Investments Classified by Maturity Date (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value
Total	$ 884,861	$ 862,345
Fixed Maturities
Cost or Amortized Cost
Due in one year or less	96,690
Due after one year through five years	282,855
Due after five years through ten years	179,718
Due after ten years	5,642
Asset and mortgage backed securities	304,693
Cost or adjusted/amortized cost	$ 869,598	874,445
Percent of Total
Due in one year or less	11.10%
Due after one year through five years	32.50%
Due after five years through ten years	20.70%
Due after ten years	0.60%
Asset and mortgage backed securities	35.10%
Total	100.00%
Fair Value
Due in one year or less	$ 96,898
Due after one year through five years	287,086
Due after five years through ten years	185,908
Due after ten years	5,937
Asset or mortgage backed securities	309,032
Total	$ 884,861	$ 862,345
Percent of Total
Due in one year or less	11.00%
Due after one year through five years	32.40%
Due after five years through ten years	21.00%
Due after ten years	0.70%
Asset and mortgage backed securities	34.90%
Total	100.00%