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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill by Operating Segment | Goodwill — Goodwill by operating segment as of June 30, 2020 and changes for the six 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 June 30, 2020 and December 31, 2019 (in thousands):
| June 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 |  |  | $ | (24,206 | ) |  | $ | 3,794 |  |  | $ | 28,000 |  |  | $ | (19,710 | ) |  | $ | 8,290 |
Developed technology |  | 55,772 |  |  |  | (21,450 | ) |  |  | 34,322 |  |  |  | 55,772 |  |  |  | (15,386 | ) |  |  | 40,386 |
Internal use software |  | 482 |  |  |  | (262 | ) |  |  | 220 |  |  |  | 482 |  |  |  | (214 | ) |  |  | 268 |
| $ | 84,254 |  |  | $ | (45,918 | ) |  | $ | 38,336 |  |  | $ | 84,254 |  |  | $ | (35,310 | ) |  | $ | 48,944 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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