Commitments and Contingencies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) obligation property	Apr. 29, 2021 term	Dec. 31, 2020 USD ($)	[1]
Other Commitments [Line Items]
Number of outstanding credit obligations | obligation	12
Letter of credit obligation	$ 22,404
Outstanding construction financings for leased properties	458,844		$ 487,742
Additional financing to complete construction	819,168
Total loans made	270,164
Expected additional funding for investments	20,209
Capital Improvements
Other Commitments [Line Items]
Total contingent purchase obligations	58,673
Definitive Agreement To Acquire Property
Other Commitments [Line Items]
Total contingent purchase obligations	$ 1,576,800
Number of properties | property	86
Triple-net
Other Commitments [Line Items]
Number of properties | term		51

[1] Note: The consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.