Dispositions, Real Property Held for Sale and Impairment - Summary of Real Property Disposition Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Real estate dispositions:
Total dispositions	$ 20,600	$ 52,661
Gain (loss) on real estate dispositions, net	747	22,934
Net other assets/(liabilities) disposed	311	(2,027)
Proceeds from real estate dispositions	21,658	73,568
Seniors Housing Operating
Real estate dispositions:
Total dispositions	18,572	0
Triple-net
Real estate dispositions:
Total dispositions	$ 2,028	$ 52,661