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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary of Significant Accounting Policies |
Inventory, net |
|  | December 31, |
|  | 2017 |  | 2016 |
|  | (In thousands) |
Raw materials |  | $ | 124,635 |  | $ | 84,431 |
Work-in-progress |  |  | 19,113 |  |  | 1,204 |
Finished goods |  |  | 22,559 |  |  | 17,960 |
|  | $ | 166,307 |  | $ | 103,595 |
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments | The change in the carrying amount of goodwill for our reporting units for the years ended December 31, 2017 and 2016 was as follows:
|  |  |  |  | Acquisitions |  |  |  |  |  |  |  |  |  |
|  |  |  |  | and |  |  |  |  |  |  |  |  |  |
|  | Balance at |  | Purchase |  | Disposals |  | Cumulative |  | Balance at |
|  | December 31, |  | Price |  | and |  | Translation |  | December 31, |
|  | 2015 |  | Adjustments |  | Impairments |  | Adjustment |  | 2016 |
|  | (In thousands) |
Drilling & Rig Technologies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 50,149 |  | $ | — |  | $ | — |  | $ | — |  | $ | 50,149 |
International |  |  | 75,634 |  |  | — |  |  | — |  |  | — |  |  | 75,634 |
Rig Technologies |  |  | 40,876 |  |  | — |  |  | — |  |  | 258 |  |  | 41,134 |
Total |  | $ | 166,659 |  | $ | — |  | $ | — |  | $ | 258 |  | $ | 166,917 |
|  |  |  |  | Acquisitions |  |  |  |  |  |  |  |  |  |
|  |  |  |  | and |  |  |  |  |  |  |  |  |  |
|  | Balance at |  | Purchase |  | Disposals |  | Cumulative |  | Balance at |
|  | December 31, |  | Price |  | and |  | Translation |  | December 31, |
|  | 2016 |  | Adjustments |  | Impairments |  | Adjustment |  | 2017 |
|  | (In thousands) |
Drilling & Rig Technologies: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 50,149 |  | $ | — |  | $ | — |  | $ | — |  | $ | 50,149 |
International |  |  | 75,634 |  |  | — |  |  | — |  |  | — |  |  | 75,634 |
Rig Technologies |  |  | 41,134 |  |  | 5,690 | (1) |  | — |  |  | 619 |  |  | 47,443 |
Total |  | $ | 166,917 |  | $ | 5,690 |  | $ | — |  | $ | 619 |  | $ | 173,226 |
| (1) |  | Represents the goodwill recorded in connection with our acquisition of RDS. See Note 5—Acquisitions for additional discussion.

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