Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Client relationships, Gross Carrying Amount		$ 2,793	$ 95
Client relationships, Accumulated Amortization		1,543
Client relationships, Net	$ 0	0
Fund management contracts	1,250	1,250	$ 1,250
Intangible assets—net		1,250
Client Relationships
Finite-Lived Intangible Assets [Line Items]
Client relationships, Gross Carrying Amount		1,543
Client relationships, Net		0
Fund Management Contracts Member
Finite-Lived Intangible Assets [Line Items]
Fund management contracts	1,250	1,250
Intangible assets—net	$ 1,250	$ 1,250