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Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2022
Accumulated Other Comprehensive Income |
Schedule of changes in accumulated other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Loss on | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Marketable | ​ | Foreign | ​ | ​ | ​
​ |  | Securities |  | Currency Items |  | Total
​ | ​ | (In thousands)
Balance at December 31, 2021 | ​ | $ | (702) | ​ | $ | 2,596 | ​ | $ | 1,894
Other comprehensive loss | ​ |  | (2,311) | ​ |  | — | ​ |  | (2,311)
Balance at June 30, 2022 | ​ | $ | (3,013) | ​ | $ | 2,596 | ​ | $ | (417)

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