Investments (Investment Gains and Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,361,254	$ 1,343,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	41,009	129,896
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	46,853	3,034
Fixed maturity securities, available-for-sale	1,355,410	1,470,617
US Treasury Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	9,494	9,515
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	681	1,097
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	5	1
Fixed maturity securities, available-for-sale	10,170	10,611
US Government Agencies Debt Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,456	3,463
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	693	996
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, available-for-sale	4,149	4,459
US States and Political Subdivisions Debt Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	354,513	356,594
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	13,363	28,056
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	9,481	692
Fixed maturity securities, available-for-sale	358,395	383,958
Corporate Debt Securities Financial Sector Member [Domain]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	220,033	213,652
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,394	22,477
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	9,036	172
Fixed maturity securities, available-for-sale	215,391	235,957
Corporate Debt Security Consumer Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	227,963	219,223
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7,180	23,658
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	12,375	900
Fixed maturity securities, available-for-sale	222,768	241,981
Corporate Debt Security Energy Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	76,884	76,989
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,684	7,334
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1,905	68
Fixed maturity securities, available-for-sale	76,663	84,255
Corporate Debt Security All Other Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	305,831	302,141
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7,191	29,855
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	13,714	1,181
Fixed maturity securities, available-for-sale	299,308	330,815
Residential Mortgage Backed Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	117,848	117,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	5,549	16,046
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	235	6
Fixed maturity securities, available-for-sale	123,162	133,795
Asset-backed Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	45,131	44,322
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	268	368
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	102	14
Fixed maturity securities, available-for-sale	45,297	44,676
Foreign Government, Non-US [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	101	101
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	6	9
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, available-for-sale	$ 107	$ 110

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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