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Investments (Unrealized Losses) (Details) $ in Thousands	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt security maturities rated investment grade, percent	99.20%	99.20%
US Treasury Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 855	$ 835
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 31	$ 51
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	3	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 444	$ 435
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 56	$ 64
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	5	5
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 1,299	$ 1,270
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 87	$ 115
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	8	8
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 29,060	$ 42,583
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 845	$ 1,484
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	44	63
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 151,175	$ 147,534
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 28,472	$ 32,058
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	178	177
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 180,235	$ 190,117
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 29,317	$ 33,542
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	222	240
Corporate Debt Securities Financial Sector Member [Domain]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 25,801	$ 29,258
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 480	$ 756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	36	53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 150,873	$ 154,448
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 29,729	$ 32,529
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	189	192
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 176,674	$ 183,706
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 30,209	$ 33,285
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	225	245
Corporate Debt Security Consumer Sector
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 34,644	$ 37,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 1,452	$ 2,053
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	43	57
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 164,681	$ 161,795
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 41,629	$ 43,902
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	217	216
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 199,325	$ 199,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 43,081	$ 45,955
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	260	273
Corporate Debt Security Utilities Sector
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,576	$ 16,750
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 428	$ 687
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	36	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 80,755	$ 79,488
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 20,990	$ 22,083
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	144	142
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 94,331	$ 96,238
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 21,418	$ 22,770
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	180	189
Corporate Debt Security Energy Sector
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 14,597	$ 11,654
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 321	$ 438
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	31	29
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 51,654	$ 52,537
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 8,847	$ 9,521
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	62	65
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 66,251	$ 64,191
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 9,168	$ 9,959
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	93	94
Corporate Debt Security Communications Sector
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,628	$ 9,973
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 93	$ 250
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	7	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 49,759	$ 48,462
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 8,737	$ 9,660
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	61	60
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 54,387	$ 58,435
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 8,830	$ 9,910
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	68	71
Corporate Debt Security All Other Sector
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 25,067	$ 25,208
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 840	$ 1,237
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	36	38
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 72,295	$ 68,756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 15,475	$ 15,131
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	90	87
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 97,362	$ 93,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 16,315	$ 16,368
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	126	125
Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 100
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 88	$ 89
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 4	$ 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	1	1
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 88	$ 189
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 4	$ 5
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	1	2
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 81	$ 160
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 1	$ 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	3	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 96,077	$ 93,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 10,136	$ 13,024
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	84	84
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 96,158	$ 93,391
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 10,137	$ 13,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	87	95
Asset-backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 9,736	$ 10,330
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 192	$ 243
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	15	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 14,602	$ 14,741
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 536	$ 563
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	16	16
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 24,338	$ 25,071
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 728	$ 806
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	31	30
Debt Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 158,045	$ 184,082
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 4,683	$ 7,201
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	254	327
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 832,403	$ 821,516
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 164,611	$ 178,540
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	1,047	1,045
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 990,448	$ 1,005,598
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 169,294	$ 185,741
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	1,301	1,372

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