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Investments (Unrealized Losses) (Details) $ in Thousands	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt security maturities rated investment grade, percent	98.60%	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	$ 850	$ 835
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 38	$ 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	$ 437	$ 435
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 63	$ 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	$ 1,287	$ 1,270
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 101	$ 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	$ 27,435	$ 42,583
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 959	$ 1,484
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	43	63
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 149,245	$ 147,534
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 30,139	$ 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	$ 176,680	$ 190,117
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 31,098	$ 33,542
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	221	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	$ 18,395	$ 29,258
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 376	$ 756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	22	53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 150,166	$ 154,448
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 29,130	$ 32,529
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	188	192
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 168,561	$ 183,706
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 29,506	$ 33,285
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	210	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	$ 34,176	$ 37,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 1,626	$ 2,053
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	40	57
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 156,503	$ 161,795
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 41,306	$ 43,902
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	213	216
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 190,679	$ 199,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 42,932	$ 45,955
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	253	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	$ 12,326	$ 16,750
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 469	$ 687
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	35	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 80,571	$ 79,488
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 21,010	$ 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	$ 92,897	$ 96,238
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 21,479	$ 22,770
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	179	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	$ 11,520	$ 11,654
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 357	$ 438
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	27	29
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 51,619	$ 52,537
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 8,784	$ 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	$ 63,139	$ 64,191
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 9,141	$ 9,959
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	89	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	$ 2,995	$ 9,973
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 98	$ 250
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	6	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 45,995	$ 48,462
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 8,390	$ 9,660
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	58	60
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 48,990	$ 58,435
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 8,488	$ 9,910
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	64	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	$ 19,993	$ 25,208
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 661	$ 1,237
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	34	38
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 70,856	$ 68,756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 16,290	$ 15,131
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	89	87
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 90,849	$ 93,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 16,951	$ 16,368
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	123	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	$ 86	$ 89
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 3	$ 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	$ 86	$ 189
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 3	$ 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	$ 58	$ 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	2	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 95,514	$ 93,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 9,786	$ 13,024
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	83	84
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 95,572	$ 93,391
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 9,787	$ 13,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	85	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	$ 6,519	$ 10,330
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 270	$ 243
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	10	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 14,338	$ 14,741
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 486	$ 563
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	15	16
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 20,857	$ 25,071
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 756	$ 806
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	25	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	$ 134,267	$ 184,082
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 4,855	$ 7,201
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	222	327
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 815,330	$ 821,516
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 165,387	$ 178,540
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	1,036	1,045
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 949,597	$ 1,005,598
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 170,242	$ 185,741
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	1,258	1,372

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