrective actions. We are currently assessing potential legal and technical grounds for challenging and/or narrowing the scope of the proposed order.  Although the outcome of this process is uncertain, we do not expect the resolution to have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

We have determined that our legal obligations to remove or remediate certain potentially hazardous materials may be conditional asset retirement obligations, as defined in GAAP. Except in limited circumstances where the asset retirement activities are expected to be performed in connection with a planned construction project or apartment community casualty, we believe that the fair value of our asset retirement obligations cannot be reasonably estimated due to significant uncertainties in the timing and manner of settlement of those obligations. Asset retirement obligations that are reasonably estimable as of September 30, 2015, are immaterial to our consolidated financial condition, results of operations and cash flows.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Recurring Fair Value Measurements

We measure at fair value on a recurring basis our investment in the securitization trust that holds certain of our property debt, which we classify as available for sale, or AFS, securities, and our interest rate swaps. Information regarding these items measured at fair value, both of which are classified within Level 2 of the GAAP fair value hierarchy, is presented below (in thousands):

	AFS Investments			Interest Rate Swaps			Total
Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804
Investment accretion included in interest income	2,833			—			2,833
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,265			1,265
Unrealized losses included in equity and partners’ capital	(618		)	(1,488		)	(2,106		)
Fair value at September 30, 2014	$	60,623		$	(4,863	)	$	55,760
Fair value at December 31, 2014	$	61,043		$	(5,273	)	$	55,770
Investment accretion included in interest income	3,142			—			3,142
Unrealized losses included in interest expense	—			(36		)	(36		)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,260			1,260
Unrealized losses included in equity and partners’ capital	(51		)	(1,517		)	(1,568		)
Fair value at September 30, 2015	$	64,134		$	(5,566	)	$	58,568

Our investments classified as AFS are presented within other assets in the accompanying consolidated balance sheets. We hold several positions in the securitization which pay interest currently, and we also hold the first loss position in the securitization which accrues interest over the term of the investment. We are accreting the discount to the $100.9 million face value of the investments into interest income using the effective interest method over the remaining expected term of the investments, which, as of September 30, 2015, was approximately 5.7 years. Our amortized cost basis for these investments, which represents the original cost adjusted for interest accretion less interest payments received, was $66.7 million and $63.6 million at September 30, 2015 and December 31, 2014, respectively.

We estimate the fair value of these investments in accordance with GAAP using an income and market approach with primarily observable inputs, including yields and other information regarding similar types of investments, and adjusted for certain unobservable inputs specific to these investments. The fair value of the positions that pay interest currently, which typically moves in an inverse relationship with movements in interest rates, exceeded the amortized cost of these investments at the balance sheet dates. The fair value of the first loss position, which is less correlated to movements in interest rates, was less than the amortized cost at the balance sheet dates. We currently expect to hold each of the investments to their maturity dates and we believe we will fully recover our basis in the investments. Accordingly, we believe the current impairment in the fair value, as compared to the amortized cost basis, of the most subordinate tranche of these investments is temporary and we have not recognized any of the decline in value in earnings.

For our variable rate debt, we are sometimes required by limited partners in our consolidated real estate partnerships to limit our exposure to interest rate fluctuations by entering into interest rate swap agreements, which moderate our exposure to interest rate risk by effectively converting the interest on variable rate debt to a fixed rate. We estimate the fair value of interest rate swaps using an income approach with primarily observable inputs including information regarding the hedged variable cash flows and forward yield curves relating to the variable interest rates on which the hedged cash flows are based.

As of September 30, 2015 and December 31, 2014, we had interest rate swaps with aggregate notional amounts of $50.0 million and $50.3 million, respectively. As of September 30, 2015, these swaps had a weighted average remaining term of 5.2 years. We have designated these interest rate swaps as cash flow hedges. The fair value of these swaps is presented within accrued liabilities and other in our condensed consolidated balance sheets, and we recognize any changes in the fair value as an adjustment of accumulated other comprehensive loss within equity and partners’ capital to the extent of their effectiveness.

If the forward rates at September 30, 2015, remain constant, we estimate that during the next 12 months, we would reclassify into earnings approximately $1.7 million of the unrealized losses in accumulated other comprehensive loss. If market interest rates increase above the 3.43% weighted average fixed rate under these interest rate swaps we will benefit from net cash payments due to us from our counterparty to the interest rate swaps.

Fair Value Disclosures

We believe that the aggregate fair value of our cash and cash equivalents, receivables and payables approximates their aggregate carrying amounts at September 30, 2015 and December 31, 2014, due to their relatively short-term nature and high probability of realization. The estimated aggregate fair value of our consolidated total indebtedness was approximately $4.1 billion and $4.4 billion at September 30, 2015 and December 31, 2014, respectively, as compared to aggregate carrying amounts of $3.9 billion and $4.1 billion, respectively. Substantially all of the difference between the fair value and the carrying value of our consolidated indebtedness relates to loans secured by apartment communities we wholly own. We estimate the fair value of our consolidated debt using an income and market approach, including comparison of the contractual terms to observable and unobservable inputs such as market interest rate risk spreads, contractual interest rates, remaining periods to maturity, collateral quality and loan to value ratios on similarly encumbered assets within our portfolio. We classify the fair value of our consolidated debt within Level 3 of the GAAP valuation hierarchy based on the significance of certain of the unobservable inputs used to estimate their fair values.

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Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, December 31, 2014	$ 87,937
Balance, September 30, 2015	87,937
AIMCO PROPERTIES, L.P [Member]
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, December 31, 2014	87,937
Distributions to preferred unitholders	(5,208)
Net income	5,208
Balance, September 30, 2015	$ 87,937

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Earnings per Share/Unit (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted

The following table illustrates Aimco’s calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Income from continuing operations and gain on dispositions attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net income attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Net income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Denominator:
Weighted average common shares outstanding – basic	155,639			145,672			154,994			145,601
Dilutive potential common shares	369			432			418			323
Weighted average common shares outstanding – diluted	156,008			146,104			155,412			145,924
Earnings attributable to Aimco per common share – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to Aimco per common share – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

AIMCO PROPERTIES, L.P [Member]

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted

The following table illustrates the Aimco Operating Partnership’s calculation of basic and diluted earnings per unit for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per unit data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Loss (income) from continuing operations and gain on dispositions attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net loss (income) attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Net income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Denominator:
Weighted average common units outstanding – basic	163,241			153,337			162,616			153,326
Dilutive potential common units	369			432			418			323
Weighted average common units outstanding – diluted	163,610			153,769			163,034			153,649
Earnings attributable to the Aimco Operating Partnership per common unit – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to the Aimco Operating Partnership per common unit – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

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Basis of Presentation and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations, although management believes the disclosures are adequate to prevent the information presented from being misleading. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2015, are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.

The balance sheets of Aimco and the Aimco Operating Partnership at December 31, 2014, have been derived from their respective audited financial statements at that date, but do not include all of the information and disclosures required by GAAP for complete financial statements. For further information, refer to the financial statements and notes thereto included in Aimco’s and the Aimco Operating Partnership’s combined Annual Report on Form 10-K for the year ended December 31, 2014. Except where indicated, the footnotes refer to both Aimco and the Aimco Operating Partnership.

Principles of Consolidation

Principles of Consolidation

Aimco’s accompanying condensed consolidated financial statements include the accounts of Aimco, the Aimco Operating Partnership, and their consolidated subsidiaries. The Aimco Operating Partnership’s condensed consolidated financial statements include the accounts of the Aimco Operating Partnership and its consolidated entities.

We consolidate all variable interest entities for which we are the primary beneficiary. Generally, a variable interest entity, or VIE, is a legal entity in which the equity investors do not have the characteristics of a controlling financial interest or the equity investors lack sufficient equity at risk for the entity to finance its activities without additional subordinated financial support. In determining whether we are the primary beneficiary of a VIE, we consider qualitative and quantitative factors, including, but not limited to: which activities most significantly impact the VIE’s economic performance and which party controls such activities; the amount and characteristics of our investment; the obligation or likelihood for us or other investors to provide financial support; and the similarity with and significance to our business activities and the business activities of the other investors. Significant judgments related to these determinations include estimates about the current and future fair values and performance of real estate held by these VIEs and general market conditions.

As of September 30, 2015, we were the primary beneficiary of, and therefore consolidated, 61 VIEs, which owned 47 apartment communities with 7,459 apartment homes. Substantially all these VIEs are partnerships that are involved in the ownership or operation of qualifying affordable housing apartment communities and which are structured to provide for the pass-through of low-income housing tax credits and deductions to their partners. Real estate with a carrying value of $342.6 million collateralized $327.4 million of debt of those VIEs. Any significant amounts of assets and liabilities related to our consolidated VIEs are identified parenthetically on our accompanying condensed consolidated balance sheets. The creditors of the consolidated VIEs do not have recourse to our general credit.

In addition to the consolidated VIEs discussed above, at September 30, 2015, our consolidated financial statements included certain consolidated and unconsolidated VIEs that are part of the legacy asset management business we sold during 2012, which is discussed in Note 4. The assets and liabilities related to these consolidated and unconsolidated VIEs are each condensed into single line items within other assets and accrued liabilities and other, respectively, in our condensed consolidated balance sheets.

Generally, we consolidate real estate partnerships and other entities that are not variable interest entities when we own, directly or indirectly, a majority voting interest in the entity or are otherwise able to control the entity. All significant intercompany balances and transactions have been eliminated in consolidation.

Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are reflected in Aimco’s accompanying balance sheets as noncontrolling interests in Aimco Operating Partnership. Interests in partnerships consolidated into the Aimco Operating Partnership that are held by third parties are reflected in our accompanying balance sheets as noncontrolling interests in consolidated real estate partnerships. The assets of consolidated real estate partnerships owned or controlled by the Aimco Operating Partnership generally are not available to pay creditors of Aimco or the Aimco Operating Partnership.

Temporary Equity and Partners' Capital

These amounts are presented within temporary equity in Aimco’s condensed consolidated balance sheets as preferred noncontrolling interests in the Aimco Operating Partnership, and within temporary capital in the Aimco Operating Partnership’s condensed consolidated balance sheets as redeemable preferred units.

