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Other Commitments and Contingencies (Tables) | 6 Months Ended
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Jun. 30, 2020
Other Commitments and Contingencies |
Summary of outstanding bonds | The following table summarizes our outstanding performance, licensing, insurance and other bonds, in thousands: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of
​ |  | June 30, |  | December 31,
​ | ​ | 2020 | ​ | 2019
Outstanding bonds: | ​ | ​ | ​ | ​ | ​ | ​
Performance bonds | ​ | $ | 98,435 | ​ | $ | 87,286
Licensing, insurance, and other bonds | ​ | ​ | 25,528 | ​ | ​ | 25,309
Total bonds | ​ | $ | 123,963 | ​ | $ | 112,595

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