Other Comprehensive Income - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Fixed maturity securities	$ 386	$ 436	$ 905	$ 539
Bank loan participations	6,259	(5,977)	(21,763)	(8,827)
Net realized and unrealized gains (losses) on investments in equity securities	$ 2,400	$ 3,200	$ (7,100)	$ 8,600