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Investments, Securities with Continuous Unrealized Loss Position (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) Securities | Dec. 31, 2021 USD ($) Securities
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | $ 159,874 | $ 33,467
12 months or longer | 33,773 | 4,761
Total | 193,647 | 38,228
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 20,326 | 465
12 months or longer | 8,464 | 252
Total | 28,790 | 717
Gross OTTI losses charged to realized gains | $ 0 | $ 0
Number of securities in unrealized loss position | Securities | 237 | 61
U.S. Treasury Securities and Obligations of U.S. Government Agencies and Authorities [Member] |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | $ 23,763 | $ 30,141
12 months or longer | 19,259 | 0
Total | 43,022 | 30,141
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 2,410 | 416
12 months or longer | 3,516 | 0
Total | 5,926 | 416
Obligations of States and Political Subdivisions [Member] |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | 8,183 |
12 months or longer | 0 |
Total | 8,183 |
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 1,702 |
12 months or longer | 0 |
Total | 1,702 |
Corporate Securities [Member] |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | 127,928 | 3,326
12 months or longer | 14,514 | 4,761
Total | 142,442 | 8,087
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 16,214 | 49
12 months or longer | 4,948 | 252
Total | $ 21,162 | $ 301

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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