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, 2020		$ 1,308,093	$ 2,000	$ 1,304,851	$ 63,185	$ 1,370,036	$ (61,943)
Increase (Decrease) in Partners' Capital [Roll Forward]
Proceeds from the issuance of Common Stock	$ 342,470	342,470		342,470		342,470
Issuance of stock, value	342,470	129	129			129
Issuance costs		(486)		(486)		(486)
Issuance of common partnership units		121,557			121,557	121,557
Issuance of AIR Operating Partnership units	121,557
Redemption of common partnership units		(17,827)			(17,827)	(17,827)
Conversion of common partnership units		0		8,333	(8,333)
Amortization of share-based compensation cost		7,655		3,771	3,884	7,655
Effect of changes in ownership of consolidated entities	0			(21,312)	21,312
Contributions from noncontrolling interests in consolidated real estate partnerships	7,458	7,458					7,458
Change in accumulated other comprehensive income	(3,251)	(3,251)		(3,039)	(212)	(3,251)
Net income (loss)	472,811	472,811		447,621	28,433	476,054	(3,243)
Distributions to common unitholders		(269,385)		(269,385)		(269,385)	0
Distributions to preferred unitholders		(179)		(179)		(179)
Distributions to noncontrolling interests	(28,129)	(28,129)			(15,216)	(15,216)	(12,913)
Other, net		(1,761)		(1,749)	230	(1,519)	(242)
Ending 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]
Proceeds from the issuance of Common Stock	0	0
Redemption of common partnership units		(11,174)			(11,174)	(11,174)
Repurchase of common partnership units		(316,710)		(316,710)		(316,710)
Conversion of common partnership units		0		119	(119)
Amortization of share-based compensation cost		7,966		4,270	3,696	7,966
Effect of changes in ownership of consolidated entities		0		(7,791)	7,791
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	9,206	9,206					9,206
Change in accumulated other comprehensive income	47,322	47,322		43,562	3,760	47,322
Net income (loss)	963,662	963,662		904,432	58,772	963,204	458
Distributions to common unitholders		(295,460)		(277,639)	(17,821)	(295,460)
Distributions to noncontrolling interests	(35,444)	(17,623)					(17,623)
Other, net		(1,629)	(129)	(1,193)	(244)	(1,566)	(63)
Ending 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]
Proceeds from the issuance of Common Stock	0	0
Issuance of AIR Operating Partnership units	22,383	22,383			22,383	22,383
Redemption of common partnership units		(18,507)			(18,507)	(18,507)
Repurchase of common partnership units		(148,956)		(148,956)		(148,956)
Amortization of share-based compensation cost		9,296		4,488	4,808	9,296
Effect of changes in ownership of consolidated entities	1,113			(8,260)	10,771	2,511	(1,398)
Purchase of noncontrolling interests in consolidated real estate partnerships		(1,517)		479		479	(1,996)
Contributions from noncontrolling interests in consolidated real estate partnerships	5,691	5,691					5,691
Change in accumulated other comprehensive income	(22,868)	(22,868)		(21,170)	(1,698)	(22,868)
Net income (loss)	683,007	683,007		635,101	42,721	677,822	5,185
Distributions to common unitholders		(284,126)		(266,422)	(17,704)	(284,126)
Distributions to noncontrolling interests	(32,080)	(14,376)					(14,376)
Other, net		$ (72)		219	3	222	(294)
Ending balance at Dec. 31, 2023	$ 2,550,374		$ 2,000	$ 2,349,896	$ 284,451	$ 2,636,347	$ (85,973)