Use of Estimates

Use of Estimates

The preparation of our condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts included in the financial statements and accompanying notes thereto. Actual results could differ from those estimates.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In February 2015, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update 2015-02, which significantly changes the consolidation analysis required under GAAP for VIEs. Under this revised guidance, it is less likely that certain fees, such as asset management fees, would be considered variable interests and therefore fewer entities may be considered VIEs. Additionally, limited partnerships may no longer be viewed as VIEs if the limited partners hold certain rights over the general partner. Alternatively, limited partnerships not previously viewed as VIEs may now be considered VIEs in the absence of such rights. For public companies, the guidance in ASU 2015-02 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015, with early adoption permitted. We have not yet determined the effect ASU 2015-02 will have on our consolidated financial statements.

In April 2015, the FASB issued ASU 2015-03 to revise the presentation of debt issuance costs. Under ASU 2015-03, entities generally will present debt issuance costs in their balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the deferred costs will continue to be included in interest expense. In August 2015, the FASB issued ASU 2015-15 to clarify the SEC staff’s position regarding the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements due to the lack of guidance on this topic in the recently issued ASU 2015-03. The SEC staff recently announced that it would not object to an entity deferring and presenting debt issuance costs associated with line-of-credit arrangements as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the arrangement, regardless of whether there are any outstanding borrowings under the arrangement.

For public companies, the guidance in ASUs 2015-03 and 2015-15, which is to be applied retrospectively to all prior periods, is effective for fiscal years beginning after December 15, 2015, with early adoption permitted for financial statements that have not been previously issued. We do not expect ASUs 2015-03 and 2015-15 to have a significant effect on our consolidated financial statements.

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Earnings per Share/Unit

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Earnings per Share/Unit

Earnings per Share/Unit

Aimco

Aimco calculates earnings per share based on the weighted average number of shares of Common Stock, participating securities, common stock equivalents and dilutive convertible securities outstanding during the period. The following table illustrates Aimco’s calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Income from continuing operations and gain on dispositions attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net income attributable to noncontrolling interests	(1,844		)	(16,487		)	(17,553		)	(40,655		)
Net income attributable to preferred stockholders	(2,757		)	(2,875		)	(9,037		)	(5,087		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to Aimco common stockholders	$	19,179		$	124,706		$	169,327		$	263,948
Denominator:
Weighted average common shares outstanding – basic	155,639			145,672			154,994			145,601
Dilutive potential common shares	369			432			418			323
Weighted average common shares outstanding – diluted	156,008			146,104			155,412			145,924
Earnings attributable to Aimco per common share – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to Aimco per common share – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

The Aimco Operating Partnership

The Aimco Operating Partnership calculates earnings per unit based on the weighted average number of common partnership units and equivalents, participating securities and dilutive convertible securities outstanding during the period. The Aimco Operating Partnership considers both common OP Units and HPUs, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit data presented below. The following table illustrates the Aimco Operating Partnership’s calculation of basic and diluted earnings per unit for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per unit data):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Numerator:
Income from continuing operations	$	23,769		$	18,186		$	66,133		$	48,169
Gain on dispositions of real estate, net of tax	—			126,329			130,474			262,483
Loss (income) from continuing operations and gain on dispositions attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Income from continuing operations attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Net income	$	23,769		$	144,515		$	196,607		$	310,652
Net loss (income) attributable to noncontrolling interests	785			(8,337		)	(4,082		)	(21,952		)
Net income attributable to the Aimco Operating Partnership’s preferred unitholders	(4,493		)	(4,476		)	(14,245		)	(9,895		)
Net loss (income) attributable to participating securities	11			(447		)	(690		)	(962		)
Net income attributable to the Aimco Operating Partnership’s common unitholders	$	20,072		$	131,255		$	177,590		$	277,843
Denominator:
Weighted average common units outstanding – basic	163,241			153,337			162,616			153,326
Dilutive potential common units	369			432			418			323
Weighted average common units outstanding – diluted	163,610			153,769			163,034			153,649
Earnings attributable to the Aimco Operating Partnership per common unit – basic:
Income from continuing operations	$	0.12		$	0.86		$	1.09		$	1.81
Net income	$	0.12		$	0.86		$	1.09		$	1.81
Earnings attributable to the Aimco Operating Partnership per common unit – diluted:
Income from continuing operations	$	0.12		$	0.85		$	1.09		$	1.81
Net income	$	0.12		$	0.85		$	1.09		$	1.81

Aimco and the Aimco Operating Partnership

As of September 30, 2015, the common share equivalents or common partnership unit equivalents that could potentially dilute basic earnings per share or unit in future periods totaled 1.4 million. These securities represent options to purchase shares of Common Stock, which, if exercised, would result in Aimco’s issuance of additional shares and the Aimco Operating Partnership’s issuance to Aimco of additional common partnership units equal to the number of shares purchased under the options. The effect of these securities was dilutive for the three and nine months ended September 30, 2015 and 2014, and accordingly has been included in the denominator for calculating diluted earnings per share and unit during these periods. Participating securities, consisting of unvested restricted shares of Common Stock, receive dividends similar to shares of Common Stock and common partnership units and totaled 0.7 million shares and 0.5 million shares at September 30, 2015 and 2014, respectively. The effect of participating securities is included in basic and diluted earnings per share and unit computations for the periods presented above using the two-class method of allocating distributed and undistributed earnings.

