Notes and Other Receivables - Allowance for credit loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 756
Provision for credit losses	(381)	$ (141)	$ (687)
Ending balance	334	756
Mezzanine and Bridge Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	756
Provision for credit losses	(422)
Ending balance	334	756
Mezzanine Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	671
Provision for credit losses	(337)
Ending balance	334	671
Bridge Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	85
Provision for credit losses	(85)
Ending balance	$ 0	$ 85