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Investments, Securities with Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | $ 29,783 | $ 49,633
12 months or longer | 6,037 | 125,778
Total | 35,820 | 175,411
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 220 | 1,592
12 months or longer | 127 | 10,259
Total | 347 | 11,851
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 | 3,432 | 0
12 months or longer | 3,533 | 24,786
Total | 6,965 | 24,786
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 22 | 0
12 months or longer | 31 | 1,061
Total | 53 | 1,061
Obligations of States and Political Subdivisions [Member] |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | 3,106 | 0
12 months or longer | 0 | 3,980
Total | 3,106 | 3,980
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 53 | 0
12 months or longer | 0 | 72
Total | 53 | 72
Corporate Securities [Member] |  |
Available-for-sale securities, continuous unrealized loss position, Fair Value [Abstract] |  |
Less than 12 months | 23,245 | 49,633
12 months or longer | 2,504 | 97,012
Total | 25,749 | 146,645
Available-for-sale securities, continuous unrealized loss position, Unrealized Losses [Abstract] |  |
Less than 12 months | 145 | 1,592
12 months or longer | 96 | 9,126
Total | $ 241 | $ 10,718

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
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