Investments - Unrealized Losses (Details) - Debt Securities - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Cost or amortized Cost
Total Cost or Amortized Cost	$ 251,965	$ 249,529
Fair value
Total Fair Value	247,367	246,876
Unrealized Loss
Total Unrealized Loss	$ (4,598)	$ (2,653)
Percent to Total	100.00%
NAIC Rating 1 | AAA/AA/A | Aaa/Aa/A
Cost or amortized Cost
Total Cost or Amortized Cost	$ 152,119
Fair value
Total Fair Value	150,542
Unrealized Loss
Total Unrealized Loss	$ (1,577)
Percent to Total	34.30%
NAIC Rating 2 | BBB | Baa
Cost or amortized Cost
Total Cost or Amortized Cost	$ 25,884
Fair value
Total Fair Value	25,436
Unrealized Loss
Total Unrealized Loss	$ (448)
Percent to Total	9.70%
NAIC Rating 3 | BB | Ba
Cost or amortized Cost
Total Cost or Amortized Cost	$ 26,706
Fair value
Total Fair Value	26,052
Unrealized Loss
Total Unrealized Loss	$ (654)
Percent to Total	14.20%
NAIC Rating 4 | B | B
Cost or amortized Cost
Total Cost or Amortized Cost	$ 42,998
Fair value
Total Fair Value	41,372
Unrealized Loss
Total Unrealized Loss	$ (1,626)
Percent to Total	35.40%
NAIC Rating 5 | CCC | Caa
Cost or amortized Cost
Total Cost or Amortized Cost	$ 4,086
Fair value
Total Fair Value	3,810
Unrealized Loss
Total Unrealized Loss	$ (276)
Percent to Total	6.00%
NAIC Six Rating Member | Standard Poors CC Or Lower Member | Ca
Cost or amortized Cost
Total Cost or Amortized Cost	$ 172
Fair value
Total Fair Value	155
Unrealized Loss
Total Unrealized Loss	$ (17)
Percent to Total	0.40%