Investments (Unrealized Losses) (Details)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 68,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 5,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	0
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 68,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 5,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	2
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 93,810,000	$ 21,715,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 9,274,000	$ 692,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	103	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 807,000	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 207,000	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	2	0
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 94,617,000	$ 21,715,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 9,481,000	$ 692,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	105	15
Corporate Debt Securities Financial Sector Member [Domain]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 100,331,000	$ 8,059,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 8,800,000	$ 86,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	124	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 1,075,000	$ 1,227,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 236,000	$ 86,000
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	$ 101,406,000	$ 9,286,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 9,036,000	$ 172,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	125	16
Corporate Debt Security Consumer Sector
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 118,748,000	$ 29,494,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 11,657,000	$ 777,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	139	28
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 3,348,000	$ 2,419,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 718,000	$ 123,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	7	1
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 122,096,000	$ 31,913,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 12,375,000	$ 900,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	146	29
Corporate Debt Security Energy Sector
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 30,597,000	$ 7,381,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 1,905,000	$ 68,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	37	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 30,597,000	$ 7,381,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,905,000	$ 68,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	37	8
Corporate Debt Security All Other Sector
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 139,085,000	$ 33,384,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 11,752,000	$ 781,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	187	30
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 8,747,000	$ 4,523,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 1,962,000	$ 400,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	6	4
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 147,832,000	$ 37,907,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 13,714,000	$ 1,181,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	193	34
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 4,793,000	$ 1,084,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 235,000	$ 6,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	14	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 4,793,000	$ 1,084,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 235,000	$ 6,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	14	6
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 21,315,000	$ 9,078,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 99,000	$ 12,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	24	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 662,000	$ 663,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 3,000	$ 2,000
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	$ 21,977,000	$ 9,741,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 102,000	$ 14,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	25	12
Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 508,747,000	$ 110,267,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 43,727,000	$ 2,423,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	630	115
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 14,639,000	$ 8,832,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 3,126,000	$ 611,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	17	7
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 523,386,000	$ 119,099,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 46,853,000	$ 3,034,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	647	122
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 72,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 1,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions		2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions		0
Debt Securities, Available-for-sale, Unrealized Loss Position		$ 72,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 1,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions		2