Debt (Summary of Debt) (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Debt Instrument
Deferred financing costs, net and other	$ (63,572,000)	$ (58,268,000)
Mortgages payable, net	5,829,018,000	6,053,343,000
Unsecured revolving credit facilities	575,000,000	575,000,000
Long term debt	2,560,025,000	2,562,604,000
Interest Rate Cap \| One Park Avenue mortgage loan \| Designated as Hedging Instrument
Debt Instrument
Derivative asset, notional amount	$ 525,000,000
Interest Rate Cap \| One Park Avenue mortgage loan \| Designated as Hedging Instrument \| Secured Overnight Financing Rate (SOFR)
Debt Instrument
Cap strike rate	4.39%
Interest Rate Cap \| One Park Avenue Mortgage Loan Expiring March 2024 \| Designated as Hedging Instrument \| Secured Overnight Financing Rate (SOFR)
Debt Instrument
Cap strike rate	3.89%
Mortgages Payable
Debt Instrument
Interest rate, end of period (in percentage)	4.43%
Debt, carrying amount	$ 5,877,615,000	6,099,215,000
Deferred financing costs, net and other	(48,597,000)	(45,872,000)
Mortgages payable, net	$ 5,829,018,000	6,053,343,000
Mortgages Payable \| Fixed rate
Debt Instrument
Interest rate, end of period (in percentage)	3.63%
Debt, carrying amount	$ 3,570,000,000	2,190,000,000
Mortgages Payable \| Variable Rate
Debt Instrument
Interest rate, end of period (in percentage)	5.67%
Debt, carrying amount	$ 2,307,615,000	3,909,215,000
Mortgages Payable \| Variable Rate \| Interest Rate Cap
Debt Instrument
Notional Amount	$ 1,649,120
Cap strike rate	4.14%
Weighted average remaining term	9 months
Senior unsecured notes
Debt Instrument
Interest rate, end of period (in percentage)	3.02%
Debt, carrying amount	$ 1,200,000,000	1,200,000,000
Deferred financing costs, net and other	(8,168,000)	(10,208,000)
Long term debt	$ 1,191,832,000	1,189,792,000
Unsecured Debt
Debt Instrument
Interest rate, end of period (in percentage)	4.05%
Debt, carrying amount	$ 800,000,000	800,000,000
Deferred financing costs, net and other	(6,807,000)	(2,188,000)
Long term debt	$ 793,193,000	797,812,000
Unsecured revolving credit facilities
Debt Instrument
Interest rate, end of period (in percentage)	3.88%
Unsecured revolving credit facilities	$ 575,000,000	$ 575,000,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Nominal or face amount used to calculate payments on the derivative asset.

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- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

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No definition available.

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Nominal or face amount used to calculate payment on derivative.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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