ACQUISITION OF REAL ESTATE PROPERTY - 2020 Acquisitions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) property
Business Acquisition [Line Items]
Number of real estate properties	1,300
Payments to acquire real estate | $	$ 446,628	$ 1,369,052	$ 78,648
2020 Acquisitions
Business Acquisition [Line Items]
Payments to acquire real estate | $			$ 249,500
Office operations
Business Acquisition [Line Items]
Number of real estate properties	376
Office operations | Research and Innovation Center
Business Acquisition [Line Items]
Number of real estate properties acquired			2
SHOP | 2020 Acquisitions
Business Acquisition [Line Items]
Number of real estate properties			7
Triple-net leased properties | LTAC | 2020 Acquisitions
Business Acquisition [Line Items]
Number of real estate properties			1