Real Estate Investments - Types of property Development and Improvement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Real estate investments
Invested in projects	$ 1,214
Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		$ 4,854
Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects	1,044	1,119
ALF | Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		2,386
ALF | Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects	$ 1,044	1,116
SNF | Developments | Development and Improvement Commitments
Real estate investments
Invested in projects		2,468
SNF | Improvements | Development and Improvement Commitments
Real estate investments
Invested in projects		$ 3