Leases (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($) Property	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Operating Leased Assets [Line Items]
Fixed and in-substance fixed lease income		$ 851,409	$ 797,502	$ 807,603
Variable lease income		287,149	262,619	247,384
Uncollectible straight line rent	[1]	12,510	5,227	(34,673)
Uncollectible amounts billable in lease income	[1]	13,841	23,481	(82,367)
Total lease income		1,187,452	1,113,368	980,166
2023		850,211
2024		768,797
2025		657,870
2026		552,735
2027		440,844
Thereafter		1,579,740
Total		$ 4,850,197
Number of Properties Subject to Ground Leases | Property		19
Last Ground Lease Expiration Date		2101
Last Office Lease Expiration Date		2029
Total fixed operating lease expense		$ 17,921	18,171	18,050
Total variable lease expense		2,202	1,647	1,629
Total lease expense		20,123	19,818	19,679
Operating cash flows for operating leases		14,656	15,165	15,003
2023		14,796
2024		13,881
2025		13,681
2026		13,437
2027		12,239
Thereafter		517,305
Total undiscounted lease liabilities		585,339
Present value discount		(371,617)
Lease liabilities		213,722	215,788
Lessor [Member]
Operating Leased Assets [Line Items]
Above/below market rent and tenant rent inducement amortization, net		22,543	24,539	42,219
Ground Lease [Member]
Operating Leased Assets [Line Items]
Total fixed operating lease expense		13,759	13,862	13,716
Total variable lease expense		1,591	1,032	1,044
2023		10,750
2024		10,799
2025		10,801
2026		10,722
2027		10,722
Thereafter		516,564
Total undiscounted lease liabilities		570,358
Present value discount		(370,486)
Lease liabilities		$ 199,872
Weighted average discount rate		5.20%
Weighted average remaining term (in years)		46 years 9 months 18 days
Office Lease [Member]
Operating Leased Assets [Line Items]
Total fixed operating lease expense		$ 4,162	4,309	4,334
Total variable lease expense		611	$ 615	$ 585
2023		4,046
2024		3,082
2025		2,880
2026		2,715
2027		1,517
Thereafter		741
Total undiscounted lease liabilities		14,981
Present value discount		(1,131)
Lease liabilities		$ 13,850
Weighted average discount rate		3.60%
Weighted average remaining term (in years)		4 years 4 months 24 days

[1] During the years ended December 31, 2022 and 2021, the Company had improved rent collections following lifting of pandemic-related restrictions which resulted in more favorable income than experienced in 2020 during the height of the pandemic.