Leases ASC 842 (Details) $ in Thousands, ft² in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Lessor Disclosure [Abstract]
Rental and other revenues related to operating lease payments	$ 754,900	$ 726,000	$ 723,100
Variable lease payments	57,300	56,000	65,400
Operating leases, scheduled future minimum payments receivable [Abstract]
2022	695,896
2023	669,753
2024	619,033
2025	525,223
2026	461,045
Thereafter	1,967,017
Operating leases, total future minimum payments receivable due	$ 4,937,967
Lessee Disclosure [Abstract]
Rentable square feet subject to ground leases (in square feet) | ft²	2.8
Weighted average remaining term of ground leases (in years)	51 years
Operating lease liability upon initial adoption	$ 35,300
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accounts Payable and Accrued Liabilities
Right of use asset upon initial adoption	$ 29,700
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Prepaid expenses and other assets
Operating lease discount rate (in hundredths)	4.50%
Operating ground lease expense	$ 2,600	2,600	2,500
Operating ground lease payments	2,300	$ 2,200	$ 2,200
Operating ground lease liabilities, scheduled future minimum payments [Abstract]
2022	2,169
2023	2,167
2024	2,123
2025	2,170
2026	2,220
Thereafter	79,307
Operating ground lease liability, total future minimum payments	90,156
Operating lease liability discount	(56,337)
Operating lease liability	$ 33,819
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid expenses and other assets
Finance lease liability	$ 5,300
Finance lease right of use asset	$ 5,300
Finance lease discount rate (in hundredths)	2.60%
Additional right of use asset	$ 3,100