Investments (Investment Gains and Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,391,580	$ 1,389,038
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	13,034	8,682
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	131,117	158,739
Fixed maturity securities, available-for-sale	1,273,497	1,238,981
US Treasury Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	5,950	5,983
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	165	127
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	29	48
Fixed maturity securities, available-for-sale	6,086	6,062
US Government Agencies Debt Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,380	3,404
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	287	250
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	1
Fixed maturity securities, available-for-sale	3,667	3,653
US States and Political Subdivisions Debt Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	299,622	314,203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,531	2,160
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	23,940	29,132
Fixed maturity securities, available-for-sale	278,213	287,231
Corporate Debt Securities Financial Sector Member [Domain]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	276,156	266,485
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,152	2,066
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	24,177	31,255
Fixed maturity securities, available-for-sale	256,131	237,296
Corporate Debt Security Consumer Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	253,133	250,672
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,358	2,145
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	32,726	37,094
Fixed maturity securities, available-for-sale	222,765	215,723
Corporate Debt Security Utilities Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	127,449	123,625
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,032	615
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	17,247	20,253
Fixed maturity securities, available-for-sale	111,234	103,987
Corporate Debt Security Energy Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	83,130	73,808
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	452	64
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	6,535	8,049
Fixed maturity securities, available-for-sale	77,047	65,823
Corporate Debt Security Communications Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	71,071	74,029
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	293	309
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	7,500	8,892
Fixed maturity securities, available-for-sale	63,864	65,446
Corporate Debt Security All Other Sector
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	111,435	111,124
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	823	647
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	10,675	12,439
Fixed maturity securities, available-for-sale	101,583	99,332
Commercial Mortgage Backed Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	268	171
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2	0
Fixed maturity securities, available-for-sale	267	171
Residential Mortgage Backed Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	106,816	107,174
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	14	9
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	7,633	10,060
Fixed maturity securities, available-for-sale	99,197	97,123
Asset-backed Securities [Member]
Gross Unrealized Gains and Losses [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	53,170	58,360
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	926	290
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	653	1,516
Fixed maturity securities, available-for-sale	$ 53,443	$ 57,134