Debt (Narrative) (Details) - USD ($) $ in Thousands	Jun. 29, 2023	Jun. 30, 2023	Jan. 09, 2023
SOFR
Debt Instrument
Rate (as percent)		1.00%
SOFR | 1290 Avenue of the Americas mortgage loan | Interest Rate Cap | Designated as Hedging Instrument
Debt Instrument
Cap strike rate (as percent)		1.00%
SOFR | 1290 Avenue of Americas mortgage loan Expiring November 2025 | Interest Rate Cap | Designated as Hedging Instrument
Debt Instrument
Cap strike rate (as percent)		3.89%
1290 Avenue of the Americas
Debt Instrument
Debt instrument, amount	$ 950,000
Cap term (years)	2 years
Controlling interest, percentage owned (in percent)	70.00%
Payment of premium connection with the purchase of cap arrangement	$ 63,100
1290 Avenue of the Americas | SOFR
Debt Instrument
Rate (as percent)	1.00%
Derivative, basis spread on variable rate (as percent)	1.62%
1290 Avenue of the Americas | SOFR | 1290 Avenue of Americas mortgage loan Expiring November 2025 | Interest Rate Cap | Designated as Hedging Instrument
Debt Instrument
Cap strike rate (as percent)		3.89%
Participating Mortgages | One Five Zero West 34th Street Loan
Debt Instrument
Mortgage loan			$ 105,000
Debt instrument, amount			205,000
Participation interest			105,000
Remaining mortgage loan			$ 100,000
Participating Mortgages | One Five Zero West 34th Street Loan | SOFR
Debt Instrument
Rate (as percent)			1.86%
Participating Mortgages | One Five Zero West 34th Street Loan | SOFR | Maximum
Debt Instrument
Rate (as percent)			4.10%