Real Estate Investments - Types of property Development and Improvement (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Real estate investments
Invested in projects	$ 4,781
Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		$ 13,384
Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects	4,839	3,955
ALF | Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		4,491
ALF | Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects	4,560	3,941
SNF | Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		8,893
SNF | Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects	$ 279	$ 14