Segment Disclosures - Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Disclosure
Total revenues	$ 455,276	$ 381,054
Operating segment
Segment Disclosure
Total revenues	455,276	381,054
Operating segment | Life science
Segment Disclosure
Total revenues	169,934	128,883
Operating segment | Medical office
Segment Disclosure
Total revenues	160,201	156,641
Operating segment | CCRC
Segment Disclosure
Total revenues	116,128	91,780
Operating segment | Other non-reportable
Segment Disclosure
Total revenues	$ 9,013	$ 3,750