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The following table presents additional information about marketable equity securities: (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |  |
Sales of marketable equity securities |  |  | $ (430,000) | $ (110,000)
Realized gains on marketable equity securities |  |  | 397,000 |
Unrealized gains on marketable equity securities | (1,915,000) | $ 337,000 | 45,000 | $ (29,000)
Common Stock [Member] |  |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |  |
Balance at January 1, 2021 |  |  | 2,563,000 |
Purchases of marketable equity securities in operations |  |  | 270,742,000 |
Conversion of debt securities to marketable securities |  |  | 2,656,000 |
Sales of marketable equity securities in operations |  |  | (251,126,000) |
Sales of marketable equity securities |  |  | (430,000) |
Realized gains on marketable equity securities |  |  | 12,283,000 |
Unrealized gains on marketable equity securities |  |  | 3,484,000 |
Balance at June 30, 2021 | $ 30,172,000 |  | $ 30,172,000 |

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- Definition Amount of unrealized gain (loss) on investment in marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
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