Investments (Schedule of Credit Ratings of Fixed Maturity Securities) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Total fixed maturities	$ 1,048,081	$ 683,296
Fixed Maturities
Marketable Securities [Line Items]
Total fixed maturities	$ 1,048,081	$ 683,296
Percent	100.00%	100.00%
Fixed Maturities | Investment grade
Marketable Securities [Line Items]
Total fixed maturities	$ 975,233	$ 633,996
Percent	93.00%	92.80%
Fixed Maturities | Investment grade | AAA and U.S. Government
Marketable Securities [Line Items]
Total fixed maturities	$ 66,886	$ 2,674
Percent	6.40%	0.40%
Fixed Maturities | Investment grade | AA
Marketable Securities [Line Items]
Total fixed maturities	$ 437	$ 482
Percent		0.10%
Fixed Maturities | Investment grade | A
Marketable Securities [Line Items]
Total fixed maturities	$ 339,322	$ 168,141
Percent	32.40%	24.60%
Fixed Maturities | Investment grade | BBB
Marketable Securities [Line Items]
Total fixed maturities	$ 568,588	$ 462,699
Percent	54.20%	67.70%
Fixed Maturities | Non investment grade | BB and other
Marketable Securities [Line Items]
Total fixed maturities	$ 72,848	$ 49,300
Percent	7.00%	7.20%