Various classes of preferred OP Units of the Aimco Operating Partnership are outstanding. Depending on the terms of each class, these preferred OP Units are convertible into common OP Units or redeemable for cash or, at the Aimco Operating Partnership’s option, Common Stock, and are paid distributions varying from 1.9% to 8.8% per annum per unit. As of September 30, 2015, a total of 3.3 million preferred OP Units were outstanding with an aggregate redemption value of $87.9 million and were potentially redeemable for approximately 2.4 million shares of Common Stock (based on the period end market price), or cash at the Aimco Operating Partnership’s option. The Aimco Operating Partnership has a redemption policy that requires cash settlement of redemption requests for the preferred OP Units, subject to limited exceptions. Accordingly, we have excluded these securities from earnings per share and unit computations for the periods presented above, and we expect to exclude them in future periods.

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Business Segments

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Business Segments

Business Segments

We have two reportable segments: conventional real estate operations and affordable real estate operations. Our conventional real estate operations consist of market-rate apartment communities with rents paid by the residents and included 143 apartment communities with 41,429 apartment homes at September 30, 2015. Our affordable real estate operations consisted of 56 apartment communities with 8,685 apartment homes at September 30, 2015, with rents that are generally paid, in whole or part, by a government agency.

Due to the diversity of our economic ownership interests in our apartment communities, our chief executive officer, who is our chief operating decision maker, uses proportionate property net operating income to assess the operating performance of our apartment communities. Proportionate property net operating income reflects our share of rental and other property revenues less direct property operating expenses, including real estate taxes, for the consolidated and unconsolidated apartment communities that we own.

The following tables present the revenues, net operating income (loss) and income (loss) from continuing operations of our conventional and affordable real estate operations segments on a proportionate basis (excluding amounts related to apartment communities sold or classified as held for sale) for the three and nine months ended September 30, 2015 and 2014 (in thousands):

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2015:
Rental and other property revenues	$	204,246	$	24,388	$	10,219	$	1,529		$	240,382
Tax credit and asset management revenues	—		—		—		6,005			6,005
Total revenues	204,246		24,388		10,219		7,534			246,387
Property operating expenses	68,456		9,631		3,434		7,100			88,621
Investment management expenses	—		—		—		1,905			1,905
Depreciation and amortization	—		—		—		77,237			77,237
General and administrative expenses	—		—		—		11,013			11,013
Other expenses, net	—		—		—		3,590			3,590
Total operating expenses	68,456		9,631		3,434		100,845			182,366
Net operating income (loss)	135,790		14,757		6,785		(93,311		)	64,021
Other items included in continuing operations	—		—		—		(40,252		)	(40,252		)
Income (loss) from continuing operations	$	135,790	$	14,757	$	6,785	$	(133,563	)	$	23,769

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2014:
Rental and other property revenues	$	187,063	$	23,724	$	7,337	$	21,749		$	239,873
Tax credit and asset management revenues	—		—		—		6,970			6,970
Total revenues	187,063		23,724		7,337		28,719			246,843
Property operating expenses	63,869		9,274		2,422		19,675			95,240
Investment management expenses	—		—		—		1,279			1,279
Depreciation and amortization	—		—		—		69,437			69,437
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		10,658			10,658
Other expenses, net	—		—		—		1,349			1,349
Total operating expenses	63,869		9,274		2,422		103,811			179,376
Net operating income (loss)	123,194		14,450		4,915		(75,092		)	67,467
Other items included in continuing operations	—		—		—		(49,281		)	(49,281		)
Income (loss) from continuing operations	$	123,194	$	14,450	$	4,915	$	(124,373	)	$	18,186

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2015:
Rental and other property revenues	$	599,977	$	72,779	$	28,269	$	16,283		$	717,308
Asset management and tax credit revenues	—		—		—		18,127			18,127
Total revenues	599,977		72,779		28,269		34,410			735,435
Property operating expenses	200,660		28,965		10,274		32,144			272,043
Investment management expenses	—		—		—		4,594			4,594
Depreciation and amortization	—		—		—		226,819			226,819
General and administrative expenses	—		—		—		33,727			33,727
Other expenses, net	—		—		—		7,521			7,521
Total operating expenses	200,660		28,965		10,274		304,805			544,704
Net operating income (loss)	399,317		43,814		17,995		(270,395		)	190,731
Other items included in continuing operations	—		—		—		(124,598		)	(124,598		)
Income (loss) from continuing operations	$	399,317	$	43,814	$	17,995	$	(394,993	)	$	66,133

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2014:
Rental and other property revenues	$	546,381	$	70,717	$	21,704	$	80,699		$	719,501
Asset management and tax credit revenues	—		—		—		22,684			22,684
Total revenues	546,381		70,717		21,704		103,383			742,185
Property operating expenses	187,881		29,129		6,820		65,178			289,008
Investment management expenses	—		—		—		3,552			3,552
Depreciation and amortization	—		—		—		211,143			211,143
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		31,304			31,304
Other expenses, net	—		—		—		7,223			7,223
Total operating expenses	187,881		29,129		6,820		319,813			543,643
Net operating income (loss)	358,500		41,588		14,884		(216,430		)	198,542
Other items included in continuing operations	—		—		—		(150,373		)	(150,373		)
Income (loss) from continuing operations	$	358,500	$	41,588	$	14,884	$	(366,803	)	$	48,169

(1) Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the results of our consolidated apartment communities and the results of consolidated apartment communities that we do not manage, which are excluded from our measurement of segment performance but included in the related consolidated amounts, and our share of the results of operations of our unconsolidated real estate partnerships that we manage, which are included in our measurement of segment performance but excluded from the related consolidated amounts.

