220 Central Park South (220 CPS)	3 Months Ended
	Mar. 31, 2022
Real Estate [Abstract]
220 Central Park South (220 CPS)	220 Central Park South ("220 CPS")During the three months ended March 31, 2022, we closed on the sale of one condominium unit at 220 CPS for net proceeds of $15,095,000 resulting in a financial statement net gain of $6,001,000 which is included in "net gains on disposition of wholly owned and partially owned assets" on our consolidated statements of income. In connection with this sale, $589,000 of income tax expense was recognized on our consolidated statements of income. From inception to March 31, 2022, we have closed on the sale of 107 units for net proceeds of $3,021,991,000 resulting in financial statement net gains of $1,123,256,000.