Segment Disclosures - Revenues and Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Segment Disclosure
Total assets	$ 15,771,229	$ 15,257,519
Assets held for sale and discontinued operations, net	49,866	37,190
Operating segment
Segment Disclosure
Gross assets	17,588,155	16,643,879
Accumulated depreciation and amortization	(3,540,362)	(3,125,416)
Total assets	14,047,793	13,518,463
Operating segment | Life Science
Segment Disclosure
Gross assets	9,019,271	8,257,990
Operating segment | Medical Office
Segment Disclosure
Gross assets	6,291,986	6,152,512
Operating segment | CCRC
Segment Disclosure
Gross assets	2,276,898	2,233,377
Operating segment | Other Non-reportable
Segment Disclosure
Total assets	744,550	794,172
Other non-segment
Segment Disclosure
Total assets	$ 929,020	$ 907,694