XML 25 R47.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Goodwill by Operating Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015
Goodwill [Line Items] |
Beginning Balance | $ 210,795 us-gaap_Goodwill
Changes to goodwill | 0 us-gaap_GoodwillPeriodIncreaseDecrease
Ending Balance | 210,795 us-gaap_Goodwill
Contract Drilling |
Goodwill [Line Items] |
Beginning Balance | 86,234 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember
Changes to goodwill | 0 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember
Ending Balance | 86,234 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember
Pressure Pumping |
Goodwill [Line Items] |
Beginning Balance | 124,561 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember
Changes to goodwill | 0 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember
Ending Balance | $ 124,561 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: 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=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: 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=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=pten_ContractDrillingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=pten_PressurePumpingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |