Condensed Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	Apartment Income REIT, L.P.	Apartment Income REIT, L.P. Preferred Units	Apartment Income REIT, L.P. General Partner and Special Limited Partner	Apartment Income REIT, L.P. Limited Partners	Apartment Income REIT, L.P. Partners' Capital Attributable to the AIR Operating Partnership	Apartment Income REIT, L.P. Noncontrolling Interests in Consolidated Real Estate Partnerships
Beginning balance 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]
Redemption of common partnership units		(7,423)			(7,423)	(7,423)
Repurchase of common partnership units		(171,711)		(171,711)		(171,711)
Amortization of share-based compensation cost		6,272		3,519	2,753	6,272
Effect of changes in ownership of consolidated entities	$ 0			(5,404)	5,404
Purchase of noncontrolling interests in consolidated real estate partnerships		(5,409)		(5,529)		(5,529)	120
Contributions from noncontrolling interests in consolidated real estate partnerships	8,337	8,337					8,337
Change in accumulated other comprehensive 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 noncontrolling interests		(223,769)		(210,361)	(13,408)	(223,769)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(26,969)	(13,561)					(13,561)
Other, net		(1,342)	(129)	(1,042)	(243)	(1,414)	72
Ending balance at Sep. 30, 2022		2,192,042	2,000	2,041,180	225,062	2,268,242	(76,200)
Beginning balance 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]
Redemption of common partnership units		(3,178)			(3,178)	(3,178)
Repurchase of common partnership units		(46,711)		(46,711)		(46,711)
Amortization of share-based compensation cost		1,821		878	943	1,821
Effect of changes in ownership of consolidated entities	0			(2,140)	2,140
Contributions from noncontrolling interests in consolidated real estate partnerships	529	529					529
Change in accumulated other comprehensive 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 noncontrolling interests		(73,849)		(69,377)	(4,472)	(73,849)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(10,698)	(6,226)			0	0	(6,226)
Other, net		(494)		(347)	(235)	(582)	88
Ending balance at Sep. 30, 2022		2,192,042	2,000	2,041,180	225,062	2,268,242	(76,200)
Beginning balance at Dec. 31, 2022		2,319,306	2,000	2,154,417	241,674	2,398,091	(78,785)
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of AIR Operating Partnership units	22,383	22,383			22,383	22,383
Redemption of common partnership units		(17,559)			(17,559)	(17,559)
Repurchase of common partnership units		(77,782)		(77,782)	0	(77,782)
Amortization of share-based compensation cost		7,072		3,607	3,465	7,072
Effect of changes in ownership of consolidated entities	1,119			(7,840)	10,356	2,516	(1,397)
Purchase of noncontrolling interests in consolidated real estate partnerships	(3)	(1,517)		479		479	(1,996)
Contributions from noncontrolling interests in consolidated real estate partnerships	5,235	5,235					5,235
Change in accumulated other comprehensive loss	(20,749)	(20,749)		(18,768)	(1,981)	(20,749)
Net income (loss)	696,452	696,452		651,313	41,245	692,558	3,894
Distributions to noncontrolling interests		(213,354)		(200,142)	(13,212)	(213,354)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(23,120)	(9,908)					(9,908)
Other, net		30	0	180	3	183	(153)
Ending balance at Sep. 30, 2023		2,710,728	2,000	2,505,464	286,374	2,793,838	(83,110)
Beginning balance at Jun. 30, 2023		2,168,890	2,000	1,997,465	249,512	2,248,977	(80,087)
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of common partnership units		(1,745)			(1,745)	(1,745)
Repurchase of common partnership units		(77,782)		(77,782)		(77,782)
Amortization of share-based compensation cost		1,971		816	1,155	1,971
Effect of changes in ownership of consolidated entities	1,119			1,446	1,070	2,516	(1,397)
Contributions from noncontrolling interests in consolidated real estate partnerships	718	718					718
Change in accumulated other comprehensive loss	(16,422)	(16,422)		(14,549)	(1,873)	(16,422)
Net income (loss)	708,942	708,942		664,031	42,386	706,417	2,525
Distributions to noncontrolling interests		(70,136)		(66,002)	(4,134)	(70,136)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (8,985)	(4,851)					(4,851)
Other, net		24		39	3	42	(18)
Ending balance at Sep. 30, 2023		$ 2,710,728	$ 2,000	$ 2,505,464	$ 286,374	$ 2,793,838	$ (83,110)