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Loans Receivable - Summary of Real Estate Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Carrying Value	$ 1,407,852
Allowance for credit losses on real estate loans receivable	(165,693)	$ (166,785)	$ (224,146)	$ (224,036)
Real estate loans receivable, net of credit allowance	1,003,136	1,068,681
Non-real estate loans	390,559	375,060
Allowance for credit losses on non-real estate loans receivable	(151,536)	(151,433)
Non-real estate loans receivable, net of credit allowance	239,023	223,627
Total loans receivable, net of credit allowance	1,242,159	1,292,308
Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Carrying Value	833,070	889,556
Other real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Carrying Value	184,223	194,477
Allowance for credit losses on real estate loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on real estate loans receivable	$ (14,157)	$ (15,352)