SSEGMENT REPORTING - Schedule Of Selected Results Of Operations And Asset Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Total revenues $ 79,826 $ 79,687 $ 177,459 $ 154,220  
Total operating and interest expenses 67,580 74,587 139,118 140,517  
Equity in earnings (loss) of unconsolidated joint ventures 2,638 349 2,151 (1,107)  
Net operating income (loss) 14,884 5,449 40,492 12,596  
Total assets 4,310,997   4,310,997   $ 4,527,318
Total long-lived assets 3,918,168   3,918,168   4,184,381
Total investments in unconsolidated joint ventures 132,790   132,790   137,772
Corporate & Other          
Segment Reporting Information [Line Items]          
Total revenues (442) (478) (944) (957)  
Total operating and interest expenses 27,714 27,732 57,333 52,182  
Equity in earnings (loss) of unconsolidated joint ventures 0 0 0 0  
Net operating income (loss) (28,156) (28,210) (58,277) (53,139)  
Total assets 13,239   13,239   16,375
Total long-lived assets (1,602)   (1,602)   (1,309)
Total investments in unconsolidated joint ventures 0   0   0
Commercial & Other Real Estate | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenues 27,392 39,886 79,010 77,581  
Total operating and interest expenses 13,645 15,946 30,777 35,270  
Equity in earnings (loss) of unconsolidated joint ventures 0 (14) 0 (133)  
Net operating income (loss) 13,747 23,926 48,233 42,178  
Total assets 952,889   952,889   1,216,717
Total long-lived assets 881,373   881,373   1,087,198
Total investments in unconsolidated joint ventures 0   0   0
Multiple-Family Real Estate & Services | Operating Segments          
Segment Reporting Information [Line Items]          
Total revenues 52,876 40,279 99,393 77,596  
Total operating and interest expenses 26,221 30,909 51,008 53,065  
Equity in earnings (loss) of unconsolidated joint ventures 2,638 363 2,151 (974)  
Net operating income (loss) 29,293 $ 9,733 50,536 $ 23,557  
Total assets 3,344,869   3,344,869   3,294,226
Total long-lived assets 3,038,397   3,038,397   3,098,492
Total investments in unconsolidated joint ventures $ 132,790   $ 132,790   $ 137,772