Investments (Fair Value and Losses by Investment Category and Length of Time in a Loss Position) (Details) - Fixed maturities - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	$ 89,043	$ 38,534
Less than Twelve Months, Gross Unrealized Losses	4,184	650
Twelve Months or More, Fair Value	36,660	38,690
Twelve Months or More, Gross Unrealized Losses	4,250	2,351
Total, Fair Value	125,703	77,224
Total, Gross Unrealized Losses	8,434	3,001
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	1,977	0
Less than Twelve Months, Gross Unrealized Losses	34	0
Twelve Months or More, Fair Value	0	400
Twelve Months or More, Gross Unrealized Losses	0	0
Total, Fair Value	1,977	400
Total, Gross Unrealized Losses	34	0
U.S. public corporate securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	34,409	16,892
Less than Twelve Months, Gross Unrealized Losses	1,687	190
Twelve Months or More, Fair Value	0	1,073
Twelve Months or More, Gross Unrealized Losses	0	337
Total, Fair Value	34,409	17,965
Total, Gross Unrealized Losses	1,687	527
U.S. private corporate securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	24,994	7,350
Less than Twelve Months, Gross Unrealized Losses	1,367	140
Twelve Months or More, Fair Value	0	4,757
Twelve Months or More, Gross Unrealized Losses	0	13
Total, Fair Value	24,994	12,107
Total, Gross Unrealized Losses	1,367	153
Foreign public corporate securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	4,989	2,054
Less than Twelve Months, Gross Unrealized Losses	326	23
Twelve Months or More, Fair Value	0	2,427
Twelve Months or More, Gross Unrealized Losses	0	57
Total, Fair Value	4,989	4,481
Total, Gross Unrealized Losses	326	80
Foreign private corporate securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	19,719	10,659
Less than Twelve Months, Gross Unrealized Losses	728	281
Twelve Months or More, Fair Value	33,253	27,048
Twelve Months or More, Gross Unrealized Losses	4,164	1,929
Total, Fair Value	52,972	37,707
Total, Gross Unrealized Losses	4,892	2,210
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	2,955	1,488
Less than Twelve Months, Gross Unrealized Losses	42	12
Twelve Months or More, Fair Value	3,407	2,985
Twelve Months or More, Gross Unrealized Losses	86	15
Total, Fair Value	6,362	4,473
Total, Gross Unrealized Losses	128	27
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than Twelve Months, Fair Value	0	91
Less than Twelve Months, Gross Unrealized Losses	0	4
Twelve Months or More, Fair Value	0	0
Twelve Months or More, Gross Unrealized Losses	0	0
Total, Fair Value	0	91
Total, Gross Unrealized Losses	$ 0	$ 4