Dispositions of Real Estate and Discontinued Operations - Assets and Liabilities for Discontinued Operations (Details) $ in Thousands	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) property	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
ASSETS
Cash and cash equivalents	$ 0	$ 7,707	$ 53,085	$ 63,834
Total assets of discontinued operations, net	49,866	37,190
LIABILITIES
Total liabilities of discontinued operations, net	4,070	15,056
Allowance for doubtful accounts receivable	0	4,138
Held-for-sale
ASSETS
Accounts receivable, net of allowance of $0 and $4,138	0	2,446
Cash and cash equivalents	0	7,707
Right-of-use asset, net	0	26
Other assets, net	0	3,237
Total assets of discontinued operations, net	0	13,416
Assets held for sale, net	49,866	23,774
Assets held for sale and discontinued operations, net	49,866	37,190
LIABILITIES
Lease liability	0	26
Accounts payable, accrued liabilities, and other liabilities	0	14,843
Deferred revenue	0	92
Total liabilities of discontinued operations, net	0	14,961
Liabilities related to assets held for sale, net	4,070	95
Liabilities related to assets held for sale and discontinued operations, net	4,070	15,056
Net real estate assets	$ 44,000	$ 23,000
Held-for-sale | Medical Office
LIABILITIES
Number of properties classified as held for sale | property		4
Held-for-sale | Life Science
LIABILITIES
Number of properties classified as held for sale | property	2	1