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Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2021
Marketable Securities |
Marketable securities in equity securities with readily determinable market prices consisted of the following as of December 31, 2021 and 2020: | Marketable securities in equity securities with readily determinable market prices consisted of the following as of December 31, 2021 and 2020:
|  | Marketable equity securities at December 31, 2021 |
|  |  |  |  |  | Gross unrealized |  |  | Gross unrealized |  |  |  |  |
|  | Cost |  |  | gains |  |  | losses |  |  | Fair value |
Common shares |  | $ | 53,475,000 |  |  | $ | 32,000 |  |  | $ | (13,127,000 | ) |  | $ | 40,380,000 |
|  | Marketable equity securities at December 31, 2020 |
|  |  |  |  |  | Gross unrealized |  |  | Gross unrealized |  |  |  |  |
|  | Cost |  |  | gains |  |  | gains losses |  |  | Fair value |
Common shares |  | $ | 1,506,000 |  |  | $ | 1,083,000 |  |  | $ | (26,000 | ) |  | $ | 2,563,000 |
The following table presents additional information about marketable equity securities: | The following table presents additional information about marketable equity securities:
|  | Marketable |
|  | Equity Securities |
Balance at January 1, 2020 |  | $ | 640,000 |
Purchases of marketable equity securities |  |  | 1,425,000 |
Sales of marketable equity securities |  |  | (373,000 | )
Realized gains on marketable equity securities |  |  | 75,000 |
Unrealized gains on marketable equity securities |  |  | 796,000 |
Balance at January 1, 2021 |  |  | 2,563,000 |
Purchases of marketable equity securities in operations |  |  | 385,235,000 |
Purchases of marketable equity securities |  |  | 2,765,000 |
Conversion of debt securities to marketable securities |  |  | 2,656,000 |
Sales of marketable equity securities in operations |  |  | (355,837,000 | )
Sales of marketable equity securities |  |  | (4,062,000 | )
Realized gains on marketable equity securities |  |  | 27,377,000 |
Realized losses on marketable equity securities |  |  | (6,190,000 | )
Unrealized losses on marketable equity securities |  |  | (14,127,000 | )
Balance at December 31, 2021 |  | $ | 40,380,000 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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