Investments - Security Holdings in an Unrealized Loss Position - General Information (Details) $ in Thousands	Jun. 30, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Number of positions:
Number of unrealized loss positions | security	85	51
Fair Value
Fair Value	$ 39,993	$ 20,944
Unrealized Losses
Unrealized Losses	$ 1,970	$ 117