(2) Our basis for assessing segment performance excludes the results of apartment communities sold or classified as held for sale. In the segment presentation above, the current year and prior year operating results for apartment communities sold or classified as held for sale during 2015 or 2014 are presented within the Corporate and Amounts Not Allocated to Segments column. Proportionate property net operating income, our key measurement of segment profit or loss, also excludes property management expenses and casualty gains and losses (which are included in property operating expenses) and depreciation and amortization. Accordingly, we do not allocate these amounts to our segments and they are presented within the Corporate and Amounts Not Allocated to Segments column.

For the nine months ended September 30, 2015 and 2014, capital additions related to our conventional segment totaled $258.7 million and $270.4 million, respectively, and capital additions related to our affordable segment totaled $6.5 million and $6.6 million, respectively.

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

9 Months Ended

Sep. 30, 2015

Schedule of Equity [Line Items]

Reconciliation of consolidated temporary equity accounts

The following table presents a reconciliation of the Aimco Operating Partnership’s Preferred OP Units from December 31, 2014 to September 30, 2015 (in thousands). These amounts are presented within temporary equity in Aimco’s condensed consolidated balance sheets as preferred noncontrolling interests in the Aimco Operating Partnership, and within temporary capital in the Aimco Operating Partnership’s condensed consolidated balance sheets as redeemable preferred units.

Balance, December 31, 2014	$	87,937
Distributions to preferred unitholders	(5,208		)
Net income	5,208
Balance, September 30, 2015	$	87,937

Reconciliation of consolidated permanent equity accounts

The following table presents a reconciliation of Aimco’s consolidated permanent equity accounts from December 31, 2014 to September 30, 2015 (in thousands):

	Aimco Equity			Noncontrolling interests in consolidated real estate partnerships			Common noncontrolling interests in Aimco Operating Partnership			Total Equity
Balance, December 31, 2014	$	1,227,735		$	233,296		$	(18,926	)	$	1,442,105
Issuance of Common Stock	366,580			—			—			366,580
Repurchase of preferred stock	(27,000		)	—			—			(27,000		)
Preferred stock dividends	(8,342		)	—			—			(8,342		)
Common dividends and distributions	(137,493		)	(72,873		)	(6,701		)	(217,067		)
Redemptions of common OP Units	—			—			(2,612		)	(2,612		)
Amortization of stock-based compensation cost	5,572			—			—			5,572
Effect of changes in ownership for consolidated entities	(4,328		)	—			2,628			(1,700		)
Change in accumulated other comprehensive loss	(352		)	61			(17		)	(308		)
Other	264			(127		)	—			137
Net income	179,054			4,082			8,263			191,399
Balance, September 30, 2015	$	1,601,690		$	164,439		$	(17,365	)	$	1,748,764

AIMCO PROPERTIES, L.P [Member]

Schedule of Equity [Line Items]

Reconciliation of consolidated permanent equity accounts

	Partners’ capital  attributable to the Partnership
Balance, December 31, 2014	$	1,208,809
Issuance of common partnership units to Aimco	366,580
Repurchase of Preferred Units from Aimco	(27,000		)
Distributions to preferred units held by Aimco	(8,342		)
Distributions to common units held by Aimco	(137,493		)
Distributions to common units held by Limited Partners	(6,701		)
Redemption of common OP Units	(2,612		)
Amortization of Aimco stock-based compensation cost	5,572
Effect of changes in ownership for consolidated entities	(1,700		)
Change in accumulated other comprehensive loss	(369		)
Other	264
Net income	187,317
Balance, September 30, 2015	$	1,584,325

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Earnings per Share/Unit (Details Textual) - USD ($) $ in Thousands, shares in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Earnings Per Share [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements (in shares)	1.4
Participating securities outstanding (in shares)	0.7		0.5
Preferred OP Units, Distributions, Low Range	1.90%
Preferred OP Units, Distributions, High Range	8.80%
Preferred OP Units Outstanding (in shares)	3.3
Preferred noncontrolling interests in Aimco Operating Partnership	$ 87,937	$ 87,937
Number of Shares of Common Stock Required to Redeem Preferred OP Units Tendered for Redemption, if Parent Chooses to Redeem in Shares Rather than Cash (in shares)	2.4

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Organization (Details Textual)	9 Months Ended
	Sep. 30, 2015 Units Property shares	Dec. 31, 2014 shares
Organization [Line Items]
Common partnership units and equivalents outstanding | shares	156,421,276
Shares of Common Stock outstanding | shares	156,421,276	146,403,274
Percentage of the Aimco Operating Partnership's common partnership units and equivalents owned by Aimco	95.40%
Conventional Real Estate Operations [Member]
Organization [Line Items]
Percentage of proportionate property net operating income generated by segment	90.00%
Affordable Real Estate Operations [Member]
Organization [Line Items]
Percentage of proportionate property net operating income generated by segment	10.00%
Conventional Real Estate Operations [Member]
Organization [Line Items]
Number of owned apartment communities in segments | Property	143
Number of apartment homes in apartment communities	41,429
Conventional Real Estate Operations [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Organization [Line Items]
Number of owned apartment communities in segments | Property	139
Number of apartment homes in apartment communities	41,287
Affordable Real Estate Operations [Member]
Organization [Line Items]
Number of owned apartment communities in segments | Property	56
Number of apartment homes in apartment communities	8,685
Affordable Real Estate Operations [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Organization [Line Items]
Number of owned apartment communities in segments | Property	49
Number of apartment homes in apartment communities	7,998
AIMCO PROPERTIES, L.P [Member]
Organization [Line Items]
Common partnership units and equivalents outstanding | shares	164,005,054

