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Loans Receivable and Other Lending Investments, net (Investment in Loans and Associated Allowance for Loan Loss) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Other Lending Investments
Total		$ 171,296		$ 162,538
Less: Allowance for loan losses
Individually evaluated for impairment		(640)		(743)
Collectively evaluated for impairment		(5,730)		(12,427)
Total		(6,370)		(13,170)
Individually Evaluated for Impairment		58,179		52,562
Collectively Evaluated for Impairment		347,330		679,768
Total loans receivable and other lending investments, net	[1]	405,509		732,330
Net discounts		800		800
Held-to-maturity debt securities
Other Lending Investments
Individually Evaluated for Impairment		0		0
Collectively Evaluated for Impairment		95,258		90,715
Total		95,258		90,715
Available-for-sale debt securities
Other Lending Investments
Individually Evaluated for Impairment		0		0
Collectively Evaluated for Impairment		27,535		25,274
Total		27,535		25,274
Construction Loans
Loans
Individually Evaluated for Impairment		58,819		53,305
Collectively Evaluated for Impairment		136,394		461,528
Total		195,213		514,833
Less: Allowance for loan losses
Total		(1,491)	$ (1,640)	(6,541)	$ (9,138)	$ (11,736)	$ (6,668)
Loans
Loans
Individually Evaluated for Impairment		0		0
Collectively Evaluated for Impairment		45,370		68,129
Total		45,370		68,129
Less: Allowance for loan losses
Total		(754)	(1,619)	(1,643)	(478)	(905)	$ (265)
Net discounts		200		2,300
Financing receivables
Loans
Individually Evaluated for Impairment		0		0
Collectively Evaluated for Impairment		48,503		46,549
Total		48,503		46,549
Less: Allowance for loan losses
Total		$ (947)	$ (893)	$ (1,150)	$ (1,176)	$ (1,159)
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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