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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2022
INVESTMENT SECURITIES |
Schedule of marketable securities | The Company’s available-for-sale securities as of September 30, 2022 and December 31, 2021 are summarized below (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Cost |  | Unrealized Gains in Investment Income |  | Unrealized Losses in Investment Income |  | Estimated Fair Value (Level 1 Inputs)
September 30, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Stock | ​ | $ | 17,896 | ​ | $ | — | ​ | $ | (2,487) | ​ | $ | 15,409
Operating Units | ​ | ​ | 23,253 | ​ | ​ | — | ​ | ​ | (3,402) | ​ | ​ | 19,851
Total Equity Securities | ​ | ​ | 41,149 | ​ | ​ | — | ​ | ​ | (5,889) | ​ | ​ | 35,260
Total Available-for-Sale Securities | ​ | $ | 41,149 | ​ | $ | — | ​ | $ | (5,889) | ​ | $ | 35,260
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common Stock | ​ | $ | 15,643 | ​ | $ | 868 | ​ | $ | — | ​ | $ | 16,511
Operating Units | ​ | ​ | 23,253 | ​ | ​ | 1,273 | ​ | ​ | — | ​ | ​ | 24,526
Total Equity Securities | ​ | ​ | 38,896 | ​ | ​ | 2,141 | ​ | ​ | — | ​ | ​ | 41,037
Total Available-for-Sale Securities | ​ | $ | 38,896 | ​ | $ | 2,141 | ​ | $ | — | ​ | $ | 41,037

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