Acquisitions, Dispositions and Mortgage Repayments - Subsequent Acquisitions (Details) $ in Thousands	Feb. 11, 2022 USD ($) ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($) ft²
Business Acquisition [Line Items]
SQUARE FOOTAGE unaudited | ft²		514,253	325,396
PURCHASE PRICE | $		$ 180,487	$ 125,900
Medical Office Building | Dallas, TX | Subsequent Event
Business Acquisition [Line Items]
SQUARE FOOTAGE unaudited | ft²	18,000
PURCHASE PRICE | $	$ 8,200