Loans Receivable and Other Lending Investments, net - Maturities (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Amortized Cost Basis
Within one year	$ 0
After one year through 5 years	89,234
After 5 years through 10 years	0
After 10 years	0
Amortized Cost Basis	89,234
Estimated Fair Value
Within one year	0
After one year through 5 years	89,234
After 5 years through 10 years	0
After 10 years	0
Total	89,234
Amortized Cost Basis
Within one year	0
After one year through 5 years	0
After 5 years through 10 years	0
After 10 years	20,680
Amortized Cost Basis	20,680
Estimated Fair Value
Within one year	0
After one year through 5 years	0
After 5 years through 10 years	0
After 10 years	24,631
Total	$ 24,631