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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2011
Goodwill by Operating Segment | Goodwill — Goodwill by operating segment as of December 31, 2011 and 2010 and changes for the years then ended are as follows (in thousands):
|  | Contract Drilling |  |  | Pressure Pumping |  |  | Total |
Balance December 31, 2009 |  | $ | 86,234 |  |  | $ | — |  |  | $ | 86,234 |
Acquisition |  |  | — |  |  |  | 67,575 |  |  |  | 67,575 |
Balance December 31, 2010 |  |  | 86,234 |  |  |  | 67,575 |  |  |  | 153,809 |
Changes to goodwill |  |  | — |  |  |  | — |  |  |  | — |
Balance December 31, 2011 |  | $ | 86,234 |  |  | $ | 67,575 |  |  | $ | 153,809 |
Gross Carrying Amount and Accumulated Amortization of Intangible Assets | The following table presents the gross carrying amount and accumulated amortization of intangible assets as of December 31, 2011 and 2010 (in thousands):
|  | 2011 |  |  | 2010 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Non-compete agreement |  | $ | 1,400 |  |  | $ | (583 | ) |  | $ | 817 |  |  | $ | 1,400 |  |  | $ | (116 | ) |  | $ | 1,284 |
Customer relationships |  |  | 25,500 |  |  |  | (4,553 | ) |  |  | 20,947 |  |  |  | 25,500 |  |  |  | (910 | ) |  |  | 24,590 |
Total intangible assets |  | $ | 26,900 |  |  | $ | (5,136 | ) |  | $ | 21,764 |  |  | $ | 26,900 |  |  | $ | (1,026 | ) |  | $ | 25,874 |

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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Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- Definition Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -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. + Details
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