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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill by Operating Segment | Goodwill — Goodwill by operating segment as of September 30, 2020 and changes for the nine months then ended are as follows (in thousands):
| Contract |
| Drilling |
Balance at beginning of period | $ | 395,060 |
Impairment |  | (395,060 | )
Balance at end of period | $ | — |
Gross Carrying Amount and Accumulated Amortization of Intangible Assets | Intangible Assets — The following table presents the gross carrying amount and accumulated amortization of our intangible assets as of September 30, 2020 and December 31, 2019 (in thousands):
| September 30, 2020 |  |  | December 31, 2019 |
| Gross |  |  |  |  |  |  | Net |  |  | Gross |  |  |  |  |  |  | Net |
| Carrying |  |  | Accumulated |  |  | Carrying |  |  | Carrying |  |  | Accumulated |  |  | Carrying |
| Amount |  |  | Amortization |  |  | Amount |  |  | Amount |  |  | Amortization |  |  | Amount |
Customer relationships | $ | 28,000 |  |  | $ | (26,453 | ) |  | $ | 1,547 |  |  | $ | 28,000 |  |  | $ | (19,710 | ) |  | $ | 8,290 |
Developed technology |  | 55,772 |  |  |  | (24,484 | ) |  |  | 31,288 |  |  |  | 55,772 |  |  |  | (15,386 | ) |  |  | 40,386 |
Internal use software |  | 603 |  |  |  | (287 | ) |  |  | 316 |  |  |  | 482 |  |  |  | (214 | ) |  |  | 268 |
| $ | 84,375 |  |  | $ | (51,224 | ) |  | $ | 33,151 |  |  | $ | 84,254 |  |  | $ | (35,310 | ) |  | $ | 48,944 |

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