Investments Gross Realized Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments
Gross realized gains fixed maturity securities	$ 1,294	$ 1,022	$ 1,468
Gross realized gains equity securities	4,536	5,129	5,244
Gross realized losses fixed maturities	(1,805)	(1,878)	(504)
Gross realized losses equity securities	(1,049)	(1,047)	(172)
Net realized gains on investments	$ 2,976	$ 3,226	$ 6,036