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Disposals and Assets Held for Sale (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) Property	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Units Property	Sep. 30, 2014 USD ($)	Dec. 31, 2014 Units Property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of consolidated apartment communities disposed | Property			8		30
Number of apartment homes in consolidated apartment communities disposed | Units			2,891		9,067
Net income (before gains on dispositions) generated by sold properties	$ 23,769	$ 18,186	$ 66,133	$ 48,169
Gain on dispositions of real estate, net of tax	$ 0	126,329	130,474	262,483
Non-recourse property debt assumed in connection with real estate dispositions			$ 6,100	56,900
Wholly And Partially Owned Consolidated Properties [Member] | Assets Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of apartment homes in apartment communities | Property	476		476
Number of Apartment Communities | Property	2		2
Disposal Group Disposed Of By Sale Not Discontinued Operations [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (before gains on dispositions) generated by sold properties	$ 1,100	6,700	$ 6,600	29,000
Gain (Loss) on Sale of Properties, Applicable Income Taxes		21,100		29,800
Debt prepayment penalties associated with apartment community sales included in gain on dispositions		13,600		22,100
Mark To Market Portion Of Debt Extinguishment Cost Payments		$ 9,400		$ 15,100
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Wholly And Partially Owned Consolidated Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt prepayment penalties associated with apartment community sales included in gain on dispositions			19,800
Mark To Market Portion Of Debt Extinguishment Cost Payments			$ 13,200

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 23,769	$ 144,515	$ 196,607	$ 310,652
Other comprehensive (loss) income:
Unrealized losses on interest rate swaps	(892)	(61)	(1,517)	(1,488)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	418	421	1,260	1,265
Unrealized gains (losses) on debt securities classified as available-for-sale	1,111	(566)	(51)	(618)
Other comprehensive income (loss)	637	(206)	(308)	(841)
Comprehensive income	24,406	144,309	196,299	309,811
Comprehensive income attributable to noncontrolling interests	(1,888)	(16,555)	(17,597)	(40,728)
Comprehensive income attributable to Aimco/Operating Partnership	22,518	127,754	178,702	269,083
AIMCO PROPERTIES, L.P [Member]
Net income	23,769	144,515	196,607	310,652
Other comprehensive (loss) income:
Unrealized losses on interest rate swaps	(892)	(61)	(1,517)	(1,488)
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	418	421	1,260	1,265
Unrealized gains (losses) on debt securities classified as available-for-sale	1,111	(566)	(51)	(618)
Other comprehensive income (loss)	637	(206)	(308)	(841)
Comprehensive income	24,406	144,309	196,299	309,811
Comprehensive income attributable to noncontrolling interests	770	(8,419)	(4,143)	(22,073)
Comprehensive income attributable to Aimco/Operating Partnership	$ 25,176	$ 135,890	$ 192,156	$ 287,738

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Other Significant Transactions

9 Months Ended

Sep. 30, 2015

Other Significant Transactions [Abstract]

Other Significant Transactions

Other Significant Transactions

Investments in Apartment Communities

In March 2015, we acquired for $38.3 million a 94-apartment home community located in Atlanta, Georgia.

In April 2015, we acquired for $63.0 million a 115-apartment home community located in Cambridge, Massachusetts at the completion of its construction. At September 30, 2015, 77% of the apartment homes were occupied.

In June 2015, we purchased a 91-apartment home community under construction at the time of acquisition. This community is also located in Cambridge, Massachusetts, and is two blocks from the apartment community described in the prior paragraph. At closing, we paid $27.9 million and agreed to fund the remaining construction costs. We expect a total investment of $45.0 million in this community, of which $38.8 million has been invested through September 30, 2015. Construction of the apartment homes was completed during the third quarter, and we began lease-up in October. Construction of the community's amenities is expected to be complete by year end.

Asset Management Business Disposition

In December 2012, we sold the Napico portfolio, our legacy asset management business. The transaction was primarily seller-financed, and the associated notes are scheduled to be repaid over several years. The notes will be repaid from the operation and liquidation of the portfolio and are collateralized by the buyer’s interests in the portfolio. 

In accordance with the provisions of GAAP applicable to sales of real estate or interests therein, for accounting purposes, we have not recognized the sale and are accounting for the transaction under the profit sharing method. Until full payment has been received for the seller-financed notes, we will continue to recognize the portfolio’s assets and liabilities, each condensed into single line items within other assets and accrued liabilities and other, respectively, in our consolidated balance sheets, for all dates following the transaction. Similarly, we will continue to recognize the portfolio’s results of operations, also condensed into a single line item within our consolidated statements of operations, for periods subsequent to the transaction. To date we have received all required payments under the seller-financed notes.

At September 30, 2015, the Napico portfolio consisted of 14 partnerships that held investments in 12 apartment communities that were consolidated and 47 apartment communities that were accounted for under the equity or cost methods of accounting. The portfolio’s assets and liabilities included in our condensed consolidated balance sheets are summarized below (in thousands):

	September 30, 2015		December 31, 2014
Real estate, net	$	107,407	$	117,851
Cash and cash equivalents	33,715		23,133
Investment in unconsolidated real estate partnerships	766		8,392
Other assets	16,419		11,759
Total assets	$	158,307	$	161,135
Total indebtedness	$	143,987	$	113,641
Accrued and other liabilities	9,299		4,417
Total liabilities	$	153,286	$	118,058
Noncontrolling interests in consolidated real estate partnerships	697		44,106
Equity attributable to Aimco and the Aimco Operating Partnership	4,324		(1,029		)
Total liabilities and equity	$	158,307	$	161,135

During the nine months ended September 30, 2015, Napico sold a property, resulting in a reduction of real estate, and Napico refinanced a property, resulting in an increase in indebtedness and a reduction in noncontrolling interests in consolidated real estate partnerships, following distribution of the proceeds.

Summarized information regarding the Napico portfolio’s results of operations, including any expense we recognize under the profit sharing method, is shown below in thousands. The net income (loss) related to Napico (before income taxes and noncontrolling interests) is included in other, net in our condensed consolidated statements of operations.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
Revenues	$	6,120		$	9,884		$	19,054		$	21,234
Expenses	(5,399		)	(5,114		)	(15,876		)	(15,992		)
Equity in loss of unconsolidated entities, gains or losses on dispositions and other, net	(2,614		)	(3,246		)	(2,420		)	(5,198		)
Net (loss) income related to legacy asset management business	(1,893		)	1,524			758			44
Income tax benefit (expense) associated with legacy asset management business	108			101			(1,916		)	411
Loss (income) allocated to noncontrolling interests in consolidated real estate partnerships	2,161			(1,768		)	4,672			(1,580		)
Net income (losses) of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$	376		$	(143	)	$	3,514		$	(1,125	)

Revenues decreased during the three and nine months ended September 30, 2015, as compared to the three and nine months ended September 30, 2014, due to an adjustment in 2014 to increase rent subsidies to reflect current market rates for one of the apartment communities in this portfolio.

Based on our limited economic ownership in this portfolio, most of the assets and liabilities are allocated to noncontrolling interests and do not significantly affect our consolidated equity and partners’ capital. Additionally, the operating results of this portfolio generally have an insignificant effect on the amounts of income or loss attributable to us. Income or loss attributable to these noncontrolling interests will continue to be recognized commensurate with the recognition of the results of operations of the portfolio. If full payment is received on the notes and we meet the requirements to recognize the sale for accounting purposes, we expect to recognize a gain attributable to Aimco and the Aimco Operating Partnership.

Equity and Partners’ Capital Transactions

During the nine months ended September 30, 2015, Aimco issued 9,430,000 shares of its Common Stock, par value $0.01 per share, in an underwritten public offering, for net proceeds per share of $38.90. The offering generated net proceeds to Aimco of $366.6 million, net of issuance costs.  Aimco contributed the net proceeds from the sale of Common Stock to the Aimco Operating Partnership in exchange for a number of common partnership units equal to the number of shares of Common Stock issued.

Using the proceeds from this offering, during the nine months ended September 30, 2015, we repaid the then outstanding balance on our Credit Agreement, expanded our unencumbered asset pool, funded redevelopment and property upgrades investments that would otherwise have been funded with property debt on a leverage-neutral basis, and Aimco redeemed the remaining outstanding shares of its Series A Community Reinvestment Act Preferred Stock at its par value of $27.0 million. In connection with Aimco’s redemption of preferred stock, the Aimco Operating Partnership redeemed from Aimco an equal number of the corresponding class of partnership preferred units.

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Other Significant Transactions (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Schedule of Financial Position Related to Legally Sold Portfolio [Line Items]
Real estate, net	$ 5,580,271	$ 5,472,779
Cash and cash equivalents	45,241	28,971	$ 29,186	$ 55,751
Other assets	478,961	476,727
Total assets	6,217,662	6,097,028
Total indebtedness	3,935,899	4,135,139
Accrued and other liabilities	324,746	279,077
Total liabilities	4,380,961	4,566,986
Noncontrolling interests in consolidated real estate partnerships	164,439	233,296
Equity attributable to Aimco and the Aimco Operating Partnership	(17,365)	(18,926)
Total liabilities and equity/partners' capital	6,217,662	6,097,028
Napico Portfolio [Member]
Schedule of Financial Position Related to Legally Sold Portfolio [Line Items]
Noncontrolling interests in consolidated real estate partnerships	697	44,106
Equity attributable to Aimco and the Aimco Operating Partnership	4,324	(1,029)
Total liabilities and equity/partners' capital	158,307	161,135
Napico Portfolio [Member] | Other Assets [Member]
Schedule of Financial Position Related to Legally Sold Portfolio [Line Items]
Real estate, net	107,407	117,851
Cash and cash equivalents	33,715	23,133
Investment in unconsolidated real estate partnerships	766	8,392
Other assets	16,419	11,759
Total assets	158,307	161,135
Napico Portfolio [Member] | Accrued liabilities and other [Member]
Schedule of Financial Position Related to Legally Sold Portfolio [Line Items]
Total indebtedness	143,987	113,641
Accrued and other liabilities	9,299	4,417
Total liabilities	$ 153,286	$ 118,058

