Investments - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Gains (Losses)
Gross realized gains	$ 124	$ 508	$ 271	$ 1,830
Gross realized losses	(195)	(402)	(825)	(1,352)
Net realized gains (losses)	(71)	106	(554)	478
Fair Value at Sale
Fair value at sale	11,524	11,009	30,439	58,160
Fair value at sale	10,517	7,652	48,013	37,688
Net fair value at sale	22,041	18,661	78,452	95,848
Fixed Maturities
Gains (Losses)
Gross realized gains	123	508	263	1,806
Gross realized losses	(195)	(396)	(815)	(1,170)
Fair Value at Sale
Fair value at sale	11,368	11,009	30,264	47,391
Fair value at sale	10,517	7,635	47,913	20,663
Equity Securities
Gains (Losses)
Gross realized gains	1	0	8	24
Gross realized losses	0	(6)	(10)	(182)
Fair Value at Sale
Fair value at sale	156	0	175	10,769
Fair value at sale	$ 0	$ 17	$ 100	$ 17,025