Financial Instruments and Fair Value Measurements - Schedule of Items Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Derivatives, Fair Value [Line Items]
Impairment charges	$ 9,925
Acadia Realty Trust
Derivatives, Fair Value [Line Items]
Impairment charges	$ 2,294
27 E. 61st Street Manhattan, NY | Fund IV | Level 3 Inputs Projections
Derivatives, Fair Value [Line Items]
Triggering Event	Reduced projected operating income
Impairment charges	$ 6,909
27 E. 61st Street Manhattan, NY | Fund IV | Acadia Realty Trust | Level 3 Inputs Projections
Derivatives, Fair Value [Line Items]
Impairment charges	$ 1,597
210 Bowery Residential Units | Fund IV | Level 3 Inputs Projections
Derivatives, Fair Value [Line Items]
Triggering Event	Reduced projected operating income
Impairment charges	$ 3,016
210 Bowery Residential Units | Fund IV | Acadia Realty Trust | Level 3 Inputs Projections
Derivatives, Fair Value [Line Items]
Impairment charges	$ 697