Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Schedule of Identified Intangible Assets and Intangible Liabilities

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of June 30, 2024 and December 31, 2023 (in thousands):

	June 30, 2024		December 31, 2023
Identified intangible assets (included in other assets):
Gross amount	$	273,010	$	189,680
Accumulated amortization	(189,425)		(184,902)
Net	$	83,585	$	4,778
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	226,034	$	205,394
Accumulated amortization	(202,819)		(202,089)
Net	$	23,215	$	3,305

Schedule of Marketable Securities

As of June 30, 2024 and December 31, 2023, we held the following marketable securities (in thousands):

	June 30, 2024		December 31, 2023
Commercial mortgage-backed securities	$	16,593	$	9,591
Total investment in marketable securities	$	16,593	$	9,591

Schedule of Properties Contributed of Annualized Cash Rent

For the three months ended June 30, 2024, the following properties contributed more than 5.0% of our annualized cash rent from office properties, including our share of annualized cash rent from joint venture office properties:

Property	Three months ended June 30, 2024
One Vanderbilt Avenue	17.2%
11 Madison Avenue	8.7%
420 Lexington Ave	7.0%
1515 Broadway	6.7%
245 Park Avenue	5.9%
1185 Avenue of the Americas	5.9%