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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2011
Goodwill by Operating Segment | Goodwill — Goodwill by operating segment as of June 30, 2011 and changes for the six months then ended are as follows (in thousands):
|  | January 1, Balance |  |  | Changes to Goodwill |  |  | June 30, Balance |
Contract Drilling: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 86,234 |  |  | $ | — |  |  | $ | 86,234 |
Accumulated impairment losses |  |  | — |  |  |  | — |  |  |  | — |
Net goodwill in contract drilling segment |  |  | 86,234 |  |  |  | — |  |  |  | 86,234 |
Pressure Pumping: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 67,575 |  |  |  | — |  |  |  | 67,575 |
Accumulated impairment losses |  |  | — |  |  |  | — |  |  |  | — |
Net goodwill in pressure pumping segment |  |  | 67,575 |  |  |  | — |  |  |  | 67,575 |
Total goodwill |  | $ | 153,809 |  |  | $ | — |  |  | $ | 153,809 |
Goodwill by operating segment as of June 30, 2010 and changes for the six months then ended are as follows (in thousands):
|  | January 1, Balance |  |  | Changes to Goodwill |  |  | June 30, Balance |
Contract Drilling: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 86,234 |  |  | $ | — |  |  | $ | 86,234 |
Accumulated impairment losses |  |  | — |  |  |  | — |  |  |  | — |
Net goodwill in contract drilling segment |  |  | 86,234 |  |  |  | — |  |  |  | 86,234 |
Total goodwill |  | $ | 86,234 |  |  | $ | — |  |  | $ | 86,234 |
Activity with Respect to Intangible Assets | The following table sets forth the activity with respect to intangible assets for the six months ended June 30, 2011 (in thousands):
|  | January 1, Balance |  |  | Amortization |  |  | June 30, Balance |
Non-compete agreement |  | $ | 1,400 |  |  | $ | — |  |  | $ | 1,400 |
Accumulated amortization |  |  | (116 | ) |  |  | (233 | ) |  |  | (349 | )
Net non-compete agreement |  |  | 1,284 |  |  |  | (233 | ) |  |  | 1,051 |
Customer relationships |  |  | 25,500 |  |  |  | — |  |  |  | 25,500 |
Accumulated amortization |  |  | (910 | ) |  |  | (1,822 | ) |  |  | (2,732 | )
Net customer relationships |  |  | 24,590 |  |  |  | (1,822 | ) |  |  | 22,768 |
Total intangible assets, net (excluding goodwill) |  | $ | 25,874 |  |  | $ | (2,055 | ) |  | $ | 23,819 |

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- Definition Tabular disclosure of amortizable intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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