220 Central Park South (220 CPS) (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		48 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) unit	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) unit
Real Estate [Line Items]
Income tax expense (benefit)	$ 3,711	$ (25,376)	$ 14,686	$ (20,551)
220 Central Park South
Real Estate [Line Items]
Number of condominium units sold (unit) | unit			1		107
Cash proceeds from the sale of real estate			$ 16,124		$ 3,023,020
Net gain on sale of real estate			7,030		$ 1,124,285
Income tax expense (benefit)			$ 945