Segment Reporting - Narratives (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting Information
Number of business segments | segment			2
Disposition of goodwill			$ 34,273
Real Estate
Segment Reporting Information
Gross contract revenue	$ 1,427	$ 15,436	7,394	$ 31,432
Disposition of goodwill			0
Real Estate | Hotel in Bloomington, Minnesota
Segment Reporting Information
Gross contract revenue	100	4,100	2,800	7,500
Real Estate | Hotel in Miami, FL
Segment Reporting Information
Gross contract revenue		3,700	1,900	6,600
Investment Management
Segment Reporting Information
Gross contract revenue	$ 6,883	$ 13,669	21,296	$ 29,787
Disposition of goodwill			$ 34,273