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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 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 June 30, | ​ | Six Months Ended June 30,
(In thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
General and administrative | ​ | $ | 375 | ​ | $ | 474 | ​ | $ | 810 | ​ | $ | 1,079

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