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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2020
Summary of Significant Accounting Policies |
Inventory | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ |  | 2020 |  | 2019 |
​ | ​ | (In thousands) |
Raw materials | ​ | $ | 133,563 | ​ | $ | 130,414 | ​
Work-in-progress | ​ |  | 7,777 | ​ |  | 5,498 | ​
Finished goods | ​ |  | 25,197 | ​ |  | 40,429 | ​
​ | ​ | $ | 166,537 | ​ | $ | 176,341 | ​
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Acquisitions |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
​ | ​ | ​ | ​ | ​ | and | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
​ | ​ | Balance at | ​ | Purchase | ​ | Disposals | ​ | Cumulative | ​ | Balance at |
​ | ​ | December 31, | ​ | Price | ​ | and | ​ | Translation | ​ | June 30, |
​ | ​ | 2019 | ​ | Adjustments | ​ | Impairments | ​ | Adjustment | ​ | 2020 |
​ | ​ | (In thousands) |
Drilling Solutions | ​ | $ | 11,436 | ​ | $ | — | ​ | $ | (11,436) | (1) | $ | — | ​ | $ | — | ​
Rig Technologies | ​ |  | 16,944 | ​ |  | — | ​ |  | (16,362) | (1) |  | (582) | ​ |  | — | ​
Total | ​ | $ | 28,380 | ​ | $ | — | ​ | $ | (27,798) | ​ | $ | (582) | ​ | $ | — | ​
​
(1) | Due to industry conditions that existed at March 31, 2020 such as the drop in commodity prices and the corresponding impact on future expectations of demand for our products and services, including the effect on our stock price, we performed a quantitative impairment assessment of our goodwill as of March 31, 2020. Based on the results of our goodwill test, we recognized a goodwill impairment of $27.8 million. See Note 10—Impairments and Other Charges.

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