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Earnings and Dividends per Share and Unit (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Schedule of Earnings Per Share and Dividends Per Share [Line Items]          
Number of shares potentially redeemable for (in shares)   1.9   1.9  
Dividends paid (in dollars per share)   $ 0.39 $ 0.38 $ 2.80 $ 1.14
Distributions paid (in dollars per share)   $ 0.39 $ 0.38 $ 2.80 $ 1.14
Special dividend   $ 58,065 $ 59,793 $ 183,579 $ 179,351
Special Dividend and Special Distribution [Member]          
Schedule of Earnings Per Share and Dividends Per Share [Line Items]          
Dividends paid (in dollars per share) $ 2.02        
Special Dividend Paid [Member]          
Schedule of Earnings Per Share and Dividends Per Share [Line Items]          
Special dividend $ 67,100        
Common shares issued in special dividend (in shares) 4.5        
Special dividend, cash paid in lieu of fractional shares $ 400        
Special Cash Distribution [Member] | AIMCO Properties, LP [Member] | General Partner and Special Limited Partner [Member]          
Schedule of Earnings Per Share and Dividends Per Share [Line Items]          
Special distribution   $ 72,700      
Units issued in special dividend (in shares)   4.8      
Special distribution, cash paid in lieu of fractional shares   $ 400