Investments (Schedule of Credit Ratings of Fixed Maturity Securities) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Total fixed maturities	$ 894,471	$ 683,296
Fixed Maturities
Marketable Securities [Line Items]
Total fixed maturities	$ 894,471	$ 683,296
Percent	100.00%	100.00%
Fixed Maturities | Investment grade
Marketable Securities [Line Items]
Total fixed maturities	$ 862,858	$ 633,996
Percent	96.50%	92.80%
Fixed Maturities | Investment grade | AAA and U.S. Government
Marketable Securities [Line Items]
Total fixed maturities	$ 8,168	$ 2,674
Percent	0.90%	0.40%
Fixed Maturities | Investment grade | AA
Marketable Securities [Line Items]
Total fixed maturities	$ 452	$ 482
Percent	0.10%	0.10%
Fixed Maturities | Investment grade | A
Marketable Securities [Line Items]
Total fixed maturities	$ 308,991	$ 168,141
Percent	34.50%	24.60%
Fixed Maturities | Investment grade | BBB
Marketable Securities [Line Items]
Total fixed maturities	$ 545,247	$ 462,699
Percent	61.00%	67.70%
Fixed Maturities | Non investment grade | BB and other
Marketable Securities [Line Items]
Total fixed maturities	$ 31,613	$ 49,300
Percent	3.50%	7.20%