Apartment Investment and Management (AIV) 10-K21 Feb 142013 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 20, 2014	Jun. 30, 2013
Entity Registrant Name	'APARTMENT INVESTMENT & MANAGEMENT CO	'	'
Entity Central Index Key	'0000922864	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$4.30
Entity Common Stock, Shares Outstanding	'	146,099,061	'
AIMCO PROPERTIES, L.P	'	'	'
Entity Registrant Name	'AIMCO PROPERTIES LP	'	'
Entity Central Index Key	'0000926660	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Accelerated Filer	'	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS	'	'
Buildings and improvements	$6,332,723	$6,014,062
Land	1,881,358	1,857,956
Total real estate	8,214,081	7,872,018
Less accumulated depreciation	-2,822,872	-2,637,057
Net real estate ($392,245 and $578,421 related to VIEs)	5,391,209	5,234,961
Cash and cash equivalents ($24,094 and $23,599 related to VIEs)	55,751	84,413
Restricted cash ($36,369 and $38,477 related to VIEs)	127,037	145,585
Notes receivable	3,145	102,897
Other assets ($211,287 and $220,910 related to VIEs)	502,271	543,778
Assets held for sale	0	289,746
Total assets	6,079,413	6,401,380
LIABILITIES AND EQUITY	'	'
Non-recourse property debt ($355,372 and $477,791 related to VIEs)	4,337,785	4,413,083
Revolving credit facility borrowings	50,400	0
Total indebtedness	4,388,185	4,413,083
Accounts payable	43,161	30,747
Accrued liabilities and other ($140,910 and $159,607 related to VIEs)	287,595	313,611
Deferred income	107,775	127,561
Liabilities related to assets held for sale	0	281,438
Total liabilities	4,826,716	5,166,440
Preferred noncontrolling interests in Aimco Operating Partnership	79,953	80,046
Commitments and contingencies (Note 7)	0	0
Equity:	'	'
Perpetual Preferred Stock (Note 9)	68,114	68,114
Common Stock, $0.01 par value, 505,787,260 shares authorized, 145,917,387 and 145,563,903 shares issued/outstanding at December 31, 2013 and 2012, respectively	1,459	1,456
Additional paid-in capital	3,701,339	3,712,684
Accumulated other comprehensive loss	-4,602	-3,542
Distributions in excess of earnings	-2,798,853	-2,863,287
Total Aimco equity	967,457	915,425
Noncontrolling interests in consolidated real estate partnerships	233,008	271,065
Common noncontrolling interests in Aimco Operating Partnership	-27,721	-31,596
Total equity	1,172,744	1,154,894
Total liabilities and equity	6,079,413	6,401,380
AIMCO PROPERTIES, L.P	'	'
ASSETS	'	'
Buildings and improvements	6,332,723	6,014,062
Land	1,881,358	1,857,956
Total real estate	8,214,081	7,872,018
Less accumulated depreciation	-2,822,872	-2,637,057
Net real estate ($392,245 and $578,421 related to VIEs)	5,391,209	5,234,961
Cash and cash equivalents ($24,094 and $23,599 related to VIEs)	55,751	84,413
Restricted cash ($36,369 and $38,477 related to VIEs)	127,037	145,585
Notes receivable	3,145	102,897
Other assets ($211,287 and $220,910 related to VIEs)	502,271	543,778
Assets held for sale	0	289,746
Total assets	6,079,413	6,401,380
LIABILITIES AND EQUITY	'	'
Non-recourse property debt ($355,372 and $477,791 related to VIEs)	4,337,785	4,413,083
Revolving credit facility borrowings	50,400	0
Total indebtedness	4,388,185	4,413,083
Accounts payable	43,161	30,747
Accrued liabilities and other ($140,910 and $159,607 related to VIEs)	287,595	313,611
Deferred income	107,775	127,561
Liabilities related to assets held for sale	0	281,438
Total liabilities	4,826,716	5,166,440
Redeemable preferred units	79,953	80,046
Commitments and contingencies (Note 7)	0	0
Equity:	'	'
Preferred units (Note 11)	68,114	68,114
General Partner and Special Limited Partner	899,343	847,311
Limited Partners	-27,721	-31,596
Partnersâ€™ capital attributable to the Aimco Operating Partnership	939,736	883,829
Noncontrolling interests in consolidated real estate partnerships	233,008	271,065
Total partnersâ€™ capital	1,172,744	1,154,894
Total liabilities and equity	$6,079,413	$6,401,380

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Net real estate	$5,391,209	$5,234,961
Cash and cash equivalents	55,751	84,413
Restricted cash	127,037	145,585
Other assets, net	502,271	543,778
Non-recourse property debt	4,337,785	4,413,083
Accrued liabilities and other	287,595	313,611
Common Stock, par value (in dollars per share)	$0.01	$0.01
Common Stock, shares authorized	505,787,260	505,787,260
Common Stock, shares issued	145,917,387	145,563,903
Common Stock, shares outstanding	145,917,387	145,563,903
AIMCO PROPERTIES, L.P	'	'
Net real estate	5,391,209	5,234,961
Cash and cash equivalents	55,751	84,413
Restricted cash	127,037	145,585
Other assets, net	502,271	543,778
Non-recourse property debt	4,337,785	4,413,083
Accrued liabilities and other	287,595	313,611
Common Stock, shares outstanding	153,837,804	'
Variable Interest Entity, Primary Beneficiary [Member]	'	'
Net real estate	392,245	578,421
Cash and cash equivalents	24,094	23,599
Restricted cash	36,369	38,477
Other assets, net	211,287	220,910
Non-recourse property debt	355,372	477,791
Accrued liabilities and other	140,910	159,607
Variable Interest Entity, Primary Beneficiary [Member] \| AIMCO PROPERTIES, L.P	'	'
Net real estate	392,245	578,421
Cash and cash equivalents	24,094	23,599
Restricted cash	36,369	38,477
Other assets, net	211,287	220,910
Non-recourse property debt	355,372	477,791
Accrued liabilities and other	$140,910	$159,607

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
REVENUES:	'		'		'
Rental and other property revenues	$939,231		$916,742		$875,694
Tax credit and asset management revenues	34,822		41,769		38,661
Total revenues	974,053		958,511		914,355
OPERATING EXPENSES:	'		'		'
Property operating expenses	375,672		374,347		376,164
Investment management expenses	4,341		12,008		10,459
Depreciation and amortization	291,910	[1]	325,173	[1]	323,233	[1]
Provision for real estate impairment losses	0		6,235	[1]	0
General and administrative expenses	45,708		49,602		50,906
Other expenses, net	7,403		12,130		18,302
Total operating expenses	725,034		779,495		779,064
Operating income	249,019		179,016		135,291
Interest income	16,059		9,890		9,655
Recovery of losses on notes receivable, net	1,884		3,375		509
Interest expense	-237,048		-229,373		-272,315
Equity in income (losses) of unconsolidated real estate partnerships	926		-4,408		-17,721
Gain on dispositions of unconsolidated real estate and other, net	1,797		21,886		2,403
Income (loss) before income taxes and discontinued operations	32,637		-19,614		-142,178
Income tax benefit	1,959		858		5,941
Income (loss) from continuing operations	34,596		-18,756		-136,237
Income from discontinued operations, net	203,229		214,117		78,073
Net income (loss)	237,825		195,361		-58,164
Noncontrolling interests:	'		'		'
Net (income) loss attributable to noncontrolling interests in consolidated real estate partnerships	-12,473		-51,218		257
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	-6,423		-6,496		-6,683
Net (income) loss attributable to common noncontrolling interests in Aimco Operating Partnership	-11,639		-5,191		7,503
Net (income) loss attributable to noncontrolling interests	-30,535		-62,905		1,077
Net income (loss) attributable to the company	207,290		132,456		-57,087
Net income attributable to the company's preferred equityholders	-2,804		-49,888		-45,852
Net income attributable to participating securities	-813		-422		-222
Net income (loss) attributable to the company's common equityholders	203,673		82,146		-103,161
Earnings (loss) attributable to the company's common equityholders - basic and diluted (Note 13):	'		'		'
Income (loss) from continuing operations attributable to the company's common equityholders ( In dollars per share/unit)	$0.29		($0.60)		($1.22)
Income from discontinued operations attributable to the company's common equityholders (In dollars per share/unit)	$1.11		$1.21		$0.36
Net income (loss) attributable to the company's common equityholders (In dollars per share/unit)	$1.40		$0.61		($0.86)
Weighted average common shares/units outstanding - basic	145,291		134,479		119,312
Weighted average common shares/units outstanding - diluted	145,532		134,479		119,312
AIMCO PROPERTIES, L.P	'		'		'
REVENUES:	'		'		'
Rental and other property revenues	939,231		916,742		875,694
Tax credit and asset management revenues	34,822		41,769		38,661
Total revenues	974,053		958,511		914,355
OPERATING EXPENSES:	'		'		'
Property operating expenses	375,672		374,347		376,164
Investment management expenses	4,341		12,008		10,459
Depreciation and amortization	291,910		325,173		323,233
Provision for real estate impairment losses	0		6,235		0
General and administrative expenses	45,708		49,602		50,906
Other expenses, net	7,403		12,130		18,302
Total operating expenses	725,034		779,495		779,064
Operating income	249,019		179,016		135,291
Interest income	16,059		9,890		10,954
Recovery of losses on notes receivable, net	1,884		3,375		509
Interest expense	-237,048		-229,373		-272,315
Equity in income (losses) of unconsolidated real estate partnerships	926		-4,408		-17,721
Gain on dispositions of unconsolidated real estate and other, net	1,797		21,886		2,403
Income (loss) before income taxes and discontinued operations	32,637		-19,614		-140,879
Income tax benefit	1,959		858		5,941
Income (loss) from continuing operations	34,596		-18,756		-134,938
Income from discontinued operations, net	203,229		214,117		78,073
Net income (loss)	237,825		195,361		-56,865
Noncontrolling interests:	'		'		'
Net (income) loss attributable to noncontrolling interests in consolidated real estate partnerships	-12,473		-51,218		257
Net (income) loss attributable to noncontrolling interests	-12,473		-51,218		257
Net income (loss) attributable to the company	225,352		144,143		-56,608
Net income attributable to the company's preferred equityholders	-9,227		-56,384		-52,535
Net income attributable to participating securities	-813		-422		-222
Net income (loss) attributable to the company's common equityholders	$215,312		$87,337		($109,365)
Earnings (loss) attributable to the company's common equityholders - basic and diluted (Note 13):	'		'		'
Income (loss) from continuing operations attributable to the company's common equityholders ( In dollars per share/unit)	$0.29		($0.60)		($1.22)
Income from discontinued operations attributable to the company's common equityholders (In dollars per share/unit)	$1.11		$1.21		$0.36
Net income (loss) attributable to the company's common equityholders (In dollars per share/unit)	$1.40		$0.61		($0.86)
Weighted average common shares/units outstanding - basic	153,256		142,614		127,681
Weighted average common shares/units outstanding - diluted	153,497		142,614		127,681

[1]	Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income (loss)	$237,825	$195,361	($58,164)
Other comprehensive (loss) income:	'	'	'
Unrealized gains (losses) on interest rate swaps	1,734	-2,581	-5,885
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,678	1,673	1,667
Unrealized (losses) gains on debt securities classified as available-for-sale	-4,188	4,341	-1,509
Other comprehensive (loss) income	-776	3,433	-5,727
Comprehensive income (loss)	237,049	198,794	-63,891
Comprehensive (income) loss attributable to noncontrolling interests	-30,819	-63,020	2,020
Comprehensive income (loss) attributable to entity	206,230	135,774	-61,871
AIMCO PROPERTIES, L.P	'	'	'
Net income (loss)	237,825	195,361	-56,865
Other comprehensive (loss) income:	'	'	'
Unrealized gains (losses) on interest rate swaps	1,734	-2,581	-5,885
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,678	1,673	1,667
Unrealized (losses) gains on debt securities classified as available-for-sale	-4,188	4,341	-1,509
Other comprehensive (loss) income	-776	3,433	-5,727
Comprehensive income (loss)	237,049	198,794	-62,592
Comprehensive (income) loss attributable to noncontrolling interests	-12,815	-51,134	697
Comprehensive income (loss) attributable to entity	$224,234	$147,660	($61,895)

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Distributions in Excess of Earnings	Total Aimco Equity	Noncontrolling Interests
In Thousands, except Share data	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Distributions in Excess of Earnings	Total Aimco Equity	Noncontrolling Interests
Beginning Balances at Dec. 31, 2010	$1,306,772	$657,601	$1,176	$3,070,296	($2,076)	($2,680,955)	$1,046,042	$260,730
Beginning Balances, Shares at Dec. 31, 2010	'	24,900,000	117,643,000	'	'	'	'	'
Issuance of Preferred Stock, Shares	'	869,000	'	'	'	'	'	'
Issuance of Preferred Stock	19,990	21,075	'	'	'	'	19,990	'
Issuance of Preferred Stock (issue costs)	'	'	'	-1,085	'	'	'	'
Redemption of Preferred Stock, Shares	'	-863,000	'	'	'	'	'	'
Redemption of Preferred Stock	-16,366	-21,562	'	'	'	'	-16,366	'
Redemption of Preferred Stock (recognition of previously deferred issuance costs)	'	'	'	-1,292	'	-3,904	'	'
Issuance of Common Stock, Shares	'	'	2,914,000	'	'	'	'	'
Issuance of Common Stock	71,942	'	29	71,913	'	'	71,942	'
Redemption of Aimco Operating Partnership units	-6,059	'	'	'	'	'	'	-6,059
Officer and employee stock awards and related amounts, net, Shares	'	'	-317,000	'	'	'	'	'
Officer and employee stock awards and related amounts, net	2,107	'	3	2,094	'	10	2,107	'
Amortization of share-based compensation cost, Shares	'	'	42,000	'	'	'	'	'
Amortization of share-based compensation cost	5,883	'	1	5,882	'	'	5,883	'
Contributions from noncontrolling interests	12,358	'	'	'	'	'	'	12,358
Effect of changes in ownership for consolidated entities	-22,313	'	'	-52,059	'	'	-52,059	29,746
Change in accumulated other comprehensive loss	-5,727	'	'	'	-4,784	'	-4,784	-943
Net income (loss)	-64,847	'	'	'	'	-57,087	-57,087	-7,760
Distributions to noncontrolling interests	-51,727	'	'	'	'	'	'	-51,727
Common Stock dividends	-57,583	'	'	'	'	-57,583	-57,583	'
Preferred Stock dividends	-49,756	'	'	'	'	-49,756	-49,756	'
Ending Balances at Dec. 31, 2011	1,144,674	657,114	1,209	3,098,333	-6,860	-2,841,467	908,329	236,345
Ending Balances, Shares at Dec. 31, 2011	'	24,906,000	120,916,000	'	'	'	'	'
Issuance of Preferred Stock, Shares	'	405,000	'	'	'	'	'	'
Issuance of Preferred Stock	9,818	10,039	'	'	'	'	9,818	'
Issuance of Preferred Stock (issue costs)	'	'	'	-221	'	'	'	'
Redemption of Preferred Stock, Shares	'	-24,037,000	'	'	'	'	'	'
Redemption of Preferred Stock	-600,938	-599,039	'	'	'	'	-600,938	'
Redemption of Preferred Stock (recognition of previously deferred issuance costs)	'	'	'	-20,727	'	22,626	'	'
Issuance of Common Stock, Shares	'	'	22,144,000	'	'	'	'	'
Issuance of Common Stock	594,379	'	221	594,158	'	'	594,379	'
Redemption of Aimco Operating Partnership units	-11,079	'	'	'	'	'	'	-11,079
Amortization of share-based compensation cost, Shares	'	'	36,000	'	'	'	'	'
Amortization of share-based compensation cost	5,223	'	'	5,223	'	'	5,223	'
Exercises of stock options, Shares	'	'	2,254,000	'	'	'	'	'
Exercises of stock options	48,907	'	24	48,883	'	'	48,907	'
Contributions from noncontrolling interests	2,928	'	'	'	'	'	'	2,928
Effect of changes in ownership for consolidated entities	-53,240	'	'	-54,799	'	'	-54,799	1,559
Change in accumulated other comprehensive loss	3,433	'	'	'	3,318	'	3,318	115
Other, net, shares	'	'	214,000	'	'	'	'	'
Other, net	4,547	'	2	380	'	-380	2	4,545
Net income (loss)	188,865	'	'	'	'	132,456	132,456	56,409
Distributions to noncontrolling interests	-51,353	'	'	'	'	'	'	-51,353
Common Stock dividends	-104,006	'	'	'	'	-104,006	-104,006	'
Preferred Stock dividends	-27,264	'	'	'	'	-27,264	-27,264	'
Ending Balances at Dec. 31, 2012	1,154,894	68,114	1,456	3,712,684	-3,542	-2,863,287	915,425	239,469
Ending Balances, Shares at Dec. 31, 2012	'	1,274,000	145,564,000	'	'	'	'	'
Redemption of Aimco Operating Partnership units	-3,085	'	'	'	'	'	'	-3,085
Amortization of share-based compensation cost, Shares	'	'	33,000	'	'	'	'	'
Amortization of share-based compensation cost	5,915	'	'	5,915	'	'	5,915	'
Exercises of stock options, Shares	'	'	44,000	'	'	'	'	'
Exercises of stock options	993	'	'	993	'	'	993	'
Contributions from noncontrolling interests	1,630	'	'	'	'	'	'	1,630
Effect of changes in ownership for consolidated entities	-17,675	'	'	-19,805	'	'	-19,805	2,130
Change in accumulated other comprehensive loss	-776	'	'	'	-1,060	'	-1,060	284
Other, net, shares	'	'	276,000	'	'	'	'	'
Other, net	2,248	'	3	1,552	'	'	1,555	693
Net income (loss)	231,402	'	'	'	'	207,290	207,290	24,112
Distributions to noncontrolling interests	-59,946	'	'	'	'	'	'	-59,946
Common Stock dividends	-140,052	'	'	'	'	-140,052	-140,052	'
Preferred Stock dividends	-2,804	'	'	'	'	-2,804	-2,804	'
Ending Balances at Dec. 31, 2013	$1,172,744	$68,114	$1,459	$3,701,339	($4,602)	($2,798,853)	$967,457	$205,287
Ending Balances, Shares at Dec. 31, 2013	'	1,274,000	145,917,000	'	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:	'		'		'
Net income (loss)	$237,825		$195,361		($58,164)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'		'		'
Depreciation and amortization	291,910	[1]	325,173	[1]	323,233	[1]
Provision for real estate impairment losses	0		6,235	[1]	0
Equity in (income) losses of unconsolidated real estate partnerships	-926		4,408		17,721
Gain on dispositions of unconsolidated real estate and other, net	-1,797		-21,886		-2,403
Income tax benefit	-1,959		-858		-5,941
Share-based compensation expense	5,645		4,871		5,381
Amortization of deferred loan costs and other	4,915		5,044		5,696
Discontinued operations:	'		'		'
Depreciation and amortization	16,372		41,577		72,099
Gain on disposition of real estate	-212,459		-234,530		-108,203
Other adjustments to income from discontinued operations	10,019		27,854		27,088
Changes in operating assets and operating liabilities:	'		'		'
Accounts receivable and other assets	4,592		30,716		8,315
Accounts payable, accrued liabilities and other	-28,541		-67,138		-26,003
Total adjustments	87,771		121,466		316,983
Net cash provided by operating activities	325,596		316,827		258,819
CASH FLOWS FROM INVESTING ACTIVITIES:	'		'		'
Purchases of real estate and investments in unconsolidated real estate partnerships	-51,291		-89,716		-64,976
Capital expenditures	-350,338		-270,210		-200,372
Proceeds from dispositions of real estate	357,314		484,904		326,853
Purchases of interests in unconsolidated real estate and corporate assets	-10,863		-7,818		-15,123
Purchase of investment in debt securities	0		0		-51,534
Purchase of West Harlem first mortgage property loans	-119,101		0		0
Proceeds from repayment of West Harlem property loans and option value	215,517		0		0
Proceeds from sales of and distributions from unconsolidated real estate partnerships	0		31,192		17,095
Changes in restricted cash	3,003		-22,886		10,306
Other investing activities	20,951		-13,799		18,245
Net cash provided by investing activities	65,192		111,667		40,494
CASH FLOWS FROM FINANCING ACTIVITIES:	'		'		'
Proceeds from non-recourse property debt	232,965		243,253		927,093
Principal repayments on non-recourse property debt	-472,276		-447,792		-1,083,690
Net borrowings on revolving credit facility	50,400		'		0
Proceeds from issuance of common stock or units	0		594,379		71,942
Redemptions and repurchases of preferred stock or units	0		-600,938		-36,367
Proceeds from Common Stock option exercises	993		48,907		1,806
Payment of dividends to holders of preferred stock or units	-2,804		-37,019		-49,756
Payment of dividends to holders of Common Stock	-140,052		-104,006		-57,583
Payment of distributions to noncontrolling interests	-63,766		-57,849		-58,413
Purchases of noncontrolling interests in consolidated real estate partnerships	-16,775		-57,008		-14,811
Other financing activities	-8,135		-17,074		-19,793
Net cash used in financing activities	-419,450		-435,147		-319,572
NET DECREASE IN CASH AND CASH EQUIVALENTS	-28,662		-6,653		-20,259
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	84,413		91,066		111,325
CASH AND CASH EQUIVALENTS AT END OF PERIOD	55,751		84,413		91,066
Supplemental Cash Flow Information [Abstract]	'		'		'
Interest Paid	273,635		294,423		336,565
Cash paid for income taxes	600		1,100		1,200
Non-cash transactions associated with the acquisition or disposition of real estate:	'		'		'
Secured debt assumed in connection with our acquisition of real estate	14,767		38,779		0
Secured debt assumed by buyer in connection with our disposition of real estate	126,663		208,134		127,494
Secured, subordinate debt of the disposed legacy asset management business forgiven in connection with the disposition of real estate	8,149		15,019		0
Other non-cash transactions:	'		'		'
Issuance of common OP Units for acquisition of noncontrolling interests in consolidated real estate partnerships	416		4,553		168
AIMCO PROPERTIES, L.P	'		'		'
CASH FLOWS FROM OPERATING ACTIVITIES:	'		'		'
Net income (loss)	237,825		195,361		-56,865
Adjustments to reconcile net income (loss) to net cash provided by operating activities:	'		'		'
Depreciation and amortization	291,910		325,173		323,233
Provision for real estate impairment losses	0		6,235		0
Equity in (income) losses of unconsolidated real estate partnerships	-926		4,408		17,721
Gain on dispositions of unconsolidated real estate and other, net	-1,797		-21,886		-2,403
Income tax benefit	-1,959		-858		-5,941
Share-based compensation expense	5,645		4,871		5,381
Amortization of deferred loan costs and other	4,915		5,044		5,696
Discontinued operations:	'		'		'
Depreciation and amortization	16,372		41,577		72,099
Gain on disposition of real estate	-212,459		-234,530		-108,203
Other adjustments to income from discontinued operations	10,019		27,854		27,088
Changes in operating assets and operating liabilities:	'		'		'
Accounts receivable and other assets	4,592		30,716		7,016
Accounts payable, accrued liabilities and other	-28,541		-67,138		-26,003
Total adjustments	87,771		121,466		315,684
Net cash provided by operating activities	325,596		316,827		258,819
CASH FLOWS FROM INVESTING ACTIVITIES:	'		'		'
Purchases of real estate and investments in unconsolidated real estate partnerships	-51,291		-89,716		-64,976
Capital expenditures	-350,338		-270,210		-200,372
Proceeds from dispositions of real estate	357,314		484,904		326,853
Purchases of interests in unconsolidated real estate and corporate assets	-10,863		-7,818		-15,123
Purchase of investment in debt securities	0		0		-51,534
Purchase of West Harlem first mortgage property loans	-119,101		0		0
Proceeds from repayment of West Harlem property loans and option value	215,517		0		0
Proceeds from sales of and distributions from unconsolidated real estate partnerships	0		31,192		17,095
Changes in restricted cash	3,003		-22,886		10,306
Repayment of notes receivable from Aimco	0		0		18,798
Other investing activities	20,951		-13,799		18,245
Net cash provided by investing activities	65,192		111,667		59,292
CASH FLOWS FROM FINANCING ACTIVITIES:	'		'		'
Proceeds from non-recourse property debt	232,965		243,253		927,093
Principal repayments on non-recourse property debt	-472,276		-447,792		-1,083,690
Net borrowings on revolving credit facility	50,400		0		0
Proceeds from issuance of common stock or units	0		594,379		71,942
Redemptions and repurchases of preferred stock or units	0		-600,938		-36,367
Proceeds from Common Stock option exercises	993		48,907		1,806
Payment of dividends to holders of preferred stock or units	-9,227		-43,515		-56,439
Payment of distributions to General Partner and Special Limited Partner	-140,052		-104,006		-76,381
Payment of distributions to Limited Partners	-7,642		-6,153		-5,264
Payment of distributions to noncontrolling interests	-49,701		-45,200		-46,466
Purchases of noncontrolling interests in consolidated real estate partnerships	-16,775		-57,008		-14,811
Other financing activities	-8,135		-17,074		-19,793
Net cash used in financing activities	-419,450		-435,147		-338,370
NET DECREASE IN CASH AND CASH EQUIVALENTS	-28,662		-6,653		-20,259
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	84,413		91,066		111,325
CASH AND CASH EQUIVALENTS AT END OF PERIOD	55,751		84,413		91,066
Supplemental Cash Flow Information [Abstract]	'		'		'
Interest Paid	273,635		294,423		336,565
Cash paid for income taxes	629		1,056		1,233
Non-cash transactions associated with the acquisition or disposition of real estate:	'		'		'
Secured debt assumed in connection with our acquisition of real estate	14,767		38,779		0
Secured debt assumed by buyer in connection with our disposition of real estate	126,663		208,134		127,494
Secured, subordinate debt of the disposed legacy asset management business forgiven in connection with the disposition of real estate	8,149		15,019		0
Other non-cash transactions:	'		'		'
Issuance of common OP Units for acquisition of noncontrolling interests in consolidated real estate partnerships	$416		$4,553		$168

[1]	Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

Consolidated_Statements_of_Par

Consolidated Statements of Partners' Capital (USD $)	Total	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P
In Thousands	Total	AIMCO PROPERTIES, L.P	Preferred Units	General Partner and Special Limited Partner	Limited Partners	Partnersâ€™ Capital Attributable to the Partnership	Non - controlling Interests
Partners' Capital at Dec. 31, 2010	'	$1,324,002	$657,601	$406,020	($31,077)	$1,032,544	$291,458
Issuance of preferred units to Aimco	'	19,990	21,075	'	'	19,990	'
Issuance of preferred units to Aimco (issuance costs)	'	'	'	-1,085	'	'	'
Redemption of preferred units held by Aimco	'	-16,366	-21,562	'	'	-16,366	'
Redemption of preferred units held by Aimco	'	'	'	5,196	'	'	'
Issuance of common partnership units to Aimco	'	71,942	'	71,942	'	71,942	'
Redemption of partnership units held by non-Aimco partners	'	-6,059	'	'	-6,059	-6,059	'
Contribution from Aimco related to employee stock purchases and related amounts, net	'	2,107	'	2,107	'	2,107	'
Amortization of Aimco stock-based compensation	'	5,883	'	5,883	'	5,883	'
Contributions from noncontrolling interests	12,358	12,358	'	'	'	'	12,358
Effect of changes in ownership for consolidated entities	-22,305	-22,313	'	-52,059	15,736	-36,323	14,010
Change in accumulated other comprehensive loss	-5,727	-5,727	'	-4,784	-503	-5,287	-440
Net income (loss)	'	-63,548	'	-56,137	-7,154	-63,291	-257
Distributions to noncontrolling interests	-51,727	-46,463	'	'	'	'	-46,463
Distributions to common unitholders	'	-81,376	'	-76,112	-5,264	-81,376	'
Distributions to preferred unitholders	'	-49,756	'	-49,756	'	-49,756	'
Partners' Capital at Dec. 31, 2011	'	1,144,674	657,114	251,215	-34,321	874,008	270,666
Issuance of preferred units to Aimco	'	9,818	10,039	'	'	9,818	'
Redemption of preferred units held by Aimco	'	-600,938	-599,039	-1,899	'	-600,938	'
Redemption of preferred units held by Aimco	'	'	'	-221	'	'	'
Issuance of common partnership units to Aimco	'	594,379	'	594,379	'	594,379	'
Redemption of partnership units held by non-Aimco partners	'	-11,079	'	'	-11,079	-11,079	'
Amortization of Aimco stock-based compensation	'	5,223	'	5,223	'	5,223	'
Issuance of common partnership units to Aimco in connection with exercise of Aimco stock options	48,907	48,907	'	48,907	'	48,907	'
Contributions from noncontrolling interests	2,928	2,928	'	'	'	'	2,928
Effect of changes in ownership for consolidated entities	-50,654	-53,240	'	-54,799	10,022	-44,777	-8,463
Change in accumulated other comprehensive loss	3,433	3,433	'	3,318	199	3,517	-84
Other, net	'	4,547	'	2	4,545	4,547	'
Net income (loss)	'	188,865	'	132,456	5,191	137,647	51,218
Distributions to noncontrolling interests	-51,353	-45,200	'	'	0	0	-45,200
Distributions to common unitholders	'	-110,159	'	-104,006	-6,153	-110,159	'
Distributions to preferred unitholders	'	-27,264	'	-27,264	'	-27,264	'
Partners' Capital at Dec. 31, 2012	'	1,154,894	68,114	847,311	-31,596	883,829	271,065
Redemption of partnership units held by non-Aimco partners	'	-3,085	'	'	-3,085	-3,085	'
Amortization of Aimco stock-based compensation	'	5,915	'	5,915	'	5,915	'
Issuance of common partnership units to Aimco in connection with exercise of Aimco stock options	993	993	'	993	'	993	'
Contributions from noncontrolling interests	1,630	1,630	'	'	'	'	1,630
Effect of changes in ownership for consolidated entities	-17,170	-17,675	'	-19,805	2,635	-17,170	-505
Change in accumulated other comprehensive loss	-776	-776	'	-1,060	-58	-1,118	342
Other, net	'	2,248	'	1,555	386	1,941	307
Net income (loss)	'	231,402	'	207,290	11,639	218,929	12,473
Distributions to noncontrolling interests	-59,946	-52,304	'	'	'	'	-52,304
Distributions to common unitholders	'	-147,694	'	-140,052	-7,642	-147,694	'
Distributions to preferred unitholders	'	-2,804	'	-2,804	'	-2,804	'
Partners' Capital at Dec. 31, 2013	'	$1,172,744	$68,114	$899,343	($27,721)	$939,736	$233,008

Organization

Organization	12 Months Ended
Organization	Dec. 31, 2013
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, management and redevelopment of quality apartment communities located in the largest coastal and job growth markets of the United States.
	Aimco, 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 partnership unit equivalents. At December 31, 2013, after eliminations for units held by consolidated subsidiaries, the Aimco Operating Partnership had 153,837,804 common partnership units and equivalents outstanding. At December 31, 2013, Aimco owned 145,917,387 of the common partnership units (94.9% 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 December 31, 2013, we owned an equity interest in 162 conventional apartment communities with 50,486 apartment homes and 74 affordable apartment communities with 10,067 apartment homes. Of these properties, we consolidated 158 conventional apartment communities with 50,344 apartment homes and 58 affordable apartment communities with 8,953 apartment homes. These conventional and affordable apartment communities generated 90% and 10%, respectively, of our proportionate property net operating income (as defined in Note 15) during the year ended December 31, 2013.

Basis_of_Presentation_and_Summ

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
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
	Principles of Consolidation
	Aimco’s accompanying consolidated financial statements include the accounts of Aimco, the Aimco Operating Partnership, and their consolidated subsidiaries. The Aimco Operating Partnership’s 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 December 31, 2013, we were the primary beneficiary of, and therefore consolidated, 63 VIEs, which owned 49 apartment communities with 7,656 apartment homes. Substantially all of these VIEs are partnerships that operate 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 net book value of $392.2 million collateralized $355.4 million of debt of those VIEs. Any significant amounts of assets and liabilities related to our consolidated VIEs are identified parenthetically on our accompanying consolidated balance sheets. The creditors of the consolidated VIEs do not have recourse to our general credit.
	In addition to the VIEs discussed above, at December 31, 2013, 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 3. 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 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.
	As used herein, and except where the context otherwise requires, “partnership” refers to a limited partnership or a limited liability company and “partner” refers to a partner in a limited partnership or a member of a limited liability company.
	Acquisition of Real Estate Assets and Related Depreciation and Amortization
	We recognize at fair value the acquisition of apartment communities or interests in partnerships that own apartment communities if the transaction results in consolidation and we expense as incurred most related transaction costs. We allocate the cost of acquired apartment communities to tangible assets and identified intangible assets based on their fair values. We determine the fair value of tangible assets, such as land, building, furniture, fixtures and equipment, generally using internal valuation techniques that consider comparable market transactions, discounted cash flow techniques, replacement costs and other available information. We determine the fair value of identified intangible assets (or liabilities), which typically relate to in-place leases, using internal valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, and our experience in leasing similar communities. The intangible assets or liabilities related to in-place leases are comprised of:

	1	The value of the above- and below-market leases in-place. An asset or liability is recognized based on the difference between (a) the contractual amounts to be paid pursuant to the in-place leases and (b) our estimate of fair market lease rates for the corresponding in-place leases, measured over the period, including estimated lease renewals for below-market leases, that the leases are expected to remain in effect.

	2	The estimated unamortized portion of avoided leasing commissions and other costs that ordinarily would be incurred to originate the in-place leases.

	3	The value associated with vacant apartment homes during the absorption period (estimates of lost rental revenue during the expected lease-up periods based on current market demand and stabilized occupancy levels).
	The values of the above- and below-market leases are amortized to rental revenue over the expected remaining terms of the associated leases, which include reasonably assured renewal periods. Other intangible assets related to in-place leases are amortized to depreciation and amortization over the expected remaining terms of the associated leases. We prospectively adjust the amortization period to reflect significant variances between actual lease termination activity as compared to those used to determine the historical amortization periods.
	Depreciation for all tangible real estate assets is calculated using the straight-line method over their estimated useful lives. Acquired buildings and improvements are depreciated over a useful life based on the age, condition and other physical characteristics of the apartment community. At December 31, 2013, the weighted average depreciable life of our acquired buildings and improvements was approximately 30 years. As discussed below under the Impairment of Long Lived Assets heading, we may adjust depreciation of apartment communities that are expected to be disposed of or demolished prior to the end of their useful lives. Furniture, fixtures and equipment associated with acquired apartment communities are depreciated over five years.
	At December 31, 2013 and 2012, deferred income in our consolidated balance sheets includes below-market lease amounts totaling $16.9 million and $19.8 million, respectively, which are net of accumulated amortization of $35.9 million and $33.0 million, respectively. During the years ended December 31, 2013, 2012 and 2011, we included amortization of below-market leases of $2.9 million, $3.8 million and $4.3 million, respectively, in rental and other property revenues in our consolidated statements of operations. At December 31, 2013, our below-market leases had a weighted average amortization period of 6.5 years and estimated aggregate amortization for each of the five succeeding years as follows (in thousands):


			2014			2015		2016		2017		2018
	Estimated amortization		$	2,270		$	2,016	$	1,757	$	1,550	$	1,331
	Estimated amortization		$	2,270		$	2,016	$	1,757	$	1,550	$	1,331
	Capital Additions and Related Depreciation
	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 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.
	We depreciate capitalized costs using the straight-line method over the estimated useful life of the related component or improvement, which is generally 5, 15 or 30 years. All capitalized site payroll and indirect costs are allocated proportionately, based on direct costs, among capital projects and depreciated over the estimated useful lives of such projects.
	Certain homogeneous items that are purchased in bulk on a recurring basis, such as carpeting and appliances, are depreciated using group methods that reflect the average estimated useful life of the items in each group. Except in the case of apartment community casualties, where the net book value of the lost asset is written off in the determination of casualty gains or losses, we generally do not recognize any loss in connection with the replacement of an existing apartment community component because normal replacements are considered in determining the estimated useful lives used in connection with our composite and group depreciation methods.
	For the years ended December 31, 2013, 2012 and 2011, for continuing and discontinued operations, we capitalized to buildings and improvements $17.6 million, $16.6 million and $14.0 million of interest costs, respectively, and $33.2 million, $33.7 million and $29.0 million of other direct and indirect costs, respectively.
	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 aggregate undiscounted future cash flows, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the apartment property.
	Based on periodic tests of recoverability of long-lived assets, for the year ended December 31, 2012, we recorded a provision for real estate impairment losses of $6.2 million related to apartment communities classified as held for use, and we recorded no such provisions during the years ended December 31, 2013 or 2011.
	Discontinued Operations
	We classify certain apartment communities and related assets and liabilities as held for sale when they meet certain criteria, as defined in GAAP. The operating results of such apartment communities as well as those communities sold during the periods presented are included in discontinued operations in both current periods and all comparable periods presented. Depreciation is not recorded on apartment communities once they have been classified as held for sale; however, depreciation expense recorded prior to classification as held for sale is included in discontinued operations. The net gain on sale and any impairment losses are presented in discontinued operations when recognized. See Note 12 for additional information regarding discontinued operations.
	Cash Equivalents
	We classify highly liquid investments with an original maturity of three months or less as cash equivalents.
	Restricted Cash
	Restricted cash includes capital replacement reserves, completion repair reserves, bond sinking fund amounts, tax and insurance escrow accounts held by lenders and resident security deposits.
	Notes Receivable
	At December 31, 2012, our notes receivable were primarily comprised of second mortgages collateralized by apartment communities in New York City, which, as further described in Note 3, were repaid during 2013.
	Other Assets
	At December 31, 2013 and 2012, other assets was comprised of the following amounts (dollars in thousands):


		2013			2012
	Deferred financing costs, net	$	36,641		$	37,312
	Deferred financing costs, net	$	36,641		$	37,312
	Investments in unconsolidated real estate partnerships	16,930			18,753
	Investments in unconsolidated real estate partnerships	16,930			18,753
	Investments in securitization trust that holds Aimco property debt	58,408			59,145
		58,408			59,145
	Intangible assets, net	50,025			50,322
	Intangible assets, net	50,025			50,322
	Deferred tax asset, net (Note 8)	30,353			44,828
	Deferred tax asset, net (Note 8)	30,353			44,828
	Assets related to the legacy asset management business (Note 3)	163,849			176,756
		163,849			176,756
	Prepaid expenses, accounts receivable, deposits and other	146,065			156,662
	Prepaid expenses, accounts receivable, deposits and other	146,065			156,662
	Other assets per consolidated balance sheets	$	502,271		$	543,778
	Other assets per consolidated balance sheets	$	502,271		$	543,778
	Deferred Costs
We defer lender fees and other direct costs incurred in obtaining new financing and amortize the amounts over the terms of the related loan agreements. Amortization of these costs is included in interest expense.
We defer leasing commissions and other direct costs incurred in connection with successful leasing efforts and amortize the costs over the terms of the related leases. Amortization of these costs is included in depreciation and amortization.
Investments in Unconsolidated Real Estate Partnerships
We own general and limited partner interests in partnerships that either directly, or through interests in other real estate partnerships, own apartment communities. We generally account for investments in real estate partnerships that we do not consolidate under the equity method. Under the equity method, our share of the earnings or losses of the entity for the periods being presented is included in equity in earnings or losses from unconsolidated real estate partnerships, inclusive of our share of any impairments and disposition gains recognized by and related to such entities.
The excess of the cost of the acquired partnership interests over the historical carrying amount of partners’ equity or deficit is ascribed generally to the fair values of land and buildings owned by the partnerships. We amortize the excess cost related to the buildings over the estimated useful lives of the buildings. Such amortization is recorded as a component of equity in earnings (losses) of unconsolidated real estate partnerships.
Investments in Securitization Trust that Holds Aimco Property Debt
We hold an investment in the first loss and mezzanine positions in a securitization trust which primarily holds certain of our property debt. These investments were initially recognized at their purchase price and the discount to the face value is being accreted into interest income over the expected term of the securities. We have designated these investments as available for sale securities and we measure these investments at fair value with changes in their fair value, other than the changes attributed to the accretion described above, recognized as an adjustment of accumulated other comprehensive income or loss within equity and partners’ capital. Refer to Note 6 for further information regarding these securities.
Intangible Assets
At December 31, 2013 and 2012, other assets included goodwill associated with our reportable segments of $49.0 million, and at December 31, 2012 assets held for sale included $5.5 million of goodwill allocated to apartment communities sold during 2013. We perform an annual impairment test of goodwill that compares the fair value of reporting units with their carrying amounts, including goodwill. We determined that our goodwill was not impaired in 2013, 2012 or 2011.
During the years ended December 31, 2013, 2012 and 2011, we allocated $5.5 million, $7.5 million and $5.1 million, respectively, of goodwill related to our reportable segments (conventional and affordable real estate operations) to the carrying amounts of the apartment communities sold or classified as held for sale. The amounts of goodwill allocated to these apartment communities were based on the relative fair values of the apartment communities sold or classified as held for sale and the retained portions of the reporting units to which the goodwill as allocated.
Intangible assets also includes amounts related to in-place leases as discussed under the Acquisition of Real Estate Assets and Related Depreciation and Amortization heading.
Capitalized Software Costs
Purchased software and other costs related to software developed for internal use are capitalized during the application development stage and are amortized using the straight-line method over the estimated useful life of the software, generally five years. For the years ended December 31, 2013, 2012 and 2011, we capitalized software purchase and development costs totaling $3.3 million, $5.8 million and $12.6 million, respectively. At December 31, 2013 and 2012, other assets included $22.0 million and $27.5 million of net capitalized software, respectively. During the years ended December 31, 2013, 2012 and 2011, we recognized amortization of capitalized software of $8.9 million, $10.0 million and $8.7 million, respectively, which is included in depreciation and amortization in our consolidated statements of operations.
Noncontrolling Interests in Consolidated Real Estate Partnerships
We report the unaffiliated partners’ interests in the net assets of our consolidated real estate partnerships as noncontrolling interests in consolidated real estate partnerships within consolidated equity and partners’ capital. Noncontrolling interests in consolidated real estate partnerships consist primarily of equity interests held by limited partners in consolidated real estate partnerships that have finite lives. We generally attribute to noncontrolling interests their share of income or loss of consolidated partnerships based on their proportionate interest in the results of operations of the partnerships, including their share of losses even if such attribution results in a deficit noncontrolling interest balance within our equity and partners’ capital accounts.
The terms of the related partnership agreements generally require the partnerships to be liquidated following the sale of the underlying real estate. As the general partner in these partnerships, we ordinarily control the execution of real estate sales and other events that could lead to the liquidation, redemption or other settlement of noncontrolling interests. However, as discussed in Note 3, we continue to consolidate certain partnerships and apartment communities associated with the legacy asset management business for which the derecognition criteria associated with our sale of the portfolio have not been met. We do not control the execution of sales and other events related to the assets that will lead to the to the liquidation of these partnerships and derecognition of the associated noncontrolling interests. The aggregate carrying amount of noncontrolling interests in consolidated real estate partnerships totaled $233.0 million and $271.1 million at December 31, 2013 and 2012, respectively, of which $35.8 million and $57.2 million, respectively, was associated with noncontrolling interests in the legacy asset management business.
Changes in our ownership interest in consolidated real estate partnerships generally consist of our purchase of an additional interest in or the sale of our entire interest in a consolidated real estate partnership. The effect on our equity and partners’ capital of our purchase of additional interests in consolidated real estate partnerships during the years ended December 31, 2013, 2012 and 2011 is shown in our consolidated statements of equity and partners’ capital and further discussed in Note 3. The effect on our equity and partners' capital of sales of consolidated real estate or sales of our entire interest in consolidated real estate partnerships is reflected in our consolidated financial statements as sales of real estate and accordingly the effect on our equity and partners’ capital is reflected within the the amount of net income attributable to us and to noncontrolling interests. In accordance with FASB Accounting Standards Codification, or ASC, Topic 810, upon our deconsolidation of a real estate partnership following the sale of our partnership interests or liquidation of the partnership following sale of the related apartment community, we derecognize any remaining noncontrolling interest of the associated partnership previously recorded in our consolidated balance sheet.
Noncontrolling Interests in Aimco Operating Partnership
Noncontrolling interests in Aimco Operating Partnership consist of common OP Units, HPUs and preferred OP Units. Within Aimco’s consolidated financial statements, the Aimco Operating Partnership’s income or loss is allocated to the holders of common partnership units and equivalents based on the weighted average number of common partnership units (including those held by Aimco) and equivalents outstanding during the period. During the years ended December 31, 2013, 2012 and 2011, the holders of common OP Units and equivalents had a weighted average ownership interest in the Aimco Operating Partnership of 5.2%, 5.7% and 6.6%, respectively. Holders of the preferred OP Units participate in the Aimco Operating Partnership’s income or loss only to the extent of their preferred distributions. See Note 10 for further information regarding the items comprising noncontrolling interests in the Aimco Operating Partnership.
Revenue Recognition
Our apartment communities have operating leases with apartment residents with terms averaging 12 months. We recognize rental revenue related to these leases, net of any concessions, on a straight-line basis over the term of the lease. We recognize revenues from property management, asset management, syndication and other services when the related fees are earned and are realized or realizable.
Insurance
We believe that our insurance coverages insure our apartment communities adequately against the risk of loss attributable to fire, earthquake, hurricane, tornado, flood, and other perils. In addition, we have insurance coverage for substantial portions of our property, workers’ compensation, health, and general liability exposures. Losses are accrued based upon our estimates of the aggregate liability for uninsured losses incurred using certain actuarial assumptions followed in the insurance industry and based on our experience.
Share-Based Compensation
We recognize all share-based employee compensation, including grants of employee stock options, in the consolidated financial statements based on the grant date fair value and recognize compensation cost, net of forfeitures, ratably over the awards’ requisite service period. See Note 11 for further discussion of our share-based compensation.
Tax Credit Arrangements
We sponsor certain 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. The tax credits are generally realized ratably over the first ten years of the tax credit arrangement and are subject to the partnership’s compliance with applicable laws and regulations for a period of 15 years. Typically, we are the general partner with a legal ownership interest of one percent or less and unaffiliated institutional investors (which we refer to as tax credit investors or investors) acquire the limited partnership interests (at least 99%). At inception, each investor agrees to fund capital contributions to the partnerships and we receive a syndication fee from the partnerships upon the investors’ admission to the partnership.
We have determined that the partnerships in these arrangements are VIEs and, where we are general partner, we are generally the primary beneficiary that is required to consolidate the partnerships. When the contractual arrangements obligate us to deliver tax benefits to the investors, and entitle us through fee arrangements to receive substantially all available cash flow from the partnerships, we account for these partnerships as wholly-owned subsidiaries, recognizing the income or loss generated by the underlying real estate based on our economic interest in the partnerships. Capital contributions received by the partnerships from tax credit investors represent, in substance, consideration that we receive in exchange for our obligation to deliver tax credits and other tax benefits to the investors. We record these contributions as deferred income in our consolidated balance sheet upon receipt, and we recognize the receipts as revenue in our consolidated statements of operations when our obligation to the investors is relieved upon delivery of the tax benefits.
Income Taxes
We have elected to be taxed as a REIT under the Code commencing with our taxable year ended December 31, 1994, and intend to continue to operate in such a manner. Our current and continuing qualification as a REIT depends on our ability to meet the various requirements imposed by the Code, which are related to organizational structure, distribution levels, diversity of stock ownership and certain restrictions with regard to owned assets and categories of income. If we qualify for taxation as a REIT, we will generally not be subject to United States Federal corporate income tax on our taxable income that is currently distributed to stockholders. This treatment substantially eliminates the “double taxation” (at the corporate and stockholder levels) that generally results from an investment in a corporation.
Even if we qualify as a REIT, we may be subject to United States Federal income and excise taxes in various situations, such as on our undistributed income. We also will be required to pay a 100% tax on any net income on non-arm’s length transactions between us and a TRS (described below) and on any net income from sales of apartment communities that were held for sale to customers in the ordinary course. In addition, we could also be subject to the alternative minimum tax, or AMT, on our items of tax preference. The state and local tax laws may not conform to the United States Federal income tax treatment, and we and our stockholders may be subject to state or local taxation in various state or local jurisdictions, including those in which we transact business or our stockholders reside. Any taxes imposed on us reduce our operating cash flow and net income.
Certain of our operations or a portion thereof, including property management, asset management and risk management, are conducted through taxable REIT subsidiaries, which are subsidiaries of the Aimco Operating Partnership, and each of which we refer to as a TRS. A TRS is a subsidiary C-corporation that has not elected REIT status and as such is subject to United States Federal corporate income tax. We use TRS entities to facilitate our ability to offer certain services and activities to our residents and investment partners that cannot be offered directly by a REIT. We also use TRS entities to hold investments in certain apartment communities.
For our TRS entities, deferred income taxes result from temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for Federal income tax purposes, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences reverse. We reduce deferred tax assets by recording a valuation allowance when we determine based on available evidence that it is more likely than not that the assets will not be realized. We recognize the tax consequences associated with intercompany transfers between the REIT and TRS entities when the related assets are sold to third parties, impaired or otherwise disposed of for financial reporting purposes. Refer to Note 8 for further information about our income taxes.
Comprehensive Income or Loss
As discussed under the preceding Investments in Available for Sale Securities heading, we have investments that are measured at fair value with unrealized gains or losses recognized as an adjustment of accumulated other comprehensive loss within equity and partners’ capital. Additionally, as discussed in Note 6, we recognize changes in the fair value of our cash flow hedges as an adjustment of accumulated other comprehensive loss within equity and partners’ capital. The amounts of consolidated comprehensive income or loss for the years ended December 31, 2013, 2012 and 2011, along with the corresponding amounts of such comprehensive income or loss attributable to Aimco, the Aimco Operating Partnership and to noncontrolling interests, is presented within the accompanying consolidated statements of comprehensive income or loss.
Earnings per Share and Unit
Aimco calculates earnings (loss) 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 Aimco Operating Partnership calculates earnings (loss) 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 partnership units and HPUs, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit computations. See Note 13 for further information regarding earnings per share and unit computations.
Use of Estimates
The preparation of our 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.
Reclassifications and Adjustments
Certain items included in the 2012 and 2011 financial statements have been reclassified to conform to the current presentation, including adjustments for discontinued operations.

Significant_Transactions

Significant Transactions	12 Months Ended
	Dec. 31, 2013
Investments in Real Estate and Other Significant Transactions [Abstract]	'
Investments in Real Estate and Other Significant Transactions	'
	Significant Transactions
	West Harlem Property Loans
	In 2006, we funded $100.1 million of second mortgage loans related to 84 apartment communities containing 1,596 apartment homes and 43 commercial spaces in the West Harlem neighborhood of New York City. We concurrently entered into an agreement with the borrower under which we had the right to purchase the apartment communities and the borrower had the right to require us to purchase the communities upon achievement of certain revenue thresholds. At December 31, 2012, the aggregate carrying amount of these second mortgage loans and the purchase option totaled $110.5 million, and were included in notes receivable and other assets, respectively, in our consolidated balance sheets.
	Midway through the year ended December 31, 2013, we purchased at par first mortgage loans secured by the same 84 apartment communities for $119.1 million, the majority of which matured on June 1, 2013. Later in 2013, in accordance with the terms agreed upon when we acquired the first mortgage loans, the borrower repaid for $229.8 million the full amounts due under the first and second mortgage loans, as well as the recognized value of our unexercised option to acquire the apartment communities.
	Asset Management Business Disposition
	On December 19, 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 the next five years. The notes will be repaid from the operation and liquidation of the Napico 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. Under this 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. During the year ended December 31, 2013, we received the first cash payment required under the seller-financed notes.
	At December 31, 2013, the Napico portfolio consisted of 17 partnerships that held investments in 14 apartment communities that were consolidated and 61 apartment communities that were accounted for under the equity or cost method of accounting. The portfolio’s assets and liabilities included in other assets in our consolidated balance sheets are summarized below (in thousands).


		December 31,
		2013				2012
	Real estate, net	$	120,175			$	125,065

	Cash and cash equivalents and restricted cash	29,046				31,558

	Investment in unconsolidated real estate partnerships	10,817				15,987

	Other assets	3,811				4,146

	Total assets	$	163,849			$	176,756


	Total indebtedness	$	106,032			$	107,562

	Accrued and other liabilities	19,263				29,422

	Total liabilities	125,295				136,984


	Noncontrolling interests in consolidated real estate partnerships	35,818				57,208

	Equity attributable to Aimco and the Aimco Operating Partnership	2,736				(17,436		)

	Total liabilities and equity	$	163,849			$	176,756

	Summarized information regarding the Napico portfolio’s results of operations for the year ended December 31, 2013, including any expense we recognize under the profit sharing method, is shown below (in thousands). The net income (before noncontrolling interests) related to Napico is included in gain on dispositions of unconsolidated real estate and other, net, in our consolidated statement of operations.


		2013
	Revenues	$	23,711

	Expenses	(21,188		)
	Equity in earnings or loss of unconsolidated entities, gains or losses on dispositions and other, net	(748		)
	Net income related to legacy asset management business	1,775

	Income tax expense associated with legacy asset management business	(639		)
	Noncontrolling interests in consolidated real estate partnerships	21,370

	Net income of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$	22,506

	The assets and liabilities related to consolidated apartment communities sold by the owner of this portfolio through December 31, 2013, have been classified within assets held for sale or liabilities related to assets held for sale, and the results of their operations are presented within income from discontinued operations in our consolidated statement of operations and are excluded from the summaries above.
	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 or partners’ capital. Additionally, the operating results of this portfolio generally have an insignificant effect on the amounts of income or loss attributable us, except as it relates to the consolidated partnerships within this portfolio that sell their final investments and commence dissolution, which results in the derecognition of all remaining noncontrolling interest balances associated with these partnerships. During 2013, noncontrolling interests in consolidated real estate partnerships reflects a benefit of $20.6 million to Aimco and the Aimco Operating Partnership's share of net income for the derecognition of such noncontrolling interest balances.
	We consolidated the majority of these entities in connection with our adoption of a new accounting principle in 2010, and at that time recognized a large cumulative effect of a change in accounting principal charge to our equity and partners' capital. This adjustment represented the cumulative charges to earnings we would have recognized for any distributions or losses allocable to noncontrolling interests in excess of the carrying amount of the associated noncontrolling interest balances had we consolidated these entities from the period of our initial involvement.
	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.
	Acquisitions of Apartment Communities
	During the year ended December 31, 2013, we acquired conventional apartment communities located in La Jolla, CA, Atlanta, GA, and Boston, MA, and during the year ended December 31, 2012, we acquired conventional apartment communities located in San Diego, CA, Manhattan, NY, and Phoenix, AZ. Summarized information regarding these acquisitions is set forth in the table below (dollars in thousands):


		Year Ended December 31,
		2013				2012
	Number of apartment homes	134				614

Acquisition price	$	53,575			$	126,873

Non-recourse property debt assumed (outstanding principal balance)	12,446				38,819

Non-recourse property debt assumed (fair value)	14,767				43,938

Total fair value allocated to real estate	55,896				130,547

During the year ended December 31, 2011, we acquired a vacant apartment community with 126 apartment homes, located in Marin County, north of San Francisco, California. We are redeveloping this apartment community and expect our total investment in this apartment community to approximate $101 million at its completion in the second half of 2014. During the year ended December 31, 2011, we also acquired noncontrolling interests (approximately 50%) in entities that own four contiguous apartment communities with 142 apartment homes located in La Jolla, California.
Acquisitions of Noncontrolling Interests in Consolidated Real Estate Partnerships
As set forth in the table below (dollars in thousands), during the years ended December 31, 2013, 2012 and 2011, we acquired the remaining noncontrolling limited partner interests in certain consolidated real estate partnerships in which our affiliates serve as the general partner.


	Year Ended December 31,
	2013				2012				2011
Consolidated partnerships in which remaining limited partnership interests were acquired	3				11				12

Number of apartment communities owned by partnerships	5				17				15

Cost of limited partnership interests acquired	$	17,900			$	50,654			$	22,305

Excess of consideration paid over the carrying amount of noncontrolling interests acquired	17,170				44,777				36,260


In connection with these acquisitions, the Aimco Operating Partnership recognized the excess of the consideration paid over the carrying amounts of the noncontrolling interests acquired as an adjustment of additional paid-in capital within partners’ capital (which is included in effects of changes in ownership for consolidated entities in the Aimco Operating Partnership’s consolidated statements of partners’ capital). This amount is allocated between Aimco and noncontrolling interests in the Aimco Operating Partnership within Aimco’s consolidated statements of equity.
Disposition of Interests in Unconsolidated Real Estate and Other
During the year ended December 31, 2013, the amounts included in gain on dispositions of unconsolidated real estate and other in our consolidated statement of operations primarily related to the legacy asset management business. During the years ended December 31, 2012 and 2011, we recognized $21.9 million and $2.4 million, respectively, in net gains on disposition of interests in unconsolidated real estate. Approximately $15.7 million of the gains recognized during 2012 related to the sale of our interests in two unconsolidated real estate partnerships. The majority of the remainder of the gains recognized in 2012 and substantially all the gains recognized in 2011 related to partnership interests held through the legacy asset management business, in which we had an insignificant economic interest. Accordingly, these gains related to the legacy asset management business were attributed to noncontrolling interests and had no significant effect on the amounts of income or loss attributable to Aimco or the Aimco Operating Partnership during the years ended December 31, 2012 and 2011.

Investments_in_Unconsolidated_

Investments in Unconsolidated Real Estate Partnerships	12 Months Ended
	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Investments in Unconsolidated Real Estate Partnerships	'
	Investments in Unconsolidated Real Estate Partnerships
	At December 31, 2013, 2012 and 2011, we owned general and limited partner interests in unconsolidated real estate partnerships that owned 20, 22 and 123 apartment communities, respectively. We acquired these interests through various transactions, including large portfolio acquisitions and offers to individual limited partners. At December 31, 2013, our ownership interests in these unconsolidated real estate partnerships ranged from 5% to 67%.
	The following table provides selected combined financial information for the unconsolidated real estate partnerships in which we had investments accounted for under the equity method as of and for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013			2012			2011
	Real estate, net of accumulated depreciation	$	88,014		$	107,419		$	429,780

	Total assets	93,242			114,658			472,904

	Non-recourse property debt and other notes payable	60,660			122,019			321,236

	Total liabilities	64,859			132,767			455,591

	Partners’ capital (deficit)	28,383			(18,109		)	17,313

	Rental and other property revenues	16,268			72,636			114,974

	Property operating expenses	(8,470		)	(49,331		)	(75,934		)
	Depreciation and amortization	(3,300		)	(18,388		)	(26,323		)
	Interest expense	(4,185		)	(21,354		)	(27,108		)
	Gain on sale and impairment losses, net	36,212			(4,140		)	22,598

	Net income (loss)	35,909			(21,108		)	6,773

	The decrease in the number of unconsolidated apartment communities from 2011 to 2012 was primarily attributed to the sale in December 2012 of the legacy asset management business. Based on the timing of the sale, the results of operations of the unconsolidated apartment communities in this portfolio are included in the table above for 2012 and 2011. Based on our insignificant economic ownership in the legacy asset management business, substantially all of the net equity and results of operations related to the legacy asset management business were attributed to the associated noncontrolling interests.
	At December 31, 2013 and 2012, our aggregate recorded investment in unconsolidated partnerships of $16.9 million and $18.7 million, respectively, exceeded our share of the partners’ capital or deficit recognized in the underlying partnerships' financial statements by approximately $1.1 million and $6.9 million, respectively.

NonRecourse_Property_Debt_and_

Non-Recourse Property Debt and Credit Agreement	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Non-Recourse Property Debt and Credit Agreement	'
	Non-Recourse Property Debt and Credit Agreement
	Non-Recourse Property Debt
	We finance our apartment communities primarily using long-dated, fixed-rate borrowings, each of which is collateralized by a single apartment community and is non-recourse to us. The following table summarizes our property debt related to assets classified as held for use at December 31, 2013 and 2012 (dollars in thousands):


		Weighted Average Interest Rate		Principal
				Outstanding
		2013		2013				2012
	Fixed rate property debt	5.46%		$	4,107,141			$	4,181,821

	Variable rate property debt	2.92%		13,099				13,443

	Total			$	4,120,240			$	4,195,264

	Fixed rate property debt matures at various dates through January 2055. The variable rate property debt matures January 2016. Principal and interest are generally payable monthly or in monthly interest-only payments with balloon payments due at maturity. At December 31, 2013, each of our property debt instruments related to apartment communities classified as held for use were secured by one of 186 apartment communities that had an aggregate gross book value of $7,251.1 million.
	The following table summarizes our property tax-exempt bond financings related to assets classified as held for use at December 31, 2013 and 2012 (dollars in thousands):


		Weighted Average Interest Rate		Principal
				Outstanding
		2013		2013				2012
	Fixed rate property tax-exempt debt	4.87%		$	85,634			$	87,220

	Variable rate property tax-exempt debt	1.09%		131,911				130,599

	Total			$	217,545			$	217,819

	Fixed rate property tax-exempt debt matures at various dates through February 2061. Variable rate property tax-exempt debt matures at various dates through July 2033. Principal and interest on these bonds are generally payable in semi-annual installments with balloon payments due at maturity. Certain of our property tax-exempt bonds at December 31, 2013, are remarketed periodically by a remarketing agent to maintain a variable yield. If the remarketing agent is unable to remarket the bonds, then the remarketing agent may require us to purchase the bonds. We believe that the likelihood of this occurring is remote. At December 31, 2013, our property tax-exempt bonds related to apartment communities classified as held for use were each secured by one of 20 apartment communities that had an aggregate gross book value of $514.2 million.
	Our non-recourse property debt instruments contain covenants common to the type of borrowing, and at December 31, 2013, we were in compliance with all such covenants.
	As of December 31, 2013, the scheduled principal amortization and maturity payments for our non-recourse property debt related to apartment communities in continuing operations are as follows (in thousands):


		Amortization				Maturities				Total
	2014	$	88,010			$	82,192			$	170,202

	2015	88,424				183,317				271,741

	2016	85,380				465,321				550,701

	2017	79,223				398,320				477,543

	2018	74,232				238,253				312,485

	Thereafter									2,555,113

										$	4,337,785

	Although the majority of our apartment communities are encumbered by property debt, as of December 31, 2013, we had seven unencumbered consolidated apartment communities, which we expect to hold beyond 2014, with an estimated fair value of approximately $380.0 million.
	Credit Agreement
	We have a Senior Secured Credit Agreement with a syndicate of financial institutions, which we refer to as the Credit Agreement. Our Credit Agreement provides for $600.0 million of revolving loan commitments. Borrowings under the Credit Agreement bear interest at a rate set forth on a pricing grid, which rate varies based on our leverage (initially either at LIBOR, plus 1.875%, or, at our option, Prime plus 0.5%). The Credit Agreement matures in September 2017, and may be extended for an additional one-year period, subject to certain conditions.
	As of December 31, 2013, we had $50.4 million of outstanding borrowings under our Credit Agreement, and we had the capacity to borrow $505.0 million, net of the outstanding borrowings and $44.6 million for undrawn letters of credit backed by the Credit Agreement. The interest rate on our outstanding borrowings was 3.75% at December 31, 2013. We had no outstanding borrowings under the Credit Agreement as of December 31, 2012. The proceeds of revolving loans are generally used for working capital and other short-term purposes.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	In accordance with GAAP, we are required to measure certain assets and liabilities in our consolidated financial statements at fair value. We are required to classify fair value measurements into one of three categories, based on the nature of the inputs used in the fair value measurement. Level 1 of the hierarchy includes fair value measurements based on unadjusted quoted prices in active markets for identical assets or liabilities we can access at the measurement date. Level 2 includes fair value measurements based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 includes fair value measurements based on unobservable inputs. The classification of fair value measurements is subjective and GAAP requires disclosure of more detailed information regarding fair value measurements classified within the lower levels of the hierarchy.
	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 (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 fair value hierarchy, is presented below (in thousands):


		AFS Investments			Interest Rate Swaps			Total
	Fair value at December 31, 2011	$	51,693		$	(7,012	)	$	44,681

	Investment accretion	3,111			—			3,111

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,673			1,673

	Unrealized gains (losses) included in equity and partners’ capital	4,341			(2,581		)	1,760

	Fair value at December 31, 2012	$	59,145		$	(7,968	)	$	51,177

	Investment accretion	3,451			—			3,451

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,678			1,678

	Unrealized (losses) gains included in equity and partners’ capital	(4,188		)	1,734			(2,454		)

	Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804

	Our investments classified as AFS are presented within other assets in the accompanying consolidated balance sheets. We estimate the fair value of these investments 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. 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 December 31, 2013, was approximately 7.4 years. Our amortized cost basis for these investments, which represents the original cost adjusted for interest accretion less interest payments received, was $59.8 million and $56.3 million at December 31, 2013 and 2012, respectively. The amortized cost exceeded the fair value of these investments at December 31, 2013, primarily due to increases in market interest rates and a decrease in demand for similar investments as compared to when we purchased the investments. We currently expect to hold 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 these investments is temporary and we have not recognized any of the loss 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 December 31, 2013 and 2012, we had interest rate swaps with aggregate notional amounts of $50.7 million and $51.0 million, respectively. As of December 31, 2013 these swaps had a weighted average remaining term of 7.0 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 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 December 31, 2013 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.
	Nonrecurring Fair Value Measurements
	During the year ended December 31, 2012, we reduced the aggregate carrying amounts of nine assets classified as held for use or held for sale from $81.8 million to their estimated fair values of $65.8 million, resulting in impairment losses of $16.0 million. During the year ended December 31, 2011, we reduced the aggregate carrying amounts of 19 assets classified as held for sale from $108.2 million to their estimated fair values of $92.3 million, resulting in impairment losses of $15.9 million.
	The fair values for the apartment communities we impaired during these periods were based primarily on contract prices for pending sales or expected sales values of the apartment communities. The contract prices were based in part on unobservable inputs classified within Level 3 of the fair value hierarchy, but were also based on observable inputs that can be validated to observable external sources, such as pricing information about widely marketed apartment communities for sale.
	The unobservable inputs that are significant to our estimation of the fair value of real estate impaired during the periods include, among other things, information such as the property’s net operating income, or NOI, free cash flow, or FCF, which represents the property’s NOI less capital spending required to maintain the condition of the apartment community, and assumptions about NOI and FCF growth rates and exit values. An FCF internal rate of return, which represents the rate of return generated by the FCF from the apartment community and the proceeds from its eventual sale, is a common benchmark used in the real estate industry for relative comparison of real estate valuations. The projected cash flows, including the expected sales prices, on which the impairment losses were based translated to weighted average implied FCF internal rates of return of 7.39% and 7.87% for the apartment communities impaired during the years ended December 31, 2012 and 2011, respectively.
	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 December 31, 2013 and 2012, due to their relatively short-term nature and high probability of realization. The estimated aggregate fair value of our consolidated debt (including outstanding borrowings under our Credit Agreement and amounts reported in liabilities related to assets held for sale) was approximately $4.5 billion and $5.1 billion at December 31, 2013 and 2012, respectively, as compared to aggregate carrying amounts of $4.4 billion and $4.7 billion, respectively. 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 valuation hierarchy based on the significance of certain of the unobservable inputs used to estimate their fair values.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Commitments
	In connection with our redevelopment and capital improvement activities, we have entered into various construction related contracts with commitments totaling approximately $82.6 million, which we expect to incur during the next 12 months. Pursuant to financing arrangements on our Lincoln Place, Pacific Bay Vistas and The Preserve at Marin apartment communities, we are contractually obligated to complete the planned projects. Additionally, we 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.
	Additionally, during September 2013, we entered into an agreement with a third-party developer to construct a 12-story apartment community in Boston, Massachusetts. Pursuant to this agreement, we expect to invest approximately $190 million over the next two and one-half years (approximately $147 million of which is committed) to build 310 luxury apartment homes and approximately 22,000 square feet of commercial space. The site is leased from the Massachusetts Department of Transportation under a 99-year ground lease for a total ground rent of $13.0 million, which we paid at the lease’s commencement. Pursuant to the lease agreement and financing related to the project, we have provided certain guarantees to complete the project.
	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 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 12 years. We do not anticipate that any material refunds or reductions of investor capital contributions will be required in connection with these arrangements.
	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 present on an apartment community, including lead-based paint, asbestos, polychlorinated biphenyls, petroleum-based fuels, and other miscellaneous materials. Such laws often impose liability without regard to whether the owner or operator knew of, or was responsible for, the release or presence of such materials. The presence of, or the failure to manage or remedy properly, these materials may adversely affect occupancy at affected apartment communities and the ability to sell or finance affected apartment communities. In addition to the costs associated with investigation and remediation actions brought by government agencies, and potential fines or penalties imposed by such agencies in connection therewith, the improper management of these materials on an apartment community could result in claims by private plaintiffs for personal injury, disease, disability or other infirmities. Various laws also impose liability for the cost of removal, remediation or disposal of these materials through a licensed disposal or treatment facility. Anyone who arranges for the disposal or treatment of these materials is potentially liable under such laws for the proper operation of the disposal facility. These laws often impose liability whether or not the person arranging for the disposal ever owned or operated the disposal facility. In connection with the ownership, operation and management of apartment communities, we could potentially be responsible for environmental liabilities or costs associated with our apartment communities or communities we acquire or manage in the future.
	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 December 31, 2013, are immaterial to our consolidated financial condition, results of operations and cash flows.
	Operating Leases
	We are obligated under non-cancelable operating leases for office space and equipment. Approximate minimum annual rental payments under operating leases are as follows (in thousands):


		Operating Lease Obligations
	2014	$	3,249

	2015	2,442

	2016	2,249

	2017	1,985

	2018	841

	Total	$	10,766

	Substantially all of the office space subject to the operating leases in the table above is for the use of our corporate offices and area operations. Rent expense recognized totaled $4.2 million, $4.6 million and $5.4 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities of the TRS entities for financial reporting purposes and the amounts used for income tax purposes. Significant components of our deferred tax liabilities and assets are as follows (in thousands):


		December 31,
		2013				2012
	Deferred tax liabilities:
	Partnership differences	$	50,290			$	29,745

	Deferred revenue	25,596				23,139

	Capitalized interest	11,424				16,157

	Other	49				—

	Total deferred tax liabilities	$	87,359			$	69,041


	Deferred tax assets:
	Net operating, capital and other loss carryforwards	$	62,651			$	66,145

	Differences in basis of real estate	35,604				33,321

	Receivables	440				1,183

	Accruals and expenses	9,272				9,398

	Tax credit carryforwards	12,905				7,724

	Management contracts and other	393				629

	Total deferred tax assets	121,265				118,400

	Valuation allowance	(3,553		)		(4,531		)
	Net deferred income tax assets	$	30,353			$	44,828

	During the year ended December 31, 2013, we reduced the valuation allowance on a net basis by approximately $1.0 million, largely due to the expiration of tax credit carryforwards that had been fully reserved, with no impact on the effective tax rate.
	A reconciliation of the beginning and ending balance of our unrecognized tax benefits is presented below (in thousands):


		2013				2012				2011
	Balance at January 1	$	3,536			$	3,917			$	4,071

	Reductions as a result of a lapse of the applicable statutes	(764		)		(684		)		—

	Additions (reductions) based on tax positions related to prior years and current year excess benefits related to stock-based compensation	99				303				(154		)

	Balance at December 31	$	2,871			$	3,536			$	3,917

	Because the statute of limitations has not yet elapsed, our Federal income tax returns for the year ended December 31, 2009, and subsequent years and certain of our State income tax returns for the year ended December 31, 2007, and subsequent years are currently subject to examination by the IRS or other taxing authorities. Approximately $2.2 million of unrecognized benefit, if recognized, would affect the effective rate.
	On October 25, 2012, the IRS issued Final Partnership Administrative Adjustments with respect to the Aimco Operating Partnership’s 2006 and 2007 tax years. On January 18, 2013, AIMCO-GP, Inc., in its capacity as tax matters partner of the Aimco Operating Partnership, filed a petition challenging those adjustments in the United States Tax Court in Washington, D.C. On December 20, 2013, the parties agreed on the terms of a settlement of that litigation. The court ordered the parties to file stipulated decision documents by March 20, 2014, or to file a joint status report. The settlement regarding the 2006 or 2007 proposed adjustments will not have any material effect on our unrecognized tax benefits, financial condition or results of operations.
	Our policy is to include any interest and penalties related to income taxes within the income tax line item in our consolidated statements of operations.
	In accordance with the accounting requirements for stock-based compensation, we may recognize tax benefits in connection with the exercise of stock options by employees of our TRS entities and the vesting of restricted stock awards. During the years ended December 31, 2013 and 2012, we had cumulatively $0.6 million and $0.5 million, respectively, in excess tax benefits from employee stock option exercises and vested restricted stock awards. None of the excess tax benefits have yet been realized.
	Significant components of the income tax benefit or expense are as follows and are classified within income tax benefit in continuing operations and income from discontinued operations, net in our statements of operations for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013				2012				2011
	Current:
	Federal	$	—			$	—			$	(109	)

	State	63				1,047				604

	Total current	63				1,047				495


Deferred:
Federal	7,621				7,116				(143		)

State	1,685				812				(903		)

Total deferred	9,306				7,928				(1,046		)

Total expense (benefit)	$	9,369			$	8,975			$	(551	)

Classification:
Continuing operations	$	(1,959	)		$	(858	)		$	(5,941	)
Discontinued operations	$	11,328			$	9,833			$	5,390

Consolidated income or loss subject to tax consists of pretax income or loss of our TRS entities and gains or losses on certain apartment community sales that are subject to income tax under section 1374 of the Internal Revenue Code. For the years ended December 31, 2013, 2012 and 2011, we had consolidated income subject to tax of $46.6 million, $19.0 million and $5.0 million, respectively. The reconciliation of income tax attributable to continuing and discontinued operations computed at the U.S. statutory rate to income tax expense (benefit) is shown below (dollars in thousands):


	2013							2012						2011
	Amount				Percent			Amount				Percent		Amount			Percent
Tax at U.S. statutory rates on consolidated income or loss subject to tax	$	16,326			35	%		$	6,642			35	%	$	1,756		35	%

State income tax expense (benefit), net of Federal tax (benefit) expense	1,748				3.7	%		1,859				9.8	%	(299		)	(6.0	)%

Effect of permanent differences	(296		)		(0.6	)%		(256		)		(1.3	)%	(565		)	(11.3	)%
Tax effect of intercompany transfers of assets between the REIT and taxable REIT subsidiaries (1)	(4,272		)		(9.2	)%		730				3.8	%	(1,965		)	(39.2	)%

Tax credits	(4,137		)		(8.9	)%		—				—	%	—			—	%

Increase in valuation allowance	—				—	%		—				—	%	522			10.4	%

	$	9,369			20	%		$	8,975			47.3	%	$	(551	)	(11.1	)%


-1	Includes the effect of assets contributed by the Aimco Operating Partnership to TRS entities, for which deferred tax expense or benefit was recognized upon the sale or impairment of the asset by the TRS entity.
Income taxes paid totaled approximately $0.6 million, $1.1 million and $1.2 million, respectively, in the years ended December 31, 2013, 2012 and 2011, respectively.
At December 31, 2013, we had net operating loss carryforwards, or NOLs, of approximately $150.8 million for income tax purposes that expire in years 2027 to 2032. Subject to certain separate return limitations, we may use these NOLs to offset all or a portion of taxable income generated by our TRS entities. We utilized approximately $15.8 million of NOLs during the year ended December 31, 2013, as a result of taxable gains recognized by our TRS entities. As of December 31, 2013, we had low-income housing and historic tax credit carryforwards of approximately $13.4 million for income tax purposes that expire for the tax years 2017 to 2032. The deferred tax asset related to these credits is approximately $12.9 million.
For income tax purposes, dividends paid to holders of Common Stock primarily consist of ordinary income, return of capital, capital gains, qualified dividends and unrecaptured Section 1250 gains, or a combination thereof. For the years ended December 31, 2013, 2012 and 2011, dividends per share held for the entire year were estimated to be taxable as follows:


	2013							2012						2011
	Amount				Percentage			Amount				Percentage		Amount			Percentage
Ordinary income	$	0.17			17.9	%		$	—			—	%	$	—		—	%

Capital gains	0.13				13.9	%		0.35				46.6	%	0.12			24	%

Unrecaptured Section 1250 gain	0.66				68.2	%		0.41				53.4	%	0.36			76	%

	$	0.96			100	%		$	0.76			100	%	$	0.48		100	%

We designated the per share amounts above as capital gain dividends in accordance with the requirements under the Code. Additionally, we designated as 2013 capital gain dividends a like portion of preferred dividends.

Aimco_Equity

Aimco Equity	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Aimco Equity	'
	Aimco Equity
	Preferred Stock
	At December 31, 2013 and 2012, Aimco had the following classes of perpetual preferred stock outstanding (dollars in thousands):


		Redemption		Annual Dividend Rate Per Share	Balance December 31,
		Date (1)		(paid quarterly)	2013		2012
	Class Z Cumulative Preferred Stock, 4,800,000 shares authorized and 1,274,243 shares issued/outstanding	7/29/16		7.00%	$	31,114	$	31,114

	Series A Community Reinvestment Act Preferred Stock, 240 shares authorized and 74 shares issued/outstanding	6/30/11		-2	37,000		37,000

	Preferred stock per consolidated balance sheets				$	68,114	$	68,114


	-1	All classes of preferred stock were or are redeemable at our option on and after the dates specified.

	-2	For the period from the date of original issuance through March 31, 2015, the dividend rate is a variable rate per annum equal to the Three-Month LIBOR Rate (as defined in the articles supplementary designating the Series A Community Reinvestment Act Perpetual Preferred Stock, or CRA Preferred Stock) plus 1.25%, calculated as of the beginning of each quarterly dividend period. The rate at December 31, 2013 and 2012 was 1.50% and 1.61%, respectively.
	All classes of preferred stock have a $0.01 per share par value, are pari passu with each other and are senior to our Common Stock. The holders of each class of preferred stock are generally not entitled to vote on matters submitted to stockholders. Dividends on all shares of preferred stock are subject to declaration by our Board of Directors. Our Class Z Preferred Stock and Series A Community Reinvestment Act Preferred Stock have liquidation preferences per share of $25.00 and $500,000, respectively.
	During the year end December 31, 2012, Aimco redeemed 24.0 million shares of preferred stock with a weighted average dividend rate of 7.86% for $600.9 million. During the year ended December 31, 2011, Aimco redeemed 0.9 million shares of preferred stock with a dividend rate of 8.00% for $21.6 million. In connection with these redemptions, the Aimco Operating Partnership redeemed from Aimco a number of Partnership Preferred Units equal to the number of shares redeemed by Aimco. In connection with these redemptions, we wrote off previously deferred issuance costs of $20.7 million and $0.8 million, respectively, during the years ended December 31, 2012 and 2011, which is reflected as an adjustment of net income attributable to Aimco preferred stockholders and the Aimco Operating Partnership’s preferred unitholders in the accompanying consolidated statements of operations for such periods.
	The following table summarizes our issuances of Class Z Preferred Stock during the years ended December 31, 2012 and 2011 (dollars in thousands, except per share amounts):


		Years Ended December 31,
		2012			2011
	Number of shares of preferred stock issued	405,090			869,153

	Price to public per share	$	24.78		$	24.25

	Underwriting discounts, commissions and transaction costs per share	$	0.54		$	1.25

	Net proceeds per share	$	24.24		$	23

	Net proceeds to Aimco	$	9,818		$	19,990

	Issuance costs (primarily underwriting commissions) recognized as an adjustment of additional paid-in capital	$	221		$	1,085

	Aimco contributed the net proceeds from the issuances of Class Z Preferred Stock to the Aimco Operating Partnership in exchange for a number of Class Z Partnership Preferred Units equal to the number of shares issued by Aimco.
	Common Stock
	During the year ended December 31, 2012, Aimco completed two public offerings resulting in the sale of an aggregate of 22,144,200 shares of its Common Stock, generating net proceeds of $594.4 million, or net proceeds per share of $26.84. In addition, in connection with one of these offerings, the holders of near-term expiring stock options exercised 2,041,934 stock options with a weighted average exercise price of $23.01 per share for proceeds to Aimco of $47.0 million. The shares received upon exercise of the options were then sold by the stockholders as part of the offering.
	During the year ended December 31, 2011, Aimco sold 2,914,000 shares of its Common Stock pursuant to an At-The-Market, or ATM, offering program, generating $71.9 million of net proceeds.
	Aimco contributed the net proceeds from the sales and issuances of Common Stock to the Aimco Operating Partnership in exchange for a number of common partnership units equal to the number of shares sold and issued.
	Registration Statements
	Pursuant to ATM offering programs active at December 31, 2013, Aimco had the capacity to issue up to 3.5 million additional shares of its Common Stock and up to 3.5 million additional shares of its Class Z Preferred Stock. In the event of any such issuances by Aimco, the Aimco Operating Partnership would issue to Aimco a corresponding number of common partnership units or Class Z Partnership Preferred Units in exchange for the proceeds.
	Additionally, Aimco and the Aimco Operating Partnership have a shelf registration statement that provides for the issuance of debt and equity securities by Aimco and debt securities by the Aimco Operating Partnership.

Partners_Capital

Partners Capital	12 Months Ended
	Dec. 31, 2013
Partners' Capital [Abstract]	'
Partners' Capital	'
	Partners’ Capital
	Partnership Preferred Units Owned by Aimco
	At December 31, 2013 and 2012, the Aimco Operating Partnership had outstanding Partnership Preferred Units in classes and amounts similar to Aimco’s Preferred Stock discussed in Note 9. All of these classes of Partnership Preferred Units were owned by Aimco during the periods presented.
	All classes of Partnership Preferred Units are pari passu with each other and are senior to the Aimco Operating Partnership’s common partnership units. None of the classes of Partnership Preferred Units have any voting rights, except the right to approve certain changes to the Aimco Operating Partnership’s Partnership Agreement that would adversely affect holders of such class of units. Distributions on all Partnership Preferred Units are subject to being declared by the General Partner. All classes of the Partnership Preferred Units are redeemable by the Aimco Operating Partnership only in connection with a concurrent redemption by Aimco of the corresponding classes of Aimco Preferred Stock held by unrelated parties.
	As discussed in Note 9, during the years ended December 31, 2012 and 2011, Aimco completed various Preferred Stock issuances and redemptions. In connection with these issuances and redemptions, the Aimco Operating Partnership issued to Aimco or redeemed from Aimco a corresponding number of Partnership Preferred Units.
	Redeemable Partnership Preferred Units
	In addition to the Partnership Preferred Units owned by Aimco, the Aimco Operating Partnership has outstanding various classes of redeemable Partnership Preferred Units owned by third parties, which we refer to as Preferred OP Units. As of December 31, 2013 and 2012, the following classes of Preferred OP Units (stated at their redemption values, in thousands, except unit and per unit data):


			Distributions per Annum					Units Issued and Outstanding				Balances
	Class of Preferred Units		Percent		Per Unit			2013			2012	2013		2012
	Class One		8.75	%	$	8		90,000			90,000	$	8,229	$	8,229

	Class Two		1.84	%	$	0.46		18,589			18,589	465		465

	Class Three		7.88	%	$	1.97		1,354,091			1,357,691	33,852		33,942

	Class Four		8	%	$	2		644,954			644,954	16,124		16,124

	Class Six		8.5	%	$	2.13		790,883			790,883	19,772		19,772

	Class Seven		7.87	%	$	1.97		27,960			27,960	699		699

	Total							2,926,477			2,930,077	$	79,141	$	79,231

	All of the remaining outstanding classes of Preferred OP Units at December 31, 2013, are redeemable at the holders’ option. The Aimco Operating Partnership, at its sole discretion, may settle such redemption requests in cash or cause Aimco to issue shares of its Common Stock in a value equal to the redemption price. In the event the Aimco Operating Partnership requires Aimco to issue shares of Common Stock to settle a redemption request, the Aimco Operating Partnership would issue to Aimco a corresponding number of common partnership units. The Aimco Operating Partnership has a redemption policy that requires cash settlement of redemption requests for the redeemable preferred OP Units, subject to limited exceptions. Accordingly, these redeemable units are classified within temporary equity in Aimco’s consolidated balance sheets and within temporary capital in the Aimco Operating Partnership’s consolidated balance sheets, based on the expectation that the Aimco Operating Partnership will use cash to settle any redemption of these units. Subject to certain conditions, the Class Four and Class Six preferred OP Units are convertible into common OP Units.
	During the years ended December 31, 2013, 2012 and 2011, approximately 3,600, 131,400 and 1,600 preferred OP Units, respectively, were tendered for redemption in exchange for cash, and no preferred OP Units were tendered for redemption in exchange for shares of Aimco Common Stock.
	The following table presents a reconciliation of the Aimco Operating Partnership’s redeemable Partnership Preferred Units that were classified within temporary equity in Aimco’s consolidated balance sheets and temporary capital within the Aimco Operating Partnership’s consolidated balance sheets during the years ended December 31, 2013, 2012 and 2011 (dollars in thousands). The redeemable Partnership Preferred Units presented in this reconciliation include the redeemable Preferred OP Units as well as the CRA Preferred Units held by Aimco, which were redeemed by Aimco during 2011.


		2013			2012			2011
	Balance at January 1	$	80,046		$	83,384		$	103,428

	Preferred distributions	(6,423		)	(6,496		)	(6,683		)
	Redemption of preferred units	(93		)	(3,338		)	(20,044		)
	Net income	6,423			6,496			6,683

	Balance at December 31	$	79,953		$	80,046		$	83,384

	Common Partnership Units
	In the Aimco Operating Partnership’s consolidated balance sheets, the common partnership units held by Aimco are classified within Partners’ Capital as General Partner and Special Limited Partner capital and the common OP Units are classified within Limited Partners’ capital. In Aimco’s consolidated balance sheets, the common OP Units are classified within permanent equity as common noncontrolling interests in the Aimco Operating Partnership.
	Common partnership units held by Aimco are not redeemable. Common OP Units are redeemable at the holders’ option, subject to certain restrictions, on the basis of one common OP Unit for either one share of Common Stock or cash equal to the fair value of a share of Common Stock at the time of redemption. Aimco has the option to deliver shares of Common Stock in exchange for all or any portion of the common OP Units tendered for redemption. When a limited partner redeems a common OP Unit for Common Stock, Limited Partners’ capital is reduced and the General Partner and Special Limited Partners’ capital is increased. The holders of the common OP Units receive distributions, prorated from the date of issuance, in an amount equivalent to the dividends paid to holders of Common Stock.
	During the years ended December 31, 2013, 2012 and 2011, the Aimco Operating Partnership acquired the noncontrolling limited partnership interests in certain consolidated real estate partnerships in exchange for cash and the Aimco Operating Partnership’s issuance of approximately 21,500, 184,000 and 6,900 common OP Units, respectively.
	During the years ended December 31, 2013, 2012 and 2011, approximately 105,000, 416,000 and 237,000 common OP Units, respectively, were redeemed in exchange for cash, and no common OP Units were redeemed in exchange for shares of Common Stock.
	HPUs
	At December 31, 2013 and 2012, the Aimco Operating Partnership had outstanding 2,339,950 HPUs. The holders of HPUs may redeem these units commencing after December 31, 2016, on the basis of one HPU for either one share of Common Stock or cash equal to the fair value of a share of Common Stock at the time of redemption, at Aimco’s option. The holders of HPUs receive the same amount of distributions that are paid to holders of an equivalent number of common OP Units. The HPUs are classified within permanent capital as part of Limited Partners’ capital in the Aimco Operating Partnership’s consolidated balance sheets, and within permanent equity as part of common noncontrolling interests in the Aimco Operating Partnership within Aimco’s consolidated balance sheets.
	Repayment of Notes Receivable from Aimco
	As of December 31, 2010, the Aimco Operating Partnership had notes receivable from Aimco that it received in exchange for the sale of certain apartment communities to Aimco in December 2000. The notes bore interest at 5.7% per annum and had original principal amounts of $10.1 million. During the year ended December 31, 2011, Aimco repaid the then outstanding $18.5 million of outstanding principal and interest due on these notes, using its share of proceeds from a $19.7 million, or $0.15 per unit, special distribution the Aimco Operating Partnership declared and paid to holders of common partnership units and HPUs on that date.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-Based Compensation and Employee Benefit Plans	'
	Share-Based Compensation
	We have a stock award and incentive plan to attract and retain officers, key employees and independent directors. Our plan reserves for issuance a maximum of 4.4 million shares, which may be in the form of incentive stock options, non-qualified stock options and restricted stock, or other types of awards as authorized under our plan. At December 31, 2013, there were approximately 1.0 million shares available to be granted under our plan. Our plan is administered by the Compensation and Human Resources Committee of the Board of Directors. In the case of stock options, the exercise price of the options granted may not be less than the fair market value of a share of Common Stock at the date of grant. The term of the options is generally 10 years from the date of grant and the options typically vest over a period of four years from the date of grant. Restricted stock awards typically vest over a period of four years.
	The following table summarizes activity for our outstanding stock options for the years ended December 31, 2013, 2012 and 2011 (numbers of options in thousands):


		2013				2012				2011
		Number of Options		Weighted		Number of Options		Weighted		Number of Options		Weighted
				Average				Average				Average
				Exercise				Exercise				Exercise
				Price				Price				Price
	Outstanding at beginning of year	3,045		$	28.39	6,809		$	26.47	7,733		$	26.53

	Exercised	(44	)	22.52		(2,253	)	21.75		(203	)	8.99

	Forfeited	(10	)	27.82		(1,511	)	29.66		(721	)	32.09

	Outstanding at end of year	2,991		$	28.48	3,045		$	28.39	6,809		$	26.47

	Exercisable at end of year	2,991		$	28.48	2,841		$	29.79	6,146		$	27.5

	The intrinsic value of a stock option represents the amount by which the current price of the underlying stock exceeds the exercise price of the option. Options outstanding and exercisable at December 31, 2013, had an aggregate intrinsic value of $3.6 million and a weighted average remaining contractual term of 3.0 years. The intrinsic value of stock options exercised during the years ended December 31, 2013, 2012 and 2011, was $0.3 million, $10.9 million and $3.0 million respectively.
	The following table summarizes activity for restricted stock awards for the years ended December 31, 2013, 2012 and 2011 (numbers of shares in thousands):


		2013				2012				2011
		Number of Shares		Weighted		Number of Shares		Weighted		Number of Shares		Weighted
				Average				Average				Average
				Grant-Date				Grant-Date				Grant-Date
				Fair Value				Fair Value				Fair Value
	Unvested at beginning of year	526		$	22.69	463		$	21.53	544		$	19.36

	Granted	253		27.86		241		24.31		290		25.59

	Vested	(204	)	21.81		(178	)	21.86		(243	)	24.31

	Forfeited	—		—		—		—		(128	)	16.16

	Unvested at end of year	575		$	25.28	526		$	22.69	463		$	21.53

	The aggregate fair value of shares that vested during the years ended December 31, 2013, 2012 and 2011 was $5.7 million, $4.4 million and $6.1 million, respectively.
	Total compensation cost recognized for restricted stock and stock option awards was $5.9 million, $5.3 million and $5.9 million for the years ended December 31, 2013, 2012 and 2011, respectively. Of these amounts, $0.3 million, $0.4 million and $0.5 million, respectively, were capitalized. At December 31, 2013, total unvested compensation cost not yet recognized was $8.6 million. We expect to recognize this compensation over a weighted average period of approximately 1.7 years.

Assets_Held_for_Sale_and_Disco

Assets Held for Sale and Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Assets Held for Sale and Discontinued Operations	'
	Assets Held for Sale and Discontinued Operations
	We report as discontinued operations apartment communities that meet the definition of a component of an entity and have been sold or meet the criteria to be classified as held for sale. We include all results of these discontinued operations, less applicable income taxes, in a separate component of income on the consolidated statements of operations under the heading “income from discontinued operations, net.” This treatment resulted in the retrospective adjustment of the 2012 and 2011 statements of operations and the 2012 balance sheets.
	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, including whether we expect to sell such apartment communities within 12 months. Additionally, certain apartment communities that do not meet all of the criteria to be classified as held for sale at the balance sheet date may nevertheless be sold and included in discontinued operations in the subsequent 12 months; thus the number of apartment communities that may be sold during the subsequent 12 months could exceed the number classified as held for sale. At December 31, 2013, we had no apartment communities classified as held for sale. At December 31, 2012, after adjustments to classify as held for sale apartment communities that were sold during the year ended December 31, 2013, we had 29 apartment communities with an aggregate of 6,953 apartment homes classified as held for sale. Amounts classified as held for sale in the accompanying consolidated balance sheets as of December 31, 2012, are as follows (in thousands):


		December 31,
		2012
	Real estate, net	$	279,653

	Other assets	10,093

	Assets held for sale	$	289,746


	Non-recourse property debt	$	278,538

	Other liabilities	2,900

	Liabilities related to assets held for sale	$	281,438

	During the years ended December 31, 2013, 2012 and 2011, we sold 29, 75 and 67 consolidated apartment communities with an aggregate of 6,953, 11,232 and 10,912 apartment homes, respectively. For each of the periods presented, discontinued operations includes the results of operations for the periods prior to the date of disposition for all apartment communities sold as of December 31, 2013.
	The following is a summary of the components of income from discontinued operations and the related amounts of income from discontinued operations attributable to Aimco, the Aimco Operating Partnership and noncontrolling interests for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013			2012			2011
	Rental and other property revenues	$	62,152		$	140,634		$	226,623

	Property operating expenses	(30,695		)	(62,781		)	(111,549		)
	Depreciation and amortization	(16,372		)	(41,577		)	(72,099		)
	Recovery of (provision for) real estate impairment losses	16			(17,452		)	(20,246		)

	Operating income	15,101			18,824			22,729

	Interest income	343			568			1,561

	Interest expense	(13,346		)	(29,972		)	(49,030		)
	Income (loss) before gain on dispositions of real estate and income tax	2,098			(10,580		)	(24,740		)

	Gain on dispositions of real estate	212,459			234,530			108,203

	Income tax expense	(11,328		)	(9,833		)	(5,390		)
	Income from discontinued operations, net	$	203,229		$	214,117		$	78,073

	Income from discontinued operations attributable to noncontrolling interests in consolidated real estate partnerships	(31,842		)	(41,633		)	(32,231		)
	Income from discontinued operations attributable to the Aimco Operating Partnership	$	171,387		$	172,484		45,842

	Income from discontinued operations attributable to noncontrolling interests in Aimco Operating Partnership	(9,248		)	(10,238		)	(3,147		)
	Income from discontinued operations attributable to Aimco	$	162,139		$	162,246		$	42,695

	Gain on dispositions of real estate is reported 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 $16.5 million, $16.5 million and $14.9 million for the years ended December 31, 2013, 2012 and 2011, respectively. We classify interest expense related to property debt within discontinued operations when the related real estate asset is sold or classified as held for sale.

Earnings_Loss_per_ShareUnit

Earnings (Loss) per Share/Unit	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings (Loss) per Share/Unit	'
	Earnings (Loss) per Share/Unit
	Aimco
	The following table illustrates Aimco’s calculation of basic and diluted earnings (loss) per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share data):


		2013				2012				2011
	Numerator:
	Income (loss) from continuing operations	$	34,596			$	(18,756	)		$	(136,237	)

	Loss (income) from continuing operations attributable to noncontrolling interests	10,555				(11,034		)		36,455

	Income attributable to preferred stockholders	(2,804		)		(49,888		)		(45,852		)
	Income attributable to participating securities	(813		)		(422		)		(222		)
	Income (loss) from continuing operations attributable to Aimco common stockholders	$	41,534			$	(80,100	)		$	(145,856	)

	Income from discontinued operations	$	203,229			$	214,117			$	78,073

	Income from discontinued operations attributable to noncontrolling interests	(41,090		)		(51,871		)		(35,378		)
	Income from discontinued operations attributable to Aimco common stockholders	$	162,139			$	162,246			$	42,695

	Net income (loss)	$	237,825			$	195,361			$	(58,164	)

	Net (income) loss attributable to noncontrolling interests	(30,535		)		(62,905		)		1,077

	Net income attributable to preferred stockholders	(2,804		)		(49,888		)		(45,852		)
	Net income attributable to participating securities	(813		)		(422		)		(222		)
	Net income (loss) attributable to Aimco common stockholders	$	203,673			$	82,146			$	(103,161	)

	Denominator:
	Weighted average common shares outstanding – basic	145,291				134,479				119,312

	Dilutive potential common shares	241				—				—

	Weighted average common shares outstanding – diluted	145,532				134,479				119,312

	Earnings (loss) per common share – basic and diluted:
	Income (loss) from continuing operations attributable to Aimco common stockholders	$	0.29			$	(0.60	)		$	(1.22	)

	Income from discontinued operations attributable to Aimco common stockholders	1.11				1.21				0.36

	Net income (loss) attributable to Aimco common stockholders	$	1.4			$	0.61			$	(0.86	)

	Dividends declared per common share	$	0.96			$	0.76			$	0.48

	The Aimco Operating Partnership
	The following table illustrates the Aimco Operating Partnership’s calculation of basic and diluted earnings (loss) per unit for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per unit data):


		2013				2012				2011
	Numerator:
	Income (loss) from continuing operations	$	34,596			$	(18,756	)		$	(134,938	)

	Loss (income) from continuing operations attributable to noncontrolling interests	19,369				(9,585		)		32,488

	Income attributable to the Partnership’s preferred unitholders	(9,227		)		(56,384		)		(52,535		)
	Income attributable to participating securities	(813		)		(422		)		(222		)
	Income (loss) from continuing operations attributable to the Partnership’s common unitholders	$	43,925			$	(85,147	)		$	(155,207	)

	Income from discontinued operations	$	203,229			$	214,117			$	78,073

	Income from discontinued operations attributable to noncontrolling interests	(31,842		)		(41,633		)		(32,231		)
	Income from discontinued operations attributable to the Partnership’s common unitholders	$	171,387			$	172,484			$	45,842

Net income (loss)	$	237,825			$	195,361			$	(56,865	)

Net (income) loss attributable to noncontrolling interests	(12,473		)		(51,218		)		257

Net income attributable to the Partnership’s preferred unitholders	(9,227		)		(56,384		)		(52,535		)
Net income attributable to participating securities	(813		)		(422		)		(222		)
Net income (loss) attributable to the Partnership’s common unitholders	$	215,312			$	87,337			$	(109,365	)

Denominator:
Weighted average common units outstanding – basic	153,256				142,614				127,681

Dilutive potential common units	241				—				—

Weighted average common units outstanding – diluted	153,497				142,614				127,681

Earnings (loss) per common unit – basic and diluted:
Income (loss) from continuing operations attributable to the Partnership’s common unitholders	$	0.29			$	(0.60	)		$	(1.22	)

Income from discontinued operations attributable to the Partnership’s common unitholders	1.11				1.21				0.36

Net income (loss) attributable to the Partnership’s common unitholders	$	1.4			$	0.61			$	(0.86	)

Distributions declared per unit	$	0.96			$	0.76			$	0.63

Distributions declared per unit during the year ended December 31, 2011, includes a special distribution of $0.15 per unit which is discussed further in Note 10.
Aimco and the Aimco Operating Partnership
As of December 31, 2013, the common share or unit equivalents that could potentially dilute basic earnings per share or unit in future periods totaled 3.0 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 year ended December 31, 2013, and accordingly has been included in the denominator for calculating diluted earnings per share and unit for this period. These securities have been excluded from the earnings (loss) per share or unit computations for the years ended December 31, 2012 and 2011, because their effect would have been anti-dilutive. Participating securities, consisting primarily of unvested restricted shares of Common Stock, receive dividends similar to shares of Common Stock and common partnership units and totaled 0.6 million, 0.5 million and 0.5 million at December 31, 2013, 2012 and 2011, respectively. The effect of participating securities is included in basic and diluted earnings (loss) per share and unit computations for the periods presented above using the two-class method of allocating distributed and undistributed earnings.
As discussed in Note 10, the Aimco Operating Partnership has various classes of preferred OP Units, which may be redeemed at the holders’ option. The Aimco Operating Partnership may redeem these units for cash or at its option, shares of Common Stock. As of December 31, 2013, these preferred OP Units were potentially redeemable for approximately 3.1 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 expect these securities to be excluded from earnings (loss) per share or unit computations in future periods.

Unaudited_Summarized_Consolida

Unaudited Summarized Consolidated Quarterly Information	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Unaudited Summarized Consolidated Quarterly Information	'
	Unaudited Summarized Consolidated Quarterly Information
	Aimco
	Aimco’s summarized unaudited consolidated quarterly information for 2013 and 2012 is provided below (in thousands, except per share amounts).


			Quarter (1)
	2013		First				Second				Third				Fourth
	Total revenues		$	237,504			$	241,744			$	243,943			$	250,862

	Total operating expenses		(184,864		)		(183,033		)		(179,430		)		(177,707		)
	Operating income		52,640				58,711				64,513				73,155

	(Loss) income from continuing operations		(1,662		)		2,477				6,977				26,804

	Income from discontinued operations, net		4,495				4,502				72,433				121,799

	Net income		2,833				6,979				79,410				148,603

	Net income attributable to Aimco common stockholders		$	5,050			$	10,107			$	66,268			$	122,037

	Earnings (loss) per common share - basic and diluted:
	(Loss) income from continuing operations attributable to Aimco common stockholders		$	(0.01	)		$	0.01			$	0.04			$	0.25

	Net income attributable to Aimco common stockholders		$	0.03			$	0.07			$	0.46			$	0.84

	Weighted average common shares outstanding - basic		145,169				145,321				145,334				145,341

	Weighted average common shares outstanding - diluted		145,169				145,674				145,563				145,499



			Quarter (1)
	2012		First				Second				Third				Fourth
	Total revenues		$	231,748			$	236,085			$	242,973			$	247,705

	Total operating expenses		(199,743		)		(190,343		)		(197,071		)		(192,338		)
	Operating income		32,005				45,742				45,902				55,367

	(Loss) income from continuing operations		(26,294		)		(5,670		)		5,369				7,839

	Income from discontinued operations, net		36,941				39,801				47,966				89,409

	Net income		10,647				34,131				53,335				97,248

	Net (loss) income attributable to Aimco common stockholders		$	(10,609	)		$	523			$	24,163			$	67,928

	Loss per common share - basic and diluted:
	Loss from continuing operations attributable to Aimco common stockholders		$	(0.30	)		$	(0.25	)		$	(0.07	)		$	(0.01	)
	Net (loss) income attributable to Aimco common stockholders		$	(0.09	)		$	—			$	0.17			$	0.47

	Weighted average common shares outstanding - basic and diluted		120,526				127,395				144,959				145,035



	The Aimco Operating Partnership
	The Aimco Operating Partnership’s summarized unaudited consolidated quarterly information for 2013 and 2012 is provided below (in thousands, except per share amounts).


			Quarter (1)
	2013		First				Second				Third				Fourth
	Total revenues		$	237,504			$	241,744			$	243,943			$	250,862

	Total operating expenses		(184,864		)		(183,033		)		(179,430		)		(177,707		)
Operating income		52,640				58,711				64,513				73,155

(Loss) income from continuing operations		(1,662		)		2,477				6,977				26,804

Income from discontinued operations, net		4,495				4,502				72,433				121,799

Net income		2,833				6,979				79,410				148,603

Net income attributable to the Partnership’s common unitholders		$	5,347			$	10,682			$	70,064			$	129,008

Earnings (loss) per common unit - basic and diluted:
(Loss) income from continuing operations attributable to the Partnership’s common unitholders		$	(0.01	)		$	0.01			$	0.04			$	0.25

Net income attributable to the Partnership’s common unitholders		$	0.03			$	0.07			$	0.46			$	0.84

Weighted average common units outstanding - basic		153,169				153,294				153,287				153,276

Weighted average common units outstanding - diluted		153,169				153,647				153,516				153,434



		Quarter (1)
2012		First				Second				Third				Fourth
Total revenues		$	231,748			$	236,085			$	242,973			$	247,705

Total operating expenses		(199,743		)		(190,343		)		(197,071		)		(192,338		)
Operating income		32,005				45,742				45,902				55,367

(Loss) income from continuing operations		(26,294		)		(5,670		)		5,369				7,839

Income from discontinued operations, net		36,941				39,801				47,966				89,409

Net income		10,647				34,131				53,335				97,248

Net (loss) income attributable to the Partnership’s common unitholders		$	(11,346	)		$	578			$	25,774			$	72,190

Loss per common unit - basic and diluted:
Loss from continuing operations attributable to the Partnership’s common unitholders		$	(0.30	)		$	(0.25	)		$	(0.07	)		$	(0.01	)
Net (loss) income attributable to the Partnership’s common unitholders		$	(0.09	)		$	—			$	0.17			$	0.47

Weighted average common units outstanding - basic and diluted		128,729				135,622				152,997				153,107


-1	Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

Business_Segments

Business Segments	12 Months Ended
	Dec. 31, 2013
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 162 apartment communities with 50,486 apartment homes at December 31, 2013. Our affordable real estate operations consisted of 74 apartment communities with 10,067 apartment homes at December 31, 2013, 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 operating decision maker, uses proportionate property net operating income to asses 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 manage.
	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 for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		Conventional			Affordable			Proportionate			Corporate and				Consolidated
		Real Estate			Real Estate			Adjustments (1)			Amounts Not
		Operations			Operations						Allocated to
											Segments
	Year Ended December 31, 2013:
	Rental and other property revenues (2)	$	803,242		$	98,713		$	37,201		$	75			$	939,231

	Tax credit and asset management revenues	—			—			—			34,822				34,822

	Total revenues	803,242			98,713			37,201			34,897				974,053

	Property operating expenses (2)	285,062			39,717			13,406			37,487				375,672

	Investment management expenses	—			—			—			4,341				4,341

	Depreciation and amortization (2)	—			—			—			291,910				291,910

	General and administrative expenses	—			—			—			45,708				45,708

	Other expenses, net	—			—			—			7,403				7,403

	Total operating expenses	285,062			39,717			13,406			386,849				725,034

	Operating income (loss)	518,180			58,996			23,795			(351,952		)		249,019

	Other items included in continuing operations	—			—			—			(214,423		)		(214,423		)

	Income (loss) from continuing operations	$	518,180		$	58,996		$	23,795		$	(566,375	)		$	34,596



		Conventional			Affordable			Proportionate			Corporate and				Consolidated
		Real Estate			Real Estate			Adjustments (1)			Amounts Not
		Operations			Operations						Allocated to
											Segments
	Year Ended December 31, 2012:
	Rental and other property revenues (2)	$	761,876		$	97,135		$	57,251		$	480			$	916,742

	Tax credit and asset management revenues	—			—			—			41,769				41,769

	Total revenues	761,876			97,135			57,251			42,249				958,511

	Property operating expenses (2)	274,414			38,932			23,562			37,439				374,347

	Investment management expenses	—			—			—			12,008				12,008

	Depreciation and amortization (2)	—			—			—			325,173				325,173

	Provision for real estate impairment losses (2)	—			—			—			6,235				6,235

	General and administrative expenses	—			—			—			49,602				49,602

	Other expenses, net	—			—			—			12,130				12,130

	Total operating expenses	274,414			38,932			23,562			442,587				779,495

	Operating income (loss)	487,462			58,203			33,689			(400,338		)		179,016

Other items included in continuing operations	—			—			—			(197,772		)		(197,772		)

Income (loss) from continuing operations	$	487,462		$	58,203		$	33,689		$	(598,110	)		$	(18,756	)



	Conventional			Affordable			Proportionate			Corporate and				Consolidated
	Real Estate			Real Estate			Adjustments (1)			Amounts Not
	Operations			Operations						Allocated to
										Segments
Year Ended December 31, 2011:
Rental and other property revenues (2)	$	724,866		$	94,007		$	55,627		$	1,194			$	875,694

Tax credit and asset management revenues	—			—			—			38,661				38,661

Total revenues	724,866			94,007			55,627			39,855				914,355

Property operating expenses (2)	263,969			37,096			22,140			52,959				376,164

Investment management expenses	—			—			—			10,459				10,459

Depreciation and amortization (2)	—			—			—			323,233				323,233

General and administrative expenses	—			—			—			50,906				50,906

Other expenses, net	—			—			—			18,302				18,302

Total operating expenses	263,969			37,096			22,140			455,859				779,064

Operating income (loss)	460,897			56,911			33,487			(416,004		)		135,291

Other items included in continuing operations (3)	—			—			—			(271,528		)		(271,528		)

Income (loss) from continuing operations	$	460,897		$	56,911		$	33,487		$	(687,532	)		$	(136,237	)


-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	Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

-3	In addition to the other items included in continuing operations presented in the table for the year ending December 31, 2011, the Aimco Operating Partnership recognized $1.3 million of interest income on its notes receivable from Aimco. These notes were repaid by Aimco during the three months ended December 31, 2011.
The assets of our reportable segments on a proportionate basis, together with the proportionate adjustments to reconcile these amounts to the consolidated assets of our segments, and the consolidated assets not allocated to our segments are as follows (in thousands):


	2013			2012
Conventional	$	4,793,472		$	4,837,236

Affordable	382,091			466,678

Proportionate adjustments (1)	428,376			634,858

Corporate and other assets	475,474			462,608

Total consolidated assets	$	6,079,413		$	6,401,380


-1	Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the assets of our consolidated apartment communities, which are excluded from our measurement of segment financial condition, and our share of the assets of our unconsolidated real estate partnerships, which are included in our measure of segment financial condition.
For the years ended December 31, 2013, 2012 and 2011, capital additions related to our conventional segment totaled $365.3 million, $252.3 million and $191.6 million, respectively, and capital additions related to our affordable segment totaled $10.7 million, $19.8 million and $15.6 million, respectively.

Real_Estate_and_Accumulated_De

Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2013
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]	'
Schedule III: Real Estate and Accumulated Depreciation Disclosure	'


	APARTMENT INVESTMENT AND MANAGEMENT COMPANY
	AIMCO PROPERTIES, L.P.
	SCHEDULE III: REAL ESTATE AND ACCUMULATED DEPRECIATION
	31-Dec-13
	(In Thousands Except Apartment Home Data)


								-2						-3
			-1					Initial Cost						Cost Capitalized			31-Dec-13
		Apartment	Date		Year	Apartment					Buildings and			Subsequent to						Buildings and			-4			Accumulated			Total Cost
	Apartment Community Name	Type	Consolidated	Location	Built	Homes		Land			Improvements			Consolidation			Land			Improvements			Total			Depreciation (AD)			Net of AD			Encumbrances

	Conventional Apartment Communities:
	100 Forest Place	High Rise	Dec-97	Oak Park, IL	1987	234		$	2,664		$	18,815		$	6,494		$	2,664		$	25,309		$	27,973		$	(11,077	)	$	16,896		$	25,955

	118-122 West 23rd Street	High Rise	12-Jun	New York, NY	1987	42		14,985			23,459			3,942			14,985			27,401			42,386			(1,366		)	41,020			19,493

	1582 First Avenue	High Rise	5-Mar	New York, NY	1900	17		4,281			752			318			4,281			1,070			5,351			(452		)	4,899			2,520

	173 E. 90th Street	High Rise	4-May	New York, NY	1910	72		12,066			4,535			2,442			12,067			6,976			19,043			(2,546		)	16,497			7,435

	182-188 Columbus Avenue	Mid Rise	7-Feb	New York, NY	1910	32		19,123			3,300			2,608			19,123			5,908			25,031			(2,075		)	22,956			13,471

	204-206 West 133rd Street	Mid Rise	7-Jun	New York, NY	1910	44		4,352			1,450			1,556			4,352			3,006			7,358			(957		)	6,401			2,963

	2232-2240 Seventh Avenue	Mid Rise	7-Jun	New York, NY	1910	24		3,366			3,785			1,266			3,366			5,051			8,417			(1,423		)	6,994			2,972

	2247-2253 Seventh Avenue	Mid Rise	7-Jun	New York, NY	1910	35		7,356			3,335			1,649			7,356			4,984			12,340			(1,768		)	10,572			5,483

	2252-2258 Seventh Avenue	Mid Rise	7-Jun	New York, NY	1910	35		4,318			4,504			1,706			4,318			6,210			10,528			(1,810		)	8,718			5,125

	2300-2310 Seventh Avenue	Mid Rise	7-Jun	New York, NY	1910	63		10,417			6,964			4,642			10,417			11,606			22,023			(4,017		)	18,006			9,362

	236-238 East 88th Street	High Rise	4-Jan	New York, NY	1900	43		8,820			2,914			2,097			8,820			5,011			13,831			(1,737		)	12,094			12,000

	237-239 Ninth Avenue	High Rise	5-Mar	New York, NY	1900	36		8,495			1,866			1,449			8,494			3,316			11,810			(1,131		)	10,679			6,155

	240 West 73rd Street, LLC	High Rise	4-Sep	New York, NY	1900	200		68,109			12,140			8,646			68,109			20,786			88,895			(6,290		)	82,605			27,704

	2484 Seventh Avenue	Mid Rise	7-Jun	New York, NY	1921	23		2,601			1,726			772			2,601			2,498			5,099			(652		)	4,447			2,472

	2900 on First Apartments	Mid Rise	8-Oct	Seattle, WA	1989	135		19,070			17,518			17,374			19,071			34,891			53,962			(5,106		)	48,856			19,337

	306 East 89th Street	High Rise	4-Jul	New York, NY	1930	20		2,680			1,006			418			2,681			1,423			4,104			(523		)	3,581			2,055

	311 & 313 East 73rd Street	Mid Rise	3-Mar	New York, NY	1904	34		5,678			1,609			543			5,678			2,152			7,830			(1,282		)	6,548			2,512

	322-324 East 61st Street	High Rise	5-Mar	New York, NY	1900	40		6,372			2,224			1,229			6,372			3,453			9,825			(1,368		)	8,457			3,780

	3400 Avenue of the Arts	Mid Rise	2-Mar	Costa Mesa, CA	1987	770		57,241			65,506			72,777			57,240			138,284			195,524			(71,918		)	123,606			113,022

	452 East 78th Street	High Rise	4-Jan	New York, NY	1900	12		1,982			608			458			1,982			1,066			3,048			(416		)	2,632			1,456

	464-466 Amsterdam & 200-210 W. 83rd Street	Mid Rise	7-Feb	New York, NY	1910	72		25,553			7,101			4,506			25,552			11,608			37,160			(3,634		)	33,526			19,679

	510 East 88th Street	High Rise	4-Jan	New York, NY	1900	20		3,163			1,002			387			3,163			1,389			4,552			(457		)	4,095			2,396

	514-516 East 88th Street	High Rise	5-Mar	New York, NY	1900	36		6,282			2,168			775			6,282			2,943			9,225			(1,170		)	8,055			4,097

	707 Leahy	Garden	7-Apr	Redwood City, CA	1973	110		15,444			7,909			4,936			15,444			12,845			28,289			(4,621		)	23,668			9,601

865 Bellevue	Garden	Jul-00	Nashville, TN	1972	326		3,562			12,037			28,070			3,562			40,107			43,669			(23,536		)	20,133			18,154

Arbours Of Hermitage, The	Garden	Jul-00	Hermitage, TN	1972	350		3,217			12,023			8,376			3,217			20,399			23,616			(10,525		)	13,091			9,398

Auburn Glen (5)	Garden	6-Dec	Jacksonville, FL	1974	251		7,670			8,191			4,075			7,670			6,562			14,232			(4,201		)	10,031			9,271

Bank Lofts	High Rise	1-Apr	Denver, CO	1920	117		3,525			9,045			2,173			3,525			11,218			14,743			(5,537		)	9,206			11,601

Bay Parc Plaza	High Rise	4-Sep	Miami, FL	2000	471		22,680			41,847			6,979			22,680			48,826			71,506			(12,557		)	58,949			45,252

Bay Ridge at Nashua	Garden	3-Jan	Nashua, NH	1984	412		3,262			40,713			5,719			3,262			46,432			49,694			(15,956		)	33,738			30,740

Bayberry Hill Estates	Garden	2-Aug	Framingham, MA	1971	424		19,944			35,945			12,775			19,944			48,720			68,664			(19,082		)	49,582			33,252

Bluffs at Pacifica, The	Garden	6-Oct	Pacifica, CA	1963	64		8,108			4,132			13,692			8,108			17,824			25,932			(7,878		)	18,054			5,963

Boston Lofts	High Rise	1-Apr	Denver, CO	1/1/1890	158		3,446			20,589			6,072			3,447			26,660			30,107			(12,087		)	18,020			16,948

Boulder Creek	Garden	Jul-94	Boulder, CO	1973	221		754			7,730			18,580			755			26,309			27,064			(14,011		)	13,053			8,771

Broadcast Center	Garden	2-Mar	Los Angeles, CA	1990	279		29,407			41,244			27,142			29,407			68,386			97,793			(31,926		)	65,867			55,083

Broadway Lofts	High Rise	12-Sep	San Diego, CA	1909	84		5,367			14,442			760			5,367			15,202			20,569			(724		)	19,845			10,194

Buena Vista	Mid Rise	6-Jan	Pasadena, CA	1973	92		9,693			6,818			1,499			9,693			8,317			18,010			(2,607		)	15,403			10,033

Burke Shire Commons	Garden	1-Mar	Burke, VA	1986	360		4,867			23,617			8,707			4,867			32,324			37,191			(13,704		)	23,487			42,239

Calhoun Beach Club	High Rise	Dec-98	Minneapolis, MN	1928	332		11,708			73,334			50,873			11,708			124,207			135,915			(58,397		)	77,518			46,590

Canterbury Green	Garden	Dec-99	Fort Wayne, IN	1970	1,988		13,659			73,115			24,041			13,659			97,156			110,815			(54,409		)	56,406			50,629

Canyon Terrace	Garden	2-Mar	Saugus, CA	1984	130		7,508			6,601			6,160			7,508			12,761			20,269			(6,305		)	13,964			10,091



							-2						-3
		-1					Initial Cost						Cost Capitalized			31-Dec-13
	Apartment	Date		Year	Apartment					Buildings and			Subsequent to						Buildings and			-4			Accumulated			Total Cost
Apartment Community Name	Type	Consolidated	Location	Built	Homes		Land			Improvements			Consolidation			Land			Improvements			Total			Depreciation (AD)			Net of AD			Encumbrances

Casa del Mar at Baymeadows	Garden	6-Oct	Jacksonville, FL	1984	144		5,039			10,562			2,902			5,039			13,464			18,503			(4,092		)	14,411			8,820

Cedar Rim	Garden	Apr-00	Newcastle, WA	1980	104		761			5,218			17,029			761			22,247			23,008			(17,854		)	5,154			7,479

Center Square	High Rise	Oct-99	Doylestown, PA	1975	350		582			4,190			3,022			582			7,212			7,794			(3,605		)	4,189			12,910

Charlesbank Apartment Homes	Mid Rise	13-Sep	Watertown, MA	2012	44		3,399			11,726			23			3,399			11,749			15,148			(114		)	15,034			8,500

Chestnut Hall	High Rise	6-Oct	Philadelphia, PA	1923	315		12,338			14,299			6,812			12,338			21,111			33,449			(10,199		)	23,250			17,238

Chestnut Hill Village	Garden	Apr-00	Philadelphia, PA	1963	821		6,469			49,316			48,831			6,469			98,147			104,616			(57,443		)	47,173			56,368

Chimneys of Cradle Rock	Garden	4-Jun	Columbia, MD	1979	198		2,040			8,108			1,243			2,040			9,351			11,391			(3,382		)	8,009			16,156

Colony at Kenilworth	Garden	Oct-99	Towson, MD	1966	383		2,403			18,799			15,903			2,403			34,702			37,105			(21,537		)	15,568			23,048

Columbus Avenue	Mid Rise	3-Sep	New York, NY	1/1/1880	59		35,527			9,450			4,598			35,527			14,048			49,575			(7,973		)	41,602			27,843

Creekside	Garden	Jan-00	Denver, CO	1974	328		3,189			12,698			5,479			3,189			18,177			21,366			(10,358		)	11,008			12,424

Crescent at West Hollywood, The	Mid Rise	2-Mar	West Hollywood, CA	1985	130		15,765			10,215			14,427			15,765			24,642			40,407			(16,813		)	23,594			23,694

Elm Creek	Mid Rise	Dec-97	Elmhurst, IL	1987	400		5,910			30,830			30,750			5,910			61,580			67,490			(26,139		)	41,351			41,472

Evanston Place	High Rise	Dec-97	Evanston, IL	1990	189		3,232			25,546			6,229			3,232			31,775			35,007			(14,147		)	20,860			20,628

Farmingdale	Mid Rise	Oct-00	Darien, IL	1975	240		11,763			15,174			10,119			11,763			25,293			37,056			(13,304		)	23,752			16,027

Flamingo Towers	High Rise	Sep-97	Miami Beach, FL	1960	1,161		32,239			39,410			240,961			32,239			280,371			312,610			(116,869		)	195,741			112,970

Four Quarters Habitat	Garden	6-Jan	Miami, FL	1976	336		2,379			17,199			18,160			2,379			35,359			37,738			(19,850		)	17,888			8,644

Foxchase	Garden	Dec-97	Alexandria, VA	1940	2,113		15,496			96,062			32,317			15,496			128,379			143,875			(64,462		)	79,413			246,181

Georgetown	Garden	2-Aug	Framingham, MA	1964	207		12,351			13,168			2,038			12,351			15,206			27,557			(5,775		)	21,782			9,692

Granada	Mid Rise	2-Aug	Framingham, MA	1958	72		4,577			4,057			867			4,577			4,924			9,501			(2,449		)	7,052			3,246

Grand Pointe	Garden	Dec-99	Columbia, MD	1972	325		2,714			16,771			5,401			2,715			22,171			24,886			(10,457		)	14,429			15,695

Greens	Garden	Jul-94	Chandler, AZ	2000	324		2,303			713			28,836			2,303			29,549			31,852			(17,513		)	14,339			9,377

Heritage Park Escondido	Garden	Oct-00	Escondido, CA	1986	196		1,055			7,565			1,495			1,055			9,060			10,115			(5,391		)	4,724			7,236

Heritage Park Livermore	Garden	Oct-00	Livermore, CA	1988	167		1,039			9,170			1,382			1,039			10,552			11,591			(5,920		)	5,671			7,468

Heritage Village Anaheim	Garden	Oct-00	Anaheim, CA	1986	196		1,832			8,541			1,513			1,832			10,054			11,886			(5,867		)	6,019			8,781

Hidden Cove	Garden	Jul-98	Escondido, CA	1983	334		3,043			17,616			7,508			3,043			25,124			28,167			(12,839		)	15,328			29,073

Hidden Cove II	Garden	7-Jul	Escondido, CA	1986	118		12,849			6,530			6,257			12,849			12,787			25,636			(6,137		)	19,499			10,864

Hillcreste	Garden	2-Mar	Century City, CA	1989	315		35,862			47,216			24,470			35,862			71,686			107,548			(34,664		)	72,884			70,250

Hillmeade	Garden	Nov-94	Nashville, TN	1986	288		2,872			16,070			10,594			2,872			26,664			29,536			(14,712		)	14,824			17,073

Horizons West Apartments	Mid Rise	6-Dec	Pacifica, CA	1970	78		8,887			6,377			1,868			8,887			8,245			17,132			(3,011		)	14,121			4,807

Hunt Club	Garden	Sep-00	Gaithersburg, MD	1986	336		17,859			13,149			8,445			17,859			21,594			39,453			(9,435		)	30,018			—

Hunter's Chase	Garden	1-Jan	Midlothian, VA	1985	320		7,935			7,915			3,113			7,935			11,028			18,963			(4,729		)	14,234			15,350

Hunters Glen	Garden	Oct-99	Plainsboro, NJ	1976	896		8,778			47,259			42,658			8,779			89,916			98,695			(63,437		)	35,258			64,358

Hyde Park Tower	High Rise	4-Oct	Chicago, IL	1990	155		4,731			14,927			3,373			4,731			18,300			23,031			(4,815		)	18,216			14,028

Indian Oaks	Garden	2-Mar	Simi Valley, CA	1986	254		24,523			15,801			5,200			24,523			21,001			45,524			(8,904		)	36,620			31,184

Island Club	Garden	Oct-00	Oceanside, CA	1986	592		18,027			28,654			14,010			18,027			42,664			60,691			(23,271		)	37,420			61,169

Key Towers	High Rise	1-Apr	Alexandria, VA	1964	140		1,526			7,050			6,262			1,526			13,312			14,838			(8,036		)	6,802			10,287

Lakeside	Garden	Oct-99	Lisle, IL	1972	568		5,840			27,937			32,029			5,840			59,966			65,806			(38,230		)	27,576			27,808

Lakeside at Vinings Mountain	Garden	Jan-00	Atlanta, GA	1983	220		2,111			11,862			15,823			2,111			27,685			29,796			(18,631		)	11,165			14,459

Latrobe	High Rise	3-Jan	Washington, DC	1980	175		3,459			9,103			16,140			3,459			25,243			28,702			(17,149		)	11,553			29,452

Lazy Hollow	Garden	5-Apr	Columbia, MD	1979	178		2,429			12,181			326			2,430			12,506			14,936			(6,132		)	8,804			13,332

Lincoln Place (5)	Garden	4-Oct	Venice, CA	1951	696		128,332			10,439			242,465			44,197			252,904			297,101			(3,581		)	293,520			134,869

Lodge at Chattahoochee, The	Garden	Oct-99	Sandy Springs, GA	1970	312		2,335			16,370			23,999			2,335			40,369			42,704			(25,788		)	16,916			21,201

Los Arboles	Garden	Sep-97	Chandler, AZ	1986	232		1,662			9,504			2,847			1,662			12,351			14,013			(6,212		)	7,801			7,687

Malibu Canyon	Garden	2-Mar	Calabasas, CA	1986	698		69,834			53,438			32,554			69,834			85,992			155,826			(42,448		)	113,378			90,240

Maple Bay	Garden	Dec-99	Virginia Beach, VA	1971	414		2,597			16,141			29,362			2,598			45,502			48,100			(29,535		)	18,565			31,143

Mariners Cove	Garden	2-Mar	San Diego, CA	1984	500		—			66,861			7,545			—			74,406			74,406			(27,789		)	46,617			1,904

Meadow Creek	Garden	Jul-94	Boulder, CO	1968	332		1,435			24,533			5,717			1,435			30,250			31,685			(15,049		)	16,636			22,643

Merrill House	High Rise	Jan-00	Falls Church, VA	1964	159		1,836			10,831			6,790			1,836			17,621			19,457			(7,737		)	11,720			18,514



							-2						-3
		-1					Initial Cost						Cost Capitalized			31-Dec-13
	Apartment	Date		Year	Apartment					Buildings and			Subsequent to						Buildings and			-4			Accumulated			Total Cost
Apartment Community Name	Type	Consolidated	Location	Built	Homes		Land			Improvements			Consolidation			Land			Improvements			Total			Depreciation (AD)			Net of AD			Encumbrances

Monterey Grove	Garden	8-Jun	San Jose, CA	1999	224		34,325			21,939			3,318			34,325			25,257			59,582			(6,919		)	52,663			33,438

Oak Park Village	Garden	Oct-00	Lansing, MI	1972	618		10,048			16,771			6,025			10,048			22,796			32,844			(13,482		)	19,362			—

Ocean House on Prospect	Mid Rise	13-Apr	La Jolla, CA	1970	60		12,528			18,805			455			12,528			19,260			31,788			(480		)	31,308			14,583

Pacific Bay Vistas (5)	Garden	1-Mar	San Bruno, CA	1987	308		28,694			62,460			23,061			22,994			85,520			108,514			(2,482		)	106,032			58,108

Pacifica Park	Garden	6-Jul	Pacifica, CA	1977	104		12,970			6,579			3,452			12,970			10,031			23,001			(4,280		)	18,721			12,135

Palazzo at Park La Brea, The	Mid Rise	4-Feb	Los Angeles, CA	2002	521		48,362			125,464			21,929			48,362			147,393			195,755			(52,213		)	143,542			117,943

Palazzo East at Park La Brea, The	Mid Rise	5-Mar	Los Angeles, CA	2005	611		72,578			136,503			13,319			72,578			149,822			222,400			(50,189		)	172,211			122,992

Paradise Palms	Garden	Jul-94	Phoenix, AZ	1985	130		647			3,516			6,452			647			9,968			10,615			(6,693		)	3,922			6,026

Park & 12th	Mid Rise	13-Jul	Atlanta, GA	2012	30		2,793			6,662			14			2,793			6,676			9,469			(103		)	9,366			6,185

Park Towne Place	High Rise	Apr-00	Philadelphia, PA	1959	959		10,472			47,301			126,690			10,472			173,991			184,463			(44,061		)	140,402			—

Parktown Townhouses	Garden	Oct-99	Deer Park, TX	1968	309		2,572			12,051			13,434			2,572			25,485			28,057			(12,418		)	15,639			10,180

Parkway	Garden	Mar-00	Willamsburg, VA	1971	148		386			2,834			3,055			386			5,889			6,275			(3,478		)	2,797			8,642

Pathfinder Village	Garden	6-Jan	Fremont, CA	1973	246		19,595			14,838			9,664			19,595			24,502			44,097			(8,827		)	35,270			18,345

Peachtree Park	Garden	Jan-96	Atlanta, GA	1969	303		4,684			11,713			12,566			4,683			24,280			28,963			(12,092		)	16,871			8,155

Peak at Vinings Mountain, The	Garden	Jan-00	Atlanta, GA	1980	280		2,651			13,660			18,412			2,651			32,072			34,723			(21,784		)	12,939			15,276

Peakview Place	Garden	Jan-00	Englewood, CO	1975	296		3,442			18,734			985			3,443			19,718			23,161			(12,555		)	10,606			12,066

Peppertree	Garden	2-Mar	Cypress, CA	1971	136		8,030			5,225			2,393			8,030			7,618			15,648			(3,733		)	11,915			12,654

Pine Lake Terrace	Garden	2-Mar	Garden Grove, CA	1971	111		4,124			6,035			2,216			4,125			8,250			12,375			(3,597		)	8,778			9,117

Plantation Gardens	Garden	Oct-99	Plantation ,FL	1971	372		3,773			19,443			18,613			3,773			38,056			41,829			(16,587		)	25,242			22,637

Post Ridge	Garden	Jul-00	Nashville, TN	1972	150		1,883			6,712			4,587			1,883			11,299			13,182			(6,609		)	6,573			5,683

Preserve at Marin	Mid Rise	11-Aug	Corte Madera, CA	1964	126		18,179			30,132			38,133			18,179			68,265			86,444			—			86,444			39,795

Ramblewood	Garden	Dec-99	Wyoming, MI	1973	1,707		8,661			61,082			10,060			8,661			71,142			79,803			(25,852		)	53,951			33,314

Ravensworth Towers	High Rise	4-Jun	Annandale, VA	1974	219		3,455			17,157			2,566			3,455			19,723			23,178			(10,593		)	12,585			22,352

Reflections	Garden	Sep-00	Virginia Beach, VA	1987	480		15,988			13,684			5,004			15,988			18,688			34,676			(9,086		)	25,590			30,374

Remington at Ponte Vedra Lakes	Garden	6-Dec	Ponte Vedra Beach, FL	1986	344		18,795			18,650			4,810			18,795			23,460			42,255			(7,819		)	34,436			23,169

River Club,The	Garden	5-Apr	Edgewater, NJ	1998	266		30,579			30,638			3,051			30,579			33,689			64,268			(11,350		)	52,918			33,049

Riverloft	High Rise	Oct-99	Philadelphia, PA	1910	184		2,120			11,287			28,203			2,120			39,490			41,610			(15,355		)	26,255			15,272

Riverside	High Rise	Apr-00	Alexandria ,VA	1973	1,222		10,493			65,474			86,890			10,492			152,365			162,857			(102,559		)	60,298			117,689

Rosewood	Garden	2-Mar	Camarillo, CA	1976	152		12,430			8,060			3,806			12,430			11,866			24,296			(4,720		)	19,576			17,230

Royal Crest Estates	Garden	2-Aug	Warwick, RI	1972	492		22,433			24,095			5,316			22,433			29,411			51,844			(15,768		)	36,076			35,878

Royal Crest Estates	Garden	2-Aug	Nashua, NH	1970	902		68,230			45,562			9,315			68,231			54,876			123,107			(32,003		)	91,104			39,468

Royal Crest Estates	Garden	2-Aug	Marlborough, MA	1970	473		25,178			28,786			6,772			25,178			35,558			60,736			(17,052		)	43,684			33,393

Royal Crest Estates	Garden	2-Aug	North Andover, MA	1970	588		51,292			36,807			17,229			51,292			54,036			105,328			(22,860		)	82,468			58,306

Runaway Bay	Garden	Oct-00	Lantana, FL	1987	404		5,935			16,052			8,712			5,934			24,765			30,699			(11,783		)	18,916			20,647

San Melia	Garden	12-Mar	Phoenix, AZ	1998	488		16,631			55,679			5,018			16,631			60,697			77,328			(3,999		)	73,329			31,570

Savannah Trace	Garden	1-Mar	Shaumburg, IL	1986	368		13,960			20,732			4,112			13,960			24,844			38,804			(11,433		)	27,371			24,985

Scotchollow	Garden	6-Jan	San Mateo, CA	1971	418		49,475			17,756			11,075			49,474			28,832			78,306			(11,197		)	67,109			46,867

Shenandoah Crossing	Garden	Sep-00	Fairfax, VA	1984	640		18,200			57,198			16,755			18,200			73,953			92,153			(39,732		)	52,421			64,844

Signal Pointe	Garden	Oct-99	Winter Park, FL	1969	368		2,392			11,358			26,388			2,392			37,746			40,138			(25,480		)	14,658			17,884

Signature Point	Garden	Nov-96	League City, TX	1994	304		2,810			17,579			2,795			2,810			20,374			23,184			(8,635		)	14,549			8,329

Springwoods at Lake Ridge	Garden	2-Jul	Woodbridge, VA	1984	180		5,587			7,284			3,292			5,587			10,576			16,163			(2,868		)	13,295			13,406

Spyglass at Cedar Cove	Garden	Sep-00	Lexington Park, MD	1985	152		3,241			5,094			2,858			3,241			7,952			11,193			(4,339		)	6,854			9,906

Stafford	High Rise	2-Oct	Baltimore, MD	1/1/1889	96		562			4,033			4,029			562			8,062			8,624			(5,261		)	3,363			4,053

Steeplechase	Garden	Sep-00	Largo, MD	1986	240		3,675			16,111			4,954			3,675			21,065			24,740			(9,981		)	14,759			—

Sterling Apartment Homes, The	Garden	Oct-99	Philadelphia, PA	1961	537		8,871			55,365			30,746			8,871			86,111			94,982			(44,305		)	50,677			72,940

Stone Creek Club	Garden	Sep-00	Germantown, MD	1984	240		13,593			9,347			6,216			13,593			15,563			29,156			(8,445		)	20,711			—

Tamarac Village	Garden	Apr-00	Denver, CO	1979	564		4,224			23,491			8,856			4,223			32,348			36,571			(19,640		)	16,931			17,596

Towers Of Westchester Park, The	High Rise	6-Jan	College Park, MD	1972	303		15,198			22,029			8,846			15,198			30,875			46,073			(9,871		)	36,202			25,955



							-2						-3
		-1					Initial Cost						Cost Capitalized			31-Dec-13
	Apartment	Date		Year	Apartment					Buildings and			Subsequent to						Buildings and			-4			Accumulated			Total Cost
Apartment Community Name	Type	Consolidated	Location	Built	Homes		Land			Improvements			Consolidation			Land			Improvements			Total			Depreciation (AD)			Net of AD			Encumbrances

Township At Highlands	Town Home	Nov-96	Centennial, CO	1985	161		1,536			9,773			6,406			1,536			16,179			17,715			(9,181		)	8,534			15,443

Twin Lake Towers	High Rise	Oct-99	Westmont, IL	1969	399		3,268			18,763			38,188			3,268			56,951			60,219			(39,046		)	21,173			32,241

Vantage Pointe	Mid Rise	2-Aug	Swampscott, MA	1987	96		4,748			10,089			984			4,749			11,072			15,821			(3,667		)	12,154			5,610

Views at Vinings Mountain, The	Garden	6-Jan	Atlanta, GA	1983	180		610			5,026			12,136			610			17,162			17,772			(14,534		)	3,238			—

Villa Del Sol	Garden	2-Mar	Norwalk, CA	1972	120		7,476			4,861			2,465			7,476			7,326			14,802			(3,799		)	11,003			11,617

Village in the Woods	Garden	Jan-00	Cypress, TX	1983	530		3,463			15,787			10,256			3,463			26,043			29,506			(16,217		)	13,289			18,552

Village of Pennbrook	Garden	Oct-98	Levittown, PA	1969	722		10,240			38,222			13,191			10,240			51,413			61,653			(28,814		)	32,839			45,689

Villages of Baymeadows	Garden	Oct-99	Jacksonville, FL	1972	904		4,860			33,956			54,761			4,860			88,717			93,577			(56,918		)	36,659			—

Villas at Park La Brea, The	Garden	2-Mar	Los Angeles, CA	2002	250		8,630			48,871			4,909			8,630			53,780			62,410			(21,127		)	41,283			23,480

Vista Del Lagos	Garden	Dec-97	Chandler, AZ	1986	200		804			4,951			3,334			804			8,285			9,089			(3,657		)	5,432			11,201

Waterford Village	Garden	2-Aug	Bridgewater, MA	1971	588		29,110			28,101			3,145			29,110			31,246			60,356			(19,908		)	40,448			38,596

Waterways Village	Garden	Jun-97	Aventura, FL	1994	180		4,504			11,064			4,413			4,504			15,477			19,981			(7,725		)	12,256			3,983

Waverly Apartments	Garden	8-Aug	Brighton, MA	1970	103		7,920			11,347			1,808			7,920			13,155			21,075			(3,211		)	17,864			12,664

Wexford Village	Garden	2-Aug	Worcester, MA	1974	264		6,349			17,939			1,165			6,349			19,104			25,453			(9,139		)	16,314			11,036

Willow Bend	Garden	May-98	Rolling Meadows, IL	1969	328		2,717			15,437			25,531			2,717			40,968			43,685			(27,326		)	16,359			18,715

Windrift	Garden	1-Mar	Oceanside, CA	1987	404		24,960			17,590			19,610			24,960			37,200			62,160			(24,444		)	37,716			42,602

Windsor Crossing	Garden	Mar-00	Newport News, VA	1978	156		131			2,110			2,944			131			5,054			5,185			(2,680		)	2,505			—

Windsor Park	Garden	1-Mar	Woodbridge, VA	1987	220		4,279			15,970			5,040			4,279			21,010			25,289			(8,724		)	16,565			18,580

Woods Of Williamsburg	Garden	6-Jan	Williamsburg, VA	1976	125		798			3,657			1,305			798			4,962			5,760			(3,776		)	1,984			—

Yacht Club at Brickell	High Rise	3-Dec	Miami, FL	1998	357		31,362			32,214			8,198			31,363			40,411			71,774			(11,061		)	60,713			49,106

Yorktown Apartments	High Rise	Dec-99	Lombard, IL	1971	364		3,055			18,162			32,723			3,055			50,885			53,940			(20,295		)	33,645			31,516

Total Conventional Apartment Communities					50,344		1,923,523			3,215,827			2,327,334			1,833,694			5,537,450			7,371,144			(2,424,839		)	4,946,305			3,941,913


Affordable Apartment Communities:
All Hallows	Garden	6-Jan	San Francisco, CA	1976	157		1,338			29,770			20,865			1,338			50,635			51,973			(25,568		)	26,405			23,289

Arvada House	High Rise	4-Nov	Arvada, CO	1977	88		405			3,314			2,310			405			5,624			6,029			(2,186		)	3,843			4,000

Bayview	Garden	5-Jun	San Francisco, CA	1976	146		582			15,265			17,474			582			32,739			33,321			(18,342		)	14,979			11,993

Beacon Hill	High Rise	2-Mar	Hillsdale, MI	1980	198		1,094			7,044			6,687			1,093			13,732			14,825			(5,802		)	9,023			6,995

Biltmore Towers	High Rise	2-Mar	Dayton, OH	1980	230		1,814			6,411			13,777			1,813			20,189			22,002			(12,276		)	9,726			10,401

Butternut Creek	Mid Rise	6-Jan	Charlotte, MI	1980	100		505			3,617			3,847			505			7,464			7,969			(5,299		)	2,670			4,051

Carriage House	Mid Rise	6-Dec	Petersburg, VA	1885-01-01	118		716			2,886			3,789			716			6,675			7,391			(3,321		)	4,070			1,892

City Line	Garden	2-Mar	Newport News, VA	1976	200		500			2,014			7,686			500			9,700			10,200			(4,431		)	5,769			4,526

Copperwood I Apartments	Garden	6-Apr	The Woodlands, TX	1980	150		383			8,373			5,529			383			13,902			14,285			(11,949		)	2,336			5,321

Copperwood II Apartments	Garden	5-Oct	The Woodlands, TX	1981	150		459			5,553			3,514			459			9,067			9,526			(5,253		)	4,273			5,490

Country Club Heights	Garden	4-Mar	Quincy, IL	1976	200		676			5,715			4,957			675			10,673			11,348			(5,276		)	6,072			6,095

Crevenna Oaks	Town Home	6-Jan	Burke, VA	1979	50		355			4,848			368			355			5,216			5,571			(2,636		)	2,935			2,803

Fairwood	Garden	6-Jan	Carmichael, CA	1979	86		177			5,264			267			176			5,532			5,708			(3,828		)	1,880			1,944

Fountain Place	Mid Rise	6-Jan	Connersville, IN	1980	102		378			2,091			3,038			378			5,129			5,507			(1,419		)	4,088			1,007

Friendset Apartments	High Rise	6-Jan	Brooklyn, NY	1979	259		550			16,304			1,540			550			17,844			18,394			(10,087		)	8,307			13,099

Hopkins Village	Mid Rise	3-Sep	Baltimore, MD	1979	165		549			5,973			3,613			549			9,586			10,135			(3,455		)	6,680			9,100

Hudson Gardens	Garden	2-Mar	Pasadena, CA	1983	41		914			1,548			1,287			914			2,835			3,749			(941		)	2,808			3,096

Ingram Square	Garden	6-Jan	San Antonio, TX	1980	120		800			3,136			5,769			800			8,905			9,705			(4,623		)	5,082			3,493

Kirkwood House	High Rise	4-Sep	Baltimore, MD	1979	261		1,337			9,358			8,585			1,338			17,942			19,280			(6,655		)	12,625			16,000

La Salle	Garden	Oct-00	San Francisco, CA	1976	145		1,866			19,567			17,716			1,866			37,283			39,149			(22,769		)	16,380			18,053

La Vista	Garden	6-Jan	Concord, CA	1981	75		581			4,449			4,296			581			8,745			9,326			(2,805		)	6,521			5,155

Loring Towers	High Rise	2-Oct	Minneapolis, MN	1975	230		886			7,445			8,262			886			15,707			16,593			(6,631		)	9,962			9,891

Loring Towers Apartments	High Rise	3-Sep	Salem, MA	1973	250		187			14,050			7,424			187			21,474			21,661			(7,857		)	13,804			11,035

Montblanc Gardens	Town Home	3-Dec	Yauco, PR	1982	128		390			3,859			653			391			4,511			4,902			(2,697		)	2,205			—



							-2						-3
		-1					Initial Cost						Cost Capitalized			31-Dec-13
	Apartment	Date		Year	Apartment					Buildings and			Subsequent to						Buildings and			-4			Accumulated			Total Cost
Apartment Community Name	Type	Consolidated	Location	Built	Homes		Land			Improvements			Consolidation			Land			Improvements			Total			Depreciation (AD)			Net of AD			Encumbrances

New Baltimore	Mid Rise	2-Mar	New Baltimore, MI	1980	101		896			2,360			5,211			896			7,571			8,467			(3,348		)	5,119			2,067

Newberry Park	Garden	Dec-97	Chicago, IL	1995	84		1,380			7,632			445			1,380			8,077			9,457			(3,466		)	5,991			6,946

Northpoint	Garden	Jan-00	Chicago, IL	1921	304		2,510			14,334			16,870			2,510			31,204			33,714			(21,833		)	11,881			17,943

Panorama Park	Garden	2-Mar	Bakersfield, CA	1982	66		521			5,520			1,085			521			6,605			7,126			(2,848		)	4,278			1,995

Parc Chateau I	Garden	6-Jan	Lithonia, GA	1973	86		592			1,442			326			592			1,768			2,360			(1,732		)	628			99

Parc Chateau II	Garden	6-Jan	Lithonia, GA	1974	88		596			2,965			293			596			3,258			3,854			(2,555		)	1,299			100

Park Place	Mid Rise	5-Jun	St Louis, MO	1977	242		705			6,327			10,151			705			16,478			17,183			(12,130		)	5,053			8,918

Parkways, The	Garden	4-Jun	Chicago, IL	1925	446		3,426			23,257			20,458			3,427			43,714			47,141			(22,403		)	24,738			18,797

Pavilion	High Rise	4-Mar	Philadelphia, PA	1976	296		—			15,415			1,905			—			17,320			17,320			(7,504		)	9,816			7,475

Pleasant Hills	Garden	5-Apr	Austin, TX	1982	100		1,229			2,631			3,573			1,229			6,204			7,433			(3,061		)	4,372			3,048

Plummer Village	Mid Rise	2-Mar	North Hills, CA	1983	75		666			2,647			1,685			667			4,331			4,998			(2,702		)	2,296			2,433

Riverwoods	High Rise	6-Jan	Kankakee, IL	1983	125		598			4,931			3,539			598			8,470			9,068			(2,845		)	6,223			3,565

Round Barn Manor	Garden	2-Mar	Champaign, IL	1979	156		810			5,134			5,946			810			11,080			11,890			(2,923		)	8,967			4,592

San Jose Apartments	Garden	5-Sep	San Antonio, TX	1970	220		234			5,770			11,859			234			17,629			17,863			(7,881		)	9,982			4,540

San Juan Del Centro	Mid Rise	5-Sep	Boulder, CO	1971	150		439			7,110			12,822			440			19,931			20,371			(8,834		)	11,537			11,998

Shoreview	Garden	Oct-99	San Francisco, CA	1976	156		1,476			19,071			19,256			1,476			38,327			39,803			(24,049		)	15,754			19,371

South Bay Villa	Garden	2-Mar	Los Angeles, CA	1981	80		1,352			2,770			3,850			1,352			6,620			7,972			(5,412		)	2,560			2,867

St. George Villas	Garden	6-Jan	St. George, SC	1984	40		107			1,025			349			107			1,374			1,481			(1,062		)	419			420

Stonegate Apts	Mid Rise	9-Jul	Indianapolis, IN	1920	52		122			1,920			486			122			2,406			2,528			(1,145		)	1,383			1,852

Summit Oaks	Town Home	6-Jan	Burke, VA	1980	50		381			4,930			391			382			5,320			5,702			(2,534		)	3,168			2,794

Tamarac Pines Apartments I	Garden	4-Nov	Woodlands, TX	1980	144		363			2,775			3,845			363			6,620			6,983			(3,358		)	3,625			3,878

Tamarac Pines Apartments II	Garden	4-Nov	Woodlands, TX	1980	156		266			3,195			4,248			266			7,443			7,709			(3,830		)	3,879			4,201

Terry Manor	Mid Rise	5-Oct	Los Angeles, CA	1977	170		1,997			5,848			6,754			1,997			12,602			14,599			(9,098		)	5,501			6,517

Tompkins Terrace	Garden	2-Oct	Beacon, NY	1974	193		872			6,827			13,782			872			20,609			21,481			(7,952		)	13,529			7,126

University Square	High Rise	5-Mar	Philadelphia, PA	1978	442		702			12,201			9,925			702			22,126			22,828			(8,836		)	13,992			17,494

Van Nuys Apartments	High Rise	2-Mar	Los Angeles, CA	1981	299		3,576			21,226			21,634			3,576			42,860			46,436			(14,213		)	32,223			24,714

Verdes Del Oriente	Garden	10-Jan	San Pedro, CA	1976	113		1,139			7,044			55			1,139			7,099			8,238			(3,151		)	5,087			4,984

Villas of Mount Dora (5)	Garden	10-Jan	Mt. Dora, FL	1979	70		322			1,828			290			328			1,585			1,913			(995		)	918			1,480

Wah Luck House	High Rise	6-Jan	Washington, DC	1982	153		—			7,772			704			—			8,476			8,476			(2,554		)	5,922			6,823

Walnut Hills	High Rise	6-Jan	Cincinnati, OH	1983	198		826			5,608			5,505			826			11,113			11,939			(4,487		)	7,452			5,445

Washington Square West	Mid Rise	4-Sep	Philadelphia, PA	1982	132		582			11,169			6,814			582			17,983			18,565			(12,831		)	5,734			3,630

Whitefield Place	Garden	5-Apr	San Antonio, TX	1980	80		219			3,151			2,760			219			5,911			6,130			(3,150		)	2,980			2,114

Winter Gardens	High Rise	4-Mar	St Louis, MO	1920	112		300			3,072			4,662			300			7,734			8,034			(2,268		)	5,766			3,515

Woodland Hills	Garden	5-Oct	Jackson, MI	1980	125		320			3,875			4,569			321			8,443			8,764			(4,937		)	3,827			3,402

Total Affordable Apartment Communities					8,953		46,966			420,636			359,300			46,975			779,400			826,375			(398,033		)	428,342			395,872

Other (6)					—		689			15,873			—			689			15,873			16,562			—			16,562			—

Total					59,297		$	1,971,178		$	3,652,336		$	2,686,634		$	1,881,358		$	6,332,723		$	8,214,081		$	(2,822,872	)	$	5,391,209		$	4,337,785


(1) Date we acquired the apartment property or first consolidated the partnership which owns the apartment community.
(2) For 2008 and prior periods, costs to acquire the noncontrolling interest’s share of our consolidated real estate partnerships were capitalized as part of the initial cost.
(3) Costs capitalized subsequent to consolidation includes costs capitalized since acquisition or first consolidation of the partnership/apartment community.
(4) The aggregate cost of land and depreciable property for federal income tax purposes was approximately $3.7 billion at December 31, 2013.
(5) The current carrying value of the apartment community reflects an impairment loss recognized during the current period or prior periods.
(6) Other includes land parcels and development costs.
APARTMENT INVESTMENT AND MANAGEMENT COMPANY
AIMCO PROPERTIES, L.P.
SCHEDULE III: REAL ESTATE AND ACCUMULATED DEPRECIATION
For the Years Ended December 31, 2013, 2012 and 2011
(In Thousands)



	2013				2012				2011
Real Estate	$	8,333,419			$	8,917,137			$	9,468,165
Balance at beginning of year
Additions during the year:
Acquisitions	66,058				131,374				44,681

Capital additions	376,038				272,103				207,263

Deductions during the year:
Casualty and other write-offs (1)	(98,489		)		(62,589		)		(192,542		)
Reclassification of real estate included in sale of asset management business (Note 3)	—				(160,420		)		—

Sales	(462,945		)		(764,186		)		(610,430		)
Balance at end of year	$	8,214,081			$	8,333,419			$	8,917,137

Accumulated Depreciation	$	2,820,765			$	2,872,190			$	2,934,912
Balance at beginning of year
Additions during the year:
Depreciation	288,666				353,414				382,213

Deductions during the year:
Casualty and other write-offs (1)	(92,775		)		(46,869		)		(173,941		)
Reclassification of real estate included in sale of asset management business (Note 3)	—				(33,394		)		—

Sales	(193,784		)		(324,576		)		(270,994		)
Balance at end of year	$	2,822,872			$	2,820,765			$	2,872,190


-1	Includes the write-off of fully depreciated assets totaling $91.9 million, $38.7 million and $165.9 million, during the years ended December 31, 2013, 2012 and 2011, respectively.

Basis_of_Presentation_and_Summ1

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

12 Months Ended

Dec. 31, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation

Aimco’s accompanying consolidated financial statements include the accounts of Aimco, the Aimco Operating Partnership, and their consolidated subsidiaries. The Aimco Operating Partnership’s 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 December 31, 2013, we were the primary beneficiary of, and therefore consolidated, 63 VIEs, which owned 49 apartment communities with 7,656 apartment homes. Substantially all of these VIEs are partnerships that operate 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 net book value of $392.2 million collateralized $355.4 million of debt of those VIEs. Any significant amounts of assets and liabilities related to our consolidated VIEs are identified parenthetically on our accompanying consolidated balance sheets. The creditors of the consolidated VIEs do not have recourse to our general credit.

In addition to the VIEs discussed above, at December 31, 2013, 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 3. 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 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.

As used herein, and except where the context otherwise requires, “partnership” refers to a limited partnership or a limited liability company and “partner” refers to a partner in a limited partnership or a member of a limited liability company.

Variable Interest Entities

Acquisition of Real Estate Assets and Related Depreciation and Amortization

We recognize at fair value the acquisition of apartment communities or interests in partnerships that own apartment communities if the transaction results in consolidation and we expense as incurred most related transaction costs. We allocate the cost of acquired apartment communities to tangible assets and identified intangible assets based on their fair values. We determine the fair value of tangible assets, such as land, building, furniture, fixtures and equipment, generally using internal valuation techniques that consider comparable market transactions, discounted cash flow techniques, replacement costs and other available information. We determine the fair value of identified intangible assets (or liabilities), which typically relate to in-place leases, using internal valuation techniques that consider the terms of the in-place leases, current market data for comparable leases, and our experience in leasing similar communities. The intangible assets or liabilities related to in-place leases are comprised of:

The value of the above- and below-market leases in-place. An asset or liability is recognized based on the difference between (a) the contractual amounts to be paid pursuant to the in-place leases and (b) our estimate of fair market lease rates for the corresponding in-place leases, measured over the period, including estimated lease renewals for below-market leases, that the leases are expected to remain in effect.

The estimated unamortized portion of avoided leasing commissions and other costs that ordinarily would be incurred to originate the in-place leases.

The value associated with vacant apartment homes during the absorption period (estimates of lost rental revenue during the expected lease-up periods based on current market demand and stabilized occupancy levels).

The values of the above- and below-market leases are amortized to rental revenue over the expected remaining terms of the associated leases, which include reasonably assured renewal periods. Other intangible assets related to in-place leases are amortized to depreciation and amortization over the expected remaining terms of the associated leases. We prospectively adjust the amortization period to reflect significant variances between actual lease termination activity as compared to those used to determine the historical amortization periods.

Depreciation for all tangible real estate assets is calculated using the straight-line method over their estimated useful lives. Acquired buildings and improvements are depreciated over a useful life based on the age, condition and other physical characteristics of the apartment community. At December 31, 2013, the weighted average depreciable life of our acquired buildings and improvements was approximately 30 years. As discussed below under the Impairment of Long Lived Assets heading, we may adjust depreciation of apartment communities that are expected to be disposed of or demolished prior to the end of their useful lives. Furniture, fixtures and equipment associated with acquired apartment communities are depreciated over five years.

At December 31, 2013 and 2012, deferred income in our consolidated balance sheets includes below-market lease amounts totaling $16.9 million and $19.8 million, respectively, which are net of accumulated amortization of $35.9 million and $33.0 million, respectively. During the years ended December 31, 2013, 2012 and 2011, we included amortization of below-market leases of $2.9 million, $3.8 million and $4.3 million, respectively, in rental and other property revenues in our consolidated statements of operations. At December 31, 2013, our below-market leases had a weighted average amortization period of 6.5 years and estimated aggregate amortization for each of the five succeeding years as follows (in thousands):

2014

2015

2016

2017

2018

Estimated amortization

2,270

2,016

1,757

1,550

1,331

Capital Additions and Related Depreciation

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 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.

We depreciate capitalized costs using the straight-line method over the estimated useful life of the related component or improvement, which is generally 5, 15 or 30 years. All capitalized site payroll and indirect costs are allocated proportionately, based on direct costs, among capital projects and depreciated over the estimated useful lives of such projects.

Certain homogeneous items that are purchased in bulk on a recurring basis, such as carpeting and appliances, are depreciated using group methods that reflect the average estimated useful life of the items in each group. Except in the case of apartment community casualties, where the net book value of the lost asset is written off in the determination of casualty gains or losses, we generally do not recognize any loss in connection with the replacement of an existing apartment community component because normal replacements are considered in determining the estimated useful lives used in connection with our composite and group depreciation methods.

For the years ended December 31, 2013, 2012 and 2011, for continuing and discontinued operations, we capitalized to buildings and improvements $17.6 million, $16.6 million and $14.0 million of interest costs, respectively, and $33.2 million, $33.7 million and $29.0 million of other direct and indirect costs, respectively.

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 aggregate undiscounted future cash flows, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the apartment property.

Based on periodic tests of recoverability of long-lived assets, for the year ended December 31, 2012, we recorded a provision for real estate impairment losses of $6.2 million related to apartment communities classified as held for use, and we recorded no such provisions during the years ended December 31, 2013 or 2011.

Discontinued Operations

We classify certain apartment communities and related assets and liabilities as held for sale when they meet certain criteria, as defined in GAAP. The operating results of such apartment communities as well as those communities sold during the periods presented are included in discontinued operations in both current periods and all comparable periods presented. Depreciation is not recorded on apartment communities once they have been classified as held for sale; however, depreciation expense recorded prior to classification as held for sale is included in discontinued operations. The net gain on sale and any impairment losses are presented in discontinued operations when recognized. See Note 12 for additional information regarding discontinued operations.

Cash Equivalents

We classify highly liquid investments with an original maturity of three months or less as cash equivalents.

Restricted Cash

Restricted cash includes capital replacement reserves, completion repair reserves, bond sinking fund amounts, tax and insurance escrow accounts held by lenders and resident security deposits.

Notes Receivable

At December 31, 2012, our notes receivable were primarily comprised of second mortgages collateralized by apartment communities in New York City, which, as further described in Note 3, were repaid during 2013.

Deferred Costs

We defer lender fees and other direct costs incurred in obtaining new financing and amortize the amounts over the terms of the related loan agreements. Amortization of these costs is included in interest expense.

We defer leasing commissions and other direct costs incurred in connection with successful leasing efforts and amortize the costs over the terms of the related leases. Amortization of these costs is included in depreciation and amortization.

Investments

Investments in Unconsolidated Real Estate Partnerships

We own general and limited partner interests in partnerships that either directly, or through interests in other real estate partnerships, own apartment communities. We generally account for investments in real estate partnerships that we do not consolidate under the equity method. Under the equity method, our share of the earnings or losses of the entity for the periods being presented is included in equity in earnings or losses from unconsolidated real estate partnerships, inclusive of our share of any impairments and disposition gains recognized by and related to such entities.

The excess of the cost of the acquired partnership interests over the historical carrying amount of partners’ equity or deficit is ascribed generally to the fair values of land and buildings owned by the partnerships. We amortize the excess cost related to the buildings over the estimated useful lives of the buildings. Such amortization is recorded as a component of equity in earnings (losses) of unconsolidated real estate partnerships.

Investments in Securitization Trust that Holds Aimco Property Debt

We hold an investment in the first loss and mezzanine positions in a securitization trust which primarily holds certain of our property debt. These investments were initially recognized at their purchase price and the discount to the face value is being accreted into interest income over the expected term of the securities. We have designated these investments as available for sale securities and we measure these investments at fair value with changes in their fair value, other than the changes attributed to the accretion described above, recognized as an adjustment of accumulated other comprehensive income or loss within equity and partners’ capital.

Intangible Assets

At December 31, 2013 and 2012, other assets included goodwill associated with our reportable segments of $49.0 million, and at December 31, 2012 assets held for sale included $5.5 million of goodwill allocated to apartment communities sold during 2013. We perform an annual impairment test of goodwill that compares the fair value of reporting units with their carrying amounts, including goodwill. We determined that our goodwill was not impaired in 2013, 2012 or 2011.

During the years ended December 31, 2013, 2012 and 2011, we allocated $5.5 million, $7.5 million and $5.1 million, respectively, of goodwill related to our reportable segments (conventional and affordable real estate operations) to the carrying amounts of the apartment communities sold or classified as held for sale. The amounts of goodwill allocated to these apartment communities were based on the relative fair values of the apartment communities sold or classified as held for sale and the retained portions of the reporting units to which the goodwill as allocated.

Intangible assets also includes amounts related to in-place leases as discussed under the Acquisition of Real Estate Assets and Related Depreciation and Amortization heading.

Capitalized Software Costs

Purchased software and other costs related to software developed for internal use are capitalized during the application development stage and are amortized using the straight-line method over the estimated useful life of the software, generally five years. For the years ended December 31, 2013, 2012 and 2011, we capitalized software purchase and development costs totaling $3.3 million, $5.8 million and $12.6 million, respectively. At December 31, 2013 and 2012, other assets included $22.0 million and $27.5 million of net capitalized software, respectively. During the years ended December 31, 2013, 2012 and 2011, we recognized amortization of capitalized software of $8.9 million, $10.0 million and $8.7 million, respectively, which is included in depreciation and amortization in our consolidated statements of operations.

Noncontrolling Interests in Consolidated Real Estate Partnerships

We report the unaffiliated partners’ interests in the net assets of our consolidated real estate partnerships as noncontrolling interests in consolidated real estate partnerships within consolidated equity and partners’ capital. Noncontrolling interests in consolidated real estate partnerships consist primarily of equity interests held by limited partners in consolidated real estate partnerships that have finite lives. We generally attribute to noncontrolling interests their share of income or loss of consolidated partnerships based on their proportionate interest in the results of operations of the partnerships, including their share of losses even if such attribution results in a deficit noncontrolling interest balance within our equity and partners’ capital accounts.

The terms of the related partnership agreements generally require the partnerships to be liquidated following the sale of the underlying real estate. As the general partner in these partnerships, we ordinarily control the execution of real estate sales and other events that could lead to the liquidation, redemption or other settlement of noncontrolling interests. However, as discussed in Note 3, we continue to consolidate certain partnerships and apartment communities associated with the legacy asset management business for which the derecognition criteria associated with our sale of the portfolio have not been met. We do not control the execution of sales and other events related to the assets that will lead to the to the liquidation of these partnerships and derecognition of the associated noncontrolling interests. The aggregate carrying amount of noncontrolling interests in consolidated real estate partnerships totaled $233.0 million and $271.1 million at December 31, 2013 and 2012, respectively, of which $35.8 million and $57.2 million, respectively, was associated with noncontrolling interests in the legacy asset management business.

Changes in our ownership interest in consolidated real estate partnerships generally consist of our purchase of an additional interest in or the sale of our entire interest in a consolidated real estate partnership. The effect on our equity and partners’ capital of our purchase of additional interests in consolidated real estate partnerships during the years ended December 31, 2013, 2012 and 2011 is shown in our consolidated statements of equity and partners’ capital and further discussed in Note 3. The effect on our equity and partners' capital of sales of consolidated real estate or sales of our entire interest in consolidated real estate partnerships is reflected in our consolidated financial statements as sales of real estate and accordingly the effect on our equity and partners’ capital is reflected within the the amount of net income attributable to us and to noncontrolling interests. In accordance with FASB Accounting Standards Codification, or ASC, Topic 810, upon our deconsolidation of a real estate partnership following the sale of our partnership interests or liquidation of the partnership following sale of the related apartment community, we derecognize any remaining noncontrolling interest of the associated partnership previously recorded in our consolidated balance sheet.

Noncontrolling Interests in Aimco Operating Partnership

Noncontrolling interests in Aimco Operating Partnership consist of common OP Units, HPUs and preferred OP Units. Within Aimco’s consolidated financial statements, the Aimco Operating Partnership’s income or loss is allocated to the holders of common partnership units and equivalents based on the weighted average number of common partnership units (including those held by Aimco) and equivalents outstanding during the period. During the years ended December 31, 2013, 2012 and 2011, the holders of common OP Units and equivalents had a weighted average ownership interest in the Aimco Operating Partnership of 5.2%, 5.7% and 6.6%, respectively. Holders of the preferred OP Units participate in the Aimco Operating Partnership’s income or loss only to the extent of their preferred distributions. See Note 10 for further information regarding the items comprising noncontrolling interests in the Aimco Operating Partnership.

Revenue Recognition

Our apartment communities have operating leases with apartment residents with terms averaging 12 months. We recognize rental revenue related to these leases, net of any concessions, on a straight-line basis over the term of the lease. We recognize revenues from property management, asset management, syndication and other services when the related fees are earned and are realized or realizable.

Insurance

We believe that our insurance coverages insure our apartment communities adequately against the risk of loss attributable to fire, earthquake, hurricane, tornado, flood, and other perils. In addition, we have insurance coverage for substantial portions of our property, workers’ compensation, health, and general liability exposures. Losses are accrued based upon our estimates of the aggregate liability for uninsured losses incurred using certain actuarial assumptions followed in the insurance industry and based on our experience.

Stock-Based Compensation

Share-Based Compensation

We recognize all share-based employee compensation, including grants of employee stock options, in the consolidated financial statements based on the grant date fair value and recognize compensation cost, net of forfeitures, ratably over the awards’ requisite service period. See Note 11 for further discussion of our share-based compensation.

Tax Credit Arrangements

We sponsor certain 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. The tax credits are generally realized ratably over the first ten years of the tax credit arrangement and are subject to the partnership’s compliance with applicable laws and regulations for a period of 15 years. Typically, we are the general partner with a legal ownership interest of one percent or less and unaffiliated institutional investors (which we refer to as tax credit investors or investors) acquire the limited partnership interests (at least 99%). At inception, each investor agrees to fund capital contributions to the partnerships and we receive a syndication fee from the partnerships upon the investors’ admission to the partnership.

We have determined that the partnerships in these arrangements are VIEs and, where we are general partner, we are generally the primary beneficiary that is required to consolidate the partnerships. When the contractual arrangements obligate us to deliver tax benefits to the investors, and entitle us through fee arrangements to receive substantially all available cash flow from the partnerships, we account for these partnerships as wholly-owned subsidiaries, recognizing the income or loss generated by the underlying real estate based on our economic interest in the partnerships. Capital contributions received by the partnerships from tax credit investors represent, in substance, consideration that we receive in exchange for our obligation to deliver tax credits and other tax benefits to the investors. We record these contributions as deferred income in our consolidated balance sheet upon receipt, and we recognize the receipts as revenue in our consolidated statements of operations when our obligation to the investors is relieved upon delivery of the tax benefits.

Income Taxes

We have elected to be taxed as a REIT under the Code commencing with our taxable year ended December 31, 1994, and intend to continue to operate in such a manner. Our current and continuing qualification as a REIT depends on our ability to meet the various requirements imposed by the Code, which are related to organizational structure, distribution levels, diversity of stock ownership and certain restrictions with regard to owned assets and categories of income. If we qualify for taxation as a REIT, we will generally not be subject to United States Federal corporate income tax on our taxable income that is currently distributed to stockholders. This treatment substantially eliminates the “double taxation” (at the corporate and stockholder levels) that generally results from an investment in a corporation.

Even if we qualify as a REIT, we may be subject to United States Federal income and excise taxes in various situations, such as on our undistributed income. We also will be required to pay a 100% tax on any net income on non-arm’s length transactions between us and a TRS (described below) and on any net income from sales of apartment communities that were held for sale to customers in the ordinary course. In addition, we could also be subject to the alternative minimum tax, or AMT, on our items of tax preference. The state and local tax laws may not conform to the United States Federal income tax treatment, and we and our stockholders may be subject to state or local taxation in various state or local jurisdictions, including those in which we transact business or our stockholders reside. Any taxes imposed on us reduce our operating cash flow and net income.

Certain of our operations or a portion thereof, including property management, asset management and risk management, are conducted through taxable REIT subsidiaries, which are subsidiaries of the Aimco Operating Partnership, and each of which we refer to as a TRS. A TRS is a subsidiary C-corporation that has not elected REIT status and as such is subject to United States Federal corporate income tax. We use TRS entities to facilitate our ability to offer certain services and activities to our residents and investment partners that cannot be offered directly by a REIT. We also use TRS entities to hold investments in certain apartment communities.

For our TRS entities, deferred income taxes result from temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for Federal income tax purposes, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences reverse. We reduce deferred tax assets by recording a valuation allowance when we determine based on available evidence that it is more likely than not that the assets will not be realized. We recognize the tax consequences associated with intercompany transfers between the REIT and TRS entities when the related assets are sold to third parties, impaired or otherwise disposed of for financial reporting purposes. Refer to Note 8 for further information about our income taxes.

Comprehensive Income or Loss

As discussed under the preceding Investments in Available for Sale Securities heading, we have investments that are measured at fair value with unrealized gains or losses recognized as an adjustment of accumulated other comprehensive loss within equity and partners’ capital. Additionally, as discussed in Note 6, we recognize changes in the fair value of our cash flow hedges as an adjustment of accumulated other comprehensive loss within equity and partners’ capital. The amounts of consolidated comprehensive income or loss for the years ended December 31, 2013, 2012 and 2011, along with the corresponding amounts of such comprehensive income or loss attributable to Aimco, the Aimco Operating Partnership and to noncontrolling interests, is presented within the accompanying consolidated statements of comprehensive income or loss.

Earnings Per Share

Earnings per Share and Unit

Aimco calculates earnings (loss) 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 Aimco Operating Partnership calculates earnings (loss) 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 partnership units and HPUs, which have identical rights to distributions and undistributed earnings, to be common units for purposes of the earnings per unit computations. See Note 13 for further information regarding earnings per share and unit computations.

Use of Estimates

The preparation of our 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.

Reclassifications and Adjustments

Certain items included in the 2012 and 2011 financial statements have been reclassified to conform to the current presentation, including adjustments for discontinued operations.

Fair_Value_Measurements_Polici

Fair Value Measurements (Policies)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	Fair Value Measurements
	In accordance with GAAP, we are required to measure certain assets and liabilities in our consolidated financial statements at fair value. We are required to classify fair value measurements into one of three categories, based on the nature of the inputs used in the fair value measurement. Level 1 of the hierarchy includes fair value measurements based on unadjusted quoted prices in active markets for identical assets or liabilities we can access at the measurement date. Level 2 includes fair value measurements based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 includes fair value measurements based on unobservable inputs. The classification of fair value measurements is subjective and GAAP requires disclosure of more detailed information regarding fair value measurements classified within the lower levels of the hierarchy.
	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 (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 fair value hierarchy, is presented below (in thousands):


		AFS Investments			Interest Rate Swaps			Total
	Fair value at December 31, 2011	$	51,693		$	(7,012	)	$	44,681

	Investment accretion	3,111			—			3,111

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,673			1,673

	Unrealized gains (losses) included in equity and partners’ capital	4,341			(2,581		)	1,760

	Fair value at December 31, 2012	$	59,145		$	(7,968	)	$	51,177

	Investment accretion	3,451			—			3,451

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,678			1,678

	Unrealized (losses) gains included in equity and partners’ capital	(4,188		)	1,734			(2,454		)

	Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804

	Our investments classified as AFS are presented within other assets in the accompanying consolidated balance sheets. We estimate the fair value of these investments 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. 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 December 31, 2013, was approximately 7.4 years. Our amortized cost basis for these investments, which represents the original cost adjusted for interest accretion less interest payments received, was $59.8 million and $56.3 million at December 31, 2013 and 2012, respectively. The amortized cost exceeded the fair value of these investments at December 31, 2013, primarily due to increases in market interest rates and a decrease in demand for similar investments as compared to when we purchased the investments. We currently expect to hold 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 these investments is temporary and we have not recognized any of the loss 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 December 31, 2013 and 2012, we had interest rate swaps with aggregate notional amounts of $50.7 million and $51.0 million, respectively. As of December 31, 2013 these swaps had a weighted average remaining term of 7.0 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 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 December 31, 2013 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.

Basis_of_Presentation_and_Summ2

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Schedule of Other Assets	'


		2013			2012
	Deferred financing costs, net	$	36,641		$	37,312
	Deferred financing costs, net	$	36,641		$	37,312
	Investments in unconsolidated real estate partnerships	16,930			18,753
	Investments in unconsolidated real estate partnerships	16,930			18,753
	Investments in securitization trust that holds Aimco property debt	58,408			59,145
		58,408			59,145
	Intangible assets, net	50,025			50,322
	Intangible assets, net	50,025			50,322
	Deferred tax asset, net (Note 8)	30,353			44,828
	Deferred tax asset, net (Note 8)	30,353			44,828
	Assets related to the legacy asset management business (Note 3)	163,849			176,756
		163,849			176,756
	Prepaid expenses, accounts receivable, deposits and other	146,065			156,662
	Prepaid expenses, accounts receivable, deposits and other	146,065			156,662
	Other assets per consolidated balance sheets	$	502,271		$	543,778
	Other assets per consolidated balance sheets	$	502,271		$	543,778
Schedule of expected amortization of deferred revenue leases	'


			2014			2015		2016		2017		2018
	Estimated amortization		$	2,270		$	2,016	$	1,757	$	1,550	$	1,331
	Estimated amortization		$	2,270		$	2,016	$	1,757	$	1,550	$	1,331

Significant_Transactions_Table

Significant Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Investments in Real Estate and Other Significant Transactions [Abstract]	'
Real Estate Investment Financial Statements, Disclosure	'
	The portfolio’s assets and liabilities included in other assets in our consolidated balance sheets are summarized below (in thousands).


		December 31,
		2013			2012
	Real estate, net	$	120,175		$	125,065

	Cash and cash equivalents and restricted cash	29,046			31,558

	Investment in unconsolidated real estate partnerships	10,817			15,987

	Other assets	3,811			4,146

	Total assets	$	163,849		$	176,756


	Total indebtedness	$	106,032		$	107,562

	Accrued and other liabilities	19,263			29,422

	Total liabilities	125,295			136,984


	Noncontrolling interests in consolidated real estate partnerships	35,818			57,208

	Equity attributable to Aimco and the Aimco Operating Partnership	2,736			(17,436		)

	Total liabilities and equity	$	163,849		$	176,756

Statement of Income Related to Legally Sold Portfolio [Table Text Block]	'


		2013
	Revenues	$	23,711

	Expenses	(21,188		)
	Equity in earnings or loss of unconsolidated entities, gains or losses on dispositions and other, net	(748		)
	Net income related to legacy asset management business	1,775

	Income tax expense associated with legacy asset management business	(639		)
	Noncontrolling interests in consolidated real estate partnerships	21,370

	Net income of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$	22,506

Schedule of Acquisition of Conventional Properties	'
	Summarized information regarding these acquisitions is set forth in the table below (dollars in thousands):


		Year Ended December 31,
		2013			2012
	Number of apartment homes	134			614

	Acquisition price	$	53,575		$	126,873

	Non-recourse property debt assumed (outstanding principal balance)	12,446			38,819

	Non-recourse property debt assumed (fair value)	14,767			43,938

	Total fair value allocated to real estate	55,896			130,547

Noncontrolling Interests In Consolidated Real Estate Partnerships	'


		Year Ended December 31,
		2013			2012			2011
	Consolidated partnerships in which remaining limited partnership interests were acquired	3			11			12

	Number of apartment communities owned by partnerships	5			17			15

	Cost of limited partnership interests acquired	$	17,900		$	50,654		$	22,305

	Excess of consideration paid over the carrying amount of noncontrolling interests acquired	17,170			44,777			36,260

Investments_in_Unconsolidated_1

Investments in Unconsolidated Real Estate Partnerships (Tables)	12 Months Ended
	Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]	'
Financial information for the unconsolidated real estate partnerships	'
	The following table provides selected combined financial information for the unconsolidated real estate partnerships in which we had investments accounted for under the equity method as of and for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013			2012			2011
	Real estate, net of accumulated depreciation	$	88,014		$	107,419		$	429,780

	Total assets	93,242			114,658			472,904

	Non-recourse property debt and other notes payable	60,660			122,019			321,236

	Total liabilities	64,859			132,767			455,591

	Partners’ capital (deficit)	28,383			(18,109		)	17,313

	Rental and other property revenues	16,268			72,636			114,974

	Property operating expenses	(8,470		)	(49,331		)	(75,934		)
	Depreciation and amortization	(3,300		)	(18,388		)	(26,323		)
	Interest expense	(4,185		)	(21,354		)	(27,108		)
	Gain on sale and impairment losses, net	36,212			(4,140		)	22,598

	Net income (loss)	35,909			(21,108		)	6,773

NonRecourse_Property_Debt_and_1

Non-Recourse Property Debt and Credit Agreement (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Instrument [Line Items]	'
Scheduled principal amortization and maturity payments	'
	As of December 31, 2013, the scheduled principal amortization and maturity payments for our non-recourse property debt related to apartment communities in continuing operations are as follows (in thousands):


		Amortization				Maturities				Total
	2014	$	88,010			$	82,192			$	170,202

	2015	88,424				183,317				271,741

	2016	85,380				465,321				550,701

	2017	79,223				398,320				477,543

	2018	74,232				238,253				312,485

	Thereafter									2,555,113

										$	4,337,785

Property Notes Payable	'
Debt Instrument [Line Items]	'
Summarizes property loans payable related to properties classified as held for use	'
	The following table summarizes our property debt related to assets classified as held for use at December 31, 2013 and 2012 (dollars in thousands):


		Weighted Average Interest Rate		Principal
				Outstanding
		2013		2013				2012
	Fixed rate property debt	5.46%		$	4,107,141			$	4,181,821

	Variable rate property debt	2.92%		13,099				13,443

	Total			$	4,120,240			$	4,195,264

Property Tax Exempt Bonds Payable	'
Debt Instrument [Line Items]	'
Summarizes property loans payable related to properties classified as held for use	'
	The following table summarizes our property tax-exempt bond financings related to assets classified as held for use at December 31, 2013 and 2012 (dollars in thousands):


		Weighted Average Interest Rate		Principal
				Outstanding
		2013		2013				2012
	Fixed rate property tax-exempt debt	4.87%		$	85,634			$	87,220

	Variable rate property tax-exempt debt	1.09%		131,911				130,599

	Total			$	217,545			$	217,819

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair value of assets and liabilities measured on a recurring basis	'
	Information regarding these items measured at fair value, both of which are classified within Level 2 of the fair value hierarchy, is presented below (in thousands):


		AFS Investments			Interest Rate Swaps			Total
	Fair value at December 31, 2011	$	51,693		$	(7,012	)	$	44,681

	Investment accretion	3,111			—			3,111

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,673			1,673

	Unrealized gains (losses) included in equity and partners’ capital	4,341			(2,581		)	1,760

	Fair value at December 31, 2012	$	59,145		$	(7,968	)	$	51,177

	Investment accretion	3,451			—			3,451

	Unrealized losses included in interest expense	—			(48		)	(48		)

	Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	—			1,678			1,678

	Unrealized (losses) gains included in equity and partners’ capital	(4,188		)	1,734			(2,454		)

	Fair value at December 31, 2013	$	58,408		$	(4,604	)	$	53,804

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Approximate minimum annual rentals under operating lease obligations and sublease receivables	'
	Approximate minimum annual rental payments under operating leases are as follows (in thousands):


		Operating Lease Obligations
	2014	$	3,249

	2015	2,442

	2016	2,249

	2017	1,985

	2018	841

	Total	$	10,766

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Components of deferred tax liabilities and assets	'
	Significant components of our deferred tax liabilities and assets are as follows (in thousands):


		December 31,
		2013			2012
	Deferred tax liabilities:
	Partnership differences	$	50,290		$	29,745

	Deferred revenue	25,596			23,139

	Capitalized interest	11,424			16,157

	Other	49			—

	Total deferred tax liabilities	$	87,359		$	69,041


	Deferred tax assets:
	Net operating, capital and other loss carryforwards	$	62,651		$	66,145

	Differences in basis of real estate	35,604			33,321

	Receivables	440			1,183

	Accruals and expenses	9,272			9,398

	Tax credit carryforwards	12,905			7,724

	Management contracts and other	393			629

	Total deferred tax assets	121,265			118,400

	Valuation allowance	(3,553		)	(4,531		)
	Net deferred income tax assets	$	30,353		$	44,828

Reconciliation of unrecognized tax benefits	'
	A reconciliation of the beginning and ending balance of our unrecognized tax benefits is presented below (in thousands):


		2013			2012				2011
	Balance at January 1	$	3,536		$	3,917			$	4,071

	Reductions as a result of a lapse of the applicable statutes	(764		)	(684		)		—

	Additions (reductions) based on tax positions related to prior years and current year excess benefits related to stock-based compensation	99			303				(154		)

	Balance at December 31	$	2,871		$	3,536			$	3,917

Components of the provision (benefit) for income taxes	'
	Significant components of the income tax benefit or expense are as follows and are classified within income tax benefit in continuing operations and income from discontinued operations, net in our statements of operations for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013			2012				2011
	Current:
	Federal	$	—		$	—			$	(109	)

	State	63			1,047				604

	Total current	63			1,047				495


	Deferred:
	Federal	7,621			7,116				(143		)

	State	1,685			812				(903		)

	Total deferred	9,306			7,928				(1,046		)

	Total expense (benefit)	$	9,369		$	8,975			$	(551	)

	Classification:
	Continuing operations	$	(1,959	)	$	(858	)		$	(5,941	)
	Discontinued operations	$	11,328		$	9,833			$	5,390

Reconciliation of income tax attributable to continuing and discontinued operations	'
	The reconciliation of income tax attributable to continuing and discontinued operations computed at the U.S. statutory rate to income tax expense (benefit) is shown below (dollars in thousands):


		2013						2012						2011
		Amount			Percent			Amount				Percent		Amount			Percent
	Tax at U.S. statutory rates on consolidated income or loss subject to tax	$	16,326		35	%		$	6,642			35	%	$	1,756		35	%

	State income tax expense (benefit), net of Federal tax (benefit) expense	1,748			3.7	%		1,859				9.8	%	(299		)	(6.0	)%

	Effect of permanent differences	(296		)	(0.6	)%		(256		)		(1.3	)%	(565		)	(11.3	)%
	Tax effect of intercompany transfers of assets between the REIT and taxable REIT subsidiaries (1)	(4,272		)	(9.2	)%		730				3.8	%	(1,965		)	(39.2	)%

	Tax credits	(4,137		)	(8.9	)%		—				—	%	—			—	%

	Increase in valuation allowance	—			—	%		—				—	%	522			10.4	%

		$	9,369		20	%		$	8,975			47.3	%	$	(551	)	(11.1	)%


	-1	Includes the effect of assets contributed by the Aimco Operating Partnership to TRS entities, for which deferred tax expense or benefit was recognized upon the sale or impairment of the asset by the TRS entity.
Dividends paid to holders of Common Stock	'
	For the years ended December 31, 2013, 2012 and 2011, dividends per share held for the entire year were estimated to be taxable as follows:


		2013						2012						2011
		Amount			Percentage			Amount				Percentage		Amount			Percentage
	Ordinary income	$	0.17		17.9	%		$	—			—	%	$	—		—	%

	Capital gains	0.13			13.9	%		0.35				46.6	%	0.12			24	%

	Unrecaptured Section 1250 gain	0.66			68.2	%		0.41				53.4	%	0.36			76	%

		$	0.96		100	%		$	0.76			100	%	$	0.48		100	%

Aimco_Equity_Tables

Aimco Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Classes of perpetual preferred stock	'
	At December 31, 2013 and 2012, Aimco had the following classes of perpetual preferred stock outstanding (dollars in thousands):


		Redemption		Annual Dividend Rate Per Share	Balance December 31,
		Date (1)		(paid quarterly)	2013		2012
	Class Z Cumulative Preferred Stock, 4,800,000 shares authorized and 1,274,243 shares issued/outstanding	7/29/16		7.00%	$	31,114	$	31,114

	Series A Community Reinvestment Act Preferred Stock, 240 shares authorized and 74 shares issued/outstanding	6/30/11		-2	37,000		37,000

	Preferred stock per consolidated balance sheets				$	68,114	$	68,114


	-1	All classes of preferred stock were or are redeemable at our option on and after the dates specified.

	-2	For the period from the date of original issuance through March 31, 2015, the dividend rate is a variable rate per annum equal to the Three-Month LIBOR Rate (as defined in the articles supplementary designating the Series A Community Reinvestment Act Perpetual Preferred Stock, or CRA Preferred Stock) plus 1.25%, calculated as of the beginning of each quarterly dividend period. The rate at December 31, 2013 and 2012 was 1.50% and 1.61%, respectively.
Issuance of preferred stock	'
	The following table summarizes our issuances of Class Z Preferred Stock during the years ended December 31, 2012 and 2011 (dollars in thousands, except per share amounts):


		Years Ended December 31,
		2012			2011
	Number of shares of preferred stock issued	405,090			869,153

	Price to public per share	$	24.78		$	24.25

	Underwriting discounts, commissions and transaction costs per share	$	0.54		$	1.25

	Net proceeds per share	$	24.24		$	23

	Net proceeds to Aimco	$	9,818		$	19,990

	Issuance costs (primarily underwriting commissions) recognized as an adjustment of additional paid-in capital	$	221		$	1,085

Partners_Capital_Tables

Partners Capital (Tables)	12 Months Ended
	Dec. 31, 2013
Partners' Capital [Abstract]	'
Schedule of Preferred Units	'
	As of December 31, 2013 and 2012, the following classes of Preferred OP Units (stated at their redemption values, in thousands, except unit and per unit data):


			Distributions per Annum					Units Issued and Outstanding				Balances
	Class of Preferred Units		Percent		Per Unit			2013			2012	2013		2012
	Class One		8.75	%	$	8		90,000			90,000	$	8,229	$	8,229

	Class Two		1.84	%	$	0.46		18,589			18,589	465		465

	Class Three		7.88	%	$	1.97		1,354,091			1,357,691	33,852		33,942

	Class Four		8	%	$	2		644,954			644,954	16,124		16,124

	Class Six		8.5	%	$	2.13		790,883			790,883	19,772		19,772

	Class Seven		7.87	%	$	1.97		27,960			27,960	699		699

	Total							2,926,477			2,930,077	$	79,141	$	79,231

Temporary Equity	'
	The redeemable Partnership Preferred Units presented in this reconciliation include the redeemable Preferred OP Units as well as the CRA Preferred Units held by Aimco, which were redeemed by Aimco during 2011.


		2013			2012			2011
	Balance at January 1	$	80,046		$	83,384		$	103,428

	Preferred distributions	(6,423		)	(6,496		)	(6,683		)
	Redemption of preferred units	(93		)	(3,338		)	(20,044		)
	Net income	6,423			6,496			6,683

	Balance at December 31	$	79,953		$	80,046		$	83,384

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of outstanding stock options	'
	The following table summarizes activity for our outstanding stock options for the years ended December 31, 2013, 2012 and 2011 (numbers of options in thousands):


		2013				2012				2011
		Number of Options		Weighted		Number of Options		Weighted		Number of Options		Weighted
				Average				Average				Average
				Exercise				Exercise				Exercise
				Price				Price				Price
	Outstanding at beginning of year	3,045		$	28.39	6,809		$	26.47	7,733		$	26.53

	Exercised	(44	)	22.52		(2,253	)	21.75		(203	)	8.99

	Forfeited	(10	)	27.82		(1,511	)	29.66		(721	)	32.09

	Outstanding at end of year	2,991		$	28.48	3,045		$	28.39	6,809		$	26.47

	Exercisable at end of year	2,991		$	28.48	2,841		$	29.79	6,146		$	27.5

Summary of restricted stock awards	'
	The following table summarizes activity for restricted stock awards for the years ended December 31, 2013, 2012 and 2011 (numbers of shares in thousands):


		2013				2012				2011
		Number of Shares		Weighted		Number of Shares		Weighted		Number of Shares		Weighted
				Average				Average				Average
				Grant-Date				Grant-Date				Grant-Date
				Fair Value				Fair Value				Fair Value
	Unvested at beginning of year	526		$	22.69	463		$	21.53	544		$	19.36

	Granted	253		27.86		241		24.31		290		25.59

	Vested	(204	)	21.81		(178	)	21.86		(243	)	24.31

	Forfeited	—		—		—		—		(128	)	16.16

	Unvested at end of year	575		$	25.28	526		$	22.69	463		$	21.53

Assets_Held_for_Sale_and_Disco1

Assets Held for Sale and Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Amounts classified as held for sale in consolidated balance sheets	'
	Amounts classified as held for sale in the accompanying consolidated balance sheets as of December 31, 2012, are as follows (in thousands):


		December 31,
		2012
	Real estate, net	$	279,653

	Other assets	10,093

	Assets held for sale	$	289,746


	Non-recourse property debt	$	278,538

	Other liabilities	2,900

	Liabilities related to assets held for sale	$	281,438

Summary of discontinued operations	'
	The following is a summary of the components of income from discontinued operations and the related amounts of income from discontinued operations attributable to Aimco, the Aimco Operating Partnership and noncontrolling interests for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		2013			2012			2011
	Rental and other property revenues	$	62,152		$	140,634		$	226,623

	Property operating expenses	(30,695		)	(62,781		)	(111,549		)
	Depreciation and amortization	(16,372		)	(41,577		)	(72,099		)
	Recovery of (provision for) real estate impairment losses	16			(17,452		)	(20,246		)

	Operating income	15,101			18,824			22,729

	Interest income	343			568			1,561

	Interest expense	(13,346		)	(29,972		)	(49,030		)
	Income (loss) before gain on dispositions of real estate and income tax	2,098			(10,580		)	(24,740		)

	Gain on dispositions of real estate	212,459			234,530			108,203

	Income tax expense	(11,328		)	(9,833		)	(5,390		)
	Income from discontinued operations, net	$	203,229		$	214,117		$	78,073

	Income from discontinued operations attributable to noncontrolling interests in consolidated real estate partnerships	(31,842		)	(41,633		)	(32,231		)
	Income from discontinued operations attributable to the Aimco Operating Partnership	$	171,387		$	172,484		45,842

	Income from discontinued operations attributable to noncontrolling interests in Aimco Operating Partnership	(9,248		)	(10,238		)	(3,147		)
	Income from discontinued operations attributable to Aimco	$	162,139		$	162,246		$	42,695

Earnings_Loss_per_ShareUnit_Ta

Earnings (Loss) per Share/Unit (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share	'
Earnings (Loss) per Share/Unit	'
	The following table illustrates Aimco’s calculation of basic and diluted earnings (loss) per share for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share data):


		2013			2012			2011
	Numerator:
	Income (loss) from continuing operations	$	34,596		$	(18,756	)	$	(136,237	)

	Loss (income) from continuing operations attributable to noncontrolling interests	10,555			(11,034		)	36,455

	Income attributable to preferred stockholders	(2,804		)	(49,888		)	(45,852		)
	Income attributable to participating securities	(813		)	(422		)	(222		)
	Income (loss) from continuing operations attributable to Aimco common stockholders	$	41,534		$	(80,100	)	$	(145,856	)

	Income from discontinued operations	$	203,229		$	214,117		$	78,073

	Income from discontinued operations attributable to noncontrolling interests	(41,090		)	(51,871		)	(35,378		)
	Income from discontinued operations attributable to Aimco common stockholders	$	162,139		$	162,246		$	42,695

	Net income (loss)	$	237,825		$	195,361		$	(58,164	)

	Net (income) loss attributable to noncontrolling interests	(30,535		)	(62,905		)	1,077

	Net income attributable to preferred stockholders	(2,804		)	(49,888		)	(45,852		)
	Net income attributable to participating securities	(813		)	(422		)	(222		)
	Net income (loss) attributable to Aimco common stockholders	$	203,673		$	82,146		$	(103,161	)

	Denominator:
	Weighted average common shares outstanding – basic	145,291			134,479			119,312

	Dilutive potential common shares	241			—			—

	Weighted average common shares outstanding – diluted	145,532			134,479			119,312

	Earnings (loss) per common share – basic and diluted:
	Income (loss) from continuing operations attributable to Aimco common stockholders	$	0.29		$	(0.60	)	$	(1.22	)

	Income from discontinued operations attributable to Aimco common stockholders	1.11			1.21			0.36

	Net income (loss) attributable to Aimco common stockholders	$	1.4		$	0.61		$	(0.86	)

	Dividends declared per common share	$	0.96		$	0.76		$	0.48

AIMCO PROPERTIES, L.P	'
Earnings Per Share	'
Earnings (Loss) per Share/Unit	'
	The following table illustrates the Aimco Operating Partnership’s calculation of basic and diluted earnings (loss) per unit for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per unit data):


		2013			2012			2011
	Numerator:
	Income (loss) from continuing operations	$	34,596		$	(18,756	)	$	(134,938	)

	Loss (income) from continuing operations attributable to noncontrolling interests	19,369			(9,585		)	32,488

	Income attributable to the Partnership’s preferred unitholders	(9,227		)	(56,384		)	(52,535		)
	Income attributable to participating securities	(813		)	(422		)	(222		)
	Income (loss) from continuing operations attributable to the Partnership’s common unitholders	$	43,925		$	(85,147	)	$	(155,207	)

	Income from discontinued operations	$	203,229		$	214,117		$	78,073

	Income from discontinued operations attributable to noncontrolling interests	(31,842		)	(41,633		)	(32,231		)
	Income from discontinued operations attributable to the Partnership’s common unitholders	$	171,387		$	172,484		$	45,842

	Net income (loss)	$	237,825		$	195,361		$	(56,865	)

	Net (income) loss attributable to noncontrolling interests	(12,473		)	(51,218		)	257

	Net income attributable to the Partnership’s preferred unitholders	(9,227		)	(56,384		)	(52,535		)
	Net income attributable to participating securities	(813		)	(422		)	(222		)
	Net income (loss) attributable to the Partnership’s common unitholders	$	215,312		$	87,337		$	(109,365	)

	Denominator:
	Weighted average common units outstanding – basic	153,256			142,614			127,681

	Dilutive potential common units	241			—			—

	Weighted average common units outstanding – diluted	153,497			142,614			127,681

	Earnings (loss) per common unit – basic and diluted:
	Income (loss) from continuing operations attributable to the Partnership’s common unitholders	$	0.29		$	(0.60	)	$	(1.22	)

	Income from discontinued operations attributable to the Partnership’s common unitholders	1.11			1.21			0.36

	Net income (loss) attributable to the Partnership’s common unitholders	$	1.4		$	0.61		$	(0.86	)

	Distributions declared per unit	$	0.96		$	0.76		$	0.63

Unaudited_Summarized_Consolida1

Unaudited Summarized Consolidated Quarterly Information (Tables)	12 Months Ended
	Dec. 31, 2013
Schedule of Unaudited Quarterly Financial Information [Line Items]	'
Summarized unaudited consolidated quarterly information	'
	Aimco’s summarized unaudited consolidated quarterly information for 2013 and 2012 is provided below (in thousands, except per share amounts).


			Quarter (1)
	2013		First			Second			Third			Fourth
	Total revenues		$	237,504		$	241,744		$	243,943		$	250,862

	Total operating expenses		(184,864		)	(183,033		)	(179,430		)	(177,707		)
	Operating income		52,640			58,711			64,513			73,155

	(Loss) income from continuing operations		(1,662		)	2,477			6,977			26,804

	Income from discontinued operations, net		4,495			4,502			72,433			121,799

	Net income		2,833			6,979			79,410			148,603

	Net income attributable to Aimco common stockholders		$	5,050		$	10,107		$	66,268		$	122,037

	Earnings (loss) per common share - basic and diluted:
	(Loss) income from continuing operations attributable to Aimco common stockholders		$	(0.01	)	$	0.01		$	0.04		$	0.25

	Net income attributable to Aimco common stockholders		$	0.03		$	0.07		$	0.46		$	0.84

	Weighted average common shares outstanding - basic		145,169			145,321			145,334			145,341

	Weighted average common shares outstanding - diluted		145,169			145,674			145,563			145,499



			Quarter (1)
	2012		First			Second			Third			Fourth
	Total revenues		$	231,748		$	236,085		$	242,973		$	247,705

	Total operating expenses		(199,743		)	(190,343		)	(197,071		)	(192,338		)
	Operating income		32,005			45,742			45,902			55,367

	(Loss) income from continuing operations		(26,294		)	(5,670		)	5,369			7,839

	Income from discontinued operations, net		36,941			39,801			47,966			89,409

	Net income		10,647			34,131			53,335			97,248

	Net (loss) income attributable to Aimco common stockholders		$	(10,609	)	$	523		$	24,163		$	67,928

	Loss per common share - basic and diluted:
	Loss from continuing operations attributable to Aimco common stockholders		$	(0.30	)	$	(0.25	)	$	(0.07	)	$	(0.01	)
	Net (loss) income attributable to Aimco common stockholders		$	(0.09	)	$	—		$	0.17		$	0.47

	Weighted average common shares outstanding - basic and diluted		120,526			127,395			144,959			145,035


AIMCO PROPERTIES, L.P	'
Schedule of Unaudited Quarterly Financial Information [Line Items]	'
Summarized unaudited consolidated quarterly information	'


			Quarter (1)
	2013		First			Second			Third			Fourth
	Total revenues		$	237,504		$	241,744		$	243,943		$	250,862

	Total operating expenses		(184,864		)	(183,033		)	(179,430		)	(177,707		)
	Operating income		52,640			58,711			64,513			73,155

	(Loss) income from continuing operations		(1,662		)	2,477			6,977			26,804

	Income from discontinued operations, net		4,495			4,502			72,433			121,799

	Net income		2,833			6,979			79,410			148,603

	Net income attributable to the Partnership’s common unitholders		$	5,347		$	10,682		$	70,064		$	129,008

	Earnings (loss) per common unit - basic and diluted:
	(Loss) income from continuing operations attributable to the Partnership’s common unitholders		$	(0.01	)	$	0.01		$	0.04		$	0.25

	Net income attributable to the Partnership’s common unitholders		$	0.03		$	0.07		$	0.46		$	0.84

	Weighted average common units outstanding - basic		153,169			153,294			153,287			153,276

	Weighted average common units outstanding - diluted		153,169			153,647			153,516			153,434



			Quarter (1)
	2012		First			Second			Third			Fourth
	Total revenues		$	231,748		$	236,085		$	242,973		$	247,705

	Total operating expenses		(199,743		)	(190,343		)	(197,071		)	(192,338		)
	Operating income		32,005			45,742			45,902			55,367

	(Loss) income from continuing operations		(26,294		)	(5,670		)	5,369			7,839

	Income from discontinued operations, net		36,941			39,801			47,966			89,409

	Net income		10,647			34,131			53,335			97,248

	Net (loss) income attributable to the Partnership’s common unitholders		$	(11,346	)	$	578		$	25,774		$	72,190

	Loss per common unit - basic and diluted:
	Loss from continuing operations attributable to the Partnership’s common unitholders		$	(0.30	)	$	(0.25	)	$	(0.07	)	$	(0.01	)
	Net (loss) income attributable to the Partnership’s common unitholders		$	(0.09	)	$	—		$	0.17		$	0.47

	Weighted average common units outstanding - basic and diluted		128,729			135,622			152,997			153,107


	-1	Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

Business_Segments_Tables

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2013
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 for the years ended December 31, 2013, 2012 and 2011 (in thousands):


		Conventional			Affordable			Proportionate			Corporate and				Consolidated
		Real Estate			Real Estate			Adjustments (1)			Amounts Not
		Operations			Operations						Allocated to
											Segments
	Year Ended December 31, 2013:
	Rental and other property revenues (2)	$	803,242		$	98,713		$	37,201		$	75			$	939,231

	Tax credit and asset management revenues	—			—			—			34,822				34,822

	Total revenues	803,242			98,713			37,201			34,897				974,053

	Property operating expenses (2)	285,062			39,717			13,406			37,487				375,672

	Investment management expenses	—			—			—			4,341				4,341

	Depreciation and amortization (2)	—			—			—			291,910				291,910

	General and administrative expenses	—			—			—			45,708				45,708

	Other expenses, net	—			—			—			7,403				7,403

	Total operating expenses	285,062			39,717			13,406			386,849				725,034

	Operating income (loss)	518,180			58,996			23,795			(351,952		)		249,019

	Other items included in continuing operations	—			—			—			(214,423		)		(214,423		)

	Income (loss) from continuing operations	$	518,180		$	58,996		$	23,795		$	(566,375	)		$	34,596



		Conventional			Affordable			Proportionate			Corporate and				Consolidated
		Real Estate			Real Estate			Adjustments (1)			Amounts Not
		Operations			Operations						Allocated to
											Segments
	Year Ended December 31, 2012:
	Rental and other property revenues (2)	$	761,876		$	97,135		$	57,251		$	480			$	916,742

	Tax credit and asset management revenues	—			—			—			41,769				41,769

	Total revenues	761,876			97,135			57,251			42,249				958,511

	Property operating expenses (2)	274,414			38,932			23,562			37,439				374,347

	Investment management expenses	—			—			—			12,008				12,008

	Depreciation and amortization (2)	—			—			—			325,173				325,173

	Provision for real estate impairment losses (2)	—			—			—			6,235				6,235

	General and administrative expenses	—			—			—			49,602				49,602

	Other expenses, net	—			—			—			12,130				12,130

	Total operating expenses	274,414			38,932			23,562			442,587				779,495

	Operating income (loss)	487,462			58,203			33,689			(400,338		)		179,016

	Other items included in continuing operations	—			—			—			(197,772		)		(197,772		)

Income (loss) from continuing operations	$	487,462		$	58,203		$	33,689		$	(598,110	)		$	(18,756	)



	Conventional			Affordable			Proportionate			Corporate and				Consolidated
	Real Estate			Real Estate			Adjustments (1)			Amounts Not
	Operations			Operations						Allocated to
										Segments
Year Ended December 31, 2011:
Rental and other property revenues (2)	$	724,866		$	94,007		$	55,627		$	1,194			$	875,694

Tax credit and asset management revenues	—			—			—			38,661				38,661

Total revenues	724,866			94,007			55,627			39,855				914,355

Property operating expenses (2)	263,969			37,096			22,140			52,959				376,164

Investment management expenses	—			—			—			10,459				10,459

Depreciation and amortization (2)	—			—			—			323,233				323,233

General and administrative expenses	—			—			—			50,906				50,906

Other expenses, net	—			—			—			18,302				18,302

Total operating expenses	263,969			37,096			22,140			455,859				779,064

Operating income (loss)	460,897			56,911			33,487			(416,004		)		135,291

Other items included in continuing operations (3)	—			—			—			(271,528		)		(271,528		)

Income (loss) from continuing operations	$	460,897		$	56,911		$	33,487		$	(687,532	)		$	(136,237	)


-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	Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

-3	In addition to the other items included in continuing operations presented in the table for the year ending December 31, 2011, the Aimco Operating Partnership recognized $1.3 million of interest income on its notes receivable from Aimco. These notes were repaid by Aimco during the three months ended December 31, 2011.
Assets of reportable segments	'
	The assets of our reportable segments on a proportionate basis, together with the proportionate adjustments to reconcile these amounts to the consolidated assets of our segments, and the consolidated assets not allocated to our segments are as follows (in thousands):


		2013			2012
	Conventional	$	4,793,472		$	4,837,236

	Affordable	382,091			466,678

	Proportionate adjustments (1)	428,376			634,858

	Corporate and other assets	475,474			462,608

	Total consolidated assets	$	6,079,413		$	6,401,380


	-1	Represents adjustments for the noncontrolling interests in consolidated real estate partnerships’ share of the assets of our consolidated apartment communities, which are excluded from our measurement of segment financial condition, and our share of the assets of our unconsolidated real estate partnerships, which are included in our measure of segment financial condition.

Organization_Details_Textual

Organization (Details Textual)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
			Conventional Real Estate Operations [Member]	Affordable Real Estate Operations [Member]	Consolidated Properties [Member]	Consolidated Properties [Member]	AIMCO PROPERTIES, L.P
			Units	Units	Conventional Real Estate Operations [Member]	Affordable Real Estate Operations [Member]
			Property	Property	Units	Property
					Property	Units
Organization	'	'	'	'	'	'	'
Shares of common stock outstanding	145,917,387	145,563,903	'	'	'	'	153,837,804
Aimco's ownership interest in AIMCO Properties, L.P.	94.90%	'	'	'	'	'	'
Number of apartment communities	'	'	162	74	158	58	'
Number of homes in apartment communities	'	'	50,486	10,067	50,344	8,953	'
Percentage of proportionate property net operating income generated by segment	'	'	90.00%	10.00%	'	'	'

Basis_of_Presentation_and_Summ3

Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Schedule of expected amortization of below market obligations related to acquired leases	'
2014	($2,270)
2015	-2,016
2016	-1,757
2017	-1,550
2018	($1,331)

Basis_of_Presentation_and_Summ4

Basis of Presentation and Summary of Significant Accounting Policies (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of other assets [Line Items]	'	'
Deferred financing costs, net	$36,641	$37,312
Investments in unconsolidated real estate partnerships	16,930	18,753
Investments in securitization trust that holds Aimco property debt	58,408	59,145
Intangible assets, net	50,025	50,322
Deferred tax asset, net (Note 8)	30,353	44,828
Assets related to the legacy asset management business (Note 3)	163,849	176,756
Prepaid expenses, accounts receivable, deposits and other	146,065	156,662
Other assets per consolidated balance sheets	$502,271	$543,778

Basis_of_Presentation_and_Summ5

Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Net real estate	$5,391,209,000	$5,234,961,000	'
Non-recourse property debt	4,337,785,000	4,413,083,000	'
Net below market lease amounts	16,900,000	19,800,000	'
Accumulated amortization of below market lease values	-35,900,000	-33,000,000	'
Amortization of below market lease values included in rental and other property revenues	-2,900,000	-3,800,000	-4,300,000
Interest costs capitalized	17,600,000	16,600,000	14,000,000
Other direct and indirect costs capitalized	33,200,000	33,700,000	29,000,000
Minimum [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Depreciable life of acquired buildings and improvements	'5 years	'	'
Average [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Depreciable life of acquired buildings and improvements	'15 years	'	'
Maximum [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Depreciable life of acquired buildings and improvements	'30 years	'	'
Building and Building Improvements [Member] \| Weighted Average [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Depreciable life of acquired buildings and improvements	'30 years	'	'
Leases, Acquired-in-Place, Market Adjustment [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Weighted average amortization period	'6 years 6 months 15 days	'	'
Variable Interest Entity, Primary Beneficiary [Member]	'	'	'
Basis of Presentation and Summary of Significant Accounting Policies	'	'	'
Number of variable interest entities	63	'	'
Number of apartment communities	49	'	'
Number of homes in apartment communities	7,656	'	'
Net real estate	392,245,000	578,421,000	'
Non-recourse property debt	$355,372,000	$477,791,000	'

Basis_of_Presentation_and_Summ6

Basis of Presentation and Summary of Significant Accounting Policies (Details Textual 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Basis of Presentation and Summary of Significant Accounting Policies	'	'		'
Provision for real estate impairment losses	$0	$6,235,000	[1]	$0
Goodwill associated with reportable segments	49,000,000	49,000,000		'
Goodwill written off related to apartment communities sold or classified as held for sale	5,500,000	7,500,000		5,100,000
Useful life of capitalized software costs	'5 years 0 months 0 days	'		'
Capitalized software purchase and development cost	3,300,000	5,800,000		12,600,000
Capitalized software net	22,000,000	27,500,000		'
Amortization of capitalized software	8,900,000	10,000,000		8,700,000
Noncontrolling interests in consolidated real estate partnerships	233,008,000	271,065,000		'
Noncontrolling interests in the Aimco Operating Partnership, weighted average ownership percentage by Noncontrolling Owners During Period	5.20%	5.70%		6.60%
Average term of operating leases with apartment residents	'12 months	'		'
Period of time over which low income housing tax credits realized by investors	'10 years	'		'
Typical compliance period related to low income housing tax credit arrangements	'15 years	'		'
General partner interests in low income housing tax credit partnerships held by Aimco	'one percent or less	'		'
Limited partner interests in low income housing tax credit partnerships held by unaffiliated investors	'at least 99%	'		'
Percentage of income tax on arms length transactions	100.00%	'		'
Legally Sold Portfolio, Not Derecognized for Accounting Purposes [Member]	'	'		'
Basis of Presentation and Summary of Significant Accounting Policies	'	'		'
Noncontrolling interests in consolidated real estate partnerships	35,818,000	57,208,000		'
Assets Held-for-sale [Member]	'	'		'
Basis of Presentation and Summary of Significant Accounting Policies	'	'		'
Goodwill associated with reportable segments	'	$5,500,000		'

[1]	Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

Significant_Transactions_Detai

Significant Transactions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of Asset Managed Portoflio Sale Amounts [Line Items]	'	'
Real estate, net	$120,175	$125,065
Cash and cash equivalents and restricted cash	29,046	31,558
Investment in unconsolidated real estate partnerships	10,817	15,987
Other assets	3,811	4,146
Total assets	163,849	176,756
Total indebtedness	106,032	107,562
Accrued and other liabilities	19,263	29,422
Total liabilities	125,295	136,984
Noncontrolling interests in consolidated real estate partnerships	233,008	271,065
Equity attributable to Aimco and the Aimco Operating Partnership	-27,721	-31,596
Total liabilities and equity	6,079,413	6,401,380
Legally Sold Portfolio, Not Derecognized for Accounting Purposes [Member]	'	'
Schedule of Asset Managed Portoflio Sale Amounts [Line Items]	'	'
Noncontrolling interests in consolidated real estate partnerships	35,818	57,208
Equity attributable to Aimco and the Aimco Operating Partnership	2,736	-17,436
Total liabilities and equity	$163,849	$176,756

Significant_Transactions_Detai1

Significant Transactions (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Statement of Income Related to Legally Sold Portfolio [Line Items]	'
Revenues	$23,711
Expenses	-21,188
Equity in earnings or loss of unconsolidated entities, gains or losses on dispositions and other, net	-748
Net income related to legacy asset management business	1,775
Income tax expense associated with legacy asset management business	-639
Noncontrolling interests in consolidated real estate partnerships	21,370
Net income of legacy asset management business attributable to Aimco and the Aimco Operating Partnership	$22,506

Significant_Transactions_Detai2

Significant Transactions (Details 2) (Series of Individually Immaterial Business Acquisitions [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
	Property	Property
Series of Individually Immaterial Business Acquisitions [Member]	'	'
Business Acquisition [Line Items]	'	'
Number of apartment homes	134	614
Acquisition price	$53,575	$126,873
Non-recourse property debt assumed (outstanding principal balance)	12,446	38,819
Non-recourse property debt assumed (fair value)	14,767	43,938
Total fair value allocated to real estate	$55,896	$130,547

Significant_Transactions_Detai3

Significant Transactions (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Property	Property	PartnershipUnit
	PartnershipUnit	PartnershipUnit	Property
Business Acquisition [Line Items]	'	'	'
Consolidated partnerships in which remaining limited partnership interests were acquired	3	11	12
Number of apartment communities owned by partnerships	5	17	15
Cost of limited partnership interests acquired	$17,900	'	'
Partners Capital Account Effect Of Changes In Ownership For Consolidated	17,170	50,654	22,305
Excess of consideration paid over the carrying amount of noncontrolling interests acquired	'	$44,777	$36,260

Significant_Transactions_Detai4

Significant Transactions (Details Textual) (USD $)	12 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2006
				West Harlem Property Loans [Member]	West Harlem Property Loans [Member]	First Mortgage [Member]	Second Mortgage [Member]
					Units	West Harlem Property Loans [Member]	West Harlem Property Loans [Member]
					Property
Noncontrolling Interest [Line Items]	'	'	'	'	'	'	'
Number of communities collateralizing notes receivable	'	'	'	'	84	'	'
Payments to Acquire Notes Receivable	$119,101,000	$0	$0	'	'	$119,100,000	'
Number Of Apartment Homes In Communities Collateralizing Notes Receivable	'	'	'	'	1,596	'	'
Number Of Commercial Spaces In Communities Collateralizing Notes Receivable	'	'	'	'	43	'	'
Aggregate Carrying Amount Of Second Mortgage Loans And Purchase Option	'	'	'	'	110,500,000	'	'
Mortgage Loans on Real Estate, Face Amount of Mortgages	'	'	'	'	'	'	100,100,000
Proceeds from repayment of first and second mortgage loans and unexercised option	'	'	'	$229,800,000	'	'	'

Significant_Transactions_Detai5

Significant Transactions (Details Textual 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Property	Dec. 31, 2012	Dec. 31, 2011
Schedule of Asset Managed Portoflio Sale Amounts [Line Items]	'	'	'
Gain on dispositions of unconsolidated real estate and other, net	$1,797,000	$21,886,000	$2,403,000
Number of partnerships in legally sold portfolio	17	'	'
Number of consolidated communities in legally sold portfolio	14	'	'
Number of unconsolidated communities in legally sold portfolio	61	'	'
Noncontrolling Interest in Limited Partnerships share of net income for dercognition	20,600,000	'	'
Parent Company [Member]	'	'	'
Schedule of Asset Managed Portoflio Sale Amounts [Line Items]	'	'	'
Gain on dispositions of unconsolidated real estate and other, net	'	$15,700,000	'

Significant_Transactions_Detai6

Significant Transactions (Details Textual 2) (USD $)	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2011
In Millions, unless otherwise specified	Newly Acquired Redevelopment Property [Member]	Newly Acquired Redevelopment Property [Member]	Newly Acquired Conventional Properties [Member]
		Units	Units
			Property
Business Acquisition [Line Items]	'	'	'
Number of homes in apartment communities	'	126	'
Minimum Expected Investment In Redevelopment Property	$101	'	'
Percentage Of Non Controlling Interests Acquired	'	'	50.00%
Number Of Real Estate Contiguous Communities	'	'	4
Number Of Homes In Real Estate Contiguous Properties	'	'	142

Investments_in_Unconsolidated_2

Investments in Unconsolidated Real Estate Partnerships (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financial information for the unconsolidated real estate partnerships	'	'	'
Real estate, net of accumulated depreciation	$88,014	$107,419	$429,780
Total assets	93,242	114,658	472,904
Non-recourse property debt and other notes payable	60,660	122,019	321,236
Total liabilities	64,859	132,767	455,591
Partnersâ€™ capital (deficit)	28,383	-18,109	17,313
Rental and other property revenues	16,268	72,636	114,974
Property operating expenses	-8,470	-49,331	-75,934
Depreciation and amortization	-3,300	-18,388	-26,323
Interest expense	-4,185	-21,354	-27,108
Gain on sale and impairment losses, net	-36,212	4,140	-22,598
Net income (loss)	$35,909	($21,108)	$6,773

Investments_in_Unconsolidated_3

Investments in Unconsolidated Real Estate Partnerships (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified	Property	Property	Property
Schedule of Equity Method Investments [Line Items]	'	'	'
Aggregate investment in unconsolidated partnerships	16.9	18.7	'
Excess of equity method investment aggregate cost over share of underlying historical partners deficit	1.1	6.9	'
Maximum [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Range of ownership interests in unconsolidated real estate partnerships	67.00%	'	'
Minimum [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Range of ownership interests in unconsolidated real estate partnerships	5.00%	'	'
Unconsolidated Properties [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Number of apartment communities	20	22	123

NonRecourse_Property_Debt_and_2

Non-Recourse Property Debt and Credit Agreement (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Non-recourse property debt	$4,337,785	$4,413,083
Property Notes Payable	'	'
Debt Instrument [Line Items]	'	'
Non-recourse property debt	4,120,240	4,195,264
Fixed Rate \| Property Notes Payable	'	'
Debt Instrument [Line Items]	'	'
Weighted Average Interest Rate	5.46%	'
Non-recourse property debt	4,107,141	4,181,821
Variable Rate \| Property Notes Payable	'	'
Debt Instrument [Line Items]	'	'
Weighted Average Interest Rate	2.92%	'
Non-recourse property debt	$13,099	$13,443

NonRecourse_Property_Debt_and_3

Non-Recourse Property Debt and Credit Agreement (Details 1) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Summarizes property tax-exempt bond financings related to properties classified as held for use	'	'
Non-recourse property debt	$4,337,785	$4,413,083
Property Tax Exempt Bonds Payable	'	'
Summarizes property tax-exempt bond financings related to properties classified as held for use	'	'
Non-recourse property debt	217,545	217,819
Property Tax Exempt Bonds Payable \| Fixed Rate	'	'
Summarizes property tax-exempt bond financings related to properties classified as held for use	'	'
Weighted Average Interest Rate	4.87%	'
Non-recourse property debt	85,634	87,220
Property Tax Exempt Bonds Payable \| Variable Rate	'	'
Summarizes property tax-exempt bond financings related to properties classified as held for use	'	'
Weighted Average Interest Rate	1.09%	'
Non-recourse property debt	$131,911	$130,599

NonRecourse_Property_Debt_and_4

Non-Recourse Property Debt and Credit Agreement (Details 2) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Scheduled principal amortization and maturity payments	'	'
Amortization, 2014	$88,010	'
Amortization, 2015	88,424	'
Amortization, 2016	85,380	'
Amortization, 2017	79,223	'
Amortization, 2018	74,232	'
Maturities, 2014	82,192	'
Maturities, 2015	183,317	'
Maturities, 2016	465,321	'
Maturities, 2017	398,320	'
Maturities, 2018	238,253	'
Total Amortization and Maturities, 2014	170,202	'
Total Amortization and Maturities, 2015	271,741	'
Total Amortization and Maturities, 2016	550,701	'
Total Amortization and Maturities, 2017	477,543	'
Total Amortization and Maturities, 2018	312,485	'
Total Amortization and Maturities, Thereafter	2,555,113	'
Principal outstanding	$4,337,785	$4,413,083

NonRecourse_Property_Debt_and_5

Non-Recourse Property Debt and Credit Agreement (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Estimated Fair Value Of Unencumbered Real Estate	$380,000,000	'
Credit Agreement	'	'
Revolving loan commitments	600,000,000	'
Initial interest rate for credit facility	'LIBOR, plus 1.875%, or, at our option, Prime plus 0.5%	'
Credit facility maturity date	1-Sep-17	'
Credit Facility Extension option	'an additional one-year period	'
Revolving credit facility borrowings	50,400,000	0
Remaining borrowing capacity under credit facility	505,000,000	'
Amount outstanding for undrawn letters of credit issued under revolving credit facility	44,600,000	'
Line of Credit Facility, Interest Rate at Period End	3.75%	'
Property Notes Payable	'	'
Debt Instrument [Line Items]	'	'
Debt Instrument, Collateral Amount	7,251,100,000	'
Property tax-exempt bonds payable	'	'
Debt Instrument [Line Items]	'	'
Debt Instrument, Collateral Amount	$514,200,000	'
Fixed Rate \| Property Notes Payable	'	'
Non-Recourse Property Debt (Textual) [Abstract]	'	'
Debt Instrument, Maximum Maturity Date	31-Jan-55	'
Fixed Rate \| Property tax-exempt bonds payable	'	'
Non-Recourse Property Debt (Textual) [Abstract]	'	'
Debt Instrument, Maximum Maturity Date	28-Feb-61	'
Variable Rate \| Property Notes Payable	'	'
Non-Recourse Property Debt (Textual) [Abstract]	'	'
Debt Instrument, Maximum Maturity Date	31-Jan-16	'
Variable Rate \| Property tax-exempt bonds payable	'	'
Non-Recourse Property Debt (Textual) [Abstract]	'	'
Debt Instrument, Maximum Maturity Date	31-Jul-33	'
Unencumbered Real Estate Property [Member]	'	'
Debt Instrument [Line Items]	'	'
Number of apartment communities	7	'
Pledged as collateral [Member] \| Property Notes Payable	'	'
Debt Instrument [Line Items]	'	'
Number of apartment communities	186	'
Pledged as collateral [Member] \| Property tax-exempt bonds payable	'	'
Debt Instrument [Line Items]	'	'
Number of apartment communities	20	'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Roll Forward]	'	'	'
Fair Value, Beginning Balance	$51,177	$44,681	'
Investment accretion	3,451	3,111	'
Unrealized losses included in interest expense	-48	-48	'
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,678	1,673	1,667
Unrealized gains (losses) included in equity and partnersâ€™ capital	-2,454	1,760	'
Fair Value, Ending Balance	53,804	51,177	44,681
Fair Value, Inputs, Level 2 [Member] \| Available for sale [Member]	'	'	'
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Roll Forward]	'	'	'
Fair Value, Beginning Balance	59,145	51,693	'
Investment accretion	3,451	3,111	'
Unrealized losses included in interest expense	'	'	'
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	'	'	'
Unrealized gains (losses) included in equity and partnersâ€™ capital	-4,188	4,341	'
Fair Value, Ending Balance	58,408	59,145	'
Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member]	'	'	'
Fair Value of Assets and Liabilities Measured on a Recurring Basis [Roll Forward]	'	'	'
Fair Value, Beginning Balance	-7,968	-7,012	'
Investment accretion	'	'	'
Unrealized losses included in interest expense	-48	-48	'
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss	1,678	1,673	'
Unrealized gains (losses) included in equity and partnersâ€™ capital	1,734	-2,581	'
Fair Value, Ending Balance	($4,604)	($7,968)	'

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details Textual) (USD $)	12 Months Ended					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
	Property	Property	Dec. 31, 2013	Cash Flow Hedging [Member]	Cash Flow Hedging [Member]	Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Available-for-sale Securities, Face Value	'	'	$100,900,000	'	'	'
Excepted remaining term of available-for-sale debt securities	'	'	'7 years 5 months	'	'	'
Amortized cost of the investment in securities	56,300,000	'	59,800,000	'	'	'
Interest Rate Swap Notional Amount	'	'	'	50,700,000	51,000,000	'
Weighted Average Remaining Term of interest Rate Swaps	'	'	'	'	'	'7 years 0 months
Period for reclassification of earnings	'	'	'12 months	'	'	'
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	'	'	'	'	'	-1,700,000
Weighted average fixed receive rate under total rate of return swaps	'	'	'	'	'	3.43%
Number of properties impaired	9	19	'	'	'	'
Carrying amount of real estate (held for use or held for sale) prior to recognition of impairment losses	81,800,000	108,200,000	'	'	'	'
Fair value measurement, impairment losses on real estate	65,800,000	92,300,000	'	'	'	'
Impairment losses on real estate	16,000,000	15,900,000	'	'	'	'
Unlevered FCF rate of return	7.39%	7.87%	'	'	'	'
Estimated fair value of consolidated debt	5,100,000,000	'	4,500,000,000	'	'	'
Carrying amount of consolidated debt (including amounts reported in liabilities related to assets for sale)	$4,700,000,000	'	$4,400,000,000	'	'	'

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Approximate minimum annual rentals under operating lease obligations	'
Operating Lease Obligations, 2014	$3,249
Operating Lease Obligations, 2015	2,442
Operating Lease Obligations, 2016	2,249
Operating Lease Obligations, 2017	1,985
Operating Lease Obligations, 2018	841
Operating Lease Obligations, Total	$10,766

Commitments_and_Contingencies_2

Commitments and Contingencies (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Abstract]	'	'	'
Commitments related to capital spending activities	$147	'	'
Long-term Purchase Commitment, Time Period	'12 months	'	'
Term of commitments to purchase goods or services related to the operations of properties	'one year or less	'	'
Range of remaining compliance periods for tax credit syndication arrangements	'less than one year to 12 years	'	'
Rent expense	4.2	4.6	5.4
One Canal Project [Member]	'	'	'
Commitments and Contingencies [Abstract]	'	'	'
Number of stories in real estate development project	12	'	'
Expected Investment in Development Project	190	'	'
Expected Development Period	'two and one-half years	'	'
Number of homes in apartment communities	310	'	'
Net Rentable Area	22,000	'	'
Term of ground lease	'99 years 0 months	'	'
Prepaid Rent	13	'	'
Redevelopment and capital improvement activities [Member]	'	'	'
Commitments and Contingencies [Abstract]	'	'	'
Commitments related to capital spending activities	$82.60	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax liabilities:	'	'	'
Partnership differences	$50,290	$29,745	'
Deferred revenue	25,596	23,139	'
Capitalized interest	11,424	16,157	'
Other	49	0	'
Total deferred tax liabilities	87,359	69,041	'
Deferred tax assets:	'	'	'
Net operating, capital and other loss carryforwards	62,651	66,145	'
Differences in basis of real estate	35,604	33,321	'
Receivables	440	1,183	'
Accruals and expenses	9,272	9,398	'
Tax credit carryforwards	12,905	7,724	'
Management contracts and other	393	629	'
Total deferred tax assets	121,265	118,400	'
Valuation allowance	-3,553	-4,531	'
Net deferred income tax assets	30,353	44,828	'
Reconciliation of unrecognized tax benefits	'	'	'
Balance at January 1	3,536	3,917	4,071
Reductions as a result of a lapse of the applicable statutes	-764	-684	0
Additions (reductions) based on tax positions related to prior years and current year excess benefits related to stock-based compensation	99	303	'
Additions (reductions) based on tax positions related to prior years and current year excess benefits related to stock-based compensation	'	'	-154
Balance at December 31	$2,871	$3,536	$3,917

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Federal	$0	$0	($109)
State	63	1,047	604
Total current	63	1,047	495
Deferred:	'	'	'
Federal	7,621	7,116	-143
State	1,685	812	-903
Total deferred	9,306	7,928	-1,046
Total expense (benefit)	9,369	8,975	-551
Classification:	'	'	'
Continuing operations	1,959	858	5,941
Discontinued operations	$11,328	$9,833	$5,390

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Reconciliation of income tax attributable to continuing and discontinued operations	'		'		'
Tax at U.S. statutory rates on consolidated income or loss subject to tax	$16,326		$6,642		$1,756
Tax at U.S. statutory rates on consolidated income or loss subject to tax, percentage	35.00%		35.00%		35.00%
State income tax expense (benefit), net of Federal tax (benefit) expense	1,748		1,859		-299
State income tax expense (benefit), net of Federal tax (benefit), percentage	3.70%		9.80%		-6.00%
Effect of permanent differences	296		256		565
Effect of permanent differences, percentage	-0.60%		-1.30%		-11.30%
Tax effect of intercompany transfers of assets between the REIT and taxable REIT subsidiaries (1)	-4,272	[1]	730	[1]	-1,965	[1]
Tax effect of intercompany transfers of assets between the REIT and taxable REIT subsidiaries, percentage (1)	-9.20%	[1]	3.80%	[1]	-39.20%	[1]
Tax credits	-4,137		0		0
Tax credits, percentage	-8.90%		0.00%		0.00%
Increase in valuation allowance	0		0		522
Increase in valuation allowance, percentage	0.00%		0.00%		10.40%
Total expense (benefit)	$9,369		$8,975		($551)
Reconciliation of income tax, percentage	20.00%		47.30%		-11.10%

[1]	Includes the effect of assets contributed by the Aimco Operating Partnership to TRS entities, for which deferred tax expense or benefit was recognized upon the sale or impairment of the asset by the TRS entity.

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	12 Months Ended
Income Taxes (Details 3) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Dividends paid to holders of common stock	'	'	'
Ordinary income	$0.17	$0	$0
Ordinary income, percentage	17.90%	0.00%	0.00%
Capital gains	$0.13	$0.35	$0.12
Capital gains, percentage	13.90%	46.60%	24.00%
Unrecaptured Section 1250 gain	$0.66	$0.41	$0.36
Unrecaptured Section 1250 gain, percentage	68.20%	53.40%	76.00%
Dividends declared per common share/unit	$0.96	$0.76	$0.48
Dividends declared per common share, percentage	100.00%	100.00%	100.00%

Income_Taxes_Details_Textual

Income Taxes (Details Textual) (USD $)	12 Months Ended
Income Taxes (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]	'	'	'
Valuation Allowance, Deferred Tax Asset, Change in Amount	$1,000,000	'	'
Income Taxes (Textual) [Abstract]	'	'	'
Portion of unrecognized tax benefit that, if recognized, would impact the effective tax rate	2,200,000	'	'
Excess tax benefits recognized related to employee stock option exercises and vested restricted stock awards	600,000	500,000	'
Consolidated income (loss) subject to tax	46,600,000	19,000,000	5,000,000
Cash paid for income taxes	600,000	1,100,000	1,200,000
Operating loss carryforwards	150,800,000	'	'
Net operating losses generated during period	15,800,000	'	'
Net deferred tax asset related to tax credit carryforwards	13,400,000	'	'
Net deferred tax asset related to credits	$12,900,000	'	'
Minimum [Member]	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'
Expiration years of net operating loss carryforwards	1-Jan-27	'	'
Tax Credit Carryforward, Expiration Date	1-Jan-17	'	'
Maximum [Member]	'	'	'
Operating Loss Carryforwards [Line Items]	'	'	'
Expiration years of net operating loss carryforwards	1-Jan-32	'	'
Tax Credit Carryforward, Expiration Date	1-Jan-32	'	'

Aimco_Equity_Details

Aimco Equity (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Classes of perpetual preferred stock	'		'
Preferred stock amounts	$68,114		$68,114
Preferred Stock [Member]	'		'
Classes of perpetual preferred stock	'		'
Annual per share dividend rate	'		7.86%
Class Z Cumulative Preferred Stock [Member]	'		'
Classes of perpetual preferred stock	'		'
Redemption Date	29-Jul-16	[1]	'
Annual per share dividend rate	7.00%		'
Preferred stock amounts	31,114		31,114
Shares of preferred stock authorized	4,800,000		4,800,000
Shares of preferred stock issued	1,274,243		1,274,243
Shares of preferred stock outstanding	1,274,243		1,274,243
Series A Community Reinvestment Act Preferred Stock [Member]	'		'
Classes of perpetual preferred stock	'		'
Redemption Date	30-Jun-11	[1]	'
Annual per share dividend rate	1.50%		1.61%
Preferred stock amounts	$37,000		$37,000
Shares of preferred stock authorized	240		240
Shares of preferred stock issued	74		74
Shares of preferred stock outstanding	74		74
Dividend rate	1.25%		'

[1]	All classes of preferred stock were or are redeemable at our option on and after the dates specified.

Aimco_Equity_Details_1

Aimco Equity (Details 1) (Class Z Cumulative Preferred Stock [Member], USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Class Z Cumulative Preferred Stock [Member]	'	'
Issuances of Preferred Stock [Abstract]	'	'
Number of shares of stock issued	405,090	869,153
Price to public per share	$24.78	$24.25
Underwriting discounts, commissions and transaction costs per share	$0.54	$1.25
Net proceeds per share	$24.24	$23
Net proceeds to Aimco	$9,818	$19,990
Issuance costs (primarily underwriting commissions) recognized as an adjustment of additional paid-in capital	$221	$1,085

Aimco_Equity_Details_Textual

Aimco Equity (Details Textual) (USD $)	12 Months Ended
Aimco Equity (Details Textual) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Class of Stock [Line Items]	'	'	'
Per share par value of preferred stock issued	$0.01	'	'
Net proceeds from stock issued during period	'	$9,818,000	$19,990,000
Proceeds to Aimco from stock options exercised	993,000	48,907,000	'
Class Z Cumulative Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Dividend rate of preferred stock issued	7.00%	'	'
Preferred stock, liquidation preference per share	$25	'	'
Number of shares of stock issued	'	405,090	869,153
Net proceeds per share of stock issued	'	$24.24	$23
Shares available for issuance under at-the-market offering programs	3,500,000	'	'
Series A Community Reinvestment Act Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Preferred stock dividend description	'variable rate per annum equal to the Three-Month LIBOR Rate (as defined in the articles supplementary designating the SeriesÂ A Community Reinvestment Act Perpetual Preferred Stock, or CRA Preferred Stock) plus 1.25%, calculated as of the beginning of each quarterly dividend period	'	'
Dividend rate of preferred stock issued	1.50%	1.61%	'
Preferred stock, liquidation preference per share	$500,000	'	'
Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Dividend rate of preferred stock issued	'	7.86%	'
Shares of preferred stock redeemed during period	'	24,000,000	'
Preferred stock redeemed during period at redemption value	'	600,900,000	'
Previously deferred issuance costs reflected as an adjustment of net income attributable to preferred security holders	'	20,700,000	'
Class V Cumulative Preferred Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Dividend rate of preferred stock issued	'	'	8.00%
Shares of preferred stock redeemed during period	'	'	900,000
Preferred stock redeemed during period at redemption value	'	'	21,600,000
Previously deferred issuance costs reflected as an adjustment of net income attributable to preferred security holders	'	'	800,000
Class A Common Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Number of public stock offerings completed during period	'	2	'
Number of shares of stock issued	'	22,144,200	2,914,000
Net proceeds from stock issued during period	'	594,400,000	71,900,000
Net proceeds per share of stock issued	'	$26.84	'
Number of public stock offerings completed during period to which exercise of stock options related	'	1	'
Near-term expiring stock options exercised	'	2,041,934	'
Weighted average exercise price of stock options exercised by holders of near-term expiring stock options	'	$23.01	'
Shares available for issuance under at-the-market offering programs	3,500,000	'	'
Options Exercised With Public Offering [Member] \| Class A Common Stock [Member]	'	'	'
Class of Stock [Line Items]	'	'	'
Proceeds to Aimco from stock options exercised	'	$47,000,000	'

Partners_Capital_Details

Partners Capital (Details) (AIMCO PROPERTIES, L.P, USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Limited Partners' Capital Account [Line Items]	'	'
Perpetual Partnership Preferred Units issued	2,926,477	2,930,077
Perpetual Partnership Preferred Units outstanding	2,930,077	2,930,077
Perpetual Partnership Preferred Units, Redemption Value	$79,141	$79,231
Class One [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	8.75%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$8	'
Perpetual Partnership Preferred Units issued	90,000	90,000
Perpetual Partnership Preferred Units outstanding	90,000	90,000
Perpetual Partnership Preferred Units, Redemption Value	8,229	8,229
Class Two [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	1.84%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$0.46	'
Perpetual Partnership Preferred Units issued	18,589	18,589
Perpetual Partnership Preferred Units outstanding	18,589	18,589
Perpetual Partnership Preferred Units, Redemption Value	465	465
Class Three [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	7.88%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$1.97	'
Perpetual Partnership Preferred Units issued	1,354,091	1,357,691
Perpetual Partnership Preferred Units outstanding	1,354,091	1,357,691
Perpetual Partnership Preferred Units, Redemption Value	33,852	33,942
Class Four [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	8.00%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$2	'
Perpetual Partnership Preferred Units issued	644,954	644,954
Perpetual Partnership Preferred Units outstanding	644,954	644,954
Perpetual Partnership Preferred Units, Redemption Value	16,124	16,124
Class Six [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	8.50%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$2.13	'
Perpetual Partnership Preferred Units issued	790,883	790,883
Perpetual Partnership Preferred Units outstanding	790,883	790,883
Perpetual Partnership Preferred Units, Redemption Value	19,772	19,772
Class Seven [Member]	'	'
Limited Partners' Capital Account [Line Items]	'	'
Per Annum Distribution Rate	7.87%	'
Distribution Made to Limited Partner, Distributions Paid, Per Unit	$1.97	'
Perpetual Partnership Preferred Units issued	27,960	27,960
Perpetual Partnership Preferred Units outstanding	27,960	27,960
Perpetual Partnership Preferred Units, Redemption Value	$699	$699

Partners_Capital_Details_1

Partners Capital (Details 1) (AIMCO PROPERTIES, L.P, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
AIMCO PROPERTIES, L.P	'	'	'
Increase (Decrease) in Temporary Equity [Roll Forward]	'	'	'
Balance at January 1	$80,046	$83,384	$103,428
Preferred distributions	-6,423	-6,496	-6,683
Redemption of preferred units	-93	-3,338	-20,044
Net income attributable to preferred noncontrolling interests in Aimco Operating Partnership	6,423	6,496	6,683
Balance at December 31	$79,953	$80,046	$83,384

Partners_Capital_Details_Textu

Partners Capital (Details Textual) (USD $)	12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
				AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	Aimco [Member]	Aimco [Member]	Special Distribution to Common Partnership Units [Member]	High Performance Units [Member]	High Performance Units [Member]
							AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P	AIMCO PROPERTIES, L.P
Related Party Transaction [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Redeemable Partnership Preferred Units redeemed for cash during period	'	'	'	3,600	131,400	1,600	'	'	'	'	'
Operating Partnership Units Issued To Acquire Noncontrolling Limited Partnership Interests In Consolidated Partnerships	'	'	'	21,500	184,000	6,900	'	'	'	'	'
Common OP Units redeemed in exchange for cash during period	'	'	'	105,000	416,000	237,000	'	'	'	'	'
HPUs outstanding	'	'	'	'	'	'	'	'	'	2,339,950	2,339,950
Note receivable from Aimco, stated interest rate percentage	'	'	'	'	'	'	'	5.70%	'	'	'
Face value of notes receivable from Aimco	'	'	'	'	'	'	'	$10,100,000	'	'	'
Repayment of notes receivable from Aimco	'	'	'	'	'	'	18,500,000	'	'	'	'
Special distribution on common partnership units	$140,052,000	$104,006,000	$57,583,000	'	'	'	'	'	$19,700,000	'	'
Special distribution on common partnership units, per share	$0.96	$0.76	$0.48	$0.96	$0.76	$0.63	'	'	$0.15	'	'

ShareBased_Compensation_Detail

Share-Based Compensation (Details) (Stock Options [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]	'	'	'
Summary of outstanding stock options	'	'	'
Number of options outstanding, beginning balance	3,045,000	6,809,000	7,733,000
Weighted average exercise price, beginning balance	$28.39	$26.47	$26.53
Number of options, exercised	-44,000	-2,253,000	-203,000
Weighted average exercise price options, exercised	$22.52	$21.75	$8.99
Number of options, forfeited	-10,000	-1,511,000	-721,000
Weighted average exercise price options, forfeited	$27.82	$29.66	$32.09
Number of options outstanding, ending balance	2,991,000	3,045,000	6,809,000
Weighted average exercise price, ending balance	$28.48	$28.39	$26.47
Number of options exercisable at end of year	2,991,000	2,841,000	6,146,000
Weighted average exercise price, exercisable	$28.48	$29.79	$27.50

ShareBased_Compensation_Detail1

Share-Based Compensation (Details 1) (Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock [Member]	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Numer of shares, Unvested at beginning of year	526	463	544
Weighted Average Grant-Date Fair Value, Unvested at beginning of year	$22.69	$21.53	$19.36
Numer of shares, Granted	253	241	290
Weighted Average Grant-Date Fair Value, Granted	$27.86	$24.31	$25.59
Numer of shares, Vested	-204	-178	-243
Weighted Average Grant-Date Fair Value, Vested	$21.81	$21.86	$24.31
Numer of shares, Forfeited	0	0	-128
Forfeited, weighted average grant date fair value	$0	$0	$16.16
Numer of shares, Unvested at end of year	575	526	463
Weighted Average Grant-Date Fair Value, Unvested at end of year	$25.28	$22.69	$21.53

ShareBased_Compensation_Detail2

Share-Based Compensation (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-Based Compensation and Employee Benefit Plans (Textual) [Abstract]	'	'	'
Maximum number of shares reserved for issuance under stock plan	4.4	'	'
Shares available to be granted under plan	1	'	'
Term of stock options	'10 years	'	'
Options outstanding, aggregate intrinsic value	$3.60	'	'
Options outstanding, Weighted average remaining contractual term	'3 years 0 months 0 days	'	'
Options exercisable, aggregate intrinsic value	3.6	'	'
Options exercisable, Weighted average remaining contractual term	'3 years 0 months 0 days	'	'
Intrinsic value of stock options exercised	0.3	10.9	3
Total Compensation cost recognized for stock options and restricted stock awards	5.9	5.3	5.9
Total compensation cost capitalized for options and restricted stock awards	0.3	0.4	0.5
Total unvested compensation cost not yet recognized for options and restricted stock awards	8.6	'	'
Weighted average period over which unvested compensation cost expected to be recognized	'1 year 8 months	'	'
Stock Options [Member]	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Options vest period	'4 years	'	'
Restricted Stock [Member]	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Options vest period	'4 years	'	'
Aggregate fair value of shares that vested	$5.70	$4.40	$6.10

Assets_Held_for_Sale_and_Disco2

Assets Held for Sale and Discontinued Operations (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amounts classified as held for sale in consolidated balance sheets	'	'
Real estate, net	'	$279,653
Other assets	'	10,093
Assets held for sale	0	289,746
Non-recourse property debt	'	278,538
Other liabilities	'	2,900
Liabilities related to assets held for sale	$0	$281,438

Assets_Held_for_Sale_and_Disco3

Assets Held for Sale and Discontinued Operations (Details 1) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Components of income from discontinued operations including portions attributable to Aimco and noncontrolling interests

Rental and other property revenues

$62,152

$140,634

$226,623

Property operating expenses

-30,695

-62,781

-111,549

Depreciation and amortization

-16,372

-41,577

-72,099

Recovery of (provision for) real estate impairment losses

-17,452

-20,246

Operating income

15,101

18,824

22,729

Interest income

343

568

1,561

Interest expense

-13,346

-29,972

-49,030

Income (loss) before gain on dispositions of real estate and income tax

2,098

-10,580

-24,740

Gain on dispositions of real estate

212,459

234,530

108,203

Income tax expense

-11,328

-9,833

-5,390

Income from discontinued operations, net

121,799

[1]

72,433

[1]

4,502

[1]

4,495

[1]

89,409

[1]

47,966

[1]

39,801

[1]

36,941

[1]

203,229

214,117

78,073

Income from discontinued operations attributable to noncontrolling interests in consolidated real estate partnerships

-31,842

-41,633

-32,231

Income from discontinued operations attributable to the Aimco Operating Partnership

171,387

172,484

45,842

Income from discontinued operations attributable to noncontrolling interests in Aimco Operating Partnership

-9,248

-10,238

-3,147

Income from discontinued operations attributable to Aimco

$162,139

$162,246

$42,695

[1]

Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

Assets_Held_for_Sale_and_Disco4

Assets Held for Sale and Discontinued Operations (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Units	Units	Units
	Property	Property	Property
Discontinued Operations And Assets Held For Sale (Textual) [Abstract]	'	'	'
Number of apartment communities to be sold period for evaluation	'12 months	'	'
Number of consolidated apartment communities sold	29	75	67
Number of units in consolidated apartment communities sold	6,953	11,232	10,912
Prepayment penalties treated as reduction of gain upon repayment of property debt collateralized by apartment communities sold	$16.50	$16.50	$14.90
Assets Held-for-sale [Member]	'	'	'
Long Lived Assets Held-for-sale [Line Items]	'	'	'
Number of apartment communities	0	29	'
Number of homes in apartment communities	'	6,953	'

Earnings_Loss_per_ShareUnit_De

Earnings (Loss) per Share/Unit (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Numerator:

Income (loss) from continuing operations

$26,804

[1]

$6,977

[1]

$2,477

[1]

($1,662)

[1]

$7,839

[1]

$5,369

[1]

($5,670)

[1]

($26,294)

[1]

$34,596

($18,756)

($136,237)

Loss (income) from continuing operations attributable to noncontrolling interests

10,555

-11,034

36,455

Income attributable to preferred stockholders

-2,804

-49,888

-45,852

Income attributable to participating securities

-813

-422

-222

Income (loss) from continuing operations attributable to Aimco common stockholders

41,534

-80,100

-145,856

Income from discontinued operations, net

121,799

[1]

72,433

[1]

4,502

[1]

4,495

[1]

89,409

[1]

47,966

[1]

39,801

[1]

36,941

[1]

203,229

214,117

78,073

Income from discontinued operations attributable to noncontrolling interests

-41,090

-51,871

-35,378

Income from discontinued operations attributable to Aimco

162,139

162,246

42,695

Net income (loss)

148,603

[1]

79,410

[1]

6,979

[1]

2,833

[1]

97,248

[1]

53,335

[1]

34,131

[1]

10,647

[1]

237,825

195,361

-58,164

Net (income) loss attributable to noncontrolling interests

-30,535

-62,905

1,077

Net income attributable to the company's preferred equityholders

-2,804

-49,888

-45,852

Net income attributable to participating securities

-813

-422

-222

Net income (loss) attributable to the company's common equityholders

122,037

[1]

66,268

[1]

10,107

[1]

5,050

[1]

67,928

[1]

24,163

[1]

523

[1]

-10,609

[1]

203,673

82,146

-103,161

Denominator:

Weighted average common shares/units outstanding - basic

145,341

[1]

145,334

[1]

145,321

[1]

145,169

[1]

145,291

134,479

119,312

Dilutive potential common shares/units

-241

Weighted average common shares/units outstanding - diluted

145,499

145,563

145,674

145,169

145,532

134,479

119,312

Earnings (loss) per common share/unit - basic and diluted

Loss from continuing operations attributable to the company's common equityholders (In dollars per share/unit)s

$0.25

$0.04

$0.01

($0.01)

($0.07)

($0.25)

($0.30)

$0.29

($0.60)

($1.22)

Income from discontinued operations attributable to the company's common equityholders (In dollars per share/unit)

$1.11

$1.21

$0.36

Net income (loss) attributable to the company's common equityholders (In dollars per share/unit)

$0.84

$0.46

$0.07

$0.03

$0.47

$0.17

($0.09)

$1.40

$0.61

($0.86)

Dividends declared per common share/unit

$0.96

$0.76

$0.48

AIMCO PROPERTIES, L.P

Numerator:

Income (loss) from continuing operations

26,804

[1]

6,977

[1]

2,477

[1]

-1,662

[1]

7,839

[1]

5,369

[1]

-5,670

[1]

-26,294

[1]

34,596

-18,756

-134,938

Loss (income) from continuing operations attributable to noncontrolling interests

19,369

-9,585

32,488

Income attributable to preferred stockholders

-9,227

-56,384

-52,535

Income attributable to participating securities

-813

-422

-222

Income (loss) from continuing operations attributable to Aimco common stockholders

43,925

-85,147

-155,207

Income from discontinued operations, net

121,799

[1]

72,433

[1]

4,502

[1]

4,495

[1]

89,409

[1]

47,966

[1]

39,801

[1]

36,941

[1]

203,229

214,117

78,073

Income from discontinued operations attributable to noncontrolling interests

-31,842

-41,633

-32,231

Income from discontinued operations attributable to Aimco

171,387

172,484

45,842

Net income (loss)

148,603

[1]

79,410

[1]

6,979

[1]

2,833

[1]

97,248

[1]

53,335

[1]

34,131

[1]

10,647

[1]

237,825

195,361

-56,865

Net (income) loss attributable to noncontrolling interests

-12,473

-51,218

257

Net income attributable to the company's preferred equityholders

-9,227

-56,384

-52,535

Net income attributable to participating securities

-813

-422

-222

Net income (loss) attributable to the company's common equityholders

$129,008

[1]

$70,064

[1]

$10,682

[1]

$5,347

[1]

$72,190

[1]

$25,774

[1]

$578

[1]

($11,346)

[1]

$215,312

$87,337

($109,365)

Denominator:

Weighted average common shares/units outstanding - basic

153,276

[1]

153,287

[1]

153,294

[1]

153,169

[1]

153,256

142,614

127,681

Dilutive potential common shares/units

-241

Weighted average common shares/units outstanding - diluted

153,434

153,516

153,647

153,169

153,497

142,614

127,681

Earnings (loss) per common share/unit - basic and diluted

Loss from continuing operations attributable to the company's common equityholders (In dollars per share/unit)s

$0.25

$0.04

$0.01

($0.01)

($0.07)

($0.25)

($0.30)

$0.29

($0.60)

($1.22)

Income from discontinued operations attributable to the company's common equityholders (In dollars per share/unit)

$1.11

$1.21

$0.36

Net income (loss) attributable to the company's common equityholders (In dollars per share/unit)

$0.84

$0.46

$0.07

$0.03

$0.47

$0.17

($0.09)

$1.40

$0.61

($0.86)

Dividends declared per common share/unit

$0.96

$0.76

$0.63

Special Distribution to Common Partnership Units [Member] | AIMCO PROPERTIES, L.P

Earnings (loss) per common share/unit - basic and diluted

Dividends declared per common share/unit

$0.15

[1]

Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

Earnings_Loss_per_ShareUnit_De1

Earnings (Loss) per Share/Unit (Details Textual)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3	'	'
Nonvested Restricted Shares of Common Stock with Non-forfeitable Dividend Rights	0.6	0.5	0.5
Method Used In Calculating Earnings Per Share	'two-class method	'	'
Number of Sares of Cmmon Stock Required to Redeem Preferred OP Units Tendered for Redemption, if Parent Chooses to Redeem in Sares Rther than Cash	3.1	'	'

Unaudited_Summarized_Consolida2

Unaudited Summarized Consolidated Quarterly Information (Details) (USD $)	3 Months Ended																12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summarized unaudited consolidated quarterly information	'		'		'		'		'		'		'		'		'	'	'
Total revenues	$250,862	[1]	$243,943	[1]	$241,744	[1]	$237,504	[1]	$247,705	[1]	$242,973	[1]	$236,085	[1]	$231,748	[1]	$974,053	$958,511	$914,355
Total operating expenses	-177,707	[1]	-179,430	[1]	-183,033	[1]	-184,864	[1]	-192,338	[1]	-197,071	[1]	-190,343	[1]	-199,743	[1]	-725,034	-779,495	-779,064
Operating income	73,155	[1]	64,513	[1]	58,711	[1]	52,640	[1]	55,367	[1]	45,902	[1]	45,742	[1]	32,005	[1]	249,019	179,016	135,291
Income (loss) from continuing operations	26,804	[1]	6,977	[1]	2,477	[1]	-1,662	[1]	7,839	[1]	5,369	[1]	-5,670	[1]	-26,294	[1]	34,596	-18,756	-136,237
Income from discontinued operations, net	121,799	[1]	72,433	[1]	4,502	[1]	4,495	[1]	89,409	[1]	47,966	[1]	39,801	[1]	36,941	[1]	203,229	214,117	78,073
Net income	148,603	[1]	79,410	[1]	6,979	[1]	2,833	[1]	97,248	[1]	53,335	[1]	34,131	[1]	10,647	[1]	237,825	195,361	-58,164
Net income (loss) attributable to the company's common equityholders	122,037	[1]	66,268	[1]	10,107	[1]	5,050	[1]	67,928	[1]	24,163	[1]	523	[1]	-10,609	[1]	203,673	82,146	-103,161
Loss from continuing operations attributable to the company's common equityholders (In dollars per share/unit)s	$0.25		$0.04		$0.01		($0.01)		($0.01)		($0.07)		($0.25)		($0.30)		$0.29	($0.60)	($1.22)
Net income attributable to the company's common equityholders (In dollars per share/unit)	$0.84		$0.46		$0.07		$0.03		$0.47		$0.17		$0		($0.09)		$1.40	$0.61	($0.86)
Loss per common share - basic and diluted:	'		'		'		'		'		'		'		'		'	'	'
Weighted average common shares/units outstanding - basic	145,341	[1]	145,334	[1]	145,321	[1]	145,169	[1]	'		'		'		'		145,291	134,479	119,312
Weighted average common shares/units outstanding - diluted	145,499		145,563		145,674		145,169		'		'		'		'		145,532	134,479	119,312
Weighted average common shares/units outstanding - basic and diluted	'		'		'		'		145,035	[1]	144,959	[1]	127,395	[1]	120,526	[1]	'	'	'
AIMCO PROPERTIES, L.P	'		'		'		'		'		'		'		'		'	'	'
Summarized unaudited consolidated quarterly information	'		'		'		'		'		'		'		'		'	'	'
Total revenues	250,862	[1]	243,943	[1]	241,744	[1]	237,504	[1]	247,705	[1]	242,973	[1]	236,085	[1]	231,748	[1]	974,053	958,511	914,355
Total operating expenses	-177,707	[1]	-179,430	[1]	-183,033	[1]	-184,864	[1]	-192,338	[1]	-197,071	[1]	-190,343	[1]	-199,743	[1]	-725,034	-779,495	-779,064
Operating income	73,155	[1]	64,513	[1]	58,711	[1]	52,640	[1]	55,367	[1]	45,902	[1]	45,742	[1]	32,005	[1]	249,019	179,016	135,291
Income (loss) from continuing operations	26,804	[1]	6,977	[1]	2,477	[1]	-1,662	[1]	7,839	[1]	5,369	[1]	-5,670	[1]	-26,294	[1]	34,596	-18,756	-134,938
Income from discontinued operations, net	121,799	[1]	72,433	[1]	4,502	[1]	4,495	[1]	89,409	[1]	47,966	[1]	39,801	[1]	36,941	[1]	203,229	214,117	78,073
Net income	148,603	[1]	79,410	[1]	6,979	[1]	2,833	[1]	97,248	[1]	53,335	[1]	34,131	[1]	10,647	[1]	237,825	195,361	-56,865
Net income (loss) attributable to the company's common equityholders	$129,008	[1]	$70,064	[1]	$10,682	[1]	$5,347	[1]	$72,190	[1]	$25,774	[1]	$578	[1]	($11,346)	[1]	$215,312	$87,337	($109,365)
Loss from continuing operations attributable to the company's common equityholders (In dollars per share/unit)s	$0.25		$0.04		$0.01		($0.01)		($0.01)		($0.07)		($0.25)		($0.30)		$0.29	($0.60)	($1.22)
Net income attributable to the company's common equityholders (In dollars per share/unit)	$0.84		$0.46		$0.07		$0.03		$0.47		$0.17		$0		($0.09)		$1.40	$0.61	($0.86)
Loss per common share - basic and diluted:	'		'		'		'		'		'		'		'		'	'	'
Weighted average common shares/units outstanding - basic	153,276	[1]	153,287	[1]	153,294	[1]	153,169	[1]	'		'		'		'		153,256	142,614	127,681
Weighted average common shares/units outstanding - diluted	153,434		153,516		153,647		153,169		'		'		'		'		153,497	142,614	127,681
Weighted average common shares/units outstanding - basic and diluted	'		'		'		'		153,107	[1]	152,997	[1]	135,622	[1]	128,729	[1]	'	'	'

[1]	Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

Business_Segments_Details

Business Segments (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Summary information for the reportable segments

Rental and other property revenues (2)

$939,231

$916,742

$875,694

Tax credit and asset management revenues

34,822

41,769

38,661

Total revenues

250,862

[1]

243,943

[1]

241,744

[1]

237,504

[1]

247,705

[1]

242,973

[1]

236,085

[1]

231,748

[1]

974,053

958,511

914,355

Property operating expenses (2)

375,672

374,347

376,164

Investment management expenses

4,341

12,008

10,459

Depreciation and amortization (2)

291,910

[2]

325,173

[2]

323,233

[2]

Provision for real estate impairment losses (2)

6,235

[2]

General and administrative expenses

45,708

49,602

50,906

Other expenses, net

7,403

12,130

18,302

Total operating expenses

177,707

[1]

179,430

[1]

183,033

[1]

184,864

[1]

192,338

[1]

197,071

[1]

190,343

[1]

199,743

[1]

725,034

779,495

779,064

Net operating income (loss)

73,155

[1]

64,513

[1]

58,711

[1]

52,640

[1]

55,367

[1]

45,902

[1]

45,742

[1]

32,005

[1]

249,019

179,016

135,291

Other items included in continuing operations

-214,423

-197,772

-271,528

[3]

Income (loss) from continuing operations

26,804

[1]

6,977

[1]

2,477

[1]

-1,662

[1]

7,839

[1]

5,369

[1]

-5,670

[1]

-26,294

[1]

34,596

-18,756

-136,237

Conventional Real Estate Operations [Member]

Summary information for the reportable segments

Rental and other property revenues (2)

803,242

[2]

761,876

[2]

724,866

[2]

Tax credit and asset management revenues

Total revenues

803,242

761,876

724,866

Property operating expenses (2)

285,062

[2]

274,414

[2]

263,969

[2]

Investment management expenses

Depreciation and amortization (2)

[2]

Provision for real estate impairment losses (2)

[2]

General and administrative expenses

Other expenses, net

Total operating expenses

285,062

274,414

263,969

Net operating income (loss)

518,180

487,462

460,897

Other items included in continuing operations

[3]

Income (loss) from continuing operations

518,180

487,462

460,897

Affordable Real Estate Operations [Member]

Summary information for the reportable segments

Rental and other property revenues (2)

98,713

[2]

97,135

[2]

94,007

[2]

Tax credit and asset management revenues

Total revenues

98,713

97,135

94,007

Property operating expenses (2)

39,717

[2]

38,932

[2]

37,096

[2]

Investment management expenses

Depreciation and amortization (2)

[2]

Provision for real estate impairment losses (2)

[2]

General and administrative expenses

Other expenses, net

Total operating expenses

39,717

38,932

37,096

Net operating income (loss)

58,996

58,203

56,911

Other items included in continuing operations

[3]

Income (loss) from continuing operations

58,996

58,203

56,911

Proportionate Adjustments [Member]

Summary information for the reportable segments

Rental and other property revenues (2)

37,201

[2],[4]

57,251

[2],[4]

55,627

[2],[4]

Tax credit and asset management revenues

[4]

Total revenues

37,201

[2],[4]

57,251

[4]

55,627

[4]

Property operating expenses (2)

13,406

[2],[4]

23,562

[2],[4]

22,140

[2],[4]

Investment management expenses

[4]

Depreciation and amortization (2)

[2],[4]

Provision for real estate impairment losses (2)

[2],[4]

General and administrative expenses

[4]

Other expenses, net

[4]

Total operating expenses

13,406

[4]

23,562

[4]

22,140

[4]

Net operating income (loss)

23,795

[4]

33,689

[4]

33,487

[4]

Other items included in continuing operations

[4]

[3],[4]

Income (loss) from continuing operations

23,795

[4]

33,689

[4]

33,487

[4]

Corporate and Amounts Not Allocated to Segments [Member]

Summary information for the reportable segments

Rental and other property revenues (2)

[2]

480

[2]

1,194

[2]

Total revenues

34,897

42,249

39,855

Property operating expenses (2)

37,487

[2]

37,439

[2]

52,959

Total operating expenses

386,849

442,587

455,859

Net operating income (loss)

-351,952

-400,338

-416,004

Income (loss) from continuing operations

($566,375)

($598,110)

($687,532)

[1]

Certain reclassifications have been made to 2013 and 2012 quarterly amounts to conform to the full year 2013 presentation, primarily related to treatment of discontinued operations.

[2]

Proportionate property net operating income, our key measurement of segment profit or loss, excludes property management revenues (which are included in rental and other property revenues), property management expenses and casualty gains and losses (which are included in property operating expenses), depreciation and amortization and provision for real estate impairment losses. Accordingly, we do not allocate these amounts to our segments.

[3]

In addition to the other items included in continuing operations presented in the table for the year ending DecemberÂ 31, 2011, the Aimco Operating Partnership recognized $1.3 million of interest income on its notes receivable from Aimco. These notes were repaid by Aimco during the three months ended DecemberÂ 31, 2011.

[4]

Represents adjustments for the noncontrolling interests in consolidated real estate partnershipsâ€™ 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.

Business_Segments_Details_1

Business Segments (Details 1) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]	'		'
Total consolidated assets	$6,079,413		$6,401,380
Conventional Real Estate Operations [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Total consolidated assets	4,793,472		4,837,236
Affordable Real Estate Operations [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Total consolidated assets	382,091		466,678
Proportionate Adjustments [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Total consolidated assets	428,376	[1]	634,858	[1]
Corporate and Amounts Not Allocated to Segments [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Total consolidated assets	$475,474		$462,608

[1]	Represents adjustments for the noncontrolling interests in consolidated real estate partnershipsâ€™ share of the assets of our consolidated apartment communities, which are excluded from our measurement of segment financial condition, and our share of the assets of our unconsolidated real estate partnerships, which are included in our measure of segment financial condition.

Business_Segments_Details_Text

Business Segments (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Number of reportable segments	2	'	'
AIMCO PROPERTIES, L.P	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Interest income recognized from notes receivable from Aimco	'	'	$1.30
Conventional Real Estate Operations [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Captial Additions	365.3	252.3	191.6
Affordable Real Estate Operations [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Captial Additions	$10.70	$19.80	$15.60
Affordable Real Estate [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Number of apartment communities in segments	74	'	'
Number of homes in apartment communities	10,067	'	'
Conventional Real Estate [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Number of apartment communities in segments	162	'	'
Number of homes in apartment communities	50,486	'	'

Real_Estate_and_Accumulated_De1

Real Estate and Accumulated Depreciation (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Continuing Operations [Member]

Total Conventional Properties [Member]

100 Forest Place [Member]

118-122 West 23rd Street [Member]

1582 First Avenue [Member]

173 E. 90th Street [Member]

182-188 Columbus Avenue [Member]

204-206 West 133rd Street [Member]

2232-2240 Seventh Avenue [Member]

2247-2253 Seventh Avenue [Member]

2252-2258 Seventh Avenue [Member]

2300-2310 Seventh Avenue [Member]

236-238 East 88th Street [Member]

237-239 Ninth Avenue [Member]

240 West 73rd Street, LLC [Member]

2484 Seventh Avenue [Member]

2900 on First Apartments [Member]

306 East 89th Street [Member]

311 & 313 East 73rd Street [Member]

322-324 East 61st Street [Member]

3400 Avenue of the Arts [Member]

452 East 78th Street [Member]

464-466 Amsterdam & 200-210 W. 83rd Street [Member]

510 East 88th Street [Member]

514-516 East 88th Street [Member]

707 Leahy [Member]

865 Bellevue [Member]

Arbours of Hermitage, The [Member]

Auburn Glen [Member]

Bank Lofts [Member]

Bay Parc Plaza [Member]

Bay Ridge at Nashua [Member]

Bayberry Hill Estates [Member]

Bluffs at Pacifica, The [Member]

Boston Lofts [Member]

Boulder Creek [Member]

Broadcast Center [Member]

Broadway Lofts [Member]

Buena Vista [Member]

Burke Shire Commons [Member]

Calhoun Beach Club [Member]

Canterbury Green [Member]

Canyon Terrace [Member]

Casa del Mar at Baymeadows [Member]

Cedar Rim [Member]

Center Square [Member]

Charlesbank Apartment Homes [Member]

Chestnut Hall [Member]

Chestnut Hill Village [Member]

Chimneys of Cradle Rock [Member]

Colony at Kenilworth [Member]

Columbus Avenue [Member]

Creekside [Member]

Crescent at West Hollywood, The [Member]

Elm Creek [Member]

Evanston Place [Member]

Farmingdale [Member]

Flamingo Towers [Member]

Four Quarters Habitat [Member]

Foxchase [Member]

Georgetown [Member]

Granada [Member]

Grand Pointe [Member]

Greens [Member]

Heritage Park Escondido [Member]

Heritage Park Livermore [Member]

Heritage Village Anaheim [Member]

Hidden Cove [Member]

Hidden Cove II [Member]

Hillcreste [Member]

Hillmeade [Member]

Horizons West Apartments [Member]

Hunt Club [Member]

Hunters Chase [Member]

Hunters Glen [Member]

Hyde Park Tower [Member]

Indian Oaks [Member]

Island Club [Member]

Key Towers [Member]

Lakeside [Member]

Lakeside at Vinings Mountain [Member]

Latrobe [Member]

Lazy Hollow [Member]

Lincoln Place Garden (5) [Member]

Lodge at Chattahoochee, The [Member]

Los Arboles [Member]

Malibu Canyon [Member]

Maple Bay [Member]

Mariners Cove [Member]

Meadow Creek [Member]

Merrill House [Member]

Monterey Grove [Member]

Oak Park Village [Member]

Ocean House on Prospect [Member]

Pacific Bay Vistas (5) [Member]

Pacifica Park [Member]

Palazzo at Park La Brea, The [Member]

Palazzo East at Park La Brea, The [Member]

Paradise Palms [Member]

Park & 12th [Member]

Park Towne Place [Member]

Parktown Townhouses [Member]

Parkway [Member]

Pathfinder Village [Member]

Peachtree Park [Member]

Peak At Vinings Mountain, The [Member]

Peakview Place [Member]

Peppertree [Member]

Pine Lake Terrace [Member]

Plantation Gardens [Member]

Post Ridge [Member]

Preserve at Marin [Member]

Ramblewood [Member]

Ravensworth Towers [Member]

Reflections [Member]

Remington at Ponte Vedra Lakes [Member]

River Club, The [Member]

Riverloft [Member]

Riverside [Member]

Rosewood [Member]

Royal Crest Estates [Member]

Runaway Bay [Member]

San Melia [Member]

Savannah Trace [Member]

Scotchollow [Member]

Shenandoah Crossing [Member]

Signal Pointe [Member]

Signature Point [Member]

Springwoods at Lake Ridge [Member]

Spyglass at Cedar Cove [Member]

Stafford [Member]

Steeplechase [Member]

Sterling Apartment Homes, The [Member]

Stone Creek Club [Member]

Tamarac Village [Member]

Towers Of Westchester Park, The [Member]

Township At Highlands [Member]

Twin Lake Towers [Member]

Vantage Pointe [Member]

Views at Vinings Mountain, The [Member]

Villa Del Sol [Member]

Village in the Woods [Member]

Village of Pennbrook [Member]

Villages of Baymeadows [Member]

Villas at Park La Brea, The [Member]

Vista Del Lagos [Member]

Waterford Village [Member]

Waterways Village [Member]

Waverly Apartments [Member]

Wexford Village [Member]

Willow Bend [Member]

Windrift [Member]

Windsor Crossing [Member]

Windsor Park [Member]

Woods of williamsburg [Member]

Yacht Club at Brickell [Member]

Yorktown Apartments [Member]

Total Affordable Properties [Member]

All Hallows [Member]

Arvada House [Member]

Bayview [Member]

Beacon Hill [Member]

Biltmore Towers [Member]

Butternut Creek [Member]

Carriage House [Member]

City Line [Member]

Copperwood I Apartments [Member]

Copperwood II Apartments [Member]

Country Club Heights [Member]

Crevenna Oaks [Member]

Fairwood [Member]

Fountain Place [Member]

Friendset Apartments [Member]

Hopkins Village [Member]

Hudson Gardens [Member]

Ingram Square [Member]

Kirkwood House [Member]

La Salle [Member]

La Vista [Member]

Loring Towers [Member]

Loring Towers Apartments [Member]

Montblanc Gardens [Member]

New Baltimore [Member]

Newberry Park [Member]

Northpoint [Member]

Panorama Park [Member]

Parc Chateau I [Member]

Parc Chateau II [Member]

Park Place [Member]

Parkways, The [Member]

Pavilion [Member]

Pleasant Hills [Member]

Plummer Village [Member]

Riverwoods [Member]

Round Barn Manor [Member]

San Jose Apartments [Member]

San Juan Del Centro [Member]

Shoreview [Member]

South Bay Villa [Member]

St.George Villas [Member]

Stonegate Apts [Member]

Summit Oaks [Member]

Tamarac Pines Apartments I [Member]

Tamarac Pines Apartments II [Member]

Terry Manor [Member]

Tompkins Terrace [Member]

University Square [Member]

Van Nuys Apartments [Member]

Verdes Del Oriente [Member]

Villas of Mount Dora [Member]

Wah Luck House [Member]

Walnut Hills [Member]

Washington Square West [Member]

Whitefield Place [Member]

Winter Gardens [Member]

Woodland Hills [Member]

Other [Member]

Property

Continuing Operations [Member]

Property

Real Estate and Accumulated Depreciation [Line Items]

Property Type

'High Rise

'Mid Rise

'High Rise

'Mid Rise

'High Rise

'Mid Rise

'High Rise

'Mid Rise

'High Rise

'Mid Rise

'High Rise

'Garden

[1]

'High Rise

'Garden

'High Rise

'Garden

'High Rise

'Mid Rise

'Garden

'High Rise

'Garden

'High Rise

'Mid Rise

'High Rise

'Garden

'Mid Rise

'Garden

'Mid Rise

'High Rise

'Mid Rise

'High Rise

'Garden

'Mid Rise

'Garden

'Mid Rise

'Garden

'High Rise

'Garden

'High Rise

'Garden

'High Rise

'Garden

[1]

'Garden

'High Rise

'Garden

'Mid Rise

'Garden

[1]

'Garden

'Mid Rise

'Garden

'Mid Rise

'High Rise

'Garden

'Mid Rise

'Garden

'High Rise

'Garden

'High Rise

'Garden

'High Rise

'Garden

'High Rise

'Town Home

'High Rise

'Mid Rise

'Garden

'High Rise

'Garden

'High Rise

'Garden

'High Rise

'Mid Rise

'Garden

'Town Home

'Garden

'Mid Rise

'High Rise

'Mid Rise

'Garden

'High Rise

'Garden

'High Rise

'Town Home

'Mid Rise

'Garden

'Mid Rise

'Garden

'High Rise

'Garden

'Mid Rise

'High Rise

'Garden

'Mid Rise

'Garden

'Mid Rise

'Town Home

'Garden

'Mid Rise

'Garden

'High Rise

'Garden

[1]

'High Rise

'Mid Rise

'Garden

'High Rise

'Garden

Date Consolidated

'Dec-97

[2]

'Jun-12

[2]

'Mar-05

[2]

'May-04

[2]

'Feb-07

[2]

'Jun-07

[2]

'Jun-07

[2]

'Jun-07

[2]

'Jun-07

[2]

'Jun-07

[2]

'Jan-04

[2]

'Mar-05

[2]

'Sep-04

[2]

'Jun-07

[2]

'Oct-08

[2]

'Jul-04

[2]

'Mar-03

[2]

'Mar-05

[2]

'Mar-02

[2]

'Jan-04

[2]

'Feb-07

[2]

'Jan-04

[2]

'Mar-05

[2]

'Apr-07

[2]

'Jul-00

[2]

'Jul-00

[2]

'Dec-06

[1],[2]

'Apr-01

[2]

'Sep-04

[2]

'Jan-03

[2]

'Aug-02

[2]

'Oct-06

[2]

'Apr-01

[2]

'Jul-94

[2]

'Mar-02

[2]

'Sep-12

[2]

'Jan-06

[2]

'Mar-01

[2]

'Dec-98

[2]

'Dec-99

[2]

'Mar-02

[2]

'Oct-06

[2]

'Apr-00

[2]

'Oct-99

[2]

'Sep-13

[2]

'Oct-06

[2]

'Apr-00

[2]

'Jun-04

[2]

'Oct-99

[2]

'Sep-03

[2]

'Jan-00

[2]

'Mar-02

[2]

'Dec-97

[2]

'Dec-97

[2]

'Oct-00

[2]

'Sep-97

[2]

'Jan-06

[2]

'Dec-97

[2]

'Aug-02

[2]

'Aug-02

[2]

'Dec-99

[2]

'Jul-94

[2]

'Oct-00

[2]

'Oct-00

[2]

'Oct-00

[2]

'Jul-98

[2]

'Jul-07

[2]

'Mar-02

[2]

'Nov-94

[2]

'Dec-06

[2]

'Sep-00

[2]

'Jan-01

[2]

'Oct-99

[2]

'Oct-04

[2]

'Mar-02

[2]

'Oct-00

[2]

'Apr-01

[2]

'Oct-99

[2]

'Jan-00

[2]

'Jan-03

[2]

'Apr-05

[2]

'Oct-04

[1],[2]

'Oct-99

[2]

'Sep-97

[2]

'Mar-02

[2]

'Dec-99

[2]

'Mar-02

[2]

'Jul-94

[2]

'Jan-00

[2]

'Jun-08

[2]

'Oct-00

[2]

'Apr-13

[2]

'Mar-01

[1],[2]

'Jul-06

[2]

'Feb-04

[2]

'Mar-05

[2]

'Jul-94

[2]

'Jul-13

[2]

'Apr-00

[2]

'Oct-99

[2]

'Mar-00

[2]

'Jan-06

[2]

'Jan-96

[2]

'Jan-00

[2]

'Jan-00

[2]

'Mar-02

[2]

'Mar-02

[2]

'Oct-99

[2]

'Jul-00

[2]

'Aug-11

[2]

'Dec-99

[2]

'Jun-04

[2]

'Sep-00

[2]

'Dec-06

[2]

'Apr-05

[2]

'Oct-99

[2]

'Apr-00

[2]

'Mar-02

[2]

'Aug-02

[2]

'Aug-02

[2]

'Aug-02

[2]

'Aug-02

[2]

'Oct-00

[2]

'Mar-12

[2]

'Mar-01

[2]

'Jan-06

[2]

'Sep-00

[2]

'Oct-99

[2]

'Nov-96

[2]

'Jul-02

[2]

'Sep-00

[2]

'Oct-02

[2]

'Sep-00

[2]

'Oct-99

[2]

'Sep-00

[2]

'Apr-00

[2]

'Jan-06

[2]

'Nov-96

[2]

'Oct-99

[2]

'Aug-02

[2]

'Jan-06

[2]

'Mar-02

[2]

'Jan-00

[2]

'Oct-98

[2]

'Oct-99

[2]

'Mar-02

[2]

'Dec-97

[2]

'Aug-02

[2]

'Jun-97

[2]

'Aug-08

[2]

'Aug-02

[2]

'May-98

[2]

'Mar-01

[2]

'Mar-00

[2]

'Mar-01

[2]

'Jan-06

[2]

'Dec-03

[2]

'Dec-99

[2]

'Jan-06

[2]

'Nov-04

[2]

'Jun-05

[2]

'Mar-02

[2]

'Mar-02

[2]

'Jan-06

[2]

'Dec-06

[2]

'Mar-02

[2]

'Apr-06

[2]

'Oct-05

[2]

'Mar-04

[2]

'Jan-06

[2]

'Jan-06

[2]

'Jan-06

[2]

'Jan-06

[2]

'Sep-03

[2]

'Mar-02

[2]

'Jan-06

[2]

'Sep-04

[2]

'Oct-00

[2]

'Jan-06

[2]

'Oct-02

[2]

'Sep-03

[2]

'Dec-03

[2]

'Mar-02

[2]

'Dec-97

[2]

'Jan-00

[2]

'Mar-02

[2]

'Jan-06

[2]

'Jan-06

[2]

'Jun-05

[2]

'Jun-04

[2]

'Mar-04

[2]

'Apr-05

[2]

'Mar-02

[2]

'Jan-06

[2]

'Mar-02

[2]

'Sep-05

[2]

'Sep-05

[2]

'Oct-99

[2]

'Mar-02

[2]

'Jan-06

[2]

'Jul-09

[2]

'Jan-06

[2]

'Nov-04

[2]

'Nov-04

[2]

'Oct-05

[2]

'Oct-02

[2]

'Mar-05

[2]

'Mar-02

[2]

'Jan-10

[2]

'Jan-10

[1],[2]

'Jan-06

[2]

'Jan-06

[2]

'Sep-04

[2]

'Apr-05

[2]

'Mar-04

[2]

'Oct-05

[2]

Property Location

'Oak Park, IL

'New York, NY

'Seattle, WA

'New York, NY

'Costa Mesa, CA

'New York, NY

'Redwood City, CA

'Nashville, TN

'Hermitage, TN

'Jacksonville, FL

[1]

'Denver, CO

'Miami, FL

'Nashua, NH

'Framingham, MA

'Pacifica, CA

'Denver, CO

'Boulder, CO

'Los Angeles, CA

'San Diego, CA

'Pasadena, CA

'Burke, VA

'Minneapolis, MN

'Fort Wayne, IN

'Saugus, CA

'Jacksonville, FL

'Newcastle, WA

'Doylestown, PA

'Watertown, MA

'Philadelphia, PA

'Columbia, MD

'Towson, MD

'New York, NY

'Denver, CO

'West Hollywood, CA

'Elmhurst, IL

'Evanston, IL

'Darien, IL

'Miami Beach, FL

'Miami, FL

'Alexandria, VA

'Framingham, MA

'Columbia, MD

'Chandler, AZ

'Escondido, CA

'Livermore, CA

'Anaheim, CA

'Escondido, CA

'Century City, CA

'Nashville, TN

'Pacifica, CA

'Gaithersburg, MD

'Midlothian, VA

'Plainsboro, NJ

'Chicago, IL

'Simi Valley, CA

'Oceanside, CA

'Alexandria, VA

'Lisle, IL

'Atlanta, GA

'Washington, DC

'Columbia, MD

'Venice, CA

[1]

'Sandy Springs, GA

'Chandler, AZ

'Calabasas, CA

'Virginia Beach, VA

'San Diego, CA

'Boulder, CO

'Falls Church, VA

'San Jose, CA

'Lansing, MI

'La Jolla, CA

'San Bruno, CA

[1]

'Pacifica, CA

'Los Angeles, CA

'Phoenix, AZ

'Atlanta, GA

'Philadelphia, PA

'Deer Park, TX

'Willamsburg, VA

'Fremont, CA

'Atlanta, GA

'Englewood, CO

'Cypress, CA

'Garden Grove, CA

'Plantation ,FL

'Nashville, TN

'Corte Madera, CA

'Wyoming, MI

'Annandale, VA

'Virginia Beach, VA

'Ponte Vedra Beach, FL

'Edgewater, NJ

'Philadelphia, PA

'Alexandria ,VA

'Camarillo, CA

'Warwick, RI

'Nashua, NH

'Marlborough, MA

'North Andover, MA

'Lantana, FL

'Phoenix, AZ

'Shaumburg, IL

'San Mateo, CA

'Fairfax, VA

'Winter Park, FL

'League City, TX

'Woodbridge, VA

'Lexington Park, MD

'Baltimore, MD

'Largo, MD

'Philadelphia, PA

'Germantown, MD

'Denver, CO

'College Park, MD

'Centennial, CO

'Westmont, IL

'Swampscott, MA

'Atlanta, GA

'Norwalk, CA

'Cypress, TX

'Levittown, PA

'Jacksonville, FL

'Los Angeles, CA

'Chandler, AZ

'Bridgewater, MA

'Aventura, FL

'Brighton, MA

'Worcester, MA

'Rolling Meadows, IL

'Oceanside, CA

'Newport News, VA

'Woodbridge, VA

'Williamsburg, VA

'Miami, FL

'Lombard, IL

'San Francisco, CA

'Arvada, CO

'San Francisco, CA

'Hillsdale, MI

'Dayton, OH

'Charlotte, MI

'Petersburg, VA

'Newport News, VA

'The Woodlands, TX

'Quincy, IL

'Burke, VA

'Carmichael, CA

'Connersville, IN

'Brooklyn, NY

'Baltimore, MD

'Pasadena, CA

'San Antonio, TX

'Baltimore, MD

'San Francisco, CA

'Concord, CA

'Minneapolis, MN

'Salem, MA

'Yauco, PR

'New Baltimore, MI

'Chicago, IL

'Bakersfield, CA

'Lithonia, GA

'St Louis, MO

'Chicago, IL

'Philadelphia, PA

'Austin, TX

'North Hills, CA

'Kankakee, IL

'Champaign, IL

'San Antonio, TX

'Boulder, CO

'San Francisco, CA

'Los Angeles, CA

'St. George, SC

'Indianapolis, IN

'Burke, VA

'Woodlands, TX

'Los Angeles, CA

'Beacon, NY

'Philadelphia, PA

'Los Angeles, CA

'San Pedro, CA

'Mt. Dora, FL

[1]

'Washington, DC

'Cincinnati, OH

'Philadelphia, PA

'San Antonio, TX

'St Louis, MO

'Jackson, MI

Year Built

1-Jan-87

1-Jan-00

1-Jan-10

1-Jan-00

1-Jan-21

1-Jan-89

1-Jan-30

1-Jan-04

1-Jan-00

1-Jan-87

1-Jan-00

1-Jan-10

1-Jan-00

1-Jan-73

1-Jan-72

1-Jan-74

[1]

1-Jan-20

1-Jan-00

1-Jan-84

1-Jan-71

1-Jan-63

Jan 1, 1890

1-Jan-73

1-Jan-90

1-Jan-09

1-Jan-73

1-Jan-86

1-Jan-28

1-Jan-70

1-Jan-84

1-Jan-80

1-Jan-75

1-Jan-12

1-Jan-23

1-Jan-63

1-Jan-79

1-Jan-66

Jan 1, 1880

1-Jan-74

1-Jan-85

1-Jan-87

1-Jan-90

1-Jan-75

1-Jan-60

1-Jan-76

1-Jan-40

1-Jan-64

1-Jan-58

1-Jan-72

1-Jan-00

1-Jan-86

1-Jan-88

1-Jan-86

1-Jan-83

1-Jan-86

1-Jan-89

1-Jan-86

1-Jan-70

1-Jan-86

1-Jan-85

1-Jan-76

1-Jan-90

1-Jan-86

1-Jan-64

1-Jan-72

1-Jan-83

1-Jan-80

1-Jan-79

1-Jan-51

[1]

1-Jan-70

1-Jan-86

1-Jan-71

1-Jan-84

1-Jan-68

1-Jan-64

1-Jan-99

1-Jan-72

1-Jan-70

1-Jan-87

[1]

1-Jan-77

1-Jan-02

1-Jan-05

1-Jan-85

1-Jan-12

1-Jan-59

1-Jan-68

1-Jan-71

1-Jan-73

1-Jan-69

1-Jan-80

1-Jan-75

1-Jan-71

1-Jan-72

1-Jan-64

1-Jan-73

1-Jan-74

1-Jan-87

1-Jan-86

1-Jan-98

1-Jan-10

1-Jan-73

1-Jan-76

1-Jan-72

1-Jan-70

1-Jan-87

1-Jan-98

1-Jan-86

1-Jan-71

1-Jan-84

1-Jan-69

1-Jan-94

1-Jan-84

1-Jan-85

Jan 1, 1889

1-Jan-86

1-Jan-61

1-Jan-84

1-Jan-79

1-Jan-72

1-Jan-85

1-Jan-69

1-Jan-87

1-Jan-83

1-Jan-72

1-Jan-83

1-Jan-69

1-Jan-72

1-Jan-02

1-Jan-86

1-Jan-71

1-Jan-94

1-Jan-70

1-Jan-74

1-Jan-69

1-Jan-87

1-Jan-78

1-Jan-87

1-Jan-76

1-Jan-98

1-Jan-71

1-Jan-76

1-Jan-77

1-Jan-76

1-Jan-80

Jan 1, 1885

1-Jan-76

1-Jan-80

1-Jan-81

1-Jan-76

1-Jan-79

1-Jan-80

1-Jan-79

1-Jan-83

1-Jan-80

1-Jan-79

1-Jan-76

1-Jan-81

1-Jan-75

1-Jan-73

1-Jan-82

1-Jan-80

1-Jan-95

1-Jan-21

1-Jan-82

1-Jan-73

1-Jan-74

1-Jan-77

1-Jan-25

1-Jan-76

1-Jan-82

1-Jan-83

1-Jan-79

1-Jan-70

1-Jan-71

1-Jan-76

1-Jan-81

1-Jan-84

1-Jan-20

1-Jan-80

1-Jan-77

1-Jan-74

1-Jan-78

1-Jan-81

1-Jan-76

1-Jan-79

[1]

1-Jan-82

1-Jan-83

1-Jan-82

1-Jan-80

1-Jan-20

1-Jan-80

Number of apartment homes

59,297

50,344

234

200

135

770

110

326

350

251

[1]

117

471

412

424

158

221

279

360

332

1,988

130

144

104

350

315

821

198

383

328

130

400

189

240

1,161

336

2,113

207

325

324

196

167

196

334

118

315

288

336

320

896

155

254

592

140

568

220

175

178

696

[1]

312

232

698

414

500

332

159

224

618

308

[1]

104

521

611

130

959

309

148

246

303

280

296

136

111

372

150

126

1,707

219

480

344

266

184

1,222

152

492

902

473

588

404

488

368

418

640

368

304

180

152

240

537

240

564

303

161

399

180

120

530

722

904

250

200

588

180

103

264

328

404

156

220

125

357

364

8,953

157

146

198

230

100

118

200

150

200

102

259

165

120

261

145

230

250

128

101

304

242

446

296

100

125

156

220

150

156

144

156

170

193

442

299

113

[1]

153

198

132

112

125

[3]

Initial Cost, Land

$1,971,178,000

[4]

$1,923,523,000

[4]

$2,664,000

[4]

$14,985,000

[4]

$4,281,000

[4]

$12,066,000

[4]

$19,123,000

[4]

$4,352,000

[4]

$3,366,000

[4]

$7,356,000

[4]

$4,318,000

[4]

$10,417,000

[4]

$8,820,000

[4]

$8,495,000

[4]

$68,109,000

[4]

$2,601,000

[4]

$19,070,000

[4]

$2,680,000

[4]

$5,678,000

[4]

$6,372,000

[4]

$57,241,000

[4]

$1,982,000

[4]

$25,553,000

[4]

$3,163,000

[4]

$6,282,000

[4]

$15,444,000

[4]

$3,562,000

[4]

$3,217,000

[4]

$7,670,000

[1],[4]

$3,525,000

[4]

$22,680,000

[4]

$3,262,000

[4]

$19,944,000

[4]

$8,108,000

[4]

$3,446,000

[4]

$754,000

[4]

$29,407,000

[4]

$5,367,000

[4]

$9,693,000

[4]

$4,867,000

[4]

$11,708,000

[4]

$13,659,000

[4]

$7,508,000

[4]

$5,039,000

[4]

$761,000

[4]

$582,000

[4]

$3,399,000

[4]

$12,338,000

[4]

$6,469,000

[4]

$2,040,000

[4]

$2,403,000

[4]

$35,527,000

[4]

$3,189,000

[4]

$15,765,000

[4]

$5,910,000

[4]

$3,232,000

[4]

$11,763,000

[4]

$32,239,000

[4]

$2,379,000

[4]

$15,496,000

[4]

$12,351,000

[4]

$4,577,000

[4]

$2,714,000

[4]

$2,303,000

[4]

$1,055,000

[4]

$1,039,000

[4]

$1,832,000

[4]

$3,043,000

[4]

$12,849,000

[4]

$35,862,000

[4]

$2,872,000

[4]

$8,887,000

[4]

$17,859,000

[4]

$7,935,000

[4]

$8,778,000

[4]

$4,731,000

[4]

$24,523,000

[4]

$18,027,000

[4]

$1,526,000

[4]

$5,840,000

[4]

$2,111,000

[4]

$3,459,000

[4]

$2,429,000

[4]

$128,332,000

[1],[4]

$2,335,000

[4]

$1,662,000

[4]

$69,834,000

[4]

$2,597,000

[4]

$1,435,000

[4]

$1,836,000

[4]

$34,325,000

[4]

$10,048,000

[4]

$12,528,000

[4]

$28,694,000

[1],[4]

$12,970,000

[4]

$48,362,000

[4]

$72,578,000

[4]

$647,000

[4]

$2,793,000

[4]

$10,472,000

[4]

$2,572,000

[4]

$386,000

[4]

$19,595,000

[4]

$4,684,000

[4]

$2,651,000

[4]

$3,442,000

[4]

$8,030,000

[4]

$4,124,000

[4]

$3,773,000

[4]

$1,883,000

[4]

$18,179,000

[4]

$8,661,000

[4]

$3,455,000

[4]

$15,988,000

[4]

$18,795,000

[4]

$30,579,000

[4]

$2,120,000

[4]

$10,493,000

[4]

$12,430,000

[4]

$22,433,000

[4]

$68,230,000

[4]

$25,178,000

[4]

$51,292,000

[4]

$5,935,000

[4]

$16,631,000

[4]

$13,960,000

[4]

$49,475,000

[4]

$18,200,000

[4]

$2,392,000

[4]

$2,810,000

[4]

$5,587,000

[4]

$3,241,000

[4]

$562,000

[4]

$3,675,000

[4]

$8,871,000

[4]

$13,593,000

[4]

$4,224,000

[4]

$15,198,000

[4]

$1,536,000

[4]

$3,268,000

[4]

$4,748,000

[4]

$610,000

[4]

$7,476,000

[4]

$3,463,000

[4]

$10,240,000

[4]

$4,860,000

[4]

$8,630,000

[4]

$804,000

[4]

$29,110,000

[4]

$4,504,000

[4]

$7,920,000

[4]

$6,349,000

[4]

$2,717,000

[4]

$24,960,000

[4]

$131,000

[4]

$4,279,000

[4]

$798,000

[4]

$31,362,000

[4]

$3,055,000

[4]

$46,966,000

[4]

$1,338,000

[4]

$405,000

[4]

$582,000

[4]

$1,094,000

[4]

$1,814,000

[4]

$505,000

[4]

$716,000

[4]

$500,000

[4]

$383,000

[4]

$459,000

[4]

$676,000

[4]

$355,000

[4]

$177,000

[4]

$378,000

[4]

$550,000

[4]

$549,000

[4]

$914,000

[4]

$800,000

[4]

$1,337,000

[4]

$1,866,000

[4]

$581,000

[4]

$886,000

[4]

$187,000

[4]

$390,000

[4]

$896,000

[4]

$1,380,000

[4]

$2,510,000

[4]

$521,000

[4]

$592,000

[4]

$596,000

[4]

$705,000

[4]

$3,426,000

[4]

$1,229,000

[4]

$666,000

[4]

$598,000

[4]

$810,000

[4]

$234,000

[4]

$439,000

[4]

$1,476,000

[4]

$1,352,000

[4]

$107,000

[4]

$122,000

[4]

$381,000

[4]

$363,000

[4]

$266,000

[4]

$1,997,000

[4]

$872,000

[4]

$702,000

[4]

$3,576,000

[4]

$1,139,000

[4]

$322,000

[4]

$826,000

[4]

$582,000

[4]

$219,000

[4]

$300,000

[4]

$320,000

[4]

$689,000

[3],[4]

Initial Cost, Buildings and Improvements

3,652,336,000

[4]

3,215,827,000

[4]

18,815,000

[4]

23,459,000

[4]

752,000

[4]

4,535,000

[4]

3,300,000

[4]

1,450,000

[4]

3,785,000

[4]

3,335,000

[4]

4,504,000

[4]

6,964,000

[4]

2,914,000

[4]

1,866,000

[4]

12,140,000

[4]

1,726,000

[4]

17,518,000

[4]

1,006,000

[4]

1,609,000

[4]

2,224,000

[4]

65,506,000

[4]

608,000

[4]

7,101,000

[4]

1,002,000

[4]

2,168,000

[4]

7,909,000

[4]

12,037,000

[4]

12,023,000

[4]

8,191,000

[1],[4]

9,045,000

[4]

41,847,000

[4]

40,713,000

[4]

35,945,000

[4]

4,132,000

[4]

20,589,000

[4]

7,730,000

[4]

41,244,000

[4]

14,442,000

[4]

6,818,000

[4]

23,617,000

[4]

73,334,000

[4]

73,115,000

[4]

6,601,000

[4]

10,562,000

[4]

5,218,000

[4]

4,190,000

[4]

11,726,000

[4]

14,299,000

[4]

49,316,000

[4]

8,108,000

[4]

18,799,000

[4]

9,450,000

[4]

12,698,000

[4]

10,215,000

[4]

30,830,000

[4]

25,546,000

[4]

15,174,000

[4]

39,410,000

[4]

17,199,000

[4]

96,062,000

[4]

13,168,000

[4]

4,057,000

[4]

16,771,000

[4]

713,000

[4]

7,565,000

[4]

9,170,000

[4]

8,541,000

[4]

17,616,000

[4]

6,530,000

[4]

47,216,000

[4]

16,070,000

[4]

6,377,000

[4]

13,149,000

[4]

7,915,000

[4]

47,259,000

[4]

14,927,000

[4]

15,801,000

[4]

28,654,000

[4]

7,050,000

[4]

27,937,000

[4]

11,862,000

[4]

9,103,000

[4]

12,181,000

[4]

10,439,000

[1],[4]

16,370,000

[4]

9,504,000

[4]

53,438,000

[4]

16,141,000

[4]

66,861,000

[4]

24,533,000

[4]

10,831,000

[4]

21,939,000

[4]

16,771,000

[4]

18,805,000

[4]

62,460,000

[1],[4]

6,579,000

[4]

125,464,000

[4]

136,503,000

[4]

3,516,000

[4]

6,662,000

[4]

47,301,000

[4]

12,051,000

[4]

2,834,000

[4]

14,838,000

[4]

11,713,000

[4]

13,660,000

[4]

18,734,000

[4]

5,225,000

[4]

6,035,000

[4]

19,443,000

[4]

6,712,000

[4]

30,132,000

[4]

61,082,000

[4]

17,157,000

[4]

13,684,000

[4]

18,650,000

[4]

30,638,000

[4]

11,287,000

[4]

65,474,000

[4]

8,060,000

[4]

24,095,000

[4]

45,562,000

[4]

28,786,000

[4]

36,807,000

[4]

16,052,000

[4]

55,679,000

[4]

20,732,000

[4]

17,756,000

[4]

57,198,000

[4]

11,358,000

[4]

17,579,000

[4]

7,284,000

[4]

5,094,000

[4]

4,033,000

[4]

16,111,000

[4]

55,365,000

[4]

9,347,000

[4]

23,491,000

[4]

22,029,000

[4]

9,773,000

[4]

18,763,000

[4]

10,089,000

[4]

5,026,000

[4]

4,861,000

[4]

15,787,000

[4]

38,222,000

[4]

33,956,000

[4]

48,871,000

[4]

4,951,000

[4]

28,101,000

[4]

11,064,000

[4]

11,347,000

[4]

17,939,000

[4]

15,437,000

[4]

17,590,000

[4]

2,110,000

[4]

15,970,000

[4]

3,657,000

[4]

32,214,000

[4]

18,162,000

[4]

420,636,000

[4]

29,770,000

[4]

3,314,000

[4]

15,265,000

[4]

7,044,000

[4]

6,411,000

[4]

3,617,000

[4]

2,886,000

[4]

2,014,000

[4]

8,373,000

[4]

5,553,000

[4]

5,715,000

[4]

4,848,000

[4]

5,264,000

[4]

2,091,000

[4]

16,304,000

[4]

5,973,000

[4]

1,548,000

[4]

3,136,000

[4]

9,358,000

[4]

19,567,000

[4]

4,449,000

[4]

7,445,000

[4]

14,050,000

[4]

3,859,000

[4]

2,360,000

[4]

7,632,000

[4]

14,334,000

[4]

5,520,000

[4]

1,442,000

[4]

2,965,000

[4]

6,327,000

[4]

23,257,000

[4]

15,415,000

[4]

2,631,000

[4]

2,647,000

[4]

4,931,000

[4]

5,134,000

[4]

5,770,000

[4]

7,110,000

[4]

19,071,000

[4]

2,770,000

[4]

1,025,000

[4]

1,920,000

[4]

4,930,000

[4]

2,775,000

[4]

3,195,000

[4]

5,848,000

[4]

6,827,000

[4]

12,201,000

[4]

21,226,000

[4]

7,044,000

[4]

1,828,000

[4]

7,772,000

[4]

5,608,000

[4]

11,169,000

[4]

3,151,000

[4]

3,072,000

[4]

3,875,000

[4]

15,873,000

[3],[4]

Costs Capitalized Subsequent to Consolidation

2,686,634,000

[5]

2,327,334,000

[5]

6,494,000

[5]

3,942,000

[5]

318,000

[5]

2,442,000

[5]

2,608,000

[5]

1,556,000

[5]

1,266,000

[5]

1,649,000

[5]

1,706,000

[5]

4,642,000

[5]

2,097,000

[5]

1,449,000

[5]

8,646,000

[5]

772,000

[5]

17,374,000

[5]

418,000

[5]

543,000

[5]

1,229,000

[5]

72,777,000

[5]

458,000

[5]

4,506,000

[5]

387,000

[5]

775,000

[5]

4,936,000

[5]

28,070,000

[5]

8,376,000

[5]

4,075,000

[1],[5]

2,173,000

[5]

6,979,000

[5]

5,719,000

[5]

12,775,000

[5]

13,692,000

[5]

6,072,000

[5]

18,580,000

[5]

27,142,000

[5]

760,000

[5]

1,499,000

[5]

8,707,000

[5]

50,873,000

[5]

24,041,000

[5]

6,160,000

[5]

2,902,000

[5]

17,029,000

[5]

3,022,000

[5]

23,000

[5]

6,812,000

[5]

48,831,000

[5]

1,243,000

[5]

15,903,000

[5]

4,598,000

[5]

5,479,000

[5]

14,427,000

[5]

30,750,000

[5]

6,229,000

[5]

10,119,000

[5]

240,961,000

[5]

18,160,000

[5]

32,317,000

[5]

2,038,000

[5]

867,000

[5]

5,401,000

[5]

28,836,000

[5]

1,495,000

[5]

1,382,000

[5]

1,513,000

[5]

7,508,000

[5]

6,257,000

[5]

24,470,000

[5]

10,594,000

[5]

1,868,000

[5]

8,445,000

[5]

3,113,000

[5]

42,658,000

[5]

3,373,000

[5]

5,200,000

[5]

14,010,000

[5]

6,262,000

[5]

32,029,000

[5]

15,823,000

[5]

16,140,000

[5]

326,000

[5]

242,465,000

[1],[5]

23,999,000

[5]

2,847,000

[5]

32,554,000

[5]

29,362,000

[5]

7,545,000

[5]

5,717,000

[5]

6,790,000

[5]

3,318,000

[5]

6,025,000

[5]

455,000

[5]

23,061,000

[1],[5]

3,452,000

[5]

21,929,000

[5]

13,319,000

[5]

6,452,000

[5]

14,000

[5]

126,690,000

[5]

13,434,000

[5]

3,055,000

[5]

9,664,000

[5]

12,566,000

[5]

18,412,000

[5]

985,000

[5]

2,393,000

[5]

2,216,000

[5]

18,613,000

[5]

4,587,000

[5]

38,133,000

[5]

10,060,000

[5]

2,566,000

[5]

5,004,000

[5]

4,810,000

[5]

3,051,000

[5]

28,203,000

[5]

86,890,000

[5]

3,806,000

[5]

5,316,000

[5]

9,315,000

[5]

6,772,000

[5]

17,229,000

[5]

8,712,000

[5]

5,018,000

[5]

4,112,000

[5]

11,075,000

[5]

16,755,000

[5]

26,388,000

[5]

2,795,000

[5]

3,292,000

[5]

2,858,000

[5]

4,029,000

[5]

4,954,000

[5]

30,746,000

[5]

6,216,000

[5]

8,856,000

[5]

8,846,000

[5]

6,406,000

[5]

38,188,000

[5]

984,000

[5]

12,136,000

[5]

2,465,000

[5]

10,256,000

[5]

13,191,000

[5]

54,761,000

[5]

4,909,000

[5]

3,334,000

[5]

3,145,000

[5]

4,413,000

[5]

1,808,000

[5]

1,165,000

[5]

25,531,000

[5]

19,610,000

[5]

2,944,000

[5]

5,040,000

[5]

1,305,000

[5]

8,198,000

[5]

32,723,000

[5]

359,300,000

[5]

20,865,000

[5]

2,310,000

[5]

17,474,000

[5]

6,687,000

[5]

13,777,000

[5]

3,847,000

[5]

3,789,000

[5]

7,686,000

[5]

5,529,000

[5]

3,514,000

[5]

4,957,000

[5]

368,000

[5]

267,000

[5]

3,038,000

[5]

1,540,000

[5]

3,613,000

[5]

1,287,000

[5]

5,769,000

[5]

8,585,000

[5]

17,716,000

[5]

4,296,000

[5]

8,262,000

[5]

7,424,000

[5]

653,000

[5]

5,211,000

[5]

445,000

[5]

16,870,000

[5]

1,085,000

[5]

326,000

[5]

293,000

[5]

10,151,000

[5]

20,458,000

[5]

1,905,000

[5]

3,573,000

[5]

1,685,000

[5]

3,539,000

[5]

5,946,000

[5]

11,859,000

[5]

12,822,000

[5]

19,256,000

[5]

3,850,000

[5]

349,000

[5]

486,000

[5]

391,000

[5]

3,845,000

[5]

4,248,000

[5]

6,754,000

[5]

13,782,000

[5]

9,925,000

[5]

21,634,000

[5]

55,000

[5]

290,000

[5]

704,000

[5]

5,505,000

[5]

6,814,000

[5]

2,760,000

[5]

4,662,000

[5]

4,569,000

[5]

[3],[5]

Land

1,881,358,000

1,833,694,000

2,664,000

14,985,000

4,281,000

12,067,000

19,123,000

4,352,000

3,366,000

7,356,000

4,318,000

10,417,000

8,820,000

8,494,000

68,109,000

2,601,000

19,071,000

2,681,000

5,678,000

6,372,000

57,240,000

1,982,000

25,552,000

3,163,000

6,282,000

15,444,000

3,562,000

3,217,000

7,670,000

[1]

3,525,000

22,680,000

3,262,000

19,944,000

8,108,000

3,447,000

755,000

29,407,000

5,367,000

9,693,000

4,867,000

11,708,000

13,659,000

7,508,000

5,039,000

761,000

582,000

3,399,000

12,338,000

6,469,000

2,040,000

2,403,000

35,527,000

3,189,000

15,765,000

5,910,000

3,232,000

11,763,000

32,239,000

2,379,000

15,496,000

12,351,000

4,577,000

2,715,000

2,303,000

1,055,000

1,039,000

1,832,000

3,043,000

12,849,000

35,862,000

2,872,000

8,887,000

17,859,000

7,935,000

8,779,000

4,731,000

24,523,000

18,027,000

1,526,000

5,840,000

2,111,000

3,459,000

2,430,000

44,197,000

[1]

2,335,000

1,662,000

69,834,000

2,598,000

1,435,000

1,836,000

34,325,000

10,048,000

12,528,000

22,994,000

[1]

12,970,000

48,362,000

72,578,000

647,000

2,793,000

10,472,000

2,572,000

386,000

19,595,000

4,683,000

2,651,000

3,443,000

8,030,000

4,125,000

3,773,000

1,883,000

18,179,000

8,661,000

3,455,000

15,988,000

18,795,000

30,579,000

2,120,000

10,492,000

12,430,000

22,433,000

68,231,000

25,178,000

51,292,000

5,934,000

16,631,000

13,960,000

49,474,000

18,200,000

2,392,000

2,810,000

5,587,000

3,241,000

562,000

3,675,000

8,871,000

13,593,000

4,223,000

15,198,000

1,536,000

3,268,000

4,749,000

610,000

7,476,000

3,463,000

10,240,000

4,860,000

8,630,000

804,000

29,110,000

4,504,000

7,920,000

6,349,000

2,717,000

24,960,000

131,000

4,279,000

798,000

31,363,000

3,055,000

46,975,000

1,338,000

405,000

582,000

1,093,000

1,813,000

505,000

716,000

500,000

383,000

459,000

675,000

355,000

176,000

378,000

550,000

549,000

914,000

800,000

1,338,000

1,866,000

581,000

886,000

187,000

391,000

896,000

1,380,000

2,510,000

521,000

592,000

596,000

705,000

3,427,000

1,229,000

667,000

598,000

810,000

234,000

440,000

1,476,000

1,352,000

107,000

122,000

382,000

363,000

266,000

1,997,000

872,000

702,000

3,576,000

1,139,000

328,000

826,000

582,000

219,000

300,000

321,000

689,000

[3]

Buildings and Improvements

6,332,723,000

5,537,450,000

25,309,000

27,401,000

1,070,000

6,976,000

5,908,000

3,006,000

5,051,000

4,984,000

6,210,000

11,606,000

5,011,000

3,316,000

20,786,000

2,498,000

34,891,000

1,423,000

2,152,000

3,453,000

138,284,000

1,066,000

11,608,000

1,389,000

2,943,000

12,845,000

40,107,000

20,399,000

6,562,000

[1]

11,218,000

48,826,000

46,432,000

48,720,000

17,824,000

26,660,000

26,309,000

68,386,000

15,202,000

8,317,000

32,324,000

124,207,000

97,156,000

12,761,000

13,464,000

22,247,000

7,212,000

11,749,000

21,111,000

98,147,000

9,351,000

34,702,000

14,048,000

18,177,000

24,642,000

61,580,000

31,775,000

25,293,000

280,371,000

35,359,000

128,379,000

15,206,000

4,924,000

22,171,000

29,549,000

9,060,000

10,552,000

10,054,000

25,124,000

12,787,000

71,686,000

26,664,000

8,245,000

21,594,000

11,028,000

89,916,000

18,300,000

21,001,000

42,664,000

13,312,000

59,966,000

27,685,000

25,243,000

12,506,000

252,904,000

[1]

40,369,000

12,351,000

85,992,000

45,502,000

74,406,000

30,250,000

17,621,000

25,257,000

22,796,000

19,260,000

85,520,000

[1]

10,031,000

147,393,000

149,822,000

9,968,000

6,676,000

173,991,000

25,485,000

5,889,000

24,502,000

24,280,000

32,072,000

19,718,000

7,618,000

8,250,000

38,056,000

11,299,000

68,265,000

71,142,000

19,723,000

18,688,000

23,460,000

33,689,000

39,490,000

152,365,000

11,866,000

29,411,000

54,876,000

35,558,000

54,036,000

24,765,000

60,697,000

24,844,000

28,832,000

73,953,000

37,746,000

20,374,000

10,576,000

7,952,000

8,062,000

21,065,000

86,111,000

15,563,000

32,348,000

30,875,000

16,179,000

56,951,000

11,072,000

17,162,000

7,326,000

26,043,000

51,413,000

88,717,000

53,780,000

8,285,000

31,246,000

15,477,000

13,155,000

19,104,000

40,968,000

37,200,000

5,054,000

21,010,000

4,962,000

40,411,000

50,885,000

779,400,000

50,635,000

5,624,000

32,739,000

13,732,000

20,189,000

7,464,000

6,675,000

9,700,000

13,902,000

9,067,000

10,673,000

5,216,000

5,532,000

5,129,000

17,844,000

9,586,000

2,835,000

8,905,000

17,942,000

37,283,000

8,745,000

15,707,000

21,474,000

4,511,000

7,571,000

8,077,000

31,204,000

6,605,000

1,768,000

3,258,000

16,478,000

43,714,000

17,320,000

6,204,000

4,331,000

8,470,000

11,080,000

17,629,000

19,931,000

38,327,000

6,620,000

1,374,000

2,406,000

5,320,000

6,620,000

7,443,000

12,602,000

20,609,000

22,126,000

42,860,000

7,099,000

1,585,000

8,476,000

11,113,000

17,983,000

5,911,000

7,734,000

8,443,000

15,873,000

[3]

Total

8,214,081,000

8,333,419,000

8,917,137,000

9,468,165,000

8,214,081,000

[6]

7,371,144,000

[6]

27,973,000

[6]

42,386,000

[6]

5,351,000

[6]

19,043,000

[6]

25,031,000

[6]

7,358,000

[6]

8,417,000

[6]

12,340,000

[6]

10,528,000

[6]

22,023,000

[6]

13,831,000

[6]

11,810,000

[6]

88,895,000

[6]

5,099,000

[6]

53,962,000

[6]

4,104,000

[6]

7,830,000

[6]

9,825,000

[6]

195,524,000

[6]

3,048,000

[6]

37,160,000

[6]

4,552,000

[6]

9,225,000

[6]

28,289,000

[6]

43,669,000

[6]

23,616,000

[6]

14,232,000

[1],[6]

14,743,000

[6]

71,506,000

[6]

49,694,000

[6]

68,664,000

[6]

25,932,000

[6]

30,107,000

[6]

27,064,000

[6]

97,793,000

[6]

20,569,000

[6]

18,010,000

[6]

37,191,000

[6]

135,915,000

[6]

110,815,000

[6]

20,269,000

[6]

18,503,000

[6]

23,008,000

[6]

7,794,000

[6]

15,148,000

[6]

33,449,000

[6]

104,616,000

[6]

11,391,000

[6]

37,105,000

[6]

49,575,000

[6]

21,366,000

[6]

40,407,000

[6]

67,490,000

[6]

35,007,000

[6]

37,056,000

[6]

312,610,000

[6]

37,738,000

[6]

143,875,000

[6]

27,557,000

[6]

9,501,000

[6]

24,886,000

[6]

31,852,000

[6]

10,115,000

[6]

11,591,000

[6]

11,886,000

[6]

28,167,000

[6]

25,636,000

[6]

107,548,000

[6]

29,536,000

[6]

17,132,000

[6]

39,453,000

[6]

18,963,000

[6]

98,695,000

[6]

23,031,000

[6]

45,524,000

[6]

60,691,000

[6]

14,838,000

[6]

65,806,000

[6]

29,796,000

[6]

28,702,000

[6]

14,936,000

[6]

297,101,000

[1],[6]

42,704,000

[6]

14,013,000

[6]

155,826,000

[6]

48,100,000

[6]

74,406,000

[6]

31,685,000

[6]

19,457,000

[6]

59,582,000

[6]

32,844,000

[6]

31,788,000

[6]

108,514,000

[1],[6]

23,001,000

[6]

195,755,000

[6]

222,400,000

[6]

10,615,000

[6]

9,469,000

[6]

184,463,000

[6]

28,057,000

[6]

6,275,000

[6]

44,097,000

[6]

28,963,000

[6]

34,723,000

[6]

23,161,000

[6]

15,648,000

[6]

12,375,000

[6]

41,829,000

[6]

13,182,000

[6]

86,444,000

[6]

79,803,000

[6]

23,178,000

[6]

34,676,000

[6]

42,255,000

[6]

64,268,000

[6]

41,610,000

[6]

162,857,000

[6]

24,296,000

[6]

51,844,000

[6]

123,107,000

[6]

60,736,000

[6]

105,328,000

[6]

30,699,000

[6]

77,328,000

[6]

38,804,000

[6]

78,306,000

[6]

92,153,000

[6]

40,138,000

[6]

23,184,000

[6]

16,163,000

[6]

11,193,000

[6]

8,624,000

[6]

24,740,000

[6]

94,982,000

[6]

29,156,000

[6]

36,571,000

[6]

46,073,000

[6]

17,715,000

[6]

60,219,000

[6]

15,821,000

[6]

17,772,000

[6]

14,802,000

[6]

29,506,000

[6]

61,653,000

[6]

93,577,000

[6]

62,410,000

[6]

9,089,000

[6]

60,356,000

[6]

19,981,000

[6]

21,075,000

[6]

25,453,000

[6]

43,685,000

[6]

62,160,000

[6]

5,185,000

[6]

25,289,000

[6]

5,760,000

[6]

71,774,000

[6]

53,940,000

[6]

826,375,000

[6]

51,973,000

[6]

6,029,000

[6]

33,321,000

[6]

14,825,000

[6]

22,002,000

[6]

7,969,000

[6]

7,391,000

[6]

10,200,000

[6]

14,285,000

[6]

9,526,000

[6]

11,348,000

[6]

5,571,000

[6]

5,708,000

[6]

5,507,000

[6]

18,394,000

[6]

10,135,000

[6]

3,749,000

[6]

9,705,000

[6]

19,280,000

[6]

39,149,000

[6]

9,326,000

[6]

16,593,000

[6]

21,661,000

[6]

4,902,000

[6]

8,467,000

[6]

9,457,000

[6]

33,714,000

[6]

7,126,000

[6]

2,360,000

[6]

3,854,000

[6]

17,183,000

[6]

47,141,000

[6]

17,320,000

[6]

7,433,000

[6]

4,998,000

[6]

9,068,000

[6]

11,890,000

[6]

17,863,000

[6]

20,371,000

[6]

39,803,000

[6]

7,972,000

[6]

1,481,000

[6]

2,528,000

[6]

5,702,000

[6]

6,983,000

[6]

7,709,000

[6]

14,599,000

[6]

21,481,000

[6]

22,828,000

[6]

46,436,000

[6]

8,238,000

[6]

1,913,000

[6]

8,476,000

[6]

11,939,000

[6]

18,565,000

[6]

6,130,000

[6]

8,034,000

[6]

8,764,000

[6]

16,562,000

[3],[6]

Accumulated Depreciation (AD)

-2,822,872,000

-2,820,765,000

-2,872,190,000

-2,934,912,000

-2,822,872,000

-2,424,839,000

-11,077,000

-1,366,000

-452,000

-2,546,000

-2,075,000

-957,000

-1,423,000

-1,768,000

-1,810,000

-4,017,000

-1,737,000

-1,131,000

-6,290,000

-652,000

-5,106,000

-523,000

-1,282,000

-1,368,000

-71,918,000

-416,000

-3,634,000

-457,000

-1,170,000

-4,621,000

-23,536,000

-10,525,000

-4,201,000

[1]

-5,537,000

-12,557,000

-15,956,000

-19,082,000

-7,878,000

-12,087,000

-14,011,000

-31,926,000

-724,000

-2,607,000

-13,704,000

-58,397,000

-54,409,000

-6,305,000

-4,092,000

-17,854,000

-3,605,000

-114,000

-10,199,000

-57,443,000

-3,382,000

-21,537,000

-7,973,000

-10,358,000

-16,813,000

-26,139,000

-14,147,000

-13,304,000

-116,869,000

-19,850,000

-64,462,000

-5,775,000

-2,449,000

-10,457,000

-17,513,000

-5,391,000

-5,920,000

-5,867,000

-12,839,000

-6,137,000

-34,664,000

-14,712,000

-3,011,000

-9,435,000

-4,729,000

-63,437,000

-4,815,000

-8,904,000

-23,271,000

-8,036,000

-38,230,000

-18,631,000

-17,149,000

-6,132,000

-3,581,000

[1]

-25,788,000

-6,212,000

-42,448,000

-29,535,000

-27,789,000

-15,049,000

-7,737,000

-6,919,000

-13,482,000

-480,000

-2,482,000

[1]

-4,280,000

-52,213,000

-50,189,000

-6,693,000

-103,000

-44,061,000

-12,418,000

-3,478,000

-8,827,000

-12,092,000

-21,784,000

-12,555,000

-3,733,000

-3,597,000

-16,587,000

-6,609,000

-25,852,000

-10,593,000

-9,086,000

-7,819,000

-11,350,000

-15,355,000

-102,559,000

-4,720,000

-15,768,000

-32,003,000

-17,052,000

-22,860,000

-11,783,000

-3,999,000

-11,433,000

-11,197,000

-39,732,000

-25,480,000

-8,635,000

-2,868,000

-4,339,000

-5,261,000

-9,981,000

-44,305,000

-8,445,000

-19,640,000

-9,871,000

-9,181,000

-39,046,000

-3,667,000

-14,534,000

-3,799,000

-16,217,000

-28,814,000

-56,918,000

-21,127,000

-3,657,000

-19,908,000

-7,725,000

-3,211,000

-9,139,000

-27,326,000

-24,444,000

-2,680,000

-8,724,000

-3,776,000

-11,061,000

-20,295,000

-398,033,000

-25,568,000

-2,186,000

-18,342,000

-5,802,000

-12,276,000

-5,299,000

-3,321,000

-4,431,000

-11,949,000

-5,253,000

-5,276,000

-2,636,000

-3,828,000

-1,419,000

-10,087,000

-3,455,000

-941,000

-4,623,000

-6,655,000

-22,769,000

-2,805,000

-6,631,000

-7,857,000

-2,697,000

-3,348,000

-3,466,000

-21,833,000

-2,848,000

-1,732,000

-2,555,000

-12,130,000

-22,403,000

-7,504,000

-3,061,000

-2,702,000

-2,845,000

-2,923,000

-7,881,000

-8,834,000

-24,049,000

-5,412,000

-1,062,000

-1,145,000

-2,534,000

-3,358,000

-3,830,000

-9,098,000

-7,952,000

-8,836,000

-14,213,000

-3,151,000

-995,000

-2,554,000

-4,487,000

-12,831,000

-3,150,000

-2,268,000

-4,937,000

[3]

Total Cost Net of Accumulated Depreciation

5,391,209,000

4,946,305,000

16,896,000

41,020,000

4,899,000

16,497,000

22,956,000

6,401,000

6,994,000

10,572,000

8,718,000

18,006,000

12,094,000

10,679,000

82,605,000

4,447,000

48,856,000

3,581,000

6,548,000

8,457,000

123,606,000

2,632,000

33,526,000

4,095,000

8,055,000

23,668,000

20,133,000

13,091,000

10,031,000

[1]

9,206,000

58,949,000

33,738,000

49,582,000

18,054,000

18,020,000

13,053,000

65,867,000

19,845,000

15,403,000

23,487,000

77,518,000

56,406,000

13,964,000

14,411,000

5,154,000

4,189,000

15,034,000

23,250,000

47,173,000

8,009,000

15,568,000

41,602,000

11,008,000

23,594,000

41,351,000

20,860,000

23,752,000

195,741,000

17,888,000

79,413,000

21,782,000

7,052,000

14,429,000

14,339,000

4,724,000

5,671,000

6,019,000

15,328,000

19,499,000

72,884,000

14,824,000

14,121,000

30,018,000

14,234,000

35,258,000

18,216,000

36,620,000

37,420,000

6,802,000

27,576,000

11,165,000

11,553,000

8,804,000

293,520,000

[1]

16,916,000

7,801,000

113,378,000

18,565,000

46,617,000

16,636,000

11,720,000

52,663,000

19,362,000

31,308,000

106,032,000

[1]

18,721,000

143,542,000

172,211,000

3,922,000

9,366,000

140,402,000

15,639,000

2,797,000

35,270,000

16,871,000

12,939,000

10,606,000

11,915,000

8,778,000

25,242,000

6,573,000

86,444,000

53,951,000

12,585,000

25,590,000

34,436,000

52,918,000

26,255,000

60,298,000

19,576,000

36,076,000

91,104,000

43,684,000

82,468,000

18,916,000

73,329,000

27,371,000

67,109,000

52,421,000

14,658,000

14,549,000

13,295,000

6,854,000

3,363,000

14,759,000

50,677,000

20,711,000

16,931,000

36,202,000

8,534,000

21,173,000

12,154,000

3,238,000

11,003,000

13,289,000

32,839,000

36,659,000

41,283,000

5,432,000

40,448,000

12,256,000

17,864,000

16,314,000

16,359,000

37,716,000

2,505,000

16,565,000

1,984,000

60,713,000

33,645,000

428,342,000

26,405,000

3,843,000

14,979,000

9,023,000

9,726,000

2,670,000

4,070,000

5,769,000

2,336,000

4,273,000

6,072,000

2,935,000

1,880,000

4,088,000

8,307,000

6,680,000

2,808,000

5,082,000

12,625,000

16,380,000

6,521,000

9,962,000

13,804,000

2,205,000

5,119,000

5,991,000

11,881,000

4,278,000

628,000

1,299,000

5,053,000

24,738,000

9,816,000

4,372,000

2,296,000

6,223,000

8,967,000

9,982,000

11,537,000

15,754,000

2,560,000

419,000

1,383,000

3,168,000

3,625,000

3,879,000

5,501,000

13,529,000

13,992,000

32,223,000

5,087,000

918,000

5,922,000

7,452,000

5,734,000

2,980,000

5,766,000

3,827,000

16,562,000

[3]

Encumbrances

4,337,785,000

3,941,913,000

25,955,000

19,493,000

2,520,000

7,435,000

13,471,000

2,963,000

2,972,000

5,483,000

5,125,000

9,362,000

12,000,000

6,155,000

27,704,000

2,472,000

19,337,000

2,055,000

2,512,000

3,780,000

113,022,000

1,456,000

19,679,000

2,396,000

4,097,000

9,601,000

18,154,000

9,398,000

9,271,000

[1]

11,601,000

45,252,000

30,740,000

33,252,000

5,963,000

16,948,000

8,771,000

55,083,000

10,194,000

10,033,000

42,239,000

46,590,000

50,629,000

10,091,000

8,820,000

7,479,000

12,910,000

8,500,000

17,238,000

56,368,000

16,156,000

23,048,000

27,843,000

12,424,000

23,694,000

41,472,000

20,628,000

16,027,000

112,970,000

8,644,000

246,181,000

9,692,000

3,246,000

15,695,000

9,377,000

7,236,000

7,468,000

8,781,000

29,073,000

10,864,000

70,250,000

17,073,000

4,807,000

15,350,000

64,358,000

14,028,000

31,184,000

61,169,000

10,287,000

27,808,000

14,459,000

29,452,000

13,332,000

134,869,000

[1]

21,201,000

7,687,000

90,240,000

31,143,000

1,904,000

22,643,000

18,514,000

33,438,000

14,583,000

58,108,000

[1]

12,135,000

117,943,000

122,992,000

6,026,000

6,185,000

10,180,000

8,642,000

18,345,000

8,155,000

15,276,000

12,066,000

12,654,000

9,117,000

22,637,000

5,683,000

39,795,000

33,314,000

22,352,000

30,374,000

23,169,000

33,049,000

15,272,000

117,689,000

17,230,000

35,878,000

39,468,000

33,393,000

58,306,000

20,647,000

31,570,000

24,985,000

46,867,000

64,844,000

17,884,000

8,329,000

13,406,000

9,906,000

4,053,000

72,940,000

17,596,000

25,955,000

15,443,000

32,241,000

5,610,000

11,617,000

18,552,000

45,689,000

23,480,000

11,201,000

38,596,000

3,983,000

12,664,000

11,036,000

18,715,000

42,602,000

18,580,000

49,106,000

31,516,000

395,872,000

23,289,000

4,000,000

11,993,000

6,995,000

10,401,000

4,051,000

1,892,000

4,526,000

5,321,000

5,490,000

6,095,000

2,803,000

1,944,000

1,007,000

13,099,000

9,100,000

3,096,000

3,493,000

16,000,000

18,053,000

5,155,000

9,891,000

11,035,000

2,067,000

6,946,000

17,943,000

1,995,000

99,000

100,000

8,918,000

18,797,000

7,475,000

3,048,000

2,433,000

3,565,000

4,592,000

4,540,000

11,998,000

19,371,000

2,867,000

420,000

1,852,000

2,794,000

3,878,000

4,201,000

6,517,000

7,126,000

17,494,000

24,714,000

4,984,000

1,480,000

6,823,000

5,445,000

3,630,000

2,114,000

3,515,000

3,402,000

[3]

Real Estate and Accumulated Depreciation (Textual) [Abstract]

Aggregate cost of land and depreciable property for federal income tax purposes

$3,700,000,000

[1]

The current carrying value of the apartment community reflects an impairment loss recognized during the current period or prior periods.

[2]

Date we acquired the apartment community or first consolidated the partnership which owns the apartment community.

[3]

Other includes land parcels, commercial properties and other related costs. We exclude such properties from our residential apartment home counts

[4]

For 2008 and prior periods, costs to acquire the noncontrolling interestâ€™s share of our consolidated real estate partnerships were capitalized as part of the initial cost.

[5]

Costs capitalized subsequent to consolidation includes costs capitalized since acquisition or first consolidation of the partnership/apartment community.

[6]

The aggregate cost of land and depreciable property for federal income tax purposes was approximately $3.7 billion at December 31, 2013.

Real_Estate_and_Accumulated_De2

Real Estate and Accumulated Depreciation (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Real Estate	'		'		'
Balance at beginning of year	$8,333,419,000		$8,917,137,000		$9,468,165,000
Additions during the year:	'		'		'
Acquisitions	66,058,000		131,374,000		44,681,000
Capital additions	376,038,000		272,103,000		207,263,000
Deductions during the year:	'		'		'
Casualty and other write-offs	-98,489,000	[1]	-62,589,000	[1]	-192,542,000	[1]
Reclassification of real estate included in sale of asset management business	0		-160,420,000		0
Sales	-462,945,000		-764,186,000		-610,430,000
Balance at end of year	8,214,081,000		8,333,419,000		8,917,137,000
Accumulated Depreciation	'		'		'
Balance at beginning of year	2,820,765,000		2,872,190,000		2,934,912,000
Additions during the year	'		'		'
Depreciation	288,666,000		353,414,000		382,213,000
Deductions during the year:	'		'		'
Casualty and other write-offs	-92,775,000	[1]	-46,869,000	[1]	-173,941,000	[1]
Reclassification of real estate included in sale of asset management business	0		-33,394,000		0
Sales	-193,784,000		-324,576,000		-270,994,000
Balance at end of year	2,822,872,000		2,820,765,000		2,872,190,000
Write-off of fully depreciated assets	$91,900,000		$38,700,000		$165,900,000

[1]	Includes the write-off of fully depreciated assets totaling $91.9 million, $38.7 million and $165.9 million, during the years ended December 31, 2013, 201