Loans Receivable and Other Lending Investments, net (Maturities of Company Securities) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Held-to-Maturity Securities, Amortized Cost Basis
Within one year	$ 0
After one year through 5 years	90,715
After 5 years through 10 years	0
After 10 years	0
Total	90,715
Held-to-Maturity Securities, Estimated Fair Value
Within one year	0
After one year through 5 years	90,715
After 5 years through 10 years	0
After 10 years	0
Total	90,715
Available-for-Sale Securities, 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
Total	20,680
Available-for-Sale Securities, Estimated Fair Value
Within one year	0
After one year through 5 years	0
After 5 years through 10 years	0
After 10 years	25,274
Total	$ 25,274