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Investments (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) Securities | Dec. 31, 2018 USD ($) Securities | Dec. 31, 2017 USD ($)
Investments [Abstract] |  |  |
Percentage of fixed maturity portfolio rated investment grade based on NAIC designations | 98.00% | 97.00% |
Number of securities in unrealized loss position | Securities | 1,033 | 2,715 |
Percentage of unrealized losses on fixed maturity securities where securities are rated investment grade | 79.00% | 87.00% |
Proceeds from sales of available for sale fixed maturity securities | $ 1,000,000 | $ 2,500,000 | $ 700,000
Principal repayments, calls and tenders of available for sale fixed maturity securities | 2,300,000 | 1,400,000 | $ 1,200,000
Assets on deposit with state agencies to meet regulatory requirements | 51,600,000 | 49,200,000 |
Fair value, concentration of risk, investments | $ 0 | $ 0 |

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- Definition Represents the percentage of fixed income securities at fair value rated investment grade (NAIC 1 or 2) compared to the entire fixed income security portfolio at fair value. + References No definition available. + Details
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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=75763970&loc=SL75763979-209797 + Details
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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, 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 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455 + Details
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