Debt and Preferred Equity Investments - Investment In Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	$ 1,088,723	$ 1,076,542
2020	139,873
2019	284,821
2018	317,753
Prior	346,276
1 - Low Risk Assets - Low probability of loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	644,489	695,035
2020	139,873
2019	151,086
2018	57,511
Prior	296,019
2 - Watch List Assets - Higher potential for loss
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	437,344	365,167
2020	0
2019	133,735
2018	260,242
Prior	43,367
3 - High Risk Assets - Loss more likely than not
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying value	6,890	$ 16,340
2020	0
2019	0
2018	0
Prior	$ 6,890