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Fair Value of Financial Instruments (Carrying Value and Estimated Fair Value) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fixed maturities: |  |
Available-for-sale securities | $ 1,816,765 | $ 1,825,438
Equity securities | 193,263 | 206,685
Mortgage loans | 47,494 | 47,614
Fair Value |  |
Fixed maturities: |  |
Available-for-sale securities | 1,817,743 |
Equity securities | 193,263 | 206,685
Mortgage loans | 48,129 | 48,932
Other long-term investments | 77,816 | 69,305
Short-term investments | 804 | 175
Cash and cash equivalents | 71,514 | 87,948
Corporate-owned life insurance | 9,188 | 8,557
Liabilities |  |
Long Term Debt | 46,683 | 50,000
Fair Value | Fixed maturities |  |
Fixed maturities: |  |
Available-for-sale securities | 1,816,939 | 1,825,443
Carrying Value |  |
Fixed maturities: |  |
Available-for-sale securities | 1,817,569 |
Equity securities | 193,263 | 206,685
Mortgage loans | 47,494 | 47,614
Other long-term investments | 77,816 | 69,305
Short-term investments | 804 | 175
Cash and cash equivalents | 71,514 | 87,948
Corporate-owned life insurance | 9,188 | 8,557
Liabilities |  |
Long Term Debt | 50,000 | 50,000
Carrying Value | Fixed maturities |  |
Fixed maturities: |  |
Available-for-sale securities | $ 1,816,765 | $ 1,825,438

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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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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