Mortgage Notes Receivable - Schedule of carrying value of collateral dependent loans (Details) - USD ($) $ in Thousands		Jun. 30, 2022		Mar. 31, 2022	Dec. 31, 2021		Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		$ 966,752			$ 911,744
CECL Allowance		(9,526)	[1]	$ (8,647)	(10,394)	[2]	$ (10,943)	$ (10,663)	$ (10,590)
Financing Receivable, after Allowance for Credit Loss, Total		957,226			901,350
Allowances on excess amortized cost over fair value					700
Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		18,757			45,772
CECL Allowance		(1,183)	[3]		(1,834)	[4]
Financing Receivable, after Allowance for Credit Loss, Total		17,574			43,938
Allowances on excess amortized cost over fair value		1,000			700
Senior Housing [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		14,306			61,236
Senior Housing [Member] | Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		17,192			25,337
CECL Allowance		(221)	[3]		(1,103)	[4]
Financing Receivable, after Allowance for Credit Loss, Total		16,971			24,234
Apartments
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		140,899			107,765
Entitled Land [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		46,070			45,098
Entitled Land [Member] | Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value					17,335
CECL Allowance	[4]				(42)
Financing Receivable, after Allowance for Credit Loss, Total					17,293
Single Family Housing [Member] | Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value					1,730
CECL Allowance	[4]				(15)
Financing Receivable, after Allowance for Credit Loss, Total					1,715
Condos [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		70,526			64,492
Condos [Member] | Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		1,296			1,109
CECL Allowance		(961)	[3]		(673)	[4]
Financing Receivable, after Allowance for Credit Loss, Total		335			436
Townhomes [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		99,851			93,300
Townhomes [Member] | Loan portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		269			261
CECL Allowance		(1)	[3]		(1)	[4]
Financing Receivable, after Allowance for Credit Loss, Total		268			260
Residential Lots [Member]
Loans and Leases Receivable Disclosure [Line Items]
Carrying Value		$ 134,405			$ 111,644

[1] Includes $1.0 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral. In addition, $1.4 million of the CECL allowance is excluded from this table because it relates to unfunded commitments and has been recorded as a liability under accounts payable and accrued liabilities in our condensed consolidated balance sheet.

[2] Includes $0.7 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral.

[3] Includes $1.0 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral.

[4] Includes $0.7 million in loan specific allowances for loans deemed collateral dependent based on the excess amortized cost over the fair value of the underlying collateral.