XML 74 R60.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Property and Equipment - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Rigs | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) Rigs
Property Plant And Equipment [Line Items] |  |  |
Impairment charge for the write-down of drilling equipment |  |  | $ 0
Pressure Pumping |  |  |
Property Plant And Equipment [Line Items] |  |  |
Impairment charge for the write-down of drilling equipment | $ 17,400,000 | $ 0 | $ 0
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of asset groups | 58.00% |  |
Contract Drilling |  |  |
Property Plant And Equipment [Line Items] |  |  |
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of asset groups | 38.00% |  |
Directional Drilling |  |  |
Property Plant And Equipment [Line Items] |  |  |
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of asset groups | 9.00% |  |
Oilfield Rentals |  |  |
Property Plant And Equipment [Line Items] |  |  |
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of asset groups | 23.00% |  |
Rigs and Spare Rig Components That Would No Longer Be Marketed |  |  |
Property Plant And Equipment [Line Items] |  |  |
Number of rigs | Rigs | 42 |  |
Impairment charge for the write-down of drilling equipment | $ 48,400,000 | $ 29,000,000 |
Mechanically Powered Drilling Rigs That Remain Marketed But are Not Operating |  |  |
Property Plant And Equipment [Line Items] |  |  |
Number of rigs | Rigs |  |  | 19

X
- Definition Number of rigs. + References No definition available. + Details
Name: | pten_NumberOfRigs
Namespace Prefix: | pten_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of long-lived assets. + References No definition available. + Details
Name: | pten_PercentageOfExceptedCashFlowsOnUndiscountedBasisExceedingCarryingValuesOfLongLivedAssets
Namespace Prefix: | pten_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 + Details
Name: | us-gaap_TangibleAssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=pten_RigsAndSpareRigComponentsThatWouldNoLongerBeMarketedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=pten_MechanicalRigsThatRemainMarketedButAreNotOperatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |