Condensed Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	Apartment Income REIT, L.P. [Member]	Apartment Income REIT, L.P. [Member] Preferred Units [Member]	Apartment Income REIT, L.P. [Member] General Partner and Special Limited Partner [Member]	Apartment Income REIT, L.P. [Member] Limited Partners [Member]	Apartment Income REIT, L.P. [Member] Partners Capital Attributable To The Partnership [Member]	Apartment Income REIT, L.P. [Member] Noncontrolling Interest in Consolidated Real Estate Partnerships
Balances at Dec. 31, 2020		$ 1,308,093	$ 2,000	$ 1,304,851	$ 63,185	$ 1,370,036	$ (61,943)
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common partnership units to AIR, net		342,469		342,469		342,469
Issuance costs		(337)		(337)		(337)
Conversion of common partnership units	$ (2)			8,240	(8,242)	(2)
Redemption of common partnership units		(3,975)			(3,975)	(3,975)
Amortization of share-based compensation cost		5,928		2,953	2,975	5,928
Effect of changes in ownership of consolidated entities				(9,846)	10,076
Contribution from noncontrolling interest in consolidated real estate partnerships	6,126	6,126					6,126
Change in accumulated other comprehensive income (loss)	(3,251)	(3,251)		(3,039)	(212)	(3,251)
Net income (loss)	75,289	75,289		74,740	3,966	78,706	(3,417)
Distributions to common unitholders		(211,011)		(200,327)	(10,684)	(211,011)
Distributions to preferred unitholders		(136)		136		(136)
Distributions to noncontrolling interests	(19,428)	(8,744)					(8,744)
Other, net		(1,744)		(1,624)		(1,624)	(120)
Balances at Sep. 30, 2021		1,508,935	2,000	1,517,944	57,089	1,577,033	(68,098)
Balances at Jun. 30, 2021		1,571,756	2,000	1,576,899	60,388	1,639,287	(67,531)
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance costs		(31)		(31)		(31)
Conversion of common partnership units				6,283	(6,283)
Redemption of common partnership units		(425)			(425)	(425)
Amortization of share-based compensation cost		1,401		409	992	1,401
Effect of changes in ownership of consolidated entities		230		(5,423)	5,653	230
Contribution from noncontrolling interest in consolidated real estate partnerships	4,128	4,128					4,128
Net income (loss)	9,068	9,068		9,378	475	9,853	(785)
Distributions to common unitholders		(72,532)		(69,051)	(3,481)	(72,532)
Distributions to preferred unitholders		(43)		(43)		(43)
Distributions to noncontrolling interests	(7,391)	(3,910)					(3,910)
Other, net		(707)		(477)	(230)	(707)
Balances at Sep. 30, 2021		1,508,935	2,000	1,517,944	57,089	1,577,033	(68,098)
Balances at Dec. 31, 2021		1,939,155	2,129	1,810,896	197,013	2,010,038	(70,883)
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchases of common partnership units		(171,711)		(171,711)		(171,711)
Redemption of common partnership units		7,423			7,423	7,423
Amortization of share-based compensation cost		6,272		3,519	2,753	6,272
Purchase of noncontrolling interests in consolidated real estate partnerships	(5,409)	(5,409)		(5,529)		(5,529)	120
Effect of changes in ownership of consolidated entities				(5,404)	5,404
Contribution from noncontrolling interest in consolidated real estate partnerships	8,337	8,337					8,337
Change in accumulated other comprehensive income (loss)	49,861	49,861		45,948	3,913	49,861
Net income (loss)	611,632	611,632		574,864	37,053	611,917	(285)
Distributions to common unitholders		(223,769)		(210,361)	13,408	(223,769)
Distributions to noncontrolling interests	(26,969)	(13,561)					(13,561)
Other, net		(1,342)	(129)	(1,042)	(243)	(1,414)	72
Balances at Sep. 30, 2022		2,192,042	2,000	2,041,180	225,062	2,268,242	(76,200)
Balances at Jun. 30, 2022		2,288,825	2,000	2,130,449	226,985	2,359,434	(70,609)
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchases of common partnership units		(46,711)		(46,711)		(46,711)
Redemption of common partnership units		(3,178)			(3,178)	(3,178)
Amortization of share-based compensation cost		1,821		878	943	1,821
Purchase of noncontrolling interests in consolidated real estate partnerships	(5,409)	(5,409)		(5,529)		(5,529)	120
Effect of changes in ownership of consolidated entities				(2,140)	2,140
Contribution from noncontrolling interest in consolidated real estate partnerships	529	529					529
Change in accumulated other comprehensive income (loss)	34,940	34,940		32,198	2,742	34,940
Net income (loss)	1,794	1,794		1,759	137	1,896	(102)
Distributions to common unitholders		(73,849)		(69,377)	4,472	(73,849)
Distributions to noncontrolling interests	$ (10,698)	(6,226)					(6,226)
Other, net		(494)		(347)	(235)	(582)	88
Balances at Sep. 30, 2022		$ 2,192,042	$ 2,000	$ 2,041,180	$ 225,062	$ 2,268,242	$ (76,200)