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Loans Receivable - Summary of Net Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on real estate loans receivable	$ (166,785)	$ (224,036)	$ (68,372)	$ (68,372)
Real estate loans receivable, net of credit allowance	1,068,681	443,372
Non-real estate loans	375,060	455,508
Allowance for credit losses on non-real estate loans receivable	(151,433)	(215,239)
Non-real estate loans receivable, net of credit allowance	223,627	240,269
Total loans receivable, net of credit allowance	1,292,308	683,641
Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Carrying Value	889,556	299,430
Other real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Carrying Value	194,477	152,739
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on real estate loans receivable	$ (15,352)	$ (8,797)