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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2020
Stock-Based Compensation |
Schedule of stock-based compensation expense | Stock-based compensation expense is included in the consolidated statements of income as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
(In thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
General and administrative | ​ | $ | 441 | ​ | $ | 489 | ​ | $ | 1,251 | ​ | $ | 1,568

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