Schedule III: Real Estate and Accumulated Depreciation - Summary Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Additions during the year:
Total portfolio balance at end of year	$ 1,081,779
Accumulated depreciation balance at end of year	517,022
Aimco Real Estate
Total portfolio
Total portfolio balance at beginning of year	1,500,269	$ 1,385,412	$ 1,053,589
Additions during the year:
Acquisitions	69,178	112,820	302,213
Capital additions	222,052	24,334	37,327
Write-offs of fully depreciated assets and other		(22,297)	(7,717)
Total portfolio balance at end of year	1,791,499	1,500,269	1,385,412
Accumulated depreciation balance at beginning of year	495,010	449,444	398,300
Depreciation	66,105	67,919	58,436
Write-offs of fully depreciated assets and other		(22,353)	(7,292)
Accumulated depreciation balance at end of year	$ 561,115	$ 495,010	$ 449,444