Insurance Operations - Gross Written Premiums (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) item	Mar. 31, 2019 USD ($) item
Insurance Operations
Number of distribution partners contributing the largest amounts of direct written premiums | item	3	3
Direct premiums written by the largest distribution partners | $	$ 69.1	$ 50.2