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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Summary of Significant Accounting Policies |
Inventory |
|  | December 31, |
|  | 2014 |  | 2013 |
|  | (In thousands) |
Raw materials |  | $ | 133,797 |  | $ | 128,606 |
Work-in-progress |  |  | 39,617 |  |  | 26,762 |
Finished goods |  |  | 56,653 |  |  | 54,425 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 230,067 |  | $ | 209,793 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
|  | Balance at December 31, 2012 |  | Acquisitions and Purchase Price Adjustments |  | Disposals and Impairments |  | Cumulative Translation Adjustment |  | Balance at December 31, 2013 |
|  | (In thousands) |
Drilling & Rig Services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 50,149 |  | $ | — |  | $ | — |  | $ | — |  | $ | 50,149 |
Rig Services |  |  | 32,113 |  |  | 15,828 | (1) |  | (9,631) | (2) |  | (1,049 | ) |  | 37,261 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Drilling & Rig Services |  |  | 82,262 |  |  | 15,828 |  |  | (9,631 | ) |  | (1,049 | ) |  | 87,410 |
Completion & Production Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Completion |  |  | 334,992 |  |  | — |  |  | — |  |  | — |  |  | 334,992 |
Production |  |  | 55,072 |  |  | 35,490 | (3) |  | — |  |  | — |  |  | 90,562 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Completion & Production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 390,064 |  |  | 35,490 |  |  | — |  |  | — |  |  | 425,554 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 472,326 |  | $ | 51,318 |  | $ | (9,631 | ) | $ | (1,049 | ) | $ | 512,964 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | Balance at December 31, 2013 |  | Acquisitions and Purchase Price Adjustments |  | Disposals and Impairments |  | Cumulative Translation Adjustment |  | Balance at December 31, 2014 |
|  | (In thousands) |
Drilling & Rig Services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 50,149 |  | $ | — |  | $ | — |  | $ | — |  | $ | 50,149 |
Rig Services |  |  | 37,261 |  |  | 17,268 | (4) |  | (21,613) | (5) |  | (1,249 | ) |  | 31,667 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Drilling & Rig Services |  |  | 87,410 |  |  | 17,268 |  |  | (21,613 | ) |  | (1,249 | ) |  | 81,816 |
Completion & Production Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Completion |  |  | 334,992 |  |  | — |  |  | (334,992) | (5) |  | — |  |  | — |
Production |  |  | 90,562 |  |  | 1,550 |  |  | — |  |  | — |  |  | 92,112 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Subtotal Completion & Production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 425,554 |  |  | 1,550 |  |  | (334,992 | ) |  | — |  |  | 92,112 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 512,964 |  | $ | 18,818 |  | $ | (356,605 | ) | $ | (1,249 | ) | $ | 173,928 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) | Represents the goodwill recorded in connection with our acquisition of NES. See Note 6—Acquisitions for additional discussion.
(2) | Represents the removal of goodwill in connection with our sale of Peak and the logistic assets from one of our Canada subsidiaries.
(3) | Represents the goodwill recorded in connection with our acquisition of KVS. See Note 6—Acquisitions for additional discussion.
(4) | Represents the goodwill recorded in connection with our acquisition of 2TD. See Note 6—Acquisitions for additional discussion.
(5) | Represents the goodwill impairment associated with our acquisitions of NES and Superior in prior years. These impairment charges were deemed necessary due to the continued deterioration of oil prices. See Note 4—Impairments and Other Charges.

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