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Summary information for the reportable segments

The following tables present the revenues, net operating income (loss) and income (loss) from continuing operations of our conventional and affordable real estate operations segments on a proportionate basis (excluding amounts related to apartment communities sold or classified as held for sale) for the three and nine months ended September 30, 2015 and 2014 (in thousands):

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2015:
Rental and other property revenues	$	204,246	$	24,388	$	10,219	$	1,529		$	240,382
Tax credit and asset management revenues	—		—		—		6,005			6,005
Total revenues	204,246		24,388		10,219		7,534			246,387
Property operating expenses	68,456		9,631		3,434		7,100			88,621
Investment management expenses	—		—		—		1,905			1,905
Depreciation and amortization	—		—		—		77,237			77,237
General and administrative expenses	—		—		—		11,013			11,013
Other expenses, net	—		—		—		3,590			3,590
Total operating expenses	68,456		9,631		3,434		100,845			182,366
Net operating income (loss)	135,790		14,757		6,785		(93,311		)	64,021
Other items included in continuing operations	—		—		—		(40,252		)	(40,252		)
Income (loss) from continuing operations	$	135,790	$	14,757	$	6,785	$	(133,563	)	$	23,769

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Three Months Ended September 30, 2014:
Rental and other property revenues	$	187,063	$	23,724	$	7,337	$	21,749		$	239,873
Tax credit and asset management revenues	—		—		—		6,970			6,970
Total revenues	187,063		23,724		7,337		28,719			246,843
Property operating expenses	63,869		9,274		2,422		19,675			95,240
Investment management expenses	—		—		—		1,279			1,279
Depreciation and amortization	—		—		—		69,437			69,437
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		10,658			10,658
Other expenses, net	—		—		—		1,349			1,349
Total operating expenses	63,869		9,274		2,422		103,811			179,376
Net operating income (loss)	123,194		14,450		4,915		(75,092		)	67,467
Other items included in continuing operations	—		—		—		(49,281		)	(49,281		)
Income (loss) from continuing operations	$	123,194	$	14,450	$	4,915	$	(124,373	)	$	18,186

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2015:
Rental and other property revenues	$	599,977	$	72,779	$	28,269	$	16,283		$	717,308
Asset management and tax credit revenues	—		—		—		18,127			18,127
Total revenues	599,977		72,779		28,269		34,410			735,435
Property operating expenses	200,660		28,965		10,274		32,144			272,043
Investment management expenses	—		—		—		4,594			4,594
Depreciation and amortization	—		—		—		226,819			226,819
General and administrative expenses	—		—		—		33,727			33,727
Other expenses, net	—		—		—		7,521			7,521
Total operating expenses	200,660		28,965		10,274		304,805			544,704
Net operating income (loss)	399,317		43,814		17,995		(270,395		)	190,731
Other items included in continuing operations	—		—		—		(124,598		)	(124,598		)
Income (loss) from continuing operations	$	399,317	$	43,814	$	17,995	$	(394,993	)	$	66,133

	Conventional Real Estate Operations		Affordable Real Estate Operations		Proportionate Adjustments (1)		Corporate and Amounts Not Allocated to Segments (2)			Consolidated
Nine Months Ended September 30, 2014:
Rental and other property revenues	$	546,381	$	70,717	$	21,704	$	80,699		$	719,501
Asset management and tax credit revenues	—		—		—		22,684			22,684
Total revenues	546,381		70,717		21,704		103,383			742,185
Property operating expenses	187,881		29,129		6,820		65,178			289,008
Investment management expenses	—		—		—		3,552			3,552
Depreciation and amortization	—		—		—		211,143			211,143
Provision for real estate impairment losses	—		—		—		1,413			1,413
General and administrative expenses	—		—		—		31,304			31,304
Other expenses, net	—		—		—		7,223			7,223
Total operating expenses	187,881		29,129		6,820		319,813			543,643
Net operating income (loss)	358,500		41,588		14,884		(216,430		)	198,542
Other items included in continuing operations	—		—		—		(150,373		)	(150,373		)
Income (loss) from continuing operations	$	358,500	$	41,588	$	14,884	$	(366,803	)	$	48,169

(1) Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the results of our consolidated apartment communities and the results of consolidated apartment communities that we do not manage, which are excluded from our measurement of segment performance but included in the related consolidated amounts, and our share of the results of operations of our unconsolidated real estate partnerships that we manage, which are included in our measurement of segment performance but excluded from the related consolidated amounts.

(2) Our basis for assessing segment performance excludes the results of apartment communities sold or classified as held for sale. In the segment presentation above, the current year and prior year operating results for apartment communities sold or classified as held for sale during 2015 or 2014 are presented within the Corporate and Amounts Not Allocated to Segments column. Proportionate property net operating income, our key measurement of segment profit or loss, also excludes property management expenses and casualty gains and losses (which are included in property operating expenses) and depreciation and amortization. Accordingly, we do not allocate these amounts to our segments and they are presented within the Corporate and Amounts Not Allocated to Segments column.