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Business Segments - Depreciation, Amortization and Improvement (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | $ 718,730 pten_DepreciationDepletionAmortizationAndImpairment | $ 597,469 pten_DepreciationDepletionAmortizationAndImpairment | $ 526,614 pten_DepreciationDepletionAmortizationAndImpairment
Operating Segments | Contract Drilling |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 524,023 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember | 438,728 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember | 390,316 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 147,595 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember | 129,984 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember | 111,062 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember
Operating Segments | Oil And Natural Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 42,576 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_OilAndNaturalGasMember | 24,400 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_OilAndNaturalGasMember | 21,417 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_OilAndNaturalGasMember
Corporate and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | $ 4,536 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | $ 4,357 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | $ 3,819 pten_DepreciationDepletionAmortizationAndImpairment / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember

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- Definition Depreciation depletion amortization and impairment. + References No definition available. + Details
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