Investments - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt and Equity Securities, Gain (Loss)
Gross realized gains	$ 357	$ 254
Gross realized losses	(425)	(73)
Net realized gains (losses)	(68)	181
Fair Value at Sale
Fair value at sale	59,540	6,063
Fair value at sale	5,599	9,972
Net fair value at sale	65,139	16,035
Fixed Maturities
Debt and Equity Securities, Gain (Loss)
Gross realized gains	345	248
Gross realized losses	(337)	(36)
Fair Value at Sale
Fair value at sale	59,225	6,004
Fair value at sale	4,518	9,589
Equity Securities
Debt and Equity Securities, Gain (Loss)
Gross realized gains	12	6
Gross realized losses	(88)	(37)
Fair Value at Sale
Fair value at sale	280	59
Fair value at sale	953	383
Short-term Investments
Fair Value at Sale
Gross realized losses	0	0
Fair value at sale	128	0
Gross realized gains	0
Fair value at sale	$ 35	$ 0