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Segment Reporting - Assets (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment reporting
Total assets	$ 7,179,852				$ 7,179,852		$ 6,476,424
Net income (loss)	(32,645)	$ (66,183)	$ (24,742)	$ 11,143	(98,828)	$ (13,599)
Operating Segments | Office Portfolio
Segment reporting
Total assets	2,997,668				2,997,668		3,092,289
Net income (loss)	53,754		25,670		77,785	49,837
Operating Segments | SHOP
Segment reporting
Total assets	2,949,629				2,949,629		2,912,570
Net income (loss)	(6,679)		(24,710)		(32,093)	(15,242)
Non-Segment
Segment reporting
Total assets	1,232,555				1,232,555		$ 471,565
Net income (loss)	$ (79,720)		$ (25,702)		$ (144,520)	$ (48,194)

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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