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		342,163		342,163		342,163
Issuance costs		(306)		(306)		(306)
Conversion of common partnership units				1,959	(1,959)
Redemption of common partnership units		(3,550)			(3,550)	(3,550)
Amortization of share-based compensation cost		4,527		2,544	1,983	4,527
Effect of changes in ownership of consolidated entities				(4,423)	4,423
Contribution from noncontrolling interest in consolidated real estate partnerships	$ 1,998	1,998					1,998
Change in accumulated other comprehensive income (loss)	(3,251)	(3,251)		(3,039)	(212)	(3,251)
Net income (loss)	66,221	66,221		65,362	3,491	68,853	(2,632)
Distributions to common unitholders		(138,479)		(131,276)	(7,203)	(138,479)
Distributions to preferred unitholders		(93)				(93)
Distributions to noncontrolling interests	(12,037)	(4,834)		(93)			(4,834)
Other, net		(733)		(843)	230	(613)	(120)
Balances at Jun. 30, 2021		1,571,756	2,000	1,576,899	60,388	1,639,287	(67,531)
Balances at Mar. 31, 2021		1,322,096	2,000	1,320,903	63,812	1,386,715	(64,619)
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of common partnership units to AIR, net		342,163		342,163		342,163
Issuance costs		(306)		(306)		(306)
Conversion of common partnership units				1,959	(1,959)
Redemption of common partnership units		(327)			(327)	(327)
Amortization of share-based compensation cost		1,889		629	1,260	1,889
Effect of changes in ownership of consolidated entities				(1,833)	1,833
Contribution from noncontrolling interest in consolidated real estate partnerships	1,998	1,998					1,998
Change in accumulated other comprehensive income (loss)	(1,180)	(1,180)		(1,100)	(80)	(1,180)
Net income (loss)	(21,290)	(21,290)		(17,948)	(945)	(18,893)	(2,397)
Distributions to common unitholders		(70,854)		(67,418)	(3,436)	(70,854)
Distributions to preferred unitholders		(43)		(43)		(43)
Distributions to noncontrolling interests	(6,868)	(3,432)					(3,432)
Other, net		1,042		(107)	230	123	919
Balances at Jun. 30, 2021		1,571,756	2,000	1,576,899	60,388	1,639,287	(67,531)
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		(125,000)		(125,000)		(125,000)
Redemption of common partnership units		(4,245)			(4,245)	(4,245)
Amortization of share-based compensation cost		4,451		2,641	1,810	4,451
Effect of changes in ownership of consolidated entities				(3,264)	3,264
Contribution from noncontrolling interest in consolidated real estate partnerships	7,808	7,808					7,808
Change in accumulated other comprehensive income (loss)	14,921	14,921		13,750	1,171	14,921
Net income (loss)	609,838	609,838		573,105	36,916	610,021	(183)
Distributions to common unitholders		(140,984)		(140,984)		(140,984)
Distributions to noncontrolling interests	(16,271)	(16,271)			(8,936)	(8,936)	(7,335)
Other, net		(848)	(129)	(695)	(8)	(832)	(16)
Balances at Jun. 30, 2022		2,288,825	2,000	2,130,449	226,985	2,359,434	(70,609)
Balances at Mar. 31, 2022		2,263,838	2,000	2,115,168	216,827	2,333,995	(70,157)
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchases of common partnership units		(125,000)		(125,000)		(125,000)
Redemption of common partnership units		(793)			(793)	(793)
Amortization of share-based compensation cost		1,701		751	950	1,701
Effect of changes in ownership of consolidated entities				(578)	578
Contribution from noncontrolling interest in consolidated real estate partnerships	3,483	3,483					3,483
Change in accumulated other comprehensive income (loss)	15,704	15,704		14,533	1,171	15,704
Net income (loss)	210,057	210,057		196,927	12,749	209,676	381
Distributions to common unitholders		(70,556)		(70,556)		(70,556)
Distributions to noncontrolling interests	$ (8,677)	(8,677)			(4,489)	(4,489)	(4,188)
Other, net		(932)		(796)	(8)	(804)	(128)
Balances at Jun. 30, 2022		$ 2,288,825	$ 2,000	$ 2,130,449	$ 226,985	$ 2,359,434	$ (70,609)