Segment Reporting - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Segment reporting
Total assets	$ 5,666,730	$ 6,002,093
Operating Segments | Office Portfolio
Segment reporting
Total assets	1,954,075	1,967,244
Operating Segments | SHOP
Segment reporting
Total assets	3,153,704	3,147,785
Non-Segment
Segment reporting
Total assets	$ 558,951	$ 887,064