Segment Reporting - Narratives (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Apr. 13, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information
Number of business segments | segment				2
Disposition of goodwill				$ 34,273
Real Estate
Segment Reporting Information
Gross contract revenue		$ 1,974	$ 9,538	9,368	$ 40,970
Disposition of goodwill				0
Real Estate | Hotel in Bloomington, Minnesota
Segment Reporting Information
Gross contract revenue		600	3,900	3,400	11,400
Real Estate | Hotel in Miami, FL
Segment Reporting Information
Gross contract revenue			3,500	1,900	10,100
Investment Management
Segment Reporting Information
Gross contract revenue		$ 5,024	$ 15,251	26,320	$ 45,038
Disposition of goodwill	$ 34,300			$ 34,273