Segment Reporting (Reconciliation of Segment Activity to Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Investments in real estate, net:
Investments in real estate:	$ 2,011,111	$ 2,049,927
Cash and cash equivalents	66,424	59,738	$ 74,068
Restricted cash	26,423	25,644	$ 18,034
Derivative assets, at fair value	13,321	174
Straight-line rent receivable, net	24,252	23,858
Operating lease right-of-use assets	7,889	7,914
Prepaid expenses and other assets	30,492	32,564
Deferred costs, net	14,139	14,581
Total assets	2,194,051	2,214,400
Medical office buildings
Investments in real estate, net:
Investments in real estate:	1,127,945	1,149,241
Seniors housing - operating properties
Investments in real estate, net:
Investments in real estate:	$ 883,166	$ 900,686