Investments - Maturities of HTM Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Amortized Cost
After five, but within ten years	$ 34,732
Greater than ten years	7,763
Amortized Cost	42,495	$ 48,212
Fair Value
After five, but within ten years	35,377
Greater than ten years	7,974
Total	$ 43,351	$